Chapter 1. OpenShift Container Platform 4.15 release notes

Red Hat OpenShift Container Platform provides developers and IT organizations with a hybrid cloud application platform for deploying both new and existing applications on secure, scalable resources with minimal configuration and management. OpenShift Container Platform supports a wide selection of programming languages and frameworks, such as Java, JavaScript, Python, Ruby, and PHP.

Built on Red Hat Enterprise Linux (RHEL) and Kubernetes, OpenShift Container Platform provides a more secure and scalable multitenant operating system for today’s enterprise-class applications, while delivering integrated application runtimes and libraries. OpenShift Container Platform enables organizations to meet security, privacy, compliance, and governance requirements.

1.1. About this release

OpenShift Container Platform (RHSA-2023:7198) is now available. This release uses Kubernetes 1.28 with CRI-O runtime. New features, changes, and known issues that pertain to OpenShift Container Platform 4.15 are included in this topic.

OpenShift Container Platform 4.15 clusters are available at https://console.redhat.com/openshift. With the Red Hat OpenShift Cluster Manager application for OpenShift Container Platform, you can deploy OpenShift Container Platform clusters to either on-premises or cloud environments.

OpenShift Container Platform 4.15 is supported on Red Hat Enterprise Linux (RHEL) 8.8 and 8.9, and on Red Hat Enterprise Linux CoreOS (RHCOS) 4.15.

You must use RHCOS machines for the control plane, and you can use either RHCOS or RHEL for compute machines.

For OpenShift Container Platform 4.12 on x86_64 architecture, Red Hat has added a 6-month Extended Update Support (EUS) phase that extends the total available lifecycle from 18 months to 24 months. For OpenShift Container Platform 4.12 running on 64-bit ARM (aarch64), IBM Power® (ppc64le), and IBM Z® (s390x) architectures, the EUS lifecycle remains at 18 months.

Starting with OpenShift Container Platform 4.14, each EUS phase for even numbered releases on all supported architectures, including x86_64, 64-bit ARM (aarch64), IBM Power® (ppc64le), and IBM Z® (s390x) architectures, has a total available lifecycle of 24 months.

Starting with OpenShift Container Platform 4.14, Red Hat offers a 12-month additional EUS add-on, denoted as Additional EUS Term 2, that extends the total available lifecycle from 24 months to 36 months. The Additional EUS Term 2 is available on all architecture variants of OpenShift Container Platform.

For more information about this support, see the Red Hat OpenShift Container Platform Life Cycle Policy.

Maintenance support ends for version 4.12 on 17 July 2024 and goes to extended update support phase. For more information, see the Red Hat OpenShift Container Platform Life Cycle Policy.

Commencing with the 4.15 release, Red Hat is simplifying the administration and management of Red Hat shipped cluster Operators with the introduction of three new life cycle classifications; Platform Aligned, Platform Agnostic, and Rolling Stream. These life cycle classifications provide additional ease and transparency for cluster administrators to understand the life cycle policies of each Operator and form cluster maintenance and upgrade plans with predictable support boundaries. For more information, see OpenShift Operator Life Cycles.

OpenShift Container Platform is designed for FIPS. When running Red Hat Enterprise Linux (RHEL) or Red Hat Enterprise Linux CoreOS (RHCOS) booted in FIPS mode, OpenShift Container Platform core components use the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-2/140-3 Validation on only the x86_64, ppc64le, and s390x architectures.

For more information about the NIST validation program, see Cryptographic Module Validation Program. For the latest NIST status for the individual versions of RHEL cryptographic libraries that have been submitted for validation, see Compliance Activities and Government Standards.

1.2. OpenShift Container Platform layered and dependent component support and compatibility

The scope of support for layered and dependent components of OpenShift Container Platform changes independently of the OpenShift Container Platform version. To determine the current support status and compatibility for an add-on, refer to its release notes. For more information, see the Red Hat OpenShift Container Platform Life Cycle Policy.

1.3. New features and enhancements

This release adds improvements related to the following components and concepts.

1.3.1. Red Hat Enterprise Linux CoreOS (RHCOS)

1.3.1.1. RHCOS now uses RHEL 9.2

RHCOS now uses Red Hat Enterprise Linux (RHEL) 9.2 packages in OpenShift Container Platform 4.15. These packages ensure that your OpenShift Container Platform instance receives the latest fixes, features, enhancements, hardware support, and driver updates.

1.3.1.2. Support for iSCSI devices (Technology Preview)

RHCOS now supports the iscsi_bft driver, letting you boot directly from iSCSI devices that work with the iSCSI Boot Firmware Table (iBFT), as a Technology Preview. This lets you target iSCSI devices as the root disk for installation.

For more information, see the RHEL documentation.

1.3.2. Installation and update

1.3.2.1. Encrypting Azure storage account during installation

You can now encrypt Azure storage accounts during installation by providing the installation program with a customer managed encryption key. See Installation configuration parameters for descriptions of the parameters required to encrypt Azure storage accounts.

1.3.2.2. RHOSP integration into the Cluster CAPI Operator (Tech Preview)

If you enable the TechPreviewNoUpgrade feature flag, the Cluster CAPI Operator deploys the Cluster API Provider OpenStack and manages its lifecycle. The Cluster CAPI Operator automatically creates Cluster and OpenStackCluster resources for the current OpenShift Container Platform cluster.

It is now possible to configure the Cluster API Machine and OpenStackMachine resources similarly to how Machine API resources are configured. It is important to note that while Cluster API resources are functionally equivalent to Machine API resources, structurally they are not identical.

1.3.2.3. IBM Cloud and user-managed encryption

You can now specify your own IBM® Key Protect for IBM Cloud® root key as part of the installation process. This root key is used to encrypt the root (boot) volume of control plane and compute machines, and the persistent volumes (data volumes) that are provisioned after the cluster is deployed.

For more information, see User-managed encryption for IBM Cloud.

1.3.2.4. Installing a cluster on IBM Cloud with limited internet access

You can now install a cluster on IBM Cloud® in an environment with limited internet access, such as a disconnected or restricted network cluster. With this type of installation, you create a registry that mirrors the contents of the OpenShift Container Platform installation images. You can create this registry on a mirror host, which can access both the internet and your restricted network.

For more information, see Installing a cluster on IBM Cloud in a restricted network.

1.3.2.5. Installing a cluster on AWS to extend nodes to Wavelength Zones

You can quickly install an OpenShift Container Platform cluster in Amazon Web Services (AWS) Wavelength Zones by setting the zone names in the edge compute pool of the install-config.yaml file, or install a cluster in an existing VPC with Wavelength Zone subnets.

You can also perform postinstallation tasks to extend an existing OpenShift Container Platform cluster on AWS to use AWS Wavelength Zones.

For more information, see Installing a cluster on AWS with compute nodes on AWS Wavelength Zones and Extend existing clusters to use AWS Local Zones or Wavelength Zones.

1.3.2.6. Customizing the cluster network MTU on AWS deployments

Before you deploy a cluster on AWS Local Zones infrastructure, you can customize the cluster network maximum transmission unit (MTU) for your cluster network to meet the needs of your infrastructure.

You can customize the MTU for a cluster by specifying the networking.clusterNetworkMTU parameter in the install-config.yaml configuration file.

For more information, see Customizing the cluster network MTU.

1.3.2.7. Installing a cluster on AWS with compute nodes on AWS Outposts

In OpenShift Container Platform version 4.14, you could install a cluster on AWS with compute nodes running in AWS Outposts as a Technology Preview. In OpenShift Container Platform 4.15, you can install a cluster on AWS into an existing VPC and provision compute nodes on AWS Outposts as a postinstallation configuration task.

For more information, see Installing a cluster on AWS into an existing VPC and Extending an AWS VPC cluster into an AWS Outpost.

1.3.2.8. Nutanix and fault tolerant deployments

By default, the installation program installs control plane and compute machines into a single Nutanix Prism Element (cluster). To improve the fault tolerance of your OpenShift Container Platform cluster, you can now specify that these machines be distributed across multiple Nutanix clusters by configuring failure domains.

For more information, see Fault tolerant deployments using multiple Prism Elements.

1.3.2.9. OpenShift Container Platform on 64-bit ARM

OpenShift Container Platform 4.15 now supports the ability to enable 64k page sizes in the RHCOS kernel using the Machine Config Operator (MCO). This setting is exclusive to machines with 64-bit ARM architectures. For more information, see the Machine configuration tasks documentation.

1.3.2.10. Optional OLM cluster capability

In OpenShift Container Platform 4.15, you can disable the Operator Lifecycle Manager (OLM) capability during installation. For further information, see Operator Lifecycle Manager capability.

1.3.2.11. Deploying Red Hat OpenStack Platform (RHOSP) with root volume and etcd on local disk (Technology Preview)

You can now move etcd from a root volume (Cinder) to a dedicated ephemeral local disk as a Day 2 deployment. With this Technology Preview feature, you can resolve and prevent performance issues of your RHOSP installation.

For more information, see Deploying on OpenStack with rootVolume and etcd on local disk.

1.3.2.12. Configure vSphere integration with the Agent-based Installer

You can now configure your cluster to use vSphere while creating the install-config.yaml file for an Agent-based Installation. For more information, see Additional VMware vSphere configuration parameters.

1.3.2.13. Additional bare metal configurations during Agent-based installation

You can now make additional configurations for the bare metal platform while creating the install-config.yaml file for an Agent-based Installation. These new options include host configuration, network configuration, and baseboard management controller (BMC) details.

These fields are not used during the initial provisioning of the cluster, but they eliminate the need to set the fields after installation. For more information, see Additional bare metal configuration parameters for the Agent-based Installer.

1.3.2.14. Use the Dell iDRAC BMC to configure a RAID during installer-provisioned installation

You can now use the Dell iDRAC baseboard management controller (BMC) with the Redfish protocol to configure a redundant array of independent disks (RAID) for the bare metal platform during an installer-provisioned installation. For more information, see Optional: Configuring the RAID.

1.3.3. Postinstallation configuration

1.3.3.1. OpenShift Container Platform clusters with multi-architecture compute machines

On OpenShift Container Platform 4.15 clusters with multi-architecture compute machines, you can now enable 64k page sizes in the Red Hat Enterprise Linux CoreOS (RHCOS) kernel on the 64-bit ARM compute machines in your cluster. For more information on setting this parameter, see Enabling 64k pages on the Red Hat Enterprise Linux CoreOS (RHCOS) kernel.

1.3.4. Web console

1.3.4.1. Administrator perspective

This release introduces the following updates to the Administrator perspective of the web console:

Enable and disable the tailing to Pod log viewer to minimize load time.
View recommended values for VerticalPodAutoscaler on the Deployment page.

1.3.4.1.1. Node uptime information

With this update, you can enable the ability to view additional node uptime information to track node restarts or failures. Navigate to the Compute Nodes page, click Manage columns, and then select Uptime.

1.3.4.1.2. Dynamic plugin enhancements

With this update, you can add a new details item to the default resource summary on the Details page by using console.resource/details-item. The OpenShift Container Platform release also adds example implementation for annotation, label and the delete modal to the CronTab dynamic plugin.

For more information, see Dynamic plugin reference

For more information about console.resource/details-item, see OpenShift Container Platform console API.

1.3.4.1.3. OperatorHub support for Microsoft Entra Workload ID

With this release, OperatorHub detects when a OpenShift Container Platform cluster running on Azure is configured for Microsoft Entra Workload ID. When detected, a "Cluster in Workload Identity / Federated Identity Mode" notification is displayed with additional instructions before installing an Operator to ensure it runs correctly. The Operator Installation page is also modified to add fields for the required Azure credentials information.

For the updated step for the Install Operator page, see Installing from OperatorHub using the web console.

1.3.4.2. Developer Perspective

This release introduces the following updates to the Developer perspective of the web console:

Pipeline history and logs based on the data from Tekton Results are available in the dashboard without requiring PipelineRun CRs on the cluster.

1.3.4.2.1. Software Supply Chain Enhancements

The PipelineRun Details page in the Developer or Administrator perspective of the web console provides an enhanced visual representation of PipelineRuns within a Project.

For more information, see Red Hat OpenShift Pipelines.

1.3.4.2.2. Red Hat Developer Hub in the web console

With this update, a quick start is now available for you to learn more about how to install and use the developer hub.

For more information, see Product Documentation for Red Hat Developer Hub.

1.3.4.2.3. builds for OpenShift Container Platform is supported in the web console

With this update, builds for OpenShift Container Platform 1.0 is supported in the web console. Builds is an extensible build framework based on the Shipwright project. You can use builds for OpenShift Container Platform to build container images on an OpenShift Container Platform cluster.

For more information, see builds for OpenShift Container Platform.

1.3.5. IBM Z and IBM LinuxONE

With this release, IBM Z® and IBM® LinuxONE are now compatible with OpenShift Container Platform 4.15. You can perform the installation with z/VM, LPAR, or Red Hat Enterprise Linux (RHEL) Kernel-based Virtual Machine (KVM). For installation instructions, see the following documentation:

Installing a cluster with on IBM Z and IBM LinuxONE

Important

Compute nodes must run Red Hat Enterprise Linux CoreOS (RHCOS).

1.3.5.1. IBM Z and IBM LinuxONE notable enhancements

The IBM Z® and IBM® LinuxONE release on OpenShift Container Platform 4.15 adds improvements and new capabilities to OpenShift Container Platform components and concepts.

This release introduces support for the following features on IBM Z® and IBM® LinuxONE:

Agent-based Installer
cert-manager Operator for Red Hat OpenShift
s390x control plane with x86_64 multi-architecture compute nodes

1.3.5.2. Installing a cluster in an LPAR on IBM Z and IBM LinuxONE

OpenShift Container Platform now supports user-provisioned installation of OpenShift Container Platform 4.15 in a logical partition (LPAR) on IBM Z and IBM LinuxONE.

For installation instructions, see the following documentation:

1.3.6. IBM Power

IBM Power® is now compatible with OpenShift Container Platform 4.15. For installation instructions, see the following documentation:

Important

Compute nodes must run Red Hat Enterprise Linux CoreOS (RHCOS).

1.3.6.1. IBM Power notable enhancements

The IBM Power® release on OpenShift Container Platform 4.15 adds improvements and new capabilities to OpenShift Container Platform components.

This release introduces support for the following features on IBM Power®:

Agent-based Installer
cert-manager Operator for Red Hat OpenShift
IBM Power® Virtual Server Block CSI Driver Operator
Installer-provisioned Infrastructure Enablement for IBM Power® Virtual Server
Multi-architecture IBM Power® control plane with support of Intel and IBM Power® workers
nx-gzip for Power10 (Hardware Acceleration)
The openshift-install utility to support various SMT levels on IBM Power® (Hardware Acceleration)

1.3.7. IBM Power, IBM Z, and IBM LinuxONE support matrix

Starting in OpenShift Container Platform 4.14, Extended Update Support (EUS) is extended to the IBM Power® and the IBM Z® platform. For more information, see the OpenShift EUS Overview.

Table 1.1. OpenShift Container Platform features
Feature	IBM Power®	IBM Z® and IBM® LinuxONE
Alternate authentication providers	Supported	Supported
Agent-based Installer	Supported	Supported
Assisted Installer	Supported	Supported
Automatic Device Discovery with Local Storage Operator	Unsupported	Supported
Automatic repair of damaged machines with machine health checking	Unsupported	Unsupported
Cloud controller manager for IBM Cloud®	Supported	Unsupported
Controlling overcommit and managing container density on nodes	Unsupported	Unsupported
Cron jobs	Supported	Supported
Descheduler	Supported	Supported
Egress IP	Supported	Supported
Encrypting data stored in etcd	Supported	Supported
FIPS cryptography	Supported	Supported
Helm	Supported	Supported
Horizontal pod autoscaling	Supported	Supported
Hosted control planes (Technology Preview)	Supported	Supported
IBM Secure Execution	Unsupported	Supported
IBM Power® Virtual Server Block CSI Driver Operator	Supported	Unsupported
Installer-provisioned Infrastructure Enablement for IBM Power® Virtual Server	Supported	Unsupported
Installing on a single node	Supported	Supported
IPv6	Supported	Supported
Monitoring for user-defined projects	Supported	Supported
Multi-architecture compute nodes	Supported	Supported
Multipathing	Supported	Supported
Network-Bound Disk Encryption - External Tang Server	Supported	Supported
Non—volatile memory express drives (NVMe)	Supported	Unsupported
oc-mirror plugin	Supported	Supported
OpenShift CLI (`oc`) plugins	Supported	Supported
Operator API	Supported	Supported
OpenShift Virtualization	Unsupported	Unsupported
OVN-Kubernetes, including IPsec encryption	Supported	Supported
PodDisruptionBudget	Supported	Supported
Precision Time Protocol (PTP) hardware	Unsupported	Unsupported
Red Hat OpenShift Local	Unsupported	Unsupported
Scheduler profiles	Supported	Supported
Stream Control Transmission Protocol (SCTP)	Supported	Supported
Support for multiple network interfaces	Supported	Supported
Three-node cluster support	Supported	Supported
Topology Manager	Supported	Unsupported
z/VM Emulated FBA devices on SCSI disks	Unsupported	Supported
4K FCP block device	Supported	Supported

Table 1.2. Persistent storage options
Feature	IBM Power®	IBM Z® and IBM® LinuxONE
Persistent storage using iSCSI	Supported ^[1]	Supported ^[1],^[2]
Persistent storage using local volumes (LSO)	Supported ^[1]	Supported ^[1],^[2]
Persistent storage using hostPath	Supported ^[1]	Supported ^[1],^[2]
Persistent storage using Fibre Channel	Supported ^[1]	Supported ^[1],^[2]
Persistent storage using Raw Block	Supported ^[1]	Supported ^[1],^[2]
Persistent storage using EDEV/FBA	Supported ^[1]	Supported ^[1],^[2]

Persistent shared storage must be provisioned by using either Red Hat OpenShift Data Foundation or other supported storage protocols.
Persistent non-shared storage must be provisioned by using local storage, such as iSCSI, FC, or by using LSO with DASD, FCP, or EDEV/FBA.

Table 1.3. Operators
Feature	IBM Power®	IBM Z® and IBM® LinuxONE
cert-manager Operator for Red Hat OpenShift	Supported	Supported
Cluster Logging Operator	Supported	Supported
Cluster Resource Override Operator	Supported	Supported
Compliance Operator	Supported	Supported
Cost Management Metrics Operator	Supported	Supported
File Integrity Operator	Supported	Supported
HyperShift Operator	Technology Preview	Technology Preview
Local Storage Operator	Supported	Supported
MetalLB Operator	Supported	Supported
Network Observability Operator	Supported	Supported
NFD Operator	Supported	Supported
NMState Operator	Supported	Supported
OpenShift Elasticsearch Operator	Supported	Supported
Vertical Pod Autoscaler Operator	Supported	Supported

Table 1.4. Multus CNI plugins
Feature	IBM Power®	IBM Z® and IBM® LinuxONE
Bridge	Supported	Supported
Host-device	Supported	Supported
IPAM	Supported	Supported
IPVLAN	Supported	Supported

Table 1.5. CSI Volumes
Feature	IBM Power®	IBM Z® and IBM® LinuxONE
Cloning	Supported	Supported
Expansion	Supported	Supported
Snapshot	Supported	Supported

1.3.8. Authentication and authorization

1.3.8.1. OLM-based Operator support for Microsoft Entra Workload ID

With this release, some Operators managed by Operator Lifecycle Manager (OLM) on Azure clusters can use the Cloud Credential Operator (CCO) in manual mode with Microsoft Entra Workload ID. These Operators authenticate with short-term credentials that are managed outside the cluster.

For more information, see CCO-based workflow for OLM-managed Operators with Azure AD Workload Identity.

1.3.9. Networking

1.3.9.1. OVN-Kubernetes network plugin support for IPsec encryption of external traffic general availability (GA)

OpenShift Container Platform now supports encryption of external traffic, also known as north-south traffic. IPsec already supports encryption of network traffic between pods, known as east-west traffic. You can use both features together to provide full in-transit encryption for OpenShift Container Platform clusters.

This feature is supported on the following platforms:

Bare metal
Google Cloud Platform (GCP)
Red Hat OpenStack Platform (RHOSP)
VMware vSphere

For more information, see Enabling IPsec encryption for external IPsec endpoints.

1.3.9.2. IPv6 unsolicited neighbor advertisements now default on macvlan CNI plugin

Previously, if one pod (Pod X) was deleted, and a second pod (Pod Y) was created with a similar configuration, Pod Y might have had the same IPv6 address as Pod X, but it would have a different MAC address. In this scenario, the router was unaware of the MAC address change, and it would continue sending traffic to the MAC address for Pod X.

With this update, pods created using the macvlan CNI plugin, where the IP address management CNI plugin has assigned IPs, now send IPv6 unsolicited neighbor advertisements by default onto the network. This enhancement notifies the network fabric of the new pod’s MAC address for a particular IP to refresh IPv6 neighbor caches.

1.3.9.3. Configuring the Whereabouts IP reconciler schedule

The Whereabouts reconciliation schedule was hard-coded to run once per day and could not be reconfigured. With this release, a ConfigMap object has enabled the configuration of the Whereabouts cron schedule. For more information, see Configuring the Whereabouts IP reconciler schedule.

1.3.9.4. Status management updates for EgressFirewall and AdminPolicyBasedExternalRoute CR

The following updates have been made to the status management of EgressFirewall and AdminPolicyBasedExternalRoute custom resource policy:

The status.status field is set to failure if at least one message reports failure.
The status.status field is empty if no failures are reported and not all nodes have reported their status.
The status.status field is set to success if all nodes report success.
The status.mesages field lists messages. The messages are listed by the node name by default and are prefixed with the node name.

1.3.9.5. Additional BGP metrics for MetalLB

With this update, MetalLB exposes additional metrics relating to communication between MetalLB and Border Gateway Protocol (BGP) peers. For more information, see MetalLB metrics for BGP and BFD.

1.3.9.6. Supporting all-multicast mode

OpenShift Container Platform now supports configuring the all-multicast mode by using the tuning CNI plugin. This update eliminates the need to grant the NET_ADMIN capability to the pod’s Security Context Constraints (SCC), enhancing security by minimizing potential vulnerabilities for your pods.

For more information about all-multicast mode, see About all-multicast mode.

1.3.9.7. Multi-network policy support for IPv6 networks

With this update, you can now create multi-network policies for IPv6 networks. For more information, see Supporting multi-network policies in IPv6 networks.

1.3.9.8. Ingress Operator metrics dashboard available

With this release, Ingress networking metrics are now viewable from within the OpenShift Container Platform web console. See Ingress Operator dashboard for more information.

1.3.9.9. CoreDNS filtration of ExternalName service queries for subdomains

As of OpenShift Container Platform 4.15, CoreDNS has been updated from 1.10.1 to 1.11.1.

This update to CoreDNS resolved an issue where CoreDNS would incorrectly provide a response to a query for an ExternalName service that shared its name with a top-level domain, such as com or org. A query for subdomains of an external service should not resolve to that external service. See the associated CoreDNS GitHub issue for more information.

1.3.9.10. CoreDNS metrics deprecation and removal

As of OpenShift Container Platform 4.15, CoreDNS has been updated from 1.10.1 to 1.11.1.

This update to CoreDNS resulted in the deprecation and removal of certain metrics that have been relocated, including the metrics coredns_forward_healthcheck_failures_total, coredns_forward_requests_total, coredns_forward_responses_total, and coredns_forward_request_duration_seconds. See CoreDNS Metrics for more information.

1.3.9.12. Host network configuration policy for SR-IOV network VFs (Technology Preview)

With this release, you can use the NodeNetworkConfigurationPolicy resource to manage host network settings for Single Root I/O Virtualization (SR-IOV) network virtual functions (VF) in an existing cluster.

For example, you can configure a host network Quality of Service (QoS) policy to manage network access to host resources by an attached SR-IOV network VF. For more information, see Node network configuration policy for virtual functions.

1.3.9.13. Parallel node draining during SR-IOV network policy updates

With this update, you can configure the SR-IOV Network Operator to drain nodes in parallel during network policy updates. The option to drain nodes in parallel enables faster rollouts of SR-IOV network configurations. You can use the SriovNetworkPoolConfig custom resource to configure parallel node draining and define the maximum number of nodes in the pool that the Operator can drain in parallel.

For more information, see Configuring parallel node draining during SR-IOV network policy updates.

1.3.10. Registry

1.3.10.1. Support for private storage endpoint on Azure

With this release, the Image Registry Operator can be leveraged to use private storage endpoints on Azure. You can use this feature to seamlessly configure private endpoints for storage accounts when OpenShift Container Platform is deployed on private Azure clusters, so that users can deploy the image registry without exposing public-facing storage endpoints.

For more information, see the following sections:

1.3.11. Storage

1.3.11.1. Recovering volume groups from the previous LVM Storage installation

With this release, the LVMCluster custom resource (CR) provides support for recovering volume groups from the previous LVM Storage installation. If the deviceClasses.name field is set to the name of a volume group from the previous LVM Storage installation, LVM Storage recreates the resources related to that volume group in the current LVM Storage installation. This simplifies the process of using devices from the previous LVM Storage installation through the reinstallation of LVM Storage.

For more information, see Creating a Logical Volume Manager cluster on a worker node.

1.3.11.2. Support for wiping the devices in LVM Storage

This feature provides a new optional field forceWipeDevicesAndDestroyAllData in the LVMCluster custom resource (CR) to force wipe the selected devices. Before this release, wiping the devices required you to manually access the host. With this release, you can force wipe the disks without manual intervention. This simplifies the process of wiping the disks.

Warning

If forceWipeDevicesAndDestroyAllData is set to true, LVM Storage wipes all previous data on the devices. You must use this feature with caution.

For more information, see Creating a Logical Volume Manager cluster on a worker node.

1.3.11.3. Support for deploying LVM Storage on multi-node clusters

This feature provides support for deploying LVM Storage on multi-node clusters. Previously, LVM Storage only supported single-node configurations. With this release, LVM Storage supports all of the OpenShift Container Platform deployment topologies. This enables provisioning of local storage on multi-node clusters.

Warning

LVM Storage only supports node local storage on multi-node clusters. It does not support storage data replication mechanism across nodes. When using LVM Storage on multi-node clusters, you must ensure storage data replication through active or passive replication mechanisms to avoid a single point of failure.

For more information, see Deploying LVM Storage.

1.3.11.4. Integrating RAID arrays with LVM Storage

This feature provides support for integrating RAID arrays that are created using the mdadm utility with LVM Storage. The LVMCluster custom resource (CR) provides support for adding paths to the RAID arrays in the deviceSelector.paths field and the deviceSelector.optionalPaths field.

For more information, see Integrating software RAID arrays with LVM Storage.

1.3.11.5. FIPS compliance support for LVM Storage

With this release, LVM Storage is designed for Federal Information Processing Standards (FIPS). When LVM Storage is installed on OpenShift Container Platform in FIPS mode, LVM Storage uses the RHEL cryptographic libraries that have been submitted to NIST for FIPS 140-3 validation only on the x86_64 architecture.

1.3.11.6. Retroactive default StorageClass assignment is generally available

Before OpenShift Container Platform 4.13, if there was no default storage class, persistent volumes claims (PVCs) that were created that requested the default storage class remained stranded in the pending state indefinitely, unless you manually delete and recreate them. Starting with OpenShift Container Platform 4.14, as a Technology Preview feature, the default storage class is assigned to these PVCs retroactively so that they do not remain in the pending state. After a default storage class is created, or one of the existing storage classes is declared the default, these previously stranded PVCs are assigned to the default storage class. This feature is now generally available.

For more information, see Absent default storage class.

1.3.11.7. Local Storage Operator option to facilitate removing existing data on local volumes is generally available

This feature provides an optional field, forceWipeDevicesAndDestroyAllData defining whether or not to call wipefs, which removes partition table signatures (magic strings) making the disk ready to use for Local Storage Operator (LSO) provisioning. No other data besides signatures is erased. This feature is now generally available. Note that this feature does not apply to LocalVolumeSet (LVS).

For more information, see Provisioning local volumes by using the Local Storage Operator.

1.3.11.8. Detach CSI volumes after non-graceful node shutdown is generally available

Starting with OpenShift Container Platform 4.13, Container Storage Interface (CSI) drivers can automatically detach volumes when a node goes down non-gracefully as a Technology Preview feature. When a non-graceful node shutdown occurs, you can then manually add an out-of-service taint on the node to allow volumes to automatically detach from the node. This feature is now generally available.

For more information, see Detach CSI volumes after non-graceful node shutdown.

1.3.11.9. Shared VPC is supported for the GCP Filestore CSI Driver Operator as generally available

Shared virtual private cloud (VPC) for the Google Compute Platform (GCP) Container Storage Interface (CSI) Driver Operator is now supported as a generally available feature. Shared VPC simplifies network management, allows consistent network policies, and provides a centralized view of network resources.

For more information, see Creating a storage class for GCP Filestore Storage.

1.3.11.10. User-Managed encryption supports IBM VPC Block storage as generally available

The user-managed encryption feature allows you to provide keys during installation that encrypt OpenShift Container Platform node root volumes, and enables all managed storage classes to use the specified encryption key to encrypt provisioned storage volumes. This feature was introduced in OpenShift Container Platform 4.13 for Google Cloud Platform (GCP) persistent disk (PD) storage, Microsoft Azure Disk, and Amazon Web Services (AWS) Elastic Block storage (EBS), and is now supported on IBM Virtual Private Cloud (VPC) Block storage.

1.3.11.11. SELinux relabeling using mount options (Technology Preview)

Previously, when SELinux was enabled, the persistent volume’s (PV’s) files were relabeled when attaching the PV to the pod, potentially causing timeouts when the PVs contained many files, as well as overloading the storage backend.

In OpenShift Container Platform 4.15, for Container Storage Interface (CSI) driver that support this feature, the driver will mount the volume directly with the correct SELinux labels, eliminating the need to recursively relabel the volume, and pod startup can be significantly faster.

This feature is supported with Technology Preview status.

If the following conditions are true, the feature is enabled by default:

The CSI driver that provides the volume has support for this feature with seLinuxMountSupported: true in its CSIDriver instance. The following CSI drivers that are shipped as part of OpenShift Container Platform announce SELinux mount support:
- AWS Elastic Block Storage (EBS)
- Azure Disk
- Google Compute Platform (GCP) persistent disk (PD)
- IBM Virtual Private Cloud (VPC) Block
- OpenStack Cinder
- VMware vSphere
The pod that uses the persistent volume has full SELinux label specified in its spec.securityContext or spec.containers[*].securityContext by using restricted SCC.
Access mode set to ReadWriteOncePod for the volume.

1.3.12. Oracle® Cloud Infrastructure

1.3.12.1. Using the Assisted Installer to install a cluster on OCI

You can run cluster workloads on Oracle® Cloud Infrastructure (OCI) infrastructure that supports dedicated, hybrid, public, and multiple cloud environments. Both Red Hat and Oracle test, validate, and support running OCI in an OpenShift Container Platform cluster on OCI.

OCI provides services that can meet your needs for regulatory compliance, performance, and cost-effectiveness. You can access OCI Resource Manager configurations to provision and configure OCI resources.

For more information, see Using the Assisted Installer to install a cluster on OCI.

1.3.12.2. Using the Agent-based Installer to install a cluster on OCI

You can use the Agent-based Installer to install a cluster on Oracle® Cloud Infrastructure (OCI), so that you can run cluster workloads on infrastructure that supports dedicated, hybrid, public, and multiple cloud environments.

The Agent-based installer provides the ease of use of the Assisted Installation service, but with the capability to install a cluster in either a connected or disconnected environment.

OCI provides services that can meet your regulatory compliance, performance, and cost-effectiveness needs. OCI supports 64-bit x86 instances and 64-bit ARM instances.

For more information, see Using the Agent-based Installer to install a cluster on OCI.

1.3.13. Operator lifecycle

1.3.13.1. Operator Lifecycle Manager (OLM) 1.0 (Technical Preview)

Operator Lifecycle Manager (OLM) has been included with OpenShift Container Platform 4 since its initial release. OpenShift Container Platform 4.14 introduced components for a next-generation iteration of OLM as a Technology Preview feature, known during this phase as OLM 1.0. This updated framework evolves many of the concepts that have been part of previous versions of OLM and adds new capabilities.

During this Technology Preview phase of OLM 1.0 in OpenShift Container Platform 4.15, administrators can explore the following features added to this release:

Support for version ranges: You can specify a version range by using a comparison string in an Operator or extension’s custom resource (CR). If you specify a version range in the CR, OLM 1.0 installs or updates to the latest version of the Operator that can be resolved within the version range. For more information, see Updating an Operator and Support for version ranges
Performance improvements in the Catalog API: The Catalog API now uses an HTTP service to serve catalog content on the cluster. Previously, custom resource definitions (CRDs) were used for this purpose. The change to using an HTTP service to serve catalog content reduces the load on the Kubernetes API server. For more information, see Finding Operators to install from a catalog.

Note

For OpenShift Container Platform 4.15, documented procedures for OLM 1.0 are CLI-based only. Alternatively, administrators can create and view related objects in the web console by using normal methods, such as the Import YAML and Search pages. However, the existing OperatorHub and Installed Operators pages do not yet display OLM 1.0 components.

For more information, see About Operator Lifecycle Manager 1.0.

Important

Currently, OLM 1.0 supports the installation of Operators and extensions that meet the following criteria:

The Operator or extension must use the AllNamespaces install mode.
The Operator or extension must not use webhooks.

Operators or extensions that use webhooks or that target a single or specified set of namespaces cannot be installed.

1.3.13.2. Deprecation schema for Operator catalogs

The optional olm.deprecations schema defines deprecation information for Operator packages, bundles, and channels in a file-based catalog. Operator authors can use this schema in a deprecations.yaml file to provide relevant messages about their Operators, such as support status and recommended upgrade paths, to users running those Operators from a catalog. After the Operator is installed, any specified messages can be viewed as status conditions on the related Subscription object.

For information on the olm.deprecations schema, see Operator Framework packaging format.

1.3.14. Operator development

1.3.14.1. Token authentication for Operators on cloud providers: Microsoft Entra Workload ID

With this release, Operators managed by Operator Lifecycle Manager (OLM) can support token authentication when running on Azure clusters configured for Microsoft Entra Workload ID. Updates to the Cloud Credential Operator (CCO) enable semi-automated provisioning of certain short-term credentials, provided that the Operator author has enabled their Operator to support Microsoft Entra Workload ID.

For more information, see CCO-based workflow for OLM-managed Operators with Azure AD Workload Identity.

1.3.15. Builds

1.3.16. Machine Config Operator

1.3.16.1. Improved MCO state reporting by node (Technology Preview)

With this release, you can monitor updates for individual nodes as a Technology Preview. For more information, see Checking machine config node status.

1.3.17. Machine API

1.3.17.1. Defining a VMware vSphere failure domain for a control plane machine set (Technology Preview)

By using a vSphere failure domain resource, you can use a control plane machine set to deploy control plane machines on hardware that is separate from the primary VMware vSphere infrastructure. A control plane machine set helps balance control plane machines across defined failure domains to provide fault tolerance capabilities to your infrastructure.

For more information, see Sample VMware vSphere failure domain configuration and Supported cloud providers.

1.3.18. Nodes

1.3.18.1. The /dev/fuse device enables faster builds on unprivileged pods

You can configure unprivileged pods with the /dev/fuse device to access faster builds.

For more information, see Accessing faster builds with /dev/fuse.

1.3.18.2. Log linking is enabled by default

Beginning with OpenShift Container Platform 4.15, log linking is enabled by default. Log linking gives you access to the container logs for your pods.

1.3.18.3. ICSP, IDMS, and ITMS are now compatible

ImageContentSourcePolicy (ICSP), ImageDigestMirrorSet (IDMS), and ImageTagMirrorSet (ITMS) objects now function in the same cluster at the same time. Previously, to use the newer IDMS or ITMS objects, you needed to delete any ICSP objects. Now, you can use any or all of the three types of objects to configure repository mirroring after the cluster is installed. For more information, see Understanding image registry repository mirroring.

Important

Using an ICSP object to configure repository mirroring is a deprecated feature. Deprecated functionality is still included in OpenShift Container Platform and continues to be supported. However, it might be removed in a future release of this product. Because it is deprecated functionality, avoid using it for new deployments.

1.3.19. Monitoring

The in-cluster monitoring stack for this release includes the following new and modified features.

1.3.19.1. Updates to monitoring stack components and dependencies

This release includes the following version updates for in-cluster monitoring stack components and dependencies:

Alertmanager to 0.26.0
kube-state-metrics to 2.10.1
node-exporter to 1.7.0
Prometheus to 2.48.0
Prometheus Adapter to 0.11.2
Prometheus Operator to 0.70.0
Thanos Querier to 0.32.5

1.3.19.2. Changes to alerting rules

Note

Red Hat does not guarantee backward compatibility for recording rules or alerting rules.

The NodeClockNotSynchronising and NodeClockSkewDetected alerting rules are now disabled when the Precision Time Protocol (PTP) is in use.

1.3.19.3. New Metrics Server component to access the Metrics API (Technology Preview)

This release introduces a Technology Preview option to add a Metrics Server component to the in-cluster monitoring stack. As a Technology Preview feature, Metrics Server is automatically installed instead of Prometheus Adapter if the FeatureGate custom resource is configured with the TechPreviewNoUpgrade option. If installed, Metrics Server collects resource metrics and exposes them in the metrics.k8s.io Metrics API service for use by other tools and APIs. Using Metrics Server instead of Prometheus Adapter frees the core platform Prometheus stack from handling this functionality. For more information, see MetricsServerConfig in the config map API reference for the Cluster Monitoring Operator and Enabling features using feature gates.

1.3.19.4. New feature to send exemplar data to remote write storage for user-defined projects

User-defined projects can now use remote write to send exemplar data scraped by Prometheus to remote storage. To use this feature, configure remote write using the sendExemplars option in the RemoteWriteSpec resource. For more information, see RemoteWriteSpec in the config map API reference for the Cluster Monitoring Operator.

1.3.19.5. Improved alert querying for user-defined projects

Applications in user-defined projects now have API access to query alerts for application namespaces via the rules tenancy port for Thanos Querier. You can now construct queries that access the /api/v1/alerts endpoint via port 9093 for Thanos Querier, provided that the HTTP request contains a namespace parameter. In previous releases, the rules tenancy port for Thanos Querier did not provide API access to the /api/v1/alerts endpoint.

1.3.19.6. Prometheus updated to tolerate jitters at scrape time

The default Prometheus configuration in the monitoring stack has been updated so that jitters are tolerated at scrape time. For monitoring deployments that have shown sub-optimal chunk compression for data storage, this update helps to optimize data compression, thereby reducing the disk space used by the time series database in these deployments.

1.3.19.7. Improved staleness handling for the kubelet service monitor

Staleness handling for the kubelet service monitor has been improved to ensure that alerts and time aggregations are accurate. This improved functionality is active by default and makes the dedicated service monitors feature obsolete. As a result, the dedicated service monitors feature has been disabled and is now deprecated, and setting the DedicatedServiceMonitors resource to enabled has no effect.

1.3.19.8. Improved ability to troubleshoot reports of tasks failing

The reasons provided when tasks fail in monitoring components are now more granular so that you can more easily pinpoint whether a reported failure originated in components deployed in the openshift-monitoring namespace or in the openshift-user-workload-monitoring namespace. If the Cluster Monitoring Operator (CMO) reports task failures, the following reasons have been added to identify where the failures originated:

The PlatformTasksFailed reason indicates failures that originated in the openshift-monitoring namespace.
The UserWorkloadTasksFailed reason indicates failures that originated in the openshift-user-workload-monitoring namespace.

1.3.20. Network Observability Operator

The Network Observability Operator releases updates independently from the OpenShift Container Platform minor version release stream. Updates are available through a single, Rolling Stream which is supported on all currently supported versions of OpenShift Container Platform 4. Information regarding new features, enhancements, and bug fixes for the Network Observability Operator is found in the Network Observability release notes.

1.3.21. Scalability and performance

You can set the control plane hardware speed to one of "Standard", "Slower", or the default, "", which allows the system to decide which speed to use. This is a Technology Preview feature. For more information, see Setting tuning parameters for etcd.

1.3.21.1. Hub-side templating for PolicyGenTemplate CRs

You can manage the configuration of fleets of clusters by using hub templates to populate the group and site values in the generated policies that get applied to managed clusters. By using hub templates in group and site PolicyGenTemplate (PGT) CRs you can significantly reduce the number of policies on the hub cluster. For more information, see Specifying group and site configuration in group PolicyGenTemplate CRs with hub templates.

1.3.21.2. Node Tuning Operator (NTO)

The Cloud-native Network Functions (CNF) tests image for latency tests, cnf-tests, has been simplified. The new image has three tests for latency measurements. The tests run by default and require a performance profile configured on the cluster. If no performance profile is configured, the tests do not run.

The following variables are no longer recommended for use:

ROLE_WORKER_CNF
NODES_SELECTOR
PERF_TEST_PROFILE
FEATURES
LATENCY_TEST_RUN
DISCOVERY_MODE

To generate the junit report, the --ginkgo.junit-report flag replaces --junit.

For more information, see Performing latency tests for platform verification.

1.3.21.3. Bare Metal Operator

For OpenShift Container Platform 4.15, when the Bare Metal Operator removes a host from the cluster it also powers off the host. This enhancement streamlines hardware maintenance and management.

1.3.22. Hosted control planes

1.3.22.1. Configuring hosted control plane clusters by using non-bare metal agent machines (Technology Preview)

With this release, you can provision a hosted control plane cluster by using non-bare metal agent machines. For more information, see Configuring hosted control plane clusters using non-bare metal agent machines (Technology Preview).

1.3.22.2. Creating a hosted cluster by using the OpenShift Container Platform console

With this release, you can now create a hosted cluster with the KubeVirt platform by using the OpenShift Container Platform console. The multicluster engine for Kubernetes Operator (MCE) enables the hosted cluster view. For more information, see Creating a hosted cluster by using the console.

1.3.22.3. Configuring additional networks, guaranteed CPUs, and VM scheduling for node pools

With this release, you can now configure additional networks, request a guaranteed CPU access for Virtual Machines (VMs), and manage scheduling of KubeVirt VMs for node pools. For more information, see Configuring additional networks, guaranteed CPUs, and VM scheduling for node pools.

1.4. Notable technical changes

OpenShift Container Platform 4.15 introduces the following notable technical changes.

Cluster metrics ports secured

With this release, the ports that serve metrics for the Cluster Machine Approver Operator and Cluster Cloud Controller Manager Operator use the Transport Layer Security (TLS) protocol for additional security. (OCPCLOUD-2272, OCPCLOUD-2271)

Cloud controller manager for Google Cloud Platform

The Kubernetes community plans to deprecate the use of the Kubernetes controller manager to interact with underlying cloud platforms in favor of using cloud controller managers. As a result, there is no plan to add Kubernetes controller manager support for any new cloud platforms.

This release introduces the General Availability of using a cloud controller manager for Google Cloud Platform.

To learn more about the cloud controller manager, see the Kubernetes Cloud Controller Manager documentation.

To manage the cloud controller manager and cloud node manager deployments and lifecycles, use the Cluster Cloud Controller Manager Operator.

For more information, see the Cluster Cloud Controller Manager Operator entry in the Cluster Operators reference.

Future restricted enforcement for pod security admission

Currently, pod security violations are shown as warnings in the audit logs without resulting in the rejection of the pod.

Global restricted enforcement for pod security admission is currently planned for the next minor release of OpenShift Container Platform. When this restricted enforcement is enabled, pods with pod security violations will be rejected.

To prepare for this upcoming change, ensure that your workloads match the pod security admission profile that applies to them. Workloads that are not configured according to the enforced security standards defined globally or at the namespace level will be rejected. The restricted-v2 SCC admits workloads according to the Restricted Kubernetes definition.

If you are receiving pod security violations, see the following resources:

See Identifying pod security violations for information about how to find which workloads are causing pod security violations.
See About pod security admission synchronization to understand when pod security admission label synchronization is performed. Pod security admission labels are not synchronized in certain situations, such as the following situations:
- The workload is running in a system-created namespace that is prefixed with openshift-.
- The workload is running on a pod that was created directly without a pod controller.
If necessary, you can set a custom admission profile on the namespace or pod by setting the pod-security.kubernetes.io/enforce label.

Secrets are no longer automatically generated when the integrated OpenShift image registry is disabled

If you disable the ImageRegistry cluster capability or if you disable the integrated OpenShift image registry in the Cluster Image Registry Operator’s configuration, a service account token secret and image pull secret are no longer generated for each service account.

For more information, see Automatically generated secrets.

Open Virtual Network Infrastructure Controller default range

Previously, the IP address range 168.254.0.0/16 was the default IP address range that the Open Virtual Network Infrastructure Controller used for the transit switch subnet. With this update, the Controller uses 100.88.0.0/16 as the default IP address range. Do not use this IP range in your production infrastructure network. (OCPBUGS-20178)

Introduction of HAProxy no strict-limits variable

The transition to HAProxy 2.6 included enforcement for the strict-limits configuration, which resulted in unrecoverable errors when maxConnections requirements could not be met. The strict-limits setting is not configurable by end users and remains under the control of the HAProxy template.

This release introduces a configuration adjustment in response to the migration to the maxConnections issues. Now, the HAProxy configuration switches to using no strict-limits. As a result, HAProxy no longer fatally exits when the maxConnection configuration cannot be satisfied. Instead, it emits warnings and continues running. When maxConnection limitations cannot be met, warnings such as the following examples might be returned:

[WARNING] (50) : [/usr/sbin/haproxy.main()] Cannot raise FD limit to 4000237, limit is 1048576.
[ALERT] (50) : [/usr/sbin/haproxy.main()] FD limit (1048576) too low for maxconn=2000000/maxsock=4000237. Please raise 'ulimit-n' to 4000237 or more to avoid any trouble.

To resolve these warnings, we recommend specifying -1 or auto for the maxConnections field when tuning an IngressController. This choice allows HAProxy to dynamically calculate the maximum value based on the available resource limitations in the running container, which eliminates these warnings. (OCPBUGS-21803)

The deployer service account is no longer created if the DeploymentConfig cluster capability is disabled

If you disable the DeploymentConfig cluster capability, the deployer service account and its corresponding secrets are no longer created.

For more information, see DeploymentConfig capability.

Must-gather storage limit default

A default limit of 30% of the storage capacity of the node for the container has been added for data collected by the oc adm must-gather command. If necessary, you can use the --volume-percentage flag to adjust the default storage limit.

For more information, see Changing the must-gather storage limit.

Agent-based Installer interactive network configuration displays on the serial console

With this update, when an Agent ISO is booted on a server with no graphical console, interactive network configuration is possible on the serial console. Status displays are paused on all other consoles while the interactive network configuration is active. Previously, the displays could be shown only on a graphical console. (OCPBUGS-19688)

1.5. Deprecated and removed features

Some features available in previous releases have been deprecated or removed.

Deprecated functionality is still included in OpenShift Container Platform and continues to be supported; however, it will be removed in a future release of this product and is not recommended for new deployments. For the most recent list of major functionality deprecated and removed within OpenShift Container Platform 4.15, refer to the table below. Additional details for more functionality that has been deprecated and removed are listed after the table.

In the following tables, features are marked with the following statuses:

General Availability
Deprecated
Removed

Operator lifecycle and development deprecated and removed features

Table 1.6. Operator lifecycle and development deprecated and removed tracker
Feature	4.13	4.14	4.15
SQLite database format for Operator catalogs	Deprecated	Deprecated	Deprecated

Images deprecated and removed features

Table 1.7. Images deprecated and removed tracker
Feature	4.13	4.14	4.15
`ImageChangesInProgress` condition for Cluster Samples Operator	Deprecated	Deprecated	Deprecated
`MigrationInProgress` condition for Cluster Samples Operator	Deprecated	Deprecated	Deprecated

Monitoring deprecated and removed features

Table 1.8. Monitoring deprecated and removed tracker
Feature	4.13	4.14	4.15
`dedicatedServiceMonitors` setting that enables dedicated service monitors for core platform monitoring	General Availability	General Availability	Deprecated
`prometheus-adapter` component that queries resource metrics from Prometheus and exposes them in the metrics API.	General Availability	General Availability	Deprecated

Installation deprecated and removed features

Table 1.9. Installation deprecated and removed tracker
Feature	4.13	4.14	4.15
OpenShift SDN network plugin	General Availability	Deprecated	Removed ^[1]
`--cloud` parameter for `oc adm release extract`	General Availability	Deprecated	Deprecated
CoreDNS wildcard queries for the `cluster.local` domain	Removed	Removed	Removed
`compute.platform.openstack.rootVolume.type` for RHOSP	General Availability	Deprecated	Deprecated
`controlPlane.platform.openstack.rootVolume.type` for RHOSP	General Availability	Deprecated	Deprecated
`ingressVIP` and `apiVIP` settings in the `install-config.yaml` file for installer-provisioned infrastructure clusters	Deprecated	Deprecated	Deprecated
`platform.gcp.licenses` for Google Cloud Provider	Deprecated	Removed	Removed

While the OpenShift SDN network plugin is no longer supported by the installation program in version 4.15, you can upgrade a cluster that uses the OpenShift SDN plugin from version 4.14 to version 4.15.

Storage deprecated and removed features

Table 1.10. Storage deprecated and removed tracker
Feature	4.13	4.14	4.15
Persistent storage using FlexVolume	Deprecated	Deprecated	Deprecated

Networking deprecated and removed features

Table 1.11. Networking deprecated and removed tracker
Feature	4.13	4.14	4.15
Kuryr on RHOSP	Deprecated	Deprecated	Removed
OpenShift SDN network plugin	General Availability	Deprecated	Deprecated

Building applications deprecated and removed features

Table 1.12. Service Binding Operator deprecated and removed tracker
Feature	4.13	4.14	4.15
Service Binding Operator	Deprecated	Deprecated	Deprecated

Node deprecated and removed features

Table 1.13. Node deprecated and removed tracker
Feature	4.13	4.14	4.15
`ImageContentSourcePolicy` (ICSP) objects	Deprecated	Deprecated	Deprecated
Kubernetes topology label `failure-domain.beta.kubernetes.io/zone`	Deprecated	Deprecated	Deprecated
Kubernetes topology label `failure-domain.beta.kubernetes.io/region`	Deprecated	Deprecated	Deprecated

OpenShift CLI (oc) deprecated and removed features

Feature	4.13	4.14	4.15
`--include-local-oci-catalogs` parameter for `oc-mirror`	General Availability	Removed	Removed
`--use-oci-feature` parameter for `oc-mirror`	Deprecated	Removed	Removed

Workloads deprecated and removed features

Table 1.14. Workloads deprecated and removed tracker
Feature	4.13	4.14	4.15
`DeploymentConfig` objects	General Availability	Deprecated	Deprecated

Bare metal monitoring

Table 1.15. Bare Metal Event Relay Operator tracker
Feature	4.13	4.14	4.15
Bare Metal Event Relay Operator	Technology Preview	Technology Preview	Deprecated

1.5.1. Deprecated features

1.5.1.1. Deprecation of the OpenShift SDN network plugin

OpenShift SDN CNI is deprecated as of OpenShift Container Platform 4.14. As of OpenShift Container Platform 4.15, the network plugin is not an option for new installations. In a subsequent future release, the OpenShift SDN network plugin is planned to be removed and no longer supported. Red Hat will provide bug fixes and support for this feature until it is removed, but this feature will no longer receive enhancements. As an alternative to OpenShift SDN CNI, you can use OVN Kubernetes CNI instead.

1.5.1.2. Bare Metal Event Relay Operator

The Bare Metal Event Relay Operator is deprecated. The ability to monitor bare-metal hosts by using the Bare Metal Event Relay Operator will be removed in a future OpenShift Container Platform release.

1.5.1.3. Service Binding Operator

The Service Binding Operator is deprecated and will be removed with the OpenShift Container Platform 4.16 release. Red Hat will provide critical bug fixes and support for this component during the current release lifecycle, but this component will no longer receive feature enhancements.

1.5.1.4. Dedicated service monitors for core platform monitoring

With this release, the dedicated service monitors feature for core platform monitoring is deprecated. The ability to enable dedicated service monitors by configuring the dedicatedServiceMonitors setting in the cluster-monitoring-config config map object in the openshift-monitoring namespace will be removed in a future OpenShift Container Platform release. To replace this feature, Prometheus functionality has been improved to ensure that alerts and time aggregations are accurate. This improved functionality is active by default and makes the dedicated service monitors feature obsolete.

1.5.1.5. Prometheus Adapter for core platform monitoring

With this release, the Prometheus Adapter component for core platform monitoring is deprecated and is planned to be removed in a future release. Red Hat will provide bug fixes and support for this component during the current release lifecycle, but this component will no longer receive enhancements and will be removed. As a replacement, a new Metrics Server component has been added to the monitoring stack. Metrics Server is a simpler and more lightweight solution because it does not rely on Prometheus for its functionality. Metrics Server also ensures scalability and a more accurate tracking of resource metrics. With this release, the improved functionality of Metrics Server is available by default if you enable the TechPreviewNoUpgrade option in the FeatureGate custom resource.

1.5.1.6. oc registry info command is deprecated

With this release, the experimental oc registry info command is deprecated.

To view information about the integrated OpenShift image registry, run oc get imagestream -n openshift and check the IMAGE REPOSITORY column.

1.5.2. Removed features

1.5.2.1. Removal of the OPENSHIFT_DEFAULT_REGISTRY

OpenShift Container Platform 4.15 has removed support for the OPENSHIFT_DEFAULT_REGISTRY variable. This variable was primarily used to enable backwards compatibility of the internal image registry for earlier setups. The REGISTRY_OPENSHIFT_SERVER_ADDR variable can be used in its place.

1.5.2.2. Installing clusters on Red Hat OpenStack Platform (RHOSP) with Kuryr is removed

As of OpenShift Container Platform 4.15, support for installing clusters on RHOSP with kuryr is removed.

1.5.3. Future Kubernetes API removals

The next minor release of OpenShift Container Platform is expected to use Kubernetes 1.29. Kubernetes 1.29 has removed a deprecated API.

See the Deprecated API Migration Guide in the upstream Kubernetes documentation for the list of Kubernetes API removals.

See Navigating Kubernetes API deprecations and removals for information about how to check your cluster for Kubernetes APIs that are planned for removal.

1.6. Bug fixes

API Server and Authentication

Previously, the termination.log in the kube-apiserver log folder had invalid permissions due to settings in the upstream library. With this release, the upstream library was updated and the terminate.log now has the expected permissions. (OCPBUGS-11856)
Previously, the Cluster Version Operator (CVO) enabled a capability if the existing manifest got the capability annotation after an upgrade. This caused the console to be enabled after upgrading to OpenShift Container Platform 4.14 for users who had previously disabled the console capability. With this release, the unnecessary console capability was removed from the existing manifest and the console capability is no longer implicitly enabled. (OCPBUGS-20331)
Previously, when the openshift-kube-controller-manager namespace was deleted, the following error was logged repeatedly: failed to synchronize namespace. With this release, the error is no longer logged when the openshift-kube-controller-manager namespace is deleted. (OCPBUGS-17458)

Bare Metal Hardware Provisioning

Previously, deploying IPv6-only hosts from a dual-stack GitOps ZTP hub prevented the correct callback URL from being passed to the baseboard management controller (BMC). Consequently, an IPv4 URL was passed unconditionally. This issue has been resolved, and the IP version of the URL now depends on the IP version of the BMC address. (OCPBUGS-23759)
Previously, the Bare Metal Operator (BMO) container had a hostPort specified as 60000, but the hostPort was not actually in use despite the specification. As a result, other services could not use port 60000. This fix removes the hostPort specification from the container configuration. Now, port 60000 is available for use by other services. (OCPBUGS-18788)
Previously, the Cluster Baremetal Operator (CBO) failed when it checked the infrastructure platformStatus field and returned nil. With OpenShift Container Platform 4.15, the CBO has been updated so that it checks and returns a blank value when apiServerInternalIPs returns nil, which resolves this issue. (OCPBUGS-17589)
Previously, the inspector.ipxe configuration used the IRONIC_IP variable, which did not account for IPv6 addresses because they have brackets. Consequently, when the user supplied an incorrect boot_mac_address, iPXE fell back to the inspector.ipxe configuration, which supplied a malformed IPv6 host header since it did not contain brackets.
With OpenShift Container Platform 4.15, the inspector.ipxe configuration has been updated to use the IRONIC_URL_HOST variable, which accounts for IPv6 addresses and resolves the issue. (OCPBUGS-27060)
Previously, there was a bug when attempting to deploy OpenShift Container Platform on a new bare metal host using RedFish Virtual Media with Cisco UCS hardware. This bug blocked bare metal hosts from new provisions, because Ironic was unable to find a suitable virtual media device. With this update, Ironic does more checks in all available virtual media devices. As a result, Cisco UCS hardware can now be provisioned when using RedFish Virtual Media. (OCPBUGS-23105)
Previously, when installing OpenShift Container Platform with the bootMode field set to UEFISecureBoot on a node where the secureBoot field was set to disabled, the installation program failed to start. With this update, Ironic has been updated so that you can install OpenShift Container Platform with secureBoot set to enabled. (OCPBUGS-9303)

Builds

Previously, timestamps were not preserved when copying contents between containers. With this release, the -p flag is added to the cp command to allow timestamps to be preserved. (OCPBUGS-22497)

Cloud Compute

Previously, an error in the parsing of taints from the MachineSet spec meant that the autoscaler could not account for any taint set directly on the spec. Consequently, when relying on the MachineSet taints for scaling from zero, the taints from the spec were not considered, which could cause incorrect scaling decisions. With this update, parsing issues within the scale from zero logic have been resolved. As a result, auto scaler can now scale up correctly and identify taints that would prevent workloads from scheduling. (OCPBUGS-27750)
Previously, an Amazon Web Services (AWS) code that provided image credentials was removed from the kubelet in OpenShift Container Platform 4.14. Consequently, pulling images from Amazon Elastic Container Registry (ECR) failed without a specified pull secret, because the kubelet could no longer authenticate itself and pass credentials to the container runtime. With this update, a separate credential provider has been configured, which is now responsible for providing ECR credentials for the kubelet. As a result, the kubelet can now pull private images from ECR. (OCPBUGS-27486)
Previously when deploying a hosted control plane (HCP) KubeVirt cluster the --node-selector command, the node selector was not applied to the kubevirt-cloud-controller-manager pods within the HCP namespace. Consequentially, you could not pin the entire HCP pods to specific nodes. With this update, this issue has been fixed. (OCPBUGS-27071)
Previously, the default virtual machine (VM) type for the Microsoft Azure load balancer was changed from Standard to VMSS. Consequently, the service type load balancer could not attach standard VMs to load balancers. This update reverts these changes to the previous configuration to maintain compatibility with OpenShift Container Platform deployments. As a result, load balancer attachments are now more consistent. (OCPBUGS-26210)
Previously, deployments on RHOSP nodes with additional ports with the enable_port_security field set to false were prevented from creating LoadBalancer services. With this update, this issue is resolved. (OCPBUGS-22246)
Previously worker nodes on Red Hat OpenStack Platform (RHOSP) were named with domain components if the Nova metadata service was unavailable the first time the worker nodes booted. OpenShift Container Platform expects the node names to be the same as the Nova instance. The name discrepancy caused the nodes' certificate request to be rejected and the nodes could not join the cluster. With this update, the worker nodes will wait and retry the metadata service indefinitely on first boot ensuring the nodes are correctly named. (OCPBUGS-22200)
Previously, the cluster autoscaler crashed when used with nodes that have Container Storage Interface (CSI) storage. The issue is resolved in this release. (OCPBUGS-23096)
Previously, in certain proxied environments, the Amazon Web Services (AWS) metadata service might not have been present on initial startup, and might have only been available shortly after startup. The kubelet hostname fetching did not account for this delay and, consequently, the node would fail to boot because it would not have a valid hostname. This update ensures that the hostname fetching script retries on failure for some time. As a result, inaccessibility of the metadata service is tolerated for a short period of time. (OCPBUGS-20369)
In OpenShift Container Platform version 4.14 and later, there is a known issue that causes installation of Microsoft Azure Stack Hub to fail. Microsoft Azure Stack Hub clusters that are upgraded to 4.14 or later might encounter load balancer configuration issues as nodes scale up or down. Installing or upgrading to 4.14 in Microsoft Azure Stack Hub environments is not recommended until this issue is resolved. (OCPBUGS-20213)
Previously, some conditions during the startup process of the Cluster Autoscaler Operator caused a lock that prevented the Operator from successfully starting and marking itself available. As a result, the cluster became degraded. The issue is resolved with this release. (OCPBUGS-18954)
Previously, attempting to perform a Google Cloud Platform XPN internal cluster installation failed when control nodes were added to a second internal instance group. This bug has been fixed. (OCPBUGS-5755)
Previously, the termination handler prematurely exited before marking a node for termination. This condition occurred based on the timing of when the termination signal was received by the controller. With this release, the possibility of early termination is accounted for by introducing an additional check for termination. (OCPBUGS-2117)
Previously, when the Build cluster capability was not enabled, the cluster version Operator (CVO) failed to synchronize the build informer, and did not start successfully. With this release, the CVO successfully starts when the Build capability is not enabled. (OCPBUGS-22956)

Cloud Credential Operator

Previously, the Cloud Credential Operator utility (ccoctl) created custom GCP roles at the cluster level, so each cluster contributed to the quota limit on the number of allowed custom roles. Because of GCP deletion policies, deleted custom roles continue to contribute to the quota limit for many days after they are deleted. With this release, custom roles are added at the project level instead of the cluster level to reduce the total number of custom roles created. Additionally, an option to clean up custom roles is now available when deleting the GCP resources that the ccoctl utility creates during installation. These changes can help avoid reaching the quota limit on the number of allowed custom roles. (OCPBUGS-28850)
Previously, when the Build cluster capability was not enabled, the Cluster Version Operator (CVO) failed to synchronize the build informer and did not start successfully. With this release, the CVO successfully starts when the Build capability is not enabled. (OCPBUGS-26510)
Previously, buckets created by running the ccoctl azure create command were prohibited from allowing public blob access due to a change in the default behavior of Microsoft Azure buckets. With this release, buckets created by running the ccoctl azure create command are explicitly set to allow public blob access. (OCPBUGS-22369)
Previously, an Azure Managed Identity role was omitted from the Cloud Controller Manager service account. As a result, the Cloud Controller Manager could not manage service type load balancers in environments deployed to existing VNets with a private publishing method. With this release, the missing role was added to the Cloud Credential Operator utility (ccoctl) and Azure Managed Identity installations into an existing VNet with private publishing is possible. (OCPBUGS-21745)
Previously, the Cloud Credential Operator did not support updating the vCenter server value in the root secret vshpere-creds that is stored in the kube-system namespace. As a result, attempting to update this value caused both the old and new values to exist because the component secrets were not synchronized correctly. With this release, the Cloud Credential Operator resets the secret data during synchronization so that updating the vCenter server value is supported. (OCPBUGS-20478)
Previously, the Cloud Credential Operator utility (ccoctl) failed to create AWS Security Token Service (STS) resources in China regions because the China region DNS suffix .amazonaws.com.cn differs from the suffix .amazonaws.com that is used in other regions. With this release, ccoctl can detect the correct DNS suffix and use it to create the required resources. (OCPBUGS-13597)

Cluster Version Operator

The Cluster Version Operator (CVO) continually retrieves update recommendations and evaluates known conditional update risks against the current cluster state. Previously, failing risk evaluations blocked the CVO from fetching new update recommendations. When the risk evaluations were failing because the update recommendation service served a poorly-defined update risk, this issue could prevent the CVO from noticing the update recommendation service serving an improved risk declaration. With this release, the CVO continues to poll the update recommendation service regardless of whether update risks are successfully evaluated or not. (OCPBUGS-25949)

Developer Console

Previously, BuildRun logs were not visible in the Logs Tab of the BuildRun due to the recent update in the API version of the specified resources. With this update, the Logs of the TaskRuns were added back into the Logs tab of the BuildRun for both v1alpha1 and v1beta1 versions of the builds Operator. (OCPBUGS-29283)
Previously, the console UI failed when a Task in the Pipeline Builder that was previously installed from the ArtifactHub was selected and an error page displayed. With this update, the console UI no longer expects optional data and the console UI no longer fails. (OCPBUGS-24001)
Previously, the Edit Build and BuildRun options in the Actions menu of the Shipwright Plugin did not allow you to edit in the YAML tab. With this update, you can edit in the YAML tab. (OCPBUGS-23164)
Previously, the console searched only for the file name Dockerfile in a repository to identify the repository suitable for the Container strategy in the Import Flows. Since other containerization tools are available, support for the Containerfile file name is now suitable for the Container strategy. (OCPBUGS-22976)
Previously, when an unauthorized user opened a link to the console that contains path and query parameters, and they were redirected to a login page, the query parameters did not restore after the login was successful. As a result, the user needed to restore the search or click the link to the console again. With this update, the latest version saves and restores the query parameters similar to the path. (OCPBUGS-22199)
Previously, when navigating to the Create Channel page from the Add or Topology view, the default name as Channel is present, but the Create button is disabled with Required showing under the name field. With this update, if the default channel name is added then the Required message will not display when clicking the Create button. (OCPBUGS-19783)
Previously, there were similar options to choose from when using the quick search function. With this update, the Source-to-image option is differentiated from the Samples option in the Topology quick search. (OCPBUGS-18371)
Previously, when {serverless-product-name} Operator was installed and the Knative (Kn) serving instance had not been created, then when navigating to the Global configuration page from Administration Cluster Settings and clicking Knative-serving a 404 page not found error was displayed. With this update, before adding Knative-serving to the Global configuration, a check is in place to determine if a Knative serving instance is created. (OCPBUGS-18267)
Previously there was an issue with the Edit Knative Service form that prevented users from editing the Knative service they previously created. With this update, you can edit a Knative service that was previously created. (OCPBUGS-6513)

etcd Cluster Operator

Previously, the cluster-backup.sh script cached the etcdctl binary on the local machine indefinitely, making updates impossible. With this update, the cluster-backup.sh script pulls the latest etcdctl binary each time it is run. (OCPBUGS-19052)

Hosted Control Plane

Previously, when using a custom Container Network Interface (CNI) plugin in a hosted cluster, role-based access control (RBAC) rules were configured only when you set the hostedcluster.spec.networking.networkType field to Calico. Role-based access control (RBAC) rules were not configured when you set the hostedcluster.spec.networking.networkType field to Other. With this release, RBAC rules are configured properly, when you set the hostedcluster.spec.networking.networkType field to Other. (OCPBUGS-28235)
Previously, a node port failed to expose properly because the ipFamilyPolicy field was set to SingleStack for the kube-apiserver resource. With this update, if the ipFamilyPolicy is set to PreferredDualStack, node port is exposed properly. (OCPBUGS-23350)
Previously, after configuring the Open Virtual Network (OVN) for a hosted cluster, the cloud-network-config-controller, multus-admission-controller, and`ovnkube-control-plane` resources were missing the hypershift.openshift.io/hosted-control-plane:{hostedcluster resource namespace}-{cluster-name} label. With this update, after configuring the Open Virtual Network (OVN) for a hosted cluster, the cloud-network-config-controller, multus-admission-controller, and`ovnkube-control-plane` resources contain the hypershift.openshift.io/hosted-control-plane:{hostedcluster resource namespace}-{cluster-name} label. (OCPBUGS-19370)
Previously, after creating a hosted cluster, to create a config map, if you used a name other than user-ca-bundle, the deployment if the Control Plane Operator (CPO) failed. With this update, you can use unique names to create a config map. The CPO is deployed successfully. (OCPBUGS-19419)
Previously, hosted clusters with .status.controlPlaneEndpoint.port: 443 would mistakenly expose port 6443 for public and private routers. With this update, hosted clusters with .status.controlPlaneEndpoint.port: 443 only expose the port 443. (OCPBUGS-20161)
Previously, if the Kube API server is exposed by using IPv4 and IPv6, and the IP address is set in the HostedCluster resource, the IPv6 environment did not work properly. With this update, when the Kube API server is exposed by using IPv4 and IPv6, the IPv6 environment works properly. (OCPBUGS-20246)
Previously, if the console Operator and Ingress pods were located on the same node, the console Operator would fail and mark the console cluster Operator as unavailable. With this release, if the console Operator and Ingress pods are located on the same node, the console Operator no longer fails. (OCPBUGS-23300)
Previously, if uninstallation of a hosted cluster is stuck, status of the Control Plane Operator (CPO) was reported incorrectly. With this update, the status of the CPO is reported correctly. (OCPBUGS-26412)
Previously, if you tried to override the OpenShift Container Platform version while the initial upgrade was in progress, a hosted cluster upgrade would fail. With this update, if you override the current upgrade with a new OpenShift Container Platform version, the upgrade completes successfully. (OCPBUGS-18122)
Previously, if you update the pull secret for the hosted control planes, it did not reflect on the worker nodes immediately. With this update, when you change the pull secret, reconciliation is triggered and worker nodes are updated with a new pull secret immediately. (OCPBUGS-19834)
Previously, the Hypershift Operator would report time series for node pools that no longer existed. With this release, the Hypershift Operator reports time series for node pools correctly. (OCPBUGS-20179)
Previously, the --enable-uwm-telemetry-remote-write flag was enabled by default. This setting blocked the telemetry reconciliation. With this update, you can disable the --enable-uwm-telemetry-remote-write flag to allow telemetry reconciliation. (OCPBUGS-26410)
Previously, the control Plane Operator (CPO) failed to update the VPC endpoint service when an IAM role path ARN was provided as the additional allowed principal: arn:aws:iam::${ACCOUNT_ID}:role/${PATH}/name With this update, The CPO updates the VPC endpoint service with the arn:aws:iam::${ACCOUNT_ID}:role/${PATH}/name allowed principal successfully. (OCPBUGS-23511)
Previously, to customize OAuth templates, if you configured the HostedCluster.spec.configuration.oauth field, this setting did not reflect in a hosted cluster. With this update, you can configure the HostedCluster.spec.configuration.oauth field in a hosted cluster successfully. (OCPBUGS-15215)
Previously, when deploying a hosted cluster by using a dual stack networking, by default, the clusterIP field was set to an IPv6 network instead of an IPv4 network. With this update, when deploying a hosted cluster by using a dual stack networking, the clusterIP field is set to IPv4 network by default. (OCPBUGS-16189)
Previously, when deploying a hosted cluster, if you configure the advertiseAddress field in the HostedCluster resource, the hosted cluster deployment would fail. With this release, you can deploy a hosted cluster successfully after configuring the advertiseAddress field in the HostedCluster resource. (OCPBUGS-19746)
Previously, when you set the hostedcluster.spec.networking.networkType field to Calico in a hosted cluster, the Cluster Network Operator did not have enough role-based access control (RBAC) permissions to deploy the network-node-identity resource. With this update, the network-node-identity resource is deployed successfully. (OCPBUGS-23083)
Previously, you could not update the default configuration for audit logs in a hosted cluster. Therefore, components of a hosted cluster could not generate audit logs. With this update, you can generate audit logs for components of a hosted cluster by updating the default configuration. (OCPBUGS-13348)

Image Registry

Previously, the Image Registry pruner relied on a cluster role that was managed by the OpenShift API server. This could cause the pruner job to intermittently fail during an upgrade. Now, the Image Registry Operator is responsible for creating the pruner cluster role, which resolves the issue. (OCPBUGS-18969)
The Image Registry Operator makes API calls to the storage account list endpoint as part of obtaining access keys. In projects with several OpenShift Container Platform clusters, this might lead to API limits being reached. As a result, 429 errors were returned when attempting to create new clusters. With this update, the time between calls has been increased from 5 minutes to 20 minutes, and API limits are no longer reached. (OCPBUGS-18469)
Previously, the default low settings for QPS and Burst caused the image registry to return with a gateway timeout error when API server requests were not returned in an appropriate time. To resolve this issue, users had to restart the image registry. With this update, the default settings for QPS and Burst have been increased, and this issue no longer occurs. (OCPBUGS-18999)
Previously, when creating the deployment resource for the Cluster Image Registry Operator, error handling used a pointer variable without checking if the value was nil first. Consequently, when the pointer value was nil, a panic was reported in the logs. With this update, a nil check was added so that the panic is no longer reported in the logs. (OCPBUGS-18103)
Previously, the OpenShift Container Platform 4.14 release introduced a change that gave users the perception that their images were lost when updating from OpenShift Container Platform version 4.13 to 4.14. A change to the default internal registry caused the registry to use an incorrect path when using the Microsoft Azure object storage. With this release, the correct path is used and a job has been added to the registry operator that moves any blobs pushed to the registry that used the wrong storage path into the correct storage path, which effectively merges the two distinct storage paths into a single path.
Note
This fix does not work on Azure Stack Hub (ASH). ASH users who used OCP versions 4.14.0 through 4.14.13 when upgrading to 4.14.14+ will need to execute manual steps to move their blobs to the correct storage path.
(OCPBUGS-29525)

Installer

Previously, installing a cluster on AWS might fail in some cases due to a validation error. With this update, the installation program produces the necessary cloud configuration object to satisfy the machine config operator. This results in the installation succeeding. (OCPBUGS-12707)
Previously, installing a cluster on GCP using a service account attached to a VM for authentication might fail due to an internal data validation bug. With this release, the installation program has been updated to correctly validate the authentication parameters when using a service account attached to a VM. (OCPBUGS-19376)
Previously, the vSphere connection configuration interface showed the network name instead of the cluster name in the "vCenter cluster" field. With this update, the "vCenter cluster" field has been updated to display the cluster name. (OCPBUGS-23347)
Previously, when you authenticated with the credentialsMode parameter not set to Manual and you used the gcloud cli tool, the installation program retrieved Google Cloud Platform (GCP) credentials from the osServiceAccount.json file. This operation caused the GCP cluster installation to fail. Now, a validation check scans the install-config.yaml file and prompts you with a message if you did not set credentialsMode to Manual. Note that in Manual mode, you must edit the manifests and provide the credentials. (OCPBUGS-17757)
Previously when you attempted to install an OpenShift Container Platform on VMware vSphere by using installer-provisioned infrastructure, a resource pool object would include a double backslash. This format caused the installation program to generate an incorrect path to network resources that in turn caused the installation operation to fail. After the installation program processed this resource pool object, the program outputted a "network not found" error message. Now, the installation program retrieves the cluster object for the purposes of joining the InventoryPath with the network name so that the program specifies the correct path to the resource pool object. (OCPBUGS-23376)
Previously, after installing an Azure Red Hat OpenShift cluster, some cluster Operators were unavailable. This was the result of one of the cluster’s load balancers not being created as part of the installation process. With this update, the load balancer is correctly created. After installing a cluster, all cluster Operators are available. (OCPBUGS-24191)
Previously, if the VMware vSphere cluster contained an ESXi host that was offline, the installation failed with a "panic: runtime error: invalid memory address or nil pointer dereference" message. With this update, the error message states that the ESXi host is unavailable. (OCPBUGS-20350)
Previously, if you only used the default machine configuration to specify existing AWS security groups when installing a cluster on AWS (platform.aws.defaultMachinePlatform.additonalSecurityGroupsIDs), the security groups were not applied to control plane machines. With this update, existing AWS security groups are correctly applied to control planes when they are specified using the default machine configuration. (OCPBUGS-20525)
Previously, installing a cluster on AWS failed when the specified machine instance type (platform.aws.type) did not support the machine architecture that was specified for control plane or compute machines (controlPlane.architecture and compute.architecture). With this update, the installation program now checks to determine if the machine instance type supports the specified architecture and displays an error message if it does not. (OCPBUGS-26051)
Previously, the installation program did not validate some configuration settings before installing the cluster. This behavior occurred when these settings were only specified in the default machine configuration (platform.azure.defaultMachinePlatform). As a result, the installation would succeed even if the following conditions were met:
- An unsupported machine instance type was specified.
- Additional functionality, such as accelerated networking or the use of Azure ultra disks, was not supported by the specified machine instance type.
With this fix, the installation program now displays an error message that specifies the unsupported configuration. (OCPBUGS-20364)
Previously, when installing an AWS cluster to the Secret Commercial Cloud Services (SC2S) region and specifying existing AWS security groups, the installation failed with an error that stated that the functionality was not available in the region. With this fix, the installation succeeds. (OCPBUGS-18830)
Previously, when you specified Key Management Service (KMS) encryption keys in the kmsKeyARN section of the install-config.yaml configuration file for installing a cluster on Amazon Web Services (AWS), permission roles were not added during the cluster installation operation. With this update, after you specify the keys in the configuration file, an additional set of keys are added to the cluster so that the cluster successfully installs. If you specify the credentialsMode parameter in the configuration file, all KMS encryption keys are ignored. (OCPBUGS-13664)
Previously, Agent-based installations on Oracle® Cloud Infrastructure (OCI) did not show a console displaying installation progress to users, making it more difficult to track installation progress. With this update, Agent-based installations on OCI now display installation progress on the console. (OCPBUGS-19092)
Previously, if static networking was defined in the install-config.yaml or agent-config.yaml files for the Agent-based Installer, and an interface name was over 15 characters long, the network manager did not allow the interface to come up. With this update, interface names longer than 15 characters are truncated and the installation can proceed. (OCPBUGS-18552)
Previously, if the user did not specify the rendezevousIP field in the agent-config.yaml file and hosts were defined in the same file with static network configuration, then the first host was designated as a rendezvous node regardless of its role. This caused the installation to fail. With this update, the Agent-based Installer prioritizes the rendezvous node search by first looking among the hosts with a master role and a static IP defined. If none is found, then a potential candidate is searched for through the hosts that do not have a role defined. Hosts with a static network configuration that are explicitly configured with a worker role are ignored. (OCPBUGS-5471)
Previously, the Agent console application was shown during the boot process of all Agent-based installations, enabling network customizations before proceeding with the installation. Because network configuration is rarely needed during cloud installations, this would unnecessarily slow down installations on Oracle® Cloud Infrastructure (OCI).
With this update, Agent-based installations on OCI no longer show the Agent console application and proceed more quickly. (OCPBUGS-19093)
Previously, the Agent-based Installer enabled an external Cloud Controller Manager (CCM) by default when the platform was defined as external. This prevented users from disabling the external CCM when performing installations on cloud platforms that do not require one. With this update, users are required to enable an external CCM only when performing an Agent-based installation on Oracle® Cloud Infrastructure (OCI). (OCPBUGS-18455)
Previously, the agent wait-for command failed to record logs in the .openshift_install.log file. With this update, logs are recorded in the .openshift_install.log file when you use the agent wait-for command. (OCPBUGS-5728)
Previously, the assisted-service on the bootstrap machine became unavailable after the bootstrap node rebooted, preventing any communication from the assisted-installer-controller. This stopped the assisted-installer-controller from removing uninitialized taints from worker nodes, causing the cluster installation to hang waiting on cluster Operators.
With this update, the assisted-installer-controller can remove the uninitialized taints even if assisted-service becomes unavailable, and the installation can proceed. (OCPBUGS-20049)
Previously, the platform type was erroneously required to be lowercase in the AgentClusterInstall cluster manifest used by the Agent-based Installer. With this update, mixed case values are required, but the original lowercase values are now accepted and correctly translated. (OCPBUGS-19444)
Previously, the manila-csi-driver-controller-metrics service had empty endpoints due to an incorrect name for the app selector. With this release the app selector name is changed to openstack-manila-csi and the issue is fixed. (OCPBUGS-9331)
Previously, the assisted installer removed the uninitialized taints for all vSphere nodes which prevented the vSphere CCM from initializing the nodes properly. This caused the vSphere CSI operator to degrade during the initial cluster installation because the node’s provider ID was missing. With this release, the assisted installer checks if vSphere credentials were provided in the install-config.yaml. If credentials were provided, the OpenShift version is greater or equal to 4.15, and the agent installer was used, the assisted-installer and assisted-installer-controller do not remove the uninitialized taints. This means that the node’s providerID and VM’s UUID are properly set and the vSphere CSI operator is installed. (OCPBUGS-29485)

Kubernetes Controller Manager

Previously, when the maxSurge field was set for a daemon set and the toleration was updated, pods failed to scale down, which resulted in a failed rollout due to a different set of nodes being used for scheduling. With this release, nodes are properly excluded if scheduling constraints are not met, and rollouts can complete successfully. (OCPBUGS-19452)

Machine Config Operator

Previously, a misspelled environment variable prevented a script from detecting that the node.env file was present. This caused the contents of the node.env file to be overwritten after each boot, and the kubelet hostname could not be changed. With this update, the environment variable spelling is corrected and edits to the node.env file persist across reboots. (OCPBUGS-27307)
Previously, the Machine Config Operator allowed user-provided certificate authority updates to be made without requiring a new machine config to trigger. Because the new write method for these updates was missing a newline character, it caused validation errors for the contents of the CA file on-disk and the Machine Config Daemon became degraded. With this release, the CA file contents are fixed, and updates proceed as expected. (OCPBUGS-25424)
Previously, the Machine Config Operator allowed user-provided certificate authority bundle changes to be applied to the cluster without needing a machine config, to prevent disruption. Because of this, the user-ca bundle was not propagating to applications running on the cluster and required a reboot to see the changes take effect. With this update, the MCO now runs the update-ca-trust command and restarts the CRI-O service so that the new CA properly applies. (OCPBUGS-24035)
Previously, the initial mechanism used by the Machine Config Operator to handle image registry certs would delete and create new config maps rather than patching existing ones. This caused a significant increase in API usage from the MCO. With this update, the mechanism has been updated so that it uses a JSON patch instead, thereby resolving the issue. (OCPBUGS-18800)
Previously, the Machine Config Operator was pulling the baremetalRuntimeCfgImage container image multiple times: the first time to obtain node details and subsequent times to verify that the image is available. This caused issues during certificate rotation in situations where the mirror server or Quay was not available, and subsequent image pulls would fail. However, if the image is already on the nodes due to the first image pull then the nodes should start the kubelet regardless. With this update, the baremetalRuntimeCfgImage image is only pulled one time, thereby resolving the issue. (OCPBUGS-18772)
Previously, the nmstatectl command failed to retrieve the correct permanent MAC address during OpenShift Container Platform updates for some network environments. This caused the interface to be renamed and the bond connection on the node to break during the update. With this release, patches were applied to the nmstate package and MCO to prevent renaming, and updates proceed as expected. (OCPBUGS-17877)
Previously, the Machine Config Operator became the default provider of image registry certificates and the node-ca daemon was removed. This caused issues with the HyperShift Operator, because removing the node-ca daemon also removed the image registry path in the Machine Config Server (MCS), which HyperShift uses to get the Ignition configuration and start the bootstrap process. With this update, a flag containing the MCS image registry data is provided, which Ignition can use during the bootstrap process, thereby resolving the issue. (OCPBUGS-17811)
Previously, older RHCOS boot images contained a race condition between services on boot that prevented the node from running the rhcos-growpart command before it pulled images, preventing the node from starting up. This caused node scaling to sometimes fail on clusters that use old boot images because it was determined there was no room left on the disk. With this update, processes were added to the Machine Config Operator for stricter ordering of services so that nodes boot correctly.
Note
In these situations, updating to newer boot images prevents similar issues from occurring.
(OCPBUGS-15087)
Previously, the Machine Config Operator (MCO) leveraged the oc image extract command to pull images during updates but the ImageContentSourcePolicy (ICSP) object was not respected when pulling those images. With this update, the MCO now uses the podman pull command internally and images are pulled from the location as configured in the ICSP. (OCPBUGS-13044)

Management Console

Previously, the Expand PVC modal assumed the existing PVC had a spec.resources.requests.storage value that includes a unit. As a result, when the Expand PVC modal was used to expand a PVC that had a requests.storage value without a unit, the console would display an incorrect value in the modal. With this update, the console was updated to handle storage values with and without a unit. (OCPBUGS-27909)
Previously, the console check to determine if a file is binary was not robust enough. As a result, XML files were misidentified as binary and not displaying in the console. With this update, an additional check was added to more precisely check if a file is binary. (OCPBUGS-26591)
Previously, the Node Overview page failed to render when a MachineHealthCheck without spec.unhealthyConditions existed on a cluster. With this update, the Node Overview page was updated to allow for MachineHealthChecks without spec.unhealthyConditions. Now, the Node Overview page renders even if MachineHealthChecks without spec.unhealthyConditions are present on the cluster. (OCPBUGS-25140)
Previously, the console was not up-to-date with the newest matchers key for alert notification receivers, and the alert manager receivers created by the console utilized the older match key. With this update, the console uses matchers instead, and converts any existing match instances to matchers when modifying an existing alert manager receiver. (OCPBUGS-23248)
Previously, impersonation access was incorrectly applied. With this update, the console correctly applies impersonation access. (OCPBUGS-23125)
Previously, when the Advanced Cluster Management for Kubernetes (ACM) and multicluster engine for Kubernetes (MCE) Operators are installed and their plugins are enabled, the YAML code Monaco editor failed to load. With this update, optional resource chaining was added to prevent a failed resource call, and the YAML editor no longer fails to load when the ACM and MCE Operators are installed and their plugins enabled. (OCPBUGS-22778)

Monitoring

Previously, the monitoring-plugin component did not start if IPv6 was disabled for a cluster. This release updates the component to support the following internet protocol configurations in a cluster: IPv4 only, IPv6 only, and both IPv4 and IPv6 simultaneously. This change resolves the issue, and the monitoring-plugin component now starts up if the cluster is configured to support only IPv6. (OCPBUGS-21610)
Previously, instances of Alertmanager for core platform monitoring and for user-defined projects could inadvertently become peered during an upgrade. This issue could occur when multiple Alertmanager instances were deployed in the same cluster. This release fixes the issue by adding a --cluster.label flag to Alertmanager that helps to block any traffic that is not intended for the cluster. (OCPBUGS-18707)
Previously, it was not possible to use text-only email templates in an Alertmanager configuration to send text-only email alerts. With this update, you can configure Alertmanager to send text-only email alerts by setting the html field of the email receiver to an empty string. (OCPBUGS-11713)

Networking

Previously, when creating an IngressController with an empty spec, the IngressController’s status showed Invalid. However, the route_controller_metrics_routes_per_shard metric would still get created. When the invalid IngressController was deleted, the route_controller_metrics_routes_per_shard metric would not clear, and it would show information for that metric. With this update, metrics are only created for IngressControllers that are admitted, which resolves this issue. (OCPBUGS-3541)
Previously, timeout values larger than what Go programming language could parse were not properly validated. Consequently, timeout values larger than what HAProxy could parse caused issues with HAProxy. With this update, if the timeout specifies a value larger than what can be parsed, it is capped at the maximum that HAProxy can parse. As a result, issues are no longer caused for HAProxy. (OCPBUGS-6959)
Previously, an external neighbor could have its MAC address changed while the cluster was shutting down or hibernating. Although a Gratuitous Address Resolution Protocol (GARP) should notify other neighbors about this change, the cluster would not process the GARP because it was not running. When the cluster was brought back up, that neighbor might not be reachable from the OVN-Kubernetes cluster network because the stale MAC address was being used. This update enables an aging mechanism so that a neighbor’s MAC address is periodically refreshed every 300 seconds. (OCPBUGS-11710)
Previously, when an IngressController was configured with SSL/TLS, but did not have the clientca-configmap finalizer, the Ingress Operator would try to add the finalizer without checking whether the IngressController was marked for deletion. Consequently, if an IngressController was configured with SSL/TLS and was subsequently deleted, the Operator would correctly remove the finalizer. It would then repeatedly, and erroneously, try and fail to update the IngressController to add the finalizer back, resulting in error messages in the Operator’s logs.
With this update, the Ingress Operator no longer adds the clientca-configmap finalizer to an IngressController that is marked for deletion. As a result, the Ingress Operator no longer tries to perform erroneous updates, and no longer logs the associated errors. (OCPBUGS-14994)
Previously, a race condition occurred between the handling of pods that had been scheduled and the pods that had been completed on a node when OVN-Kubernetes started. This condition often occurred when nodes rebooted. Consequently, the same IP was erroneously assigned to multiple pods. This update fixes the race condition so that the same IP is not assigned to multiple pods in those circumstances. (OCPBUGS-16634)
Previously, there was an error that caused a route to be rejected due to a duplicate host claim. When this occurred, the system would mistakenly select the first route it encountered, which was not always the conflicting route. With this update, all routes for the conflicting host are first retrieved and then sorted based on their submission time. This allows the system to accurately determine and select the newest conflicting route. (OCPBUGS-16707)
Previously, when a new ipspec-host pod was started, it would clear or remove the existing XFRM state. Consequently, it would remove existing north-south traffic policies. This issue has been resolved. (OCPBUGS-19817)
Previously, the ovn-k8s-cni-overlay, topology:layer2 NetworkAttachmentDefinition did not work in a hosted pod when using the Kubevirt provider. Consequently, the pod did not start. This issue has been resolved, and pods can now start with an ovn-k8s-cni-overlay NetworkAttachmentDefinition. (OCPBUGS-22869)
Previously, the Azure upstream DNS did not comply with non-EDNS DNS queries because it returned a payload larger than 512 bytes. Because CoreDNS 1.10.1 no longer uses EDNS for upstream queries and only uses EDNS when the original client query uses EDNS, the combination would result in an overflow servfail error when the upstream returned a payload larger than 512 bytes for non-EDNS queries using CoreDNS 1.10.1. Consequently, upgrading from OpenShift Container Platform 4.12 to 4.13 led to some DNS queries failing that previously worked.
With this release, instead of returning an overflow servfail error, the CoreDNS now truncates the response, indicating that the client can try again in TCP. As a result, clusters with a noncompliant upstream now retry with TCP when experiencing overflow errors. This prevents any disruption of functionality between OpenShift Container Platform 4.12 and 4.13. (OCPBUGS-27904), (OCPBUGS-28205)
Previously, there was a limitation in private Microsoft Azure clusters where secondary IP addresses designated as egress IP addresses lacked outbound connectivity. This meant that pods associated with these IP addresses were unable to access the internet. However, they could still reach external servers within the infrastructure network, which is the intended use case for egress IP addresses. This update enables egress IP addresses for Microsoft Azure clusters, allowing outbound connectivity to be achieved through outbound rules. (OCPBUGS-5491)
Previously, when using multiple NICS, egress IP addresses were not correctly reassigned to the correct egress node when labeled or unlabeled. This bug has been fixed, and egress IP addresses are now reassigned to the correct egress node. (OCPBUGS-18162)
Previously, a new logic introduced for determining where to run the Keepalived process did not consider the ingress VIP or VIPs. As a result, the Keepalived pods might not have ran on ingress nodes, which could break the cluster. With this fix, the logic now includes the ingress VIP or VIPs, and the Keepalived pods should always be available. (OCPBUGS-18771)
Previously on Hypershift clusters, pods were not always being scheduled on separate zones. With this update, the multus-admission-controller deployment now uses a PodAntiAffinity spec for Hypershift to operate in the proper zone. (OCPBUGS-15220)
Previously, a certificate that existed for 10 minutes was used to implement Multus. With this update, a per node certificate is used for the Multus CNI plugin and the certificate’s existence is increased to a 24 hour duration. (OCPBUGS-19861), (OCPBUGS-19859)
Previously, the spec.desiredState.ovn.bridge-mappings API configuration deleted all the external IDs in Open vSwitch (OVS) local tables on each Kubernetes node. As a result, the OVN chassis configuration was deleted, breaking the default cluster network. With this fix, you can use the ovn.bridge-mappings configuration without affecting the OVS configuration. (OCPBUGS-18869)
Previously, if NMEA sentences were lost on their way to the E810 controller, the T-GM would not be able to synchronize the devices in the network synchronization chain. If these conditions were met, the PTP operator reported an error. With this release, a fix is implemented to report 'FREERUN' in case of a loss of the NMEA string. (OCPBUGS-20514)
Previously, pods assigned an IP from the pool created by the Whereabouts CNI plugin persisted in the ContainerCreating state after a node force reboot. With this release, the Whereabouts CNI plugin issue associated with the IP allocation after a node force reboot is resolved. (OCPBUGS-18893)
Previously, when using the assisted installer, OVN-Kubernetes took a long time to bootstrap. This issue occurred because there were three ovnkube-control-plane nodes. The first two started up normally, but the third delayed the installation time. The issue would only resolve after a timeout expiration; afterwards, installation would continue.
With this update, the third ovnkube-control-plane node has been removed. As a result, the installation time has been reduced. (OCPBUGS-29480)

Node

Due to how the Machine Config Operator (MCO) handles machine configurations for worker pools and custom pools, the MCO might apply an incorrect cgroup version argument for custom pools. As a consequence, nodes in the custom pool might feature an incorrect cgroup kernel argument that causes unpredictable behavior. As a workaround, specify cgroup version kernel arguments for worker and control plane pools only.(OCPBUGS-19352)
Previously, CRI-O was not configuring the cgroup hierarchy correctly to account for the unique way that crun creates cgroups. As a consequence, disabling the CPU quota with a PerformanceProfile did not work. With this fix, using a PerformanceProfile to disable CPU quota works as expected. (OCPBUGS-20492)
Previously, because of a default setting (container_use_dri_devices, true), containers were unable to use dri devices. With this fix, containers can use dri devices as expected. (OCPBUGS-24042)
Previously, the kubelet was running with the unconfined_service_t SELinux type. As a consequence, all our plugins failed to deploy due to an Selinux denial. With this fix, the kubelet now runs with the kubelet_exec_t SELinux type. As a result, plugins deploy as expected. (OCPBUGS-20022)
Previously, the CRI-O would automatically remove container images on an upgrade. This caused issues in pre-pulling images. With this release, when OpenShift Container Platform performs a minor upgrade, the container images will not be automatically removed and instead are subject to kubelet’s image garbage collection, which will trigger based on disk usage. (OCPBUGS-25228)
Previously, when adding RHCOS machines to an existing cluster using ansible playbooks, machines were installed with openvswitch version 2.7. With this update, RHCOS machines added to existing clusters using ansible playbooks are installed with openvswitch version 3.1. This openvswitch version increases network performance. (OCPBUGS-18595)

Node Tuning Operator (NTO)

Previously, the Tuned profile reports Degraded condition after applying a PerformanceProfile. The generated Tuned profile was trying to set a sysctl value for the default Receive Packet Steering (RPS) mask when it already configured the same value using an /etc/sysctl.d file. Tuned warns about that and the Node Tuning Operator (NTO) treats that as a degradation with the following message The TuneD daemon issued one or more error message(s) when applying the profile profile. TuneD stderr: net.core.rps_default_mask. With this update, the duplication was solved by not setting the default RPS mask using Tuned. The sysctl.d file was left in place as it applies early during boot. (OCPBUGS-25092)
Previously, the Node Tuning Operator (NTO) did not set the UserAgent and used a default one. With this update, the NTO sets the UserAgent appropriately, which makes debugging the cluster easier. (OCPBUGS-19785)
Previously, when the Node Tuning Operator (NTO) pod restarted while there were a large number of CSVs in the cluster, the NTO pod would fail and entered into CrashBackLoop state. With this update, pagination has been added to the list CSVs requests and this avoids the api-server timeout issue that resulted in the CrashBackLoop state. (OCPBUGS-14241)

OpenShift CLI (oc)

Previously, to filter operator packages by channel, for example, mirror.operators.catalog.packages.channels, you had to specify the default channel for the package, even if you did not intend to use the packages from that channel. Based on this information, the resulting catalog is considered invalid if the imageSetConfig does not contain the default channel for the package.
This update introduces the defaultChannel field in the mirror.operators.catalog.packages section. You can now select a default channel. This action enables oc-mirror to build a new catalog that defines the selected channel in the defaultChannel field as the default for the package. (OCPBUGS-385)
Previously, using eus- channels for mirroring in oc-mirror resulted in failure. This was due to the restriction of eus- channels to mirror only even-numbered releases. With this update, oc-mirror can now effectively use eus- channels for mirroring releases. (OCPBUGS-26065)
Previously, while using oc-mirror for mirroring local OCI operator catalogs from a hidden folder resulted in the following error: error: ".hidden_folder/data/publish/latest/catalog-oci/manifest-list/kubebuilder/kube-rbac-proxy@sha256:<SHASUM>" is not a valid image reference: invalid reference format. With this update, the image references are adjusted in the local OCI catalog to prevent any errors during mirroring. (OCPBUGS-25077)
Previously, the OpenShift Container Platform CLI (oc) version was not printed when running the must-gather tool. With this release, the oc version is now listed in the summary section when running must-gather. (OCPBUGS-24199)
Previously, if you ran a command in oc debug. such as oc debug node/worker — sleep 5; exit 1, without attaching to the terminal, a 0 exit code was always returned regardless of the command’s exit code. With this release, the exit code is now properly returned from the command. (OCPBUGS-20342)
Previously, when mirroring, HTTP401 errors were observed due to expired authentication tokens. These errors occurred during the catalog introspection phase or the image mirroring phase. This issue has been fixed for catalog introspection. Additionally, fixing the Network Time Protocol (NTP) resolves the problem seen during the mirroring phase. For more information, see the article on "Access to the requested resource" error when mirroring images. (OCPBUGS-7465)

Operator Lifecycle Manager (OLM)

After you install an Operator, if the catalog becomes unavailable, the subscription for the Operator is updated with a ResolutionFailed status condition. Before this update, when the catalog became available again, the ResolutionFailed status was not cleared. With this update, this status is now cleared from the subscription after the catalog becomes available, as expected. (OCPBUGS-29116)
With this update, OLM performs a best-effort verification that existing custom resources (CRs) are not invalidated when you install an updated custom resource definition (CRD). (OCPBUGS-18948)
Before this update, the install plan for an Operator displayed duplicate values in the clusterSeviceVersionNames field. This update removes the duplicate values. (OCPBUGS-17408)
Before this update, if you created an Operator group with same name as a previously existing cluster role, Operator Lifecycle Manager (OLM) overwrote the cluster role. With this fix, OLM generates a unique cluster role name for every Operator group by using the following syntax:
Naming syntax
```
olm.og.<operator_group_name>.<admin_edit_or_view>-<hash_value>
```
For more information, see Operator groups. (OCPBUGS-14698)
Previously, if an Operator installation or upgrade took longer than 10 minutes, the operation could fail with the following error:
```
Bundle unpacking failed. Reason: DeadlineExceeded, Message: Job was active longer than specified deadline
```
This issue occurred because Operator Lifecycle Manager (OLM) had a bundle unpacking job that was configured with a timeout of 600 seconds. Bundle unpacking jobs could fail because of network or configuration issues in the cluster that might be transient or resolved with user intervention. With this bug fix, OLM automates the re-creation of failed unpack jobs indefinitely by default.
This update adds the optional operatorframework.io/bundle-unpack-min-retry-interval annotation for Operator groups. This annotation sets a minimum interval to wait before attempting to re-create the failed job. (OCPBUGS-6771)
In Operator Lifecycle Manager (OLM), the Catalog Operator was logging many errors regarding missing OperatorGroup objects in namespaces that had no Operators installed. With this fix, if a namespace has no Subscription objects in it, OLM no longer checks if an OperatorGroup object is present in the namespace. (OCPBUGS-25330)
With the security context constraint (SCC) API, users are able to configure security contexts for scheduling workloads on their cluster. Because parts of core OpenShift Container Platform components run as pods that are scheduled on control plane nodes, it is possible to create a SCC that prevents those core components from being properly scheduled in openshift-* namespaces.
This bug fix reduces the role-based access control (RBAC) scope for the openshift-operator-lifecycle-manager service account used to run the package-server-manager core component. With this update, it is now significantly less likely that an SCC can be applied to the cluster that causes unexpected scheduling issues with the package-server-manager component.
Warning
The SCC API can globally affect scheduling on an OpenShift Container Platform cluster. When applying such constraints to workloads on the cluster, carefully read the SCC documentation.
(OCPBUGS-20347)

Scalability and performance

Previously, a race condition between udev events and the creation queues associated with physical devices led to some of the queues being configured with the wrong Receive Packet Steering (RPS) mask when they should be reset to zero. This resulted in the RPS mask being configured on the queues of the physical devices, meaning they were using RPS instead of Receive Side Scaling (RSS), which could impact the performance. With this fix, the event was changed to be triggered per queue creation instead of at device creation. This guarantees that no queue will be missing. The queues of all physical devices are now set up with the correct RPS mask which is empty. (OCPBUGS-18662)
Previously, due to differences in setting up a container’s cgroup hierarchy, containers that use the crun OCI runtime along with a PerformanceProfile configuration encountered performance degradation. With this release, when handling a PerformanceProfile request, CRI-O accounts for the differences in crun and correctly configures the CPU quota to ensure performance. (OCPBUGS-20492)

Storage

Previously, LVM Storage did not support disabling over-provisioning, and the minimum value for the thinPoolConfig.overprovisionRatio field in the LVMCluster CR was 2. With this release, you can disable over-provisioning by setting the value of the thinPoolConfig.overprovisionRatio field to 1. (OCPBUGS-24396)
Previously, if the LVMCluster CR was created with an invalid device path in the deviceSelector.optionalPaths field, the LVMCluster CR was in Progressing state. With this release, if the deviceSelector.optionalPaths field contains an invalid device path, LVM Storage updates the LVMCluster CR state to Failed. (OCPBUGS-23995)
Previously, the LVM Storage resource pods were preempted while the cluster was congested. With this release, upon updating OpenShift Container Platform, LVM Storage configures the priorityClassName parameter to ensure proper scheduling and preemption behavior while the cluster is congested. (OCPBUGS-23375)
Previously, upon creating the LVMCluster CR, LVM Storage skipped the counting of volume groups. This resulted in the LVMCluster CR moving to Progressing state even when the volume groups were valid. With this release, upon creating the LVMCluster CR, LVM Storage counts all the volume groups, and updates the LVMCluster CR state to Ready if the volume groups are valid. (OCPBUGS-23191)
Previously, if the default device class was not present on all selected nodes, LVM Storage failed to set up the LVMCluster CR. With this release, LVM Storage detects all the default device classes even if the default device class is present only on one of the selected nodes. With this update, you can define the default device class only on one of the selected nodes. (OCPBUGS-23181)
Previously, upon deleting the worker node in the single-node OpenShift (SNO) and worker node topology, the LVMCluster CR still included the configuration of the deleted worker node. This resulted in the LVMCluster CR remaining in Progressing state. With this release, upon deleting the worker node in the SNO and worker node topology, LVM Storage deletes the worker node configuration in the LVMCluster CR, and updates the LVMCluster CR state to Ready. (OCPBUGS-13558)
Previously, CPU limits for the AWS EFS CSI driver container could cause performance degradation of volumes managed by the AWS EFS CSI Driver Operator. With this release, the CPU limits from the AWS EFS CSI driver container have been removed to help prevent potential performance degradation. (OCPBUGS-28645)
Previously, if you used the performancePlus parameter in the Azure Disk CSI driver and provisioned volumes 512 GiB or smaller, you would receive an error from the driver that you need a disk size of at least 512 GiB. With this release, if you use the performancePlus parameter and provision volumes 512 GiB or smaller, the Azure Disk CSI driver automatically resizes volumes to be 513 GiB. (OCPBUGS-17542)

1.7. Technology Preview features status

Some features in this release are currently in Technology Preview. These experimental features are not intended for production use. Note the following scope of support on the Red Hat Customer Portal for these features:

Technology Preview Features Support Scope

In the following tables, features are marked with the following statuses:

Technology Preview
General Availability
Not Available
Deprecated

Networking Technology Preview features

Table 1.16. Networking Technology Preview tracker
Feature	4.13	4.14	4.15
Ingress Node Firewall Operator	Technology Preview	General Availability	General Availability
Advertise using L2 mode the MetalLB service from a subset of nodes, using a specific pool of IP addresses	Technology Preview	Technology Preview	Technology Preview
Multi-network policies for SR-IOV networks	Technology Preview	Technology Preview	General Availability
OVN-Kubernetes network plugin as secondary network	Technology Preview	General Availability	General Availability
Updating the interface-specific safe sysctls list	Technology Preview	Technology Preview	Technology Preview
Egress service custom resource	Not Available	Technology Preview	Technology Preview
VRF specification in `BGPPeer` custom resource	Not Available	Technology Preview	Technology Preview
VRF specification in `NodeNetworkConfigurationPolicy` custom resource	Not Available	Technology Preview	Technology Preview
Admin Network Policy (`AdminNetworkPolicy`)	Not Available	Technology Preview	Technology Preview
IPsec external traffic (north-south)	Not Available	Technology Preview	General Availability
Host network settings for SR-IOV VFs	Not Available	Not Available	Technology Preview
Dual-NIC hardware as PTP boundary clock	General Availability	General Availability	General Availability
Egress IPs on additional network interfaces	Not Available	General Availability	General Availability
Intel E810 Westport Channel NIC as PTP grandmaster clock	Technology Preview	Technology Preview	Technology Preview
Dual Intel E810 Westport Channel NICs as PTP grandmaster clock	Not Available	Technology Preview	Technology Preview

Storage Technology Preview features

Table 1.17. Storage Technology Preview tracker
Feature	4.13	4.14	4.15
Automatic device discovery and provisioning with Local Storage Operator	Technology Preview	Technology Preview	Technology Preview
Google Filestore CSI Driver Operator	Technology Preview	General Availability	General Availability
IBM Power® Virtual Server Block CSI Driver Operator	Technology Preview	Technology Preview	General Availability
Read Write Once Pod access mod	Not available	Technology Preview	Technology Preview
Build CSI Volumes in OpenShift Builds	Technology Preview	General Availability	General Availability
Shared Resources CSI Driver in OpenShift Builds	Technology Preview	Technology Preview	Technology Preview
Secrets Store CSI Driver Operator	Not available	Technology Preview	Technology Preview

Installation Technology Preview features

Table 1.18. Installation Technology Preview tracker
Feature	4.13	4.14	4.15
Installing OpenShift Container Platform on Oracle® Cloud Infrastructure (OCI) with VMs	N/A	General Availability	General Availability
Installing OpenShift Container Platform on Oracle® Cloud Infrastructure (OCI) on bare metal	N/A	Developer Preview	Developer Preview
Adding kernel modules to nodes with kvc	Technology Preview	Technology Preview	Technology Preview
Azure Tagging	Technology Preview	General Availability	General Availability
Enabling NIC partitioning for SR-IOV devices	Technology Preview	Technology Preview	Technology Preview
GCP Confidential VMs	Technology Preview	General Availability	General Availability
User-defined labels and tags for Google Cloud Platform (GCP)	Not Available	Technology Preview	Technology Preview
Installing a cluster on Alibaba Cloud by using installer-provisioned infrastructure	Technology Preview	Technology Preview	Technology Preview
Mount shared entitlements in BuildConfigs in RHEL	Technology Preview	Technology Preview	Technology Preview
Selectable Cluster Inventory	Technology Preview	Technology Preview	Technology Preview
Static IP addresses with vSphere (IPI only)	Not Available	Technology Preview	Technology Preview
Support for iSCSI devices in RHCOS	Not Available	Not Available	Technology Preview

Node Technology Preview features

Table 1.19. Nodes Technology Preview tracker
Feature	4.13	4.14	4.15
Cron job time zones	Technology Preview	General Availability	General Availability
`MaxUnavailableStatefulSet` featureset	Not Available	Technology Preview	Technology Preview

Multi-Architecture Technology Preview features

Table 1.20. Multi-Architecture Technology Preview tracker
Feature	4.13	4.14	4.15
IBM Power® Virtual Server using installer-provisioned infrastructure	Technology Preview	Technology Preview	General Availability
`kdump` on `arm64` architecture	Technology Preview	Technology Preview	Technology Preview
`kdump` on `s390x` architecture	Technology Preview	Technology Preview	Technology Preview
`kdump` on `ppc64le` architecture	Technology Preview	Technology Preview	Technology Preview

Specialized hardware and driver enablement Technology Preview features

Table 1.21. Specialized hardware and driver enablement Technology Preview tracker
Feature	4.13	4.14	4.15
Driver Toolkit	General Availability	General Availability	General Availability
Hub and spoke cluster support	General Availability	General Availability	General Availability

Scalability and performance Technology Preview features

Table 1.22. Scalability and performance Technology Preview tracker
Feature	4.13	4.14	4.15
factory-precaching-cli tool	Technology Preview	Technology Preview	Technology Preview
Hyperthreading-aware CPU manager policy	Technology Preview	Technology Preview	Technology Preview
HTTP transport replaces AMQP for PTP and bare-metal events	Technology Preview	Technology Preview	Technology Preview
Mount namespace encapsulation	Technology Preview	Technology Preview	Technology Preview
NUMA-aware scheduling with NUMA Resources Operator	General Availability	General Availability	General Availability
Node Observability Operator	Technology Preview	Technology Preview	Technology Preview
Single-node OpenShift cluster expansion with worker nodes	General Availability	General Availability	General Availability
Topology Aware Lifecycle Manager (TALM)	General Availability	General Availability	General Availability
Tuning etcd latency tolerances	Not Available	Technology Preview	Technology Preview
Workload partitioning for three-node clusters and standard clusters	Technology Preview	General Availability	General Availability

Operator lifecycle and development Technology Preview features

Table 1.23. Operator lifecycle and development Technology Preview tracker
Feature	4.13	4.14	4.15
Operator Lifecycle Manager (OLM) v1	Not Available	Technology Preview	Technology Preview
RukPak	Technology Preview	Technology Preview	Technology Preview
Platform Operators	Technology Preview	Technology Preview	Technology Preview
Hybrid Helm Operator	Technology Preview	Technology Preview	Technology Preview
Java-based Operator	Technology Preview	Technology Preview	Technology Preview

Monitoring Technology Preview features

Table 1.24. Monitoring Technology Preview tracker
Feature	4.13	4.14	4.15
Alerting rules based on platform monitoring metrics	Technology Preview	General Availability	General Availability
Metrics Collection Profiles	Technology Preview	Technology Preview	Technology Preview
Metrics Server	Not Available	Not Available	Technology Preview

Red Hat OpenStack Platform (RHOSP) Technology Preview features

Table 1.25. RHOSP Technology Preview tracker
Feature	4.13	4.14	4.15
External load balancers with installer-provisioned infrastructure	Technology Preview	General Availability	General Availability
Dual-stack networking with installer-provisioned infrastructure	Not Available	Technology Preview	General Availability
Dual-stack networking with user-provisioned infrastructure	Not Available	Not Available	General Availability
OpenStack integration into the Cluster CAPI Operator ^[1]	Not Available	Not Available	Technology Preview
Control Plane with `rootVolumes` and `etcd` on local disk	Not Available	Not Available	Technology Preview

For more information, see OpenStack integration into the Cluster CAPI Operator.

Architecture Technology Preview features

Table 1.26. Architecture Technology Preview tracker
Feature	4.13	4.14	4.15
Hosted control planes for OpenShift Container Platform on Amazon Web Services (AWS)	Technology Preview	Technology Preview	Technology Preview
Hosted control planes for OpenShift Container Platform on bare metal	Technology Preview	General Availability	General Availability
Hosted control planes for OpenShift Container Platform on OpenShift Virtualization	Not Available	General Availability	General Availability
Hosted control planes for OpenShift Container Platform using non-bare metal agent machines	Not Available	Not Available	Technology Preview

Machine management Technology Preview features

Table 1.27. Machine management Technology Preview tracker
Feature	4.13	4.14	4.15
Managing machines with the Cluster API for Amazon Web Services	Technology Preview	Technology Preview	Technology Preview
Managing machines with the Cluster API for Google Cloud Platform	Technology Preview	Technology Preview	Technology Preview
Defining a vSphere failure domain for a control plane machine set	Not Available	Not Available	Technology Preview
Cloud controller manager for Alibaba Cloud	Technology Preview	Technology Preview	Technology Preview
Cloud controller manager for Amazon Web Services	Technology Preview	General Availability	General Availability
Cloud controller manager for Google Cloud Platform	Technology Preview	Technology Preview	General Availability
Cloud controller manager for IBM Power® VS	Technology Preview	Technology Preview	Technology Preview
Cloud controller manager for Microsoft Azure	Technology Preview	General Availability	General Availability

Authentication and authorization Technology Preview features

Table 1.28. Authentication and authorization Technology Preview tracker
Feature	4.13	4.14	4.15
Pod security admission restricted enforcement	Technology Preview	Technology Preview	Technology Preview

Machine Config Operator Technology Preview features

Table 1.29. Machine Config Operator Technology Preview tracker
Feature	4.13	4.14	4.15
Improved MCO state reporting	Not Available	Not Available	Technology Preview

1.8. Known issues

The oc annotate command does not work for LDAP group names that contain an equal sign (=), because the command uses the equal sign as a delimiter between the annotation name and value. As a workaround, use oc patch or oc edit to add the annotation. (BZ#1917280)
When installing a cluster on VMware vSphere with static IP addresses (Tech Preview), the installation program can apply an incorrect configuration to the control plane machine sets (CPMS). This can result in control plane machines being recreated without static IP addresses defined. (OCPBUGS-28236)
Specifying a standard Ebdsv5 or Ebsv5 family machine type instance is not supported when installing an Azure cluster. This limitation is the result of the Azure terraform provider not supporting these machine types. (OCPBUGS-18690)
When running a cluster with FIPS enabled, you might receive the following error when running the OpenShift CLI (oc) on a RHEL 9 system: FIPS mode is enabled, but the required OpenSSL backend is unavailable. As a workaround, use the oc binary provided with the OpenShift Container Platform cluster. (OCPBUGS-23386)
In 4.15 with IPv6 networking running on Red Hat OpenStack Platform (RHOSP) environments, IngressController objects configured with the endpointPublishingStrategy.type=LoadBalancerService YAML attribute will not function correctly. (BZ#2263550, BZ#2263552)
In 4.15 with IPv6 networking running on Red Hat OpenStack Platform (RHOSP) environments, health monitors created with IPv6 ovn-octavia load balancers will not function correctly. (OCPBUGS-29603)
In 4.15 with IPv6 networking running on Red Hat OpenStack Platform (RHOSP) environments, sharing a IPv6 load balancer with multiple services is not allowed because of an issue that mistakenly marks IPv6 load balancer as internal to the cluster.(OCPBUGS-29605)
When installing an OpenShift Container Platform cluster with static IP addressing and Tang encryption, nodes start without network settings. This condition prevents nodes from accessing the Tang server, causing installation to fail. To address this condition, you must set the network settings for each node as ip installer arguments.
1. For installer-provisioned infrastructure, before installation provide the network settings as ip installer arguments for each node by executing the following steps.
  1. Create the manifests.
  2. For each node, modify the BareMetalHost custom resource with annotations to include the network settings. For example:
    $ cd ~/clusterconfigs/openshift $ vim openshift-worker-0.yaml
    apiVersion: metal3.io/v1alpha1 kind: BareMetalHost metadata: annotations: bmac.agent-install.openshift.io/installer-args: '["--append-karg", "ip=<static_ip>::<gateway>:<netmask>:<hostname_1>:<interface>:none", "--save-partindex", "1", "-n"]' 1 2 3 4 5 inspect.metal3.io: disabled bmac.agent-install.openshift.io/hostname: <fqdn> 6 bmac.agent-install.openshift.io/role: <role> 7 generation: 1 name: openshift-worker-0 namespace: mynamespace spec: automatedCleaningMode: disabled bmc: address: idrac-virtualmedia://<bmc_ip>/redfish/v1/Systems/System.Embedded.1 8 credentialsName: bmc-secret-openshift-worker-0 disableCertificateVerification: true bootMACAddress: 94:6D:AE:AB:EE:E8 bootMode: "UEFI" rootDeviceHints: deviceName: /dev/sda
    For the ip settings, replace:
    1
    <static_ip> with the static IP address for the node, for example, 192.168.1.100
    2
    <gateway> with the IP address of your network’s gateway, for example, 192.168.1.1
    3
    <netmask> with the network mask, for example, 255.255.255.0
    4
    <hostname_1> with the node’s hostname, for example, node1.example.com
    5
    <interface> with the name of the network interface, for example, eth0
    6
    <fqdn> with the fully qualified domain name of the node
    7
    <role> with worker or master to reflect the node’s role
    8
    <bmc_ip> with the BMC IP address and the protocol and path of the BMC, as needed.
  3. Save the file to the clusterconfigs/openshift directory.
  4. Create the cluster.
2. When installing with the Assisted Installer, before installation modify each node’s installer arguments using the API to append the network settings as ip installer arguments. For example:
```
$ curl https://api.openshift.com/api/assisted-install/v2/infra-envs/${infra_env_id}/hosts/${host_id}/installer-args \
-X PATCH \
-H "Authorization: Bearer ${API_TOKEN}" \
-H "Content-Type: application/json" \
-d '
    {
      "args": [
        "--append-karg",
        "ip=<static_ip>::<gateway>:<netmask>:<hostname_1>:<interface>:none", 1 2 3 4 5
        "--save-partindex",
        "1",
        "-n"
      ]
    }
  ' | jq
```
  For the previous network settings, replace:
  1
  <static_ip> with the static IP address for the node, for example, 192.168.1.100
  2
  <gateway> with the IP address of your network’s gateway, for example, 192.168.1.1
  3
  <netmask> with the network mask, for example, 255.255.255.0
  4
  <hostname_1> with the node’s hostname, for example, node1.example.com
  5
  <interface> with the name of the network interface, for example, eth0.

Contact Red Hat Support for additional details and assistance.

(OCPBUGS-23119)

In OpenShift Container Platform 4.15, all nodes use Linux control group version 2 (cgroup v2) for internal resource management in alignment with the default RHEL 9 configuration. However, if you apply a performance profile in your cluster, the low-latency tuning features associated with the performance profile do not support cgroup v2.
As a result, if you apply a performance profile, all nodes in the cluster reboot to switch back to the cgroup v1 configuration. This reboot includes control plane nodes and worker nodes that were not targeted by the performance profile.
To revert all nodes in the cluster to the cgroups v2 configuration, you must edit the Node resource. For more information, see Configuring Linux cgroup v2. You cannot revert the cluster to the cgroups v2 configuration by removing the last performance profile. (OCPBUGS-16976)
Currently, an error might occur when deleting a pod that uses an SR-IOV network device. This error is caused by a change in RHEL 9 where the previous name of a network interface is added to its alternative names list when it is renamed. As a consequence, when a pod attached to an SR-IOV virtual function (VF) is deleted, the VF returns to the pool with a new unexpected name, such as dev69, instead of its original name, such as ensf0v2. Although this error is not severe, the Multus and SR-IOV logs might show the error while the system recovers on its own. Deleting the pod might take a few seconds longer due to this error. (OCPBUGS-11281, OCPBUGS-18822, RHEL-5988)
When you run Cloud-native Network Functions (CNF) latency tests on an OpenShift Container Platform cluster, the oslat test can sometimes return results greater than 20 microseconds. This results in an oslat test failure. (RHEL-9279)
When you use preempt-rt patches with the real time kernel and you update the SMP affinity of a network interrupt, the corresponding Interrupt Request (IRQ) thread does not immediately receive the update. Instead, the update takes effect when the next interrupt is received, and the thread is subsequently migrated to the correct core. (RHEL-9148)
The global navigation satellite system (GNSS) module in an Intel Westport Channel e810 NIC that is configured as a grandmaster clock (T-GM) can report the GPS FIX state and the GNSS offset between the GNSS module and the GNSS constellation satellites.
The current T-GM implementation does not use the ubxtool CLI to probe the ublox module for reading the GNSS offset and GPS FIX values. Instead, it uses the gpsd service to read the GPS FIX information. This is because the current implementation of the ubxtool CLI takes 2 seconds to receive a response, and with every call, it increases CPU usage threefold. (OCPBUGS-17422)
The current grandmaster clock (T-GM) implementation has a single NMEA sentence generator sourced from the GNSS without a backup NMEA sentence generator. If NMEA sentences are lost on their way to the e810 NIC, the T-GM cannot synchronize the devices in the network synchronization chain and the PTP Operator reports an error. A proposed fix is to report a FREERUN event when the NMEA string is lost. (OCPBUGS-19838)
Currently, the YAML tab of some pages in the web console stops unexpectedly on some browsers when the multicluster engine for Kubernetes operator (MCE) is installed. The following message is displayed: "Oh no! Something went wrong." (OCPBUGS-29812)
If you have IPsec enabled on your cluster, you must disable it prior to upgrading to OpenShift Container Platform 4.15. There is a known issue where pod-to-pod communication might be interrupted or lost when updating to 4.15 without disabling IPsec. For information on disabling IPsec, see Configuring IPsec encryption. (OCPBUGS-43323)
If you have IPsec enabled on the cluster and IPsec encryption is configured between the cluster and an external node, stopping the IPsec connection on the external node causes a loss of connectivity to the external node. This connectivity loss occurs because on the OpenShift Container Platform side of the connection, the IPsec tunnel shutdown is not recognized. (RHEL-24802)
If you have IPsec enabled on the cluster, and your cluster is a hosted control planes for OpenShift Container Platform cluster, the MTU adjustment to account for the IPsec tunnel for pod-to-pod traffic does not happen automatically. (OCPBUGS-28757)
If you have IPsec enabled on the cluster, you cannot modify existing IPsec tunnels to external hosts that you have created. Modifying an existing NMState Operator NodeNetworkConfigurationPolicy object to adjust an existing IPsec configuration to encrypt traffic to external hosts is not recognized by OpenShift Container Platform. (RHEL-22720)
If you have IPsec enabled on the cluster, on the node hosting the north-south IPsec connection, restarting the ipsec.service systemd unit or restarting the ovn-ipsec-host pod causes a loss of the IPsec connection. (RHEL-26878)
Currently, there is a known issue with the mirroring of operator catalogs. The oc-mirror rebuilds the catalogs and regenerates their internal cache according to the imagesetconfig catalog filtering specifications. This operation requires the use of the opm binary contained in the catalogs. In OpenShift Container Platform 4.15, the operator catalogs contain the opm RHEL 9 binary, which causes the mirroring process to fail on RHEL 8 systems. (OCPBUGS-31536)

There is currently a known issue where the version of the opm CLI tool released with OpenShift Container Platform 4.15 does not support RHEL 8. As a workaround, RHEL 8 users can navigate to the OpenShift mirror site and download the latest version of the tarball released with OpenShift Container Platform 4.14.

There is a known issue in this release preventing the creation of web terminals when logged into the cluster as kubeadmin. The terminal will return the message: Error Loading OpenShift command line terminal: User is not a owner of the requested workspace. This issue will be fixed in a future OpenShift Container Platform release. (WTO-262)

Currently, defining a sysctl value for a setting with a slash in its name, such as for bond devices, in the profile field of a Tuned resource might not work. Values with a slash in the sysctl option name are not mapped correctly to the /proc filesystem. As a workaround, create a MachineConfig resource that places a configuration file with the required values in the /etc/sysctl.d node directory. (RHEL-3707)
Due to an issue with Kubernetes, the CPU Manager is unable to return CPU resources from the last pod admitted to a node to the pool of available CPU resources. These resources are allocatable if a subsequent pod is admitted to the node. However, this in turn becomes the last pod, and again, the CPU manager cannot return this pod’s resources to the available pool.
This issue affects CPU load balancing features because these features depend on the CPU Manager releasing CPUs to the available pool. Consequently, non-guaranteed pods might run with a reduced number of CPUs. As a workaround, schedule a pod with a best-effort CPU Manager policy on the affected node. This pod will be the last admitted pod and this ensures the resources will be correctly released to the available pool.(OCPBUGS-17792)
When a node reboot occurs all pods are restarted in a random order. In this scenario it is possible that tuned pod started after the workload pods. This means the workload pods start with partial tuning, which can affect performance or even cause the workload to fail. (OCPBUGS-26400)
The installation of OpenShift Container Platform might fail when a performance profile is present in the extra manifests folder and targets the primary or worker pools. This is caused by the internal install ordering that processes the performance profile before the default primary and worker MachineConfigPools are created. It is possible to workaround this issue by including a copy of the stock primary or worker MachineConfigPools in the extra manifests folder. (OCPBUGS-27948) (OCPBUGS-18640)
In hosted control planes for OpenShift Container Platform, the HyperShift Operator extracts the release metadata only once during Operator initialization. When you make changes in the management cluster or create a hosted cluster, the HyperShift Operator does not refresh the release metadata. As a workaround, restart the HyperShift Operator by deleting its pod deployment. (OCPBUGS-29110)
In hosted control planes for OpenShift Container Platform, when you create the custom resource definition (CRD) for ImageDigestMirrorSet and ImageContentSourcePolicy objects at the same time in a disconnected environment, the HyperShift Operator creates the object only for the ImageDigestMirrorSet CRD, ignoring the ImageContentSourcePolicy CRD. As a workaround, copy the ImageContentSourcePolicies object configuration in the ImageDigestMirrorSet CRD. (OCPBUGS-29466)
In hosted control planes for OpenShift Container Platform, when creating a hosted cluster in a disconnected environment, if you do not set the hypershift.openshift.io/control-plane-operator-image annotation explicitly in the HostedCluster resource, the hosted cluster deployment fails with an error. (OCPBUGS-29494)

1.9. Asynchronous errata updates

Security, bug fix, and enhancement updates for OpenShift Container Platform 4.15 are released as asynchronous errata through the Red Hat Network. All OpenShift Container Platform 4.15 errata is available on the Red Hat Customer Portal. See the OpenShift Container Platform Life Cycle for more information about asynchronous errata.

Red Hat Customer Portal users can enable errata notifications in the account settings for Red Hat Subscription Management (RHSM). When errata notifications are enabled, users are notified through email whenever new errata relevant to their registered systems are released.

Note

Red Hat Customer Portal user accounts must have systems registered and consuming OpenShift Container Platform entitlements for OpenShift Container Platform errata notification emails to generate.

This section will continue to be updated over time to provide notes on enhancements and bug fixes for future asynchronous errata releases of OpenShift Container Platform 4.15. Versioned asynchronous releases, for example with the form OpenShift Container Platform 4.15.z, will be detailed in subsections. In addition, releases in which the errata text cannot fit in the space provided by the advisory will be detailed in subsections that follow.

Important

For any OpenShift Container Platform release, always review the instructions on updating your cluster properly.

1.9.1. RHSA-2024:8425 - OpenShift Container Platform 4.15.37 bug fix and security update

Issued: 30 October 2024

OpenShift Container Platform release 4.15.37, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:8425 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:8428 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.37 --pullspecs

1.9.1.1. Enhancements

Previously, you could not control log levels for the internal component that selects IP addresses for cluster nodes. With this release, you can now enable debug log levels so that you can either increase or decrease log levels on demand. To adjust log levels, you must create a config map manifest file with a configuration analogous to the following:
```
apiVersion: v1
data:
  enable-nodeip-debug: "true"
kind: ConfigMap
metadata:
  name: logging
  namespace: openshift-vsphere-infra
# ...
```
(OCPBUGS-37704)

1.9.1.2. Bug fixes

Previously, when you attempted to use the oc import-image command to import an image in a hosted control planes cluster, the command failed because of access issues with a private image registry. With this release, an update to openshift-apiserver pods in a hosted control planes cluster resolves names that use the data plane so that the oc import-image command now works as expected with private image registries. (OCPBUGS-43468)
Previously, when you used the must-gather tool, a Multus Container Network Interface (CNI) log file, multus.log, was stored in a node’s file system. This situation caused the tool to generate unnecessary debug pods in a node. With this release, the Multus CNI no longer creates a multus.log file, and instead uses a CNI plugin pattern to inspect any logs for Multus DaemonSet pods in the openshift-multus namespace. (OCPBUGS-43057)
Previously, the Ingress and DNS operators failed to start correctly because of rotating root certificates. With this release, the Ingress and DNS operator Kubeconfigs are conditionally managed by using the annotation that defines when the PKI requires management and the issue is resolved.. (OCPBUGS-42992)
Previously, when you configured the image registry to use an Microsoft Azure storage account that was located in a resource group other than the cluster’s resource group, the Image Registry Operator would become degraded. This occurred because of a validation error. With this release, an update to the Operator allows for authentication only by using a storage account key. Validation of other authentication requirements is not required. (OCPBUGS-42934)
Previously for hosted control planes (HCP), a cluster that used mirroring release images might result in existing node pools to use the hosted cluster’s operating system version instead of the NodePool version. With this release, a fix ensures that node pools use their own versions. (OCPBUGS-42881)
Previously, creating cron jobs to create pods for your cluster caused the component that fetches the pods to fail. Because of this issue, the Topology page on the OpenShift Container Platform web console failed. With this release, a 3 second delay is configured for the component that fetches pods that are generated from the cron job so that this issue no longer exists. (OCPBUGS-42611)
Previously, the Ingress Operator prevented upgrades from OpenShift Container Platform 4.15 to 4.16 if any certificate type in the default certificate chain used the SHA-1 hashing algorithm. With this release, the Ingress Operator now only checks default leaf certificates for SHA-1 hash values, so that intermediate and root certificates in the default chain can continue to use SHA-1 hash values without blocking cluster upgrades. (OCPBUGS-42480)
Previously, when installing a cluster on bare metal using installer provisioned infrastructure, the installation could time out if the network to the bootstrap virtual machine is slow. With this update, the timeout duration has been increased to cover a wider range of network performance scenarios. (OCPBUGS-42335)
Previously, Ironic inspection failed if special or invalid characters existed in the serial number of a block device. This occurred because the lsblk command failed to escape the characters. With this release, the command escapes the characters so this issue no longer persists. (OCPBUGS-39018)

1.9.1.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.2. RHSA-2024:7594 - OpenShift Container Platform 4.15.36 bug fix and security update

Issued: 09 October 2024

OpenShift Container Platform release 4.15.36, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:7594 advisory. There are no RPM packages for this release.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.36 --pullspecs

1.9.2.1. Bug fixes

Previously, if a connection on port 9637 for Windows nodes was refused, the Kubelet Service Monitor threw a target down alert because CRIO doesn’t run on Windows nodes. With this release, Windows nodes are excluded from the Kubelet Service Monitor. (OCPBUGS-42586)
Previously, a change in the ordering of the TextInput parameters for PatternFly v4 and v5 caused the until field to be improperly filled and you could not edit it. With this release, the until field is editable so you can input the correct information. (OCPBUGS-42384)
Previously, when the Node Tuning Operator (NTO) was configured using performance profiles, it created the ocp-tuned-one-shot systemd service. The service ran before the kubelet and blocked the service execution. The systemd service invoked Podman, which used the NTO image. If the NTO image was not present, Podman tried to fetch the image.
With this release, support is added for cluster-wide proxy environment variables that are defined in the /etc/mco/proxy.env environment. This allows Podman to pull NTO images in environments that need the HTTP/HTTPS proxy for out-of-cluster connections. (OCPBUGS-42284)
Previously, a node registration issue prevented you from using Redfish Virtual Media to add an xFusion bare-metal node to your cluster. The issue occurred because the hardware was not fully compliant with Redfish. With this release, you can add xFusion bare-metal nodes to your cluster. (OCPBUGS-38798)

1.9.2.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.3. RHSA-2024:7179 - OpenShift Container Platform 4.15.35 bug fix and security update

Issued: 02 October 2024

OpenShift Container Platform release 4.15.35, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:7179 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:7182 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.35 --pullspecs

1.9.3.1. Bug fixes

Previously, when you upgraded an OpenShift Container Platform cluster from 4.14 to 4.15, the vCenterCluster parameter was not populated with a value in the use-connection-form.ts configuration file. As a result, the VMware vSphere GUI did not display VMware vSphere vCenter information. With this release, an update to the Infrastructure custom resource (CR) ensures it has that the GUI checks the cloud-provider-config ConfigMap for the vCenterCluster value. (OCPBUGS-42144)
Previously, deploying a self-managed private hosted cluster on Amazon Web Services (AWS) fails because the bootstrap-kubeconfig file uses an incorrect kube-apiserver port. As a result, the AWS instances are provisioned but cannot join the hosted cluster as nodes. With this release, the issue is fixed so this issue no longer occurs. (OCPBUGS-42214)
Previously, when the hosted cluster controllerAvailabilityPolicy was set to SingleReplica, the podAntiAffinity property on networking components blocked the availability of the components to a cluster. With this release, the issue is resolved. (OCPBUGS-42020)
Previously, adding IPv6 support for user-provisioned installation platforms caused an issue with naming Red Hat OpenStack Platform (RHOSP) resources, especially when you run two user-provisioned installation clusters on the same RHOSP platform. This happened because the two clusters share the same names for network, subnets, and router resources. With this release, all the resources names for a cluster remain unique for that cluster so no interfere occurs. (OCPBUGS-42011)
Previously, when you configured a hosted cluster to use an identity provider (IdP) that has either an http or https endpoint, the IdP hostname did not resolve when sent through the proxy. With this release, a DNS lookup operation checks the IdP before IdP traffic is sent through a proxy, so that IdPs with hostnames can only be resolved by the data plane and verified by the Control Plane Operator (CPO). (OCPBUGS-41373)
Previously, a group ID was not added to the /etc/group within the container when the spec.securityContext.runAsGroup attribute was set in the Pod resource. With this release, this issue is fixed. (OCPBUGS-41245)
Previously, the order of an Ansible playbook was modified to run before the metadata.json file was created, which caused issues with older versions of Ansible. With this release, the playbook is more tolerant of missing files and the issue is resolved. (OCPBUGS-39288)
Previously, dynamic plugins using PatternFly 4 referenced variables that are not available in OpenShift Container Platform 4.15 and later. This caused contrast issues for Red Hat Advanced Cluster Management (RHACM) in dark mode. With this update, older chart styles are now available to support PatternFly 4 charts used by dynamic plugins. (OCPBUGS-38537)
Previously, proxying for identity provider (IdP) communication occurred in the Konnectivity agent. By the time traffic reached Konnectivity, its protocol and hostname was no longer available. As a consequence, proxying was not done correctly for the OAUTH server pod. It did not distinguish between protocols that require proxying (http or https) and protocols that do not (LDAP). In addition, it did not honor the no_proxy variable that is configured in the HostedCluster.spec.configuration.proxy spec. With this release, you can configure the proxy on the Konnectivity sidecar of the OAUTH server so that traffic is routed appropriately, honoring your no_proxy settings. As a result, the OAUTH server can communicate properly with IdPs when a proxy is configured for the hosted cluster. (OCPBUGS-38058)
Previously, the Assisted Installer did not reload new data from the Assisted Service when the Assisted Installer checked control plane nodes for readiness and a conflict existed with a write operation from the Assisted Installer controller. This conflict prevented the Assisted Installer from detecting a node that was marked by the Assisted Installer controller as Ready because the Assisted Installer relied on older information. With this release, the Assisted Installer can receive the newest information from the Assisted Service, so that it the Assisted Installer can accurately detect the status of each node. (OCPBUGS-38003)

1.9.3.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.4. RHSA-2024:6818 - OpenShift Container Platform 4.15.34 bug fix and security update

Issued: 25 September 2024

OpenShift Container Platform release 4.15.34, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:6818 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:6821 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.34 --pullspecs

1.9.4.1. Enhancements

The following enhancement is included in this z-stream release:

1.9.4.1.1. Insights Operator collects new metric

The Insights Operator (IO) can now collect data from the haproxy_exporter_server_threshold metric. (OCPBUGS-38593)

1.9.4.2. Bug fixes

Previously, when the Operator Lifecycle Manager (OLM) evaluated a potential update, it used the dynamic client list for all custom resource (CR) instances in the cluster. For clusters with a large number of CRs, that could result in timeouts from the apiserver and stranded updates. With this release, the issue is resolved. (OCPBUGS-41819)
Previously, if you created a hosted cluster by using a proxy for the purposes of making the cluster reach a control plane from a compute node, the compute node would be unavailable to the cluster. With this release, the proxy settings are updated for the node so that the node can use a proxy to successfully communicate with the control plane. (OCPBUGS-41947)
Previously, an AdditionalTrustedCA field that was specified in the Hosted Cluster image configuration was not reconciled into the openshift-config namespace as expected and the component was not available. With this release, the issue is resolved. (OCPBUGS-41809)
Previously, when you created a LoadBalancer service for the Ingress Operator, a log message was generated that stated the change was not effective. This log message should only trigger for a change to an Infra custom resource. With this release, this log message is no longer generated when you create a LoadBalancer service for the Ingress Operator. (OCPBUGS-41635)
Previously, if an IP address was assigned to an egress node and was deleted, then pods selected by that egress IP address might have had incorrect routing information to that egress node. With this release, the issue has been resolved. (OCPBUGS-41340)
Previously, proxying for Operators that run in the control plane of a hosted cluster was done through proxy settings on the Konnectivity agent pod that runs in the data plane. As a consequence, it was not possible to distinguish whether proxying was needed based on application protocol. For parity with OpenShift Container Platform, IDP communication through HTTPS or HTTP should be proxied, but LDAP communication should not be proxied. This type of proxying also ignores NO_PROXY entries that rely on host names because by the time traffic reaches the Konnectivity agent, only the destination IP address is available. With this release, in hosted clusters, proxy is invoked in the control plane by konnectivity-https-proxy and konnectivity-socks5-proxy, and proxying traffic is stopped from the Konnectivity agent. As a result, traffic that is destined for LDAP servers is no longer proxied. Other HTTPS or HTTPS traffic is proxied correctly. The NO_PROXY setting is honored when you specify hostnames. (OCPBUGS-38065)

1.9.4.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.5. RHSA-2024:6685 - OpenShift Container Platform 4.15.33 bug fix and security update

Issued: 19 September 2024

OpenShift Container Platform release 4.15.33, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:6685 advisory. There are no RPM packages in this release.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.33 --pullspecs

1.9.5.1. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.6. RHSA-2024:6637 - OpenShift Container Platform 4.15.32 bug fix and security update

Issued: 18 September 2024

OpenShift Container Platform release 4.15.32, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:6637 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:6640 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.32 --pullspecs

1.9.6.1. Bug fixes

Previously, the Cloud Credential Operator (CCO) would produce an error when starting or restarting when there were a large number of secrets in the cluster fetched at once. With this release, the CCO fetches the secrets in batches of 100 and the issue is resolved. (OCPBUGS-41235)
Previously, the ControlPlaneMachineSet (CPMS) checked templates and the resource pool based on the full vCenter path. This caused the CPMS to start when it was not needed. With this release, CPMS also checks the file name and the issue is resolved. (OCPBUGS-24632)

1.9.6.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.7. RHSA-2024:6409 - OpenShift Container Platform 4.15.31 bug fix and security update

Issued: 11 September 2024

OpenShift Container Platform release 4.15.31, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:6409 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:6414 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.31 --pullspecs

1.9.7.1. Bug fixes

Previously, the spec.noProxy field from the cluster-wide proxy was not considered when the Cluster Monitoring Operator (CMO) configured proxy capabilities for Prometheus remote write endpoints. With this release, the CMO no longer configures proxy capabilities for any remote write endpoints whose URL would bypass the proxy according to the noProxy field. (OCPBUGS-39172)
Previously, utlization cards displayed limit in a way that incorrectly implied a relationship between capacity and limits. With this release, the position of limit is changed to remove this implication. (OCPBUGS-39085)
Previously, the openvswitch service used older cluster configurations after a cluster upgrade and this caused the openvswitch service to stop. With this release, the openvswitch service is now restarted after a cluster upgrade so that the service uses the newer cluster configurations. (OCPBUGS-34842)
Previously, after you submitted the same value into the VMware vSphere configuration dialog, cluster nodes unintentionally rebooted. With this release, nodes reboot after you enter new values into the dialog and not the same values.(OCPBUGS-33938)
Previously, if a virtual machine (VM) was deleted and the network interface controller (NIC) still existed for that VM, the Microsoft Azure VM verification check failed. With this release, the verification check can now handle this situation by gracefully processing the issue without failing. (OCPBUGS-31467)
Previously, Red Hat HyperShift periodic conformance jobs failed because of changes to the core operating system. These failed jobs caused the OpenShift API deployment to fail. With this release, an update recursively copies individual trusted certificate authority (CA) certificates instead of copying a single file, so that the periodic conformance jobs succeed and the OpenShift API runs as expected OCPBUGS-38943)
Previously, the grace period for a node to become ready was not aligned with upstream behavior. This grace period sometimes caused a node to cycle between Ready and Not ready states. With this release, the issue is fixed so that the grace period does not cause a node to cycle between the two states. (OCPBUGS-39077)

1.9.7.2. Known issues

On Red Hat OpenShift Service on AWS, node pools might stop scaling workloads or updating configurations for a cluster that uses the 4.15.23 or later version of the Hosted control planes service. Depending on the version of components that interact with your cluster, you can resolve this issue be completing the steps in one of the following Red Hat Knowledgebase articles:
- ROSA HCP clusters fail to add new nodes in MachinePool version older than 4.15.23
- ROSA upgrade issue mitigation for HOSTEDCP-1941
  (OCPBUGS-39463)

1.9.7.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.8. RHSA-2024:6013 - OpenShift Container Platform 4.15.30 bug fix and security update

Issued: 5 September 2024

OpenShift Container Platform release 4.15.30, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:6013 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:6016 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.30 --pullspecs

1.9.8.1. Bug fixes

Previously, when running the oc logs -f <pod> command, the logs would not output anything after the log file was rotated. With this release, the kubelet outputs a log file after it has been rotated, and as a result the issue is resolved. (OCPBUGS-38861)
Previously, an internal timeout would occur when the service account had short lived credentials. With this release, that timeout is removed, and the timeout is now controlled by the parent context. (OCPBUGS-38198)
Previously, setting an invalid .spec.endpoints.proxyUrl attribute in the ServiceMonitor resource would result in breaking, reloading, and restarting Prometheus. This update fixes the issue by validating the proxyUrl attribute against invalid syntax. (OCPBUGS-36719)
Previously, there was an error when adding parameters to the Pipeline when the resource field was added to the payload, and as a result resources were deprecated. With this update, the resource fields have been removed from the payload, and you can add parameters to the Pipeline without getting an error. (OCPBUGS-33076)

1.9.8.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.9. RHSA-2024:5439 - OpenShift Container Platform 4.15.29 bug fix and security update

Issued: 28 August 2024

OpenShift Container Platform release 4.15.29, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHBA-2024:5751 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:5754 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.29 --pullspecs

1.9.9.1. Bug fixes

Previously, the ordering of Network Interface Controllers (NICs) in the cloud provider was non-deterministic, which could result in the node using the wrong NIC for communication with the cluster. With this update, the ordering is now consistent. This fix prevents the random ordering that was causing the node networking fail. (OCPBUGS-38577)

1.9.9.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.10. RHSA-2024:5439 - OpenShift Container Platform 4.15.28 bug fix and security update

Issued: 2024-08-22

OpenShift Container Platform release 4.15.28, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:5439 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:5442 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.28 --pullspecs

1.9.10.1. Bug fixes

Previously, the OpenShift Container Platform web console failed to restart a bare metal node. This release fixes this issue so that you can restart a bare metal node by using the OpenShift Container Platform web console. (OCPBUGS-37099)

1.9.10.2. Known issues

An error might occur when deleting a pod that uses an SR-IOV network device. This error is caused by a change in RHEL 9 where the previous name of a network interface is added to its alternative names list when it is renamed. As a consequence, when a pod attached to an SR-IOV virtual function (VF) is deleted, the VF returns to the pool with a new unexpected name; for example, dev69, instead of its original name,ensf0v2. Although this error is non-fatal, Multus and SR-IOV logs might show the error while the system reboots. Deleting the pod might take a few extra seconds due to this error. (OCPBUGS-11281,OCPBUGS-18822, RHEL-5988)

1.9.10.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.11. RHSA-2024:5160 - OpenShift Container Platform 4.15.27 bug fix and security update

Issued: 15 August 2024

OpenShift Container Platform release 4.15.27, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:5160 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:5163 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.27 --pullspecs

1.9.11.1. Enhancements

The following enhancement is included in this z-stream release:

1.9.11.1.1. Collecting Ingress controller certificate information

The Insights Operator now collects NotBefore and NotAfter date information about all Ingress Controller certificates and aggregates the information into a JSON file in the aggregated/ingress_controllers_certs.json path. (OCPBUGS-37672)

1.9.11.2. Bug fixes

Previously, when installing a cluster using the Agent-based installation program, generating a large number of manifests prior to installation could fill the Ignition storage, causing the installation to fail. With this update, the Ignition storage has been increased to allow for a much greater number of installation manifests. (OCPBUGS-33402)
Previously, when using the Agent-based installation program in a disconnected environment, unnecessary certificates were added to the CA trust bundle. With this update, the CA bundle ConfigMap only contains CAs explicitly specified by the user. (OCPBUGS-34721)
Previously, HostedClusterConfigOperator did not delete the ImageDigestMirrorSet (IDMS) object after a user removed the ImageContentSources field from the HostedCluster object. This caused the IDMS object to remain in the HostedCluster object. With this release, HostedClusterConfigOperator removes all IDMS resources in the HostedCluster object so that this issue no longer exists. (OCPBUGS-37174)
Previously, when the Cloud Credential Operator checked if passthrough mode permissions were correct, the Operator sometimes received a response from the Google Cloud Platform (GCP) API about an invalid permission for a project. This bug caused the Operator to enter a degraded state that in turn impacted the installation of the cluster. With this release, the Cloud Credential Operator checks specifically for this error so that it diagnoses it separately without impacting the installation of the cluster. (OCPBUGS-37288)
Previously, the OVNKubernetesNorthdInactive alert did not fire as expected. With this release, the OVNKubernetesNorthdInactive alert works as expected and the issue is resolved. (OCPBUGS-36821)

1.9.11.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.12. RHSA-2024:4955 - OpenShift Container Platform 4.15.25 bug fix and security update

Issued: 7 August 2024

OpenShift Container Platform release 4.15.25, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:4955 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:4958 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.25 --pullspecs

1.9.12.1. Enhancements

The following enhancements are included in this z-stream release:

1.9.12.1.1. Configuring Capacity Reservation by using machine sets

OpenShift Container Platform release 4.15.25 introduces support for on-demand Capacity Reservation with Capacity Reservation groups on Microsoft Azure clusters. For more information, see Configuring Capacity Reservation by using machine sets for compute or control plane machine sets. (OCPCLOUD-1646)

1.9.12.2. Bug fixes

Previously, a machine config pool (MCP) with a higher maxUnavailable value than the amount of unavailable nodes would cause cordoned nodes to receive updates if they were in a certain position on the node list. With this release, a fix ensures that cordoned nodes are not added to a queue to receive updates. (OCPBUGS-37629)
Prevously, an errant code change resulted in a duplicated oauth.config.openshift.io item on the Global Configuration page. With this release, the duplicated item is removed. (OCPBUGS-37458)
Previously, the Cluster Network Operator (CNO) IPsec mechanism incorrectly behaved on a cluster that had multiple worker machine config pools. With this release, CNO Ipsec mechanism works as intended for a cluster with multiple worker machine config pools. This fix does not apply to updating an IPsec-enabled cluster with multiple paused machine config pools. (OCPBUGS-37205)
Previously, the Open vSwitch (OVS) pinning procedure set the CPU affinity of the main thread, but other CPU threads did not pick up this affinity if they had already been created. As a consequence, some OVS threads did not run on the correct CPU set, which might interfere with the performance of pods with a Quality of Service (QoS) class of Guaranteed. With this release, the OVS pinning procedure updates the affinity of all the OVS threads, ensuring that all OVS threads run on the correct CPU set. (OCPBUGS-37196)
Previously, when you created or deleted large volumes of service objects simultaneously, the service controller’s ability to process each service sequentially would slow down. This caused short timeout issues for the service controller and backlog issues for the objects. With this release, the service controller can now process up to 10 service objects simultaneously to reduce the backlog and timeout issues. (OCPBUGS-36821)

1.9.12.3. Known issues

On clusters with the SR-IOV Network Operator installed and configured, pods with a secondary interface of SRI-OV VF fail to create a pod sandbox and do not function. (OCPBUGS-38090)

1.9.12.4. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.13. RHSA-2024:4850 - OpenShift Container Platform 4.15.24 bug fix and security update

Issued: 31 July 2024

OpenShift Container Platform release 4.15.24, which includes security updates, is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:4850 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:4853 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.24 --pullspecs

1.9.13.1. Bug fixes

Previously, the TuneD daemon could unnecessarily reload an additional time after a Tuned custom resource (CR) update. With this release, the Tuned object has been removed and the TuneD (daemon) profiles are carried directly in the Tuned Profile Kubernetes objects. As a result, the issue has been resolved. (OCPBUGS-36870)

1.9.13.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.14. RHSA-2024:4699 - OpenShift Container Platform 4.15.23 bug fix and security update

Issued: 25 July 2024

OpenShift Container Platform release 4.15.23 is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:4699 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:4702 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.23 --pullspecs

1.9.14.1. Enhancements

The following enhancement is included in this z-stream release:

1.9.14.1.1. Adding connectTimeout tuning option to Ingress Controller API

The IngressController API is updated with a new tuning option, ingresscontroller.spec.tuningOptions.connectTimeout, which defines how long the router will wait for a response when establishing a connection to a backend server. (OCPBUGS-36208)

1.9.14.2. Bug fixes

Previously, the OpenSSL versions for the Machine Config Operator and the hosted control plane were not the same. With this release, the FIPS cluster NodePool resource creation for OpenShift Container Platform 4.14 and OpenShift Container Platform 4.15 has been fixed and the issue is resolved. (OCPBUGS-37266)
Previously, the operand details displayed information for the first custom resource definition (CRD) that matched by name. With this release, the operand details page displays information for the CRD that matches by name and the version of the operand. (OCPBUGS-36971)
Previously, the HyperShift hosted control plane (HCP) would fail to generate ignition because of mismatched versions of Red Hat Enterprise Linux (RHEL) OpenSSL versions used by the HyperShift Control Plane Operator and the Machine Config Operator. With this release, the versions of Red Hat Enterprise Linux (RHEL) OpenSSL match correctly and the issue is resolved. (OCPBUGS-36863)
Previously, the Ingress Operator could not successfully update the canary route because the Operator did not have permission to update spec.host or spec.subdomain on an existing route. With this release, the required permission is added to the cluster role for the Operator’s ServiceAccount and the Ingress Operator can update the canary route. (OCPBUGS-36466)
Previously, installing an Operator could sometimes fail if the same Operator had been previously installed and uninstalled. This was due to a caching issue. This bug fix updates {olm} to correctly install the Operator in this scenario, and as a result this issue no longer occurs. (OCPBUGS-36451)
Previously, after installing the Pipelines Operator, Pipeline templates took some time to become available in the cluster, but users were still able to create the Deployment. With this update, the Create button on the Import from Git page is disabled if there is no pipeline template present for the resource selected. (OCPBUGS-34477)

1.9.14.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.15. RHSA-2024:4474 - OpenShift Container Platform 4.15.22 bug fix and security update

Issued: 18 July 2024

OpenShift Container Platform release 4.15.22 is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:4474 advisory. There are no RPM packages in this release.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.22 --pullspecs

1.9.15.1. Enhancements

The following enhancement is included in this z-stream release:

1.9.15.1.1. Introducing TaskRun status

Previously, the TaskRun status was not displayed near the TaskRun name on the TaskRun details page. With this update, the TaskRun status is located beside the name of the TaskRun in the page heading. (OCPBUGS-32156)

1.9.15.2. Bug fixes

Previously, the HighOverallControlPlaneCPU alert triggered warnings based on criteria for multi-node clusters with high availability. As a result, misleading alerts were triggered in single-node OpenShift clusters because the configuration did not match the environment criteria. This update refines the alert logic to use single-node OpenShift-specific queries and thresholds and account for workload partitioning settings. As a result, CPU utilization alerts in single-node OpenShift clusters are accurate and relevant to single-node configurations. (OCPBUGS-35832)
In an AWS STS cluster, the Cloud Credential Operator (CCO) checks awsSTSIAMRoleARN in CredentialsRequest to create the secret. Previously, CCO logged an error if awsSTSIAMRoleARN was not present, which resulted in multiple errors per second. With this release, CCO does not log the error and the issue is resolved. (OCPBUGS-36291)
Previously, if a new deployment was completed at the OSTree level on a host that was identical to the current deployment but on a different stateroot, OSTree treated them as equal. With this release, the OSTree logic is modified and the issue is resolved. (OCPBUGS-36436)
Previously, a change of dependency targets introduced in OpenShift Container Platform 4.14 prevented Microsoft Azure OpenShift Container Platform installations from scaling up new nodes after upgrading to later versions. With this release, the issue is resolved for OpenShift Container Platform 4.15. (OCPBUGS-36550)

1.9.15.3. Known issue

If the ConfigMap object maximum transmission unit (MTU) is absent in the openshift-network-operator namespace, you must create the ConfigMap object manually with the machine MTU value before you start the live migration. Otherwise, the live migration fails. (OCPBUGS-35829)

1.9.15.4. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.16. RHSA-2024:4321 - OpenShift Container Platform 4.15.21 bug fix and security update

Issued: 10 July 2024

OpenShift Container Platform release 4.15.21 is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:4321 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:4324 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.21 --pullspecs

1.9.16.1. Bug fixes

Previously, the alertmanager-trusted-ca-bundle config map was not injected into the user-defined Alertmanager container, which prevented the verification of HTTPS web servers receiving alert notifications. With this update, the trusted CA bundle config map is mounted into the Alertmanager container at the /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem path. (OCPBUGS-36312)
Previously, the internal image registry did not correctly authenticate users on clusters configured for externalAWS IAM OpenID Connect (OIDC) users. This causes issues for users when pushing or pulling images to and from the internal image registry. With this release, the internal image registry starts by using the SelfSubjectReview API instead of the OpenShift-specific user API. The OpenShift-specific user API is not compatible with external OIDC users. (OCPBUGS-36287)
Previously, for clusters upgraded from earlier versions of OpenShift Container Platform, enabling kdump on an OVN-enabled cluster sometimes prevented the node from rejoining the cluster or returning to the Ready state. With this release, stale data from earlier OpenShift Container Platform versions are removed, so that nodes can now correctly start and rejoin the cluster. (OCPBUGS-36258)
Previously, the OpenShift Container Platform installation program included a pair of slashes (//) in a path to a resource pool for a cluster installed on VMware vSphere. This issue caused the ControlPlaneMachineSet (CPMS) Operator to create additional contol plane machines. With this release, the pair of slashes is removed to prevent this issue from occuring. (OCPBUGS-36225)
Previously, the GrowPart tool locked a device. This impacted Linux Unified Key Setup-on-disk-format (LUKS) devices from being opened and caused the operating system to boot into emergency mode. With this release, the call to the GrowPart tool is removed, so that LUKS devices are not unintentionally locked and the operating system can successfully boot. (OCPBUGS-35988)
Previously, a bug in systemd might cause the coreos-multipath-trigger.service unit to hang forever. As a result, the system would never finish booting. With this release, the systemd unit was removed and the issue is fixed. (OCPBUGS-35749)
Previously, a transient failure to fetch bootstrap data during machine creation, such as a transient failure to connect to the API server, caused the machine to enter a terminal failed state. With this release, failure to fetch bootstrap data during machine creation is retried until it eventually succeeds. (OCPBUGS-34665)

1.9.16.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.17. RHSA-2024:4151 - OpenShift Container Platform 4.15.20 bug fix and security update

Issued: 2 July 2024

OpenShift Container Platform release 4.15.20 is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:4151 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:4154 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.20 --pullspecs

1.9.17.1. Enhancements

The following enhancements are included in this z-stream release:

1.9.17.1.1. Enabling imagestream builds in disconnected environments

This release adds additional TrustedBundles to the OpenShift API server (OAS) container and enables imagestream builds in disconnected environments. (OCPBUGS-34579)

1.9.17.1.2. Collecting the Prometheus and Alert Manager instances by the Insights Operator

The Insights Operator (IO) now collects the Prometheus and AlertManager resources in addition to the openshift-monitoring custom resource. (OCPBUGS-35865)

1.9.17.2. Bug fixes

Previously, when an optional internal function of the cluster autoscaler was not implemented, the function caused repeated log entries. With this release, the issue has been resolved. (OCPBUGS-33885)
Previously, default Operator Lifecycle Manager (OLM) catalog pods remained in a termination state when there was an outage of the node that was being used. With this release, the OLM catalog pods that are backed by a CatalogSource correctly recover from planned and unplanned node maintenance. (OCPBUGS-35305).
Previously, what the Azure API returns for a subnet caused the Installer to terminate unexpectedly. With this release, the code has been updated to handle the old and new data for subnets, as well as to return an error in case the expected information is not found. (OCPBUGS-35502).
Previously, AWS HyperShift clusters leveraged their VPC’s primary CIDR range to generate security group rules on the data plane. As a consequence, installing AWS HyperShift clusters into an AWS VPC with multiple CIDR ranges caused the generated security group rules to be insufficient. With this release, security group rules are generated based on the provided Machine CIDR range instead to resolve this issue. (OCPBUGS-35714)
Previously, in User Provisioned Infrastructure (UPI) or clusters that were upgraded from older versions, failureDomains may be missing in Infrastructure objects which caused certain checks to fail. With this release, a fallback failureDomains is synthesized from cloudConfig if none are available in infrastructures.config.openshift.io. (OCPBUGS-35732)
Previously, a rare timing issue could prevent all control plane nodes from being added to an Agent-based cluster during installation. With this update, all control plane nodes are successfully rebooted and added to the cluster during installation. (OCPBUGS-35894)

1.9.17.3. Known issue

Compact clusters with 3 masters that are configured to run customer workloads are supported with OpenShift IPI installs on GCP, but not on AWS or Azure. (OCPBUGS-35359)

1.9.17.4. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.18. RHSA-2024:4041 - OpenShift Container Platform 4.15.19 bug fix and security update

Issued: 27 June 2024

OpenShift Container Platform release 4.15.19 is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:4041 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:4044 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.19 --pullspecs

1.9.18.1. Bug fixes

Previously, when a new version of a Custom Resource Definition (CRD) specified a new conversion strategy, this conversion strategy was expected to successfully convert resources. This was not the case because Operator Lifecycle Manager (OLM) cannot run the new conversion strategies for CRD validation without actually performing the update operation. With this release, the OLM implementation generates a warning message during the update process when CRD validations fail with the existing conversion strategy and the new conversion strategy is specified in the new version of the CRD. (OCPBUGS-35720).
Previously, during node reboots, especially during update operations, the node that interacts with the rebooting machine entered a Ready=Unknown state for a short amount of time. This situation caused the Control Plane Machine Set Operator to enter an UnavailableReplicas condition and then an Available=false state. The Available=false state triggers alerts that demand urgent action, but in this case, intervention was only required for a short period of time until the node rebooted. With this release, a grace period for node unreadiness is provided where if a node enters an unready state, the Control Plane Machine Set Operator does not instantly enter an UnavailableReplicas condition or an Available=false state. (OCPBUGS-34971).
Previously, the OpenShift Cluster Manager container did not have the right TLS Certificates. As a result, image streams could not be used in disconnected deployments. With this update, the TLS Certificates are added as projected volumes. (OCPBUGS-34580)
Previously, when a serverless function was created in the create serverless form, BuilldConfig was not created. With this update, if the Pipelines Operator is not installed, or if the pipeline resource is not created for particular resource, or if the pipeline is not added while creating a serverless function, the BuildConfig is created as expected. (OCPBUGS-34350)
Previously, the reduction of the network queue did not work as expected for inverted rules such as !ens0. This happened because the exclamation mark symbol was duplicated in the generated tuned profile. With this release, the duplication no longer occurs so that inverted rules apply as intended. (OCPBUGS-33929).
Previously, registry overrides configured by a cluster administrator on the management side applied to non-relevant data-plane components. With this release, registry overrides no longer apply to these components. (OCPBUGS-33627).
Previously, when installing a cluster on VMware vSphere, the installation failed if an ESXi host was in maintenance mode because the installation program could not retrieve version information from the host. With this update, the installation program does not attempt to retrieve version information from ESXi hosts that are in maintenance mode, allowing the installation to proceed. (OCPBUGS-31387)

1.9.18.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.19. RHSA-2024:3889 - OpenShift Container Platform 4.15.18 bug fix and security update

Issued: 18 June 2024

OpenShift Container Platform release 4.15.18 is now available. The list of bug fixes that are included in this update is documented in the RHSA-2024:3889 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:3892 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.18 --pullspecs

1.9.19.1. Enhancements

The following enhancements are included in this z-stream release:

1.9.19.1.1. Blocking upgrades for SHA1 serving certificates on routes and Ingress Controllers

OpenShift Container Platform 4.15 supports SHA1 certificates on routes, but sets Upgradeable=False. Consequently, upgrades from 4.15 to 4.16 cause routes and Ingress Controllers with SHA1 certificates to be rejected.
Only serving certificates are affected. For routes, this is the certificate specified in spec.tls.certificate. For Ingress Controllers, this is the serving certificate in the secret specified in spec.defaultCertificate. CA certificates using SHA1 are not impacted. However, due to OCPBUGS-42480, some Ingress Controllers were incorrectly blocking upgrades if the serving certificate was not using SHA1, but the CA certificate was. To resolve this, upgrade to version 4.15.37 to receive this bug fix.
Additionally, this update introduces a new UnservableInFutureVersions status condition to routes that contain a SHA1 certificate. It also adds an admin-gate to block upgrades if this new status is present on any route. As a result, if cluster administrators have routes that use SHA1 certificates in OpenShift Container Platform 4.15, they must either upgrade these certificates to a supported algorithm or provide an admin-ack for the created admin-gate. This admin-ack allows administrators to proceed with the upgrade without resolving the SHA1 certificate issues, even though the routes will be rejected. The full admin-ack command is:
```
$ oc -n openshift-config patch cm admin-acks --patch '{"data":{"ack-4.15-route-config-not-supported-in-4.16":"true"}}' --type=merge
```
(OCPBUGS-28928).

1.9.19.1.2. Allowing pull secret passwords to contain a colon character

This release introduces the ability to include a colon character in your password for the Openshift Assisted Installer. (OCPBUGS-34641)

1.9.19.1.3. Introducing an etcd defragmentation controller for Hypershift

This release introduces an etcd degragmentation controller for hosted clusters on Hypershift. (OCPBUGS-35002)

1.9.19.2. Bug fixes

Previously, the OpenShift Container Platform web console terminated unexpectedly if authentication discovery failed on the first attempt. With this update, authentication initialization was updated to retry up to 5 minutes before failing. (OCPBUGS-30208)
Previously, the metal3-ironic and metal3-ironic-inspector pods failed when upgrading to OpenShift Container Platform 4.15.11 from 4.15.8 due to an install failure related to FIPS mode enablement. With this release, the issue has been resolved. (OCPBUGS-33736)
Previously, the OpenShift Agent Installer reported installed SATA SDDs as removable and refused to use any of them as installation targets. With this release removable disks are eligible for installation and the issue has been resolved. (OCPBUGS-34732)
Previously, the AWS EFS driver controller returned a runtime error when it provisioned a new volume on EFS filesystem if pre-existing access points without a POSIX user were present. With this release, the driver has been fixed and the issue has been resolved. (OCPBUGS-34843)
Previously, the secrets-store CSI driver on Hypershift was failing to mount secrets due to an issue with the Hypershift CLI. With this release, the driver is able to mount volumes and the issue has been resolved. (OCPBUGS-34997)
Previously, in disconnected environments, the HyperShift Operator ignored registry overrides. As a consequence, changes to node pools were ignored, and node pools encountered errors. With this update, the metadata inspector works as expected during the HyperShift Operator reconciliation, and the override images are properly populated. (OCPBUGS-35074)

1.9.19.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.20. RHBA-2024:3673 - OpenShift Container Platform 4.15.17 bug fix and security update

Issued: 11 June 2024

OpenShift Container Platform release 4.15.17 is now available. The list of bug fixes that are included in this update is documented in the RHBA-2024:3673 advisory. The RPM packages that are included in this update are provided by the RHSA-2024:3676 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.17 --pullspecs

1.9.20.1. Enhancements

The following enhancement is included in this z-stream release:

1.9.20.1.1. Storage migration for cluster versions 4.8 or earlier

This release introduces a storage migration that supports a safe cluster update from version 4.8 or earlier to the latest supported release. If you created a cluster at version 4.7 or earlier, your stored objects remain accessible when updating your cluster to the latest supported release. (OCPBUGS-31445)

1.9.20.2. Bug fixes

Previously, when multiple domains were configured for an Amazon Virtual Private Cloud (VPC) DHCP option, the hostname could return multiple values. However, the logic did not account for multiple values and crashed when it returned a node name containing a space. With this release, the logic has been updated to use the first returned hostname as the node name and the issue has been resolved. (OCPBUGS-33847)
Previously, when enabling virtualHostedStyle with regionEndpoint set in the Image Registry Operator configuration, the image registry ignored the virtual hosted style configuration and failed to start. With this release, the image registry uses a new upstream distribution configuration and the issue has been resolved. (OCPBUGS-34539)
Previously, the OperatorHub incorrectly excluded the Amazon Resource Name (ARN) role information for ROSA Hosted Control Plane (HCP) clusters. With this update, the OperatorHub correctly displays ARN information and the issue has been resolved. (OCPBUGS-34550)
Previously, when attempting to delete a cluster or BareMetalHost (BMH) resource before installation, the metal3-operator tried to unnecessarily generate a pre-provisioning image. With this release, an exception has been created to prevent the creation of a pre-provisioning image during a BMH deletion and the issue has been resolved. (OCPBUGS-34682)
Previously, some text areas were no longer resizable when editing a config map in the Form View of the web console in OpenShift Container Platform 4.15. With this release, those text areas are now resizable. (OCPBUGS-34703)

1.9.20.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.21. RHBA-2024:3488 - OpenShift Container Platform 4.15.16 bug fix update

Issued: 5 June 2024

OpenShift Container Platform release 4.15.16 is now available. The list of bug fixes that are included in this update is documented in the RHBA-2024:3488 advisory. The RPM packages that are included in this update are provided by the RHBA-2024:3491 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.16 --pullspecs

1.9.21.1. Bug fixes

Previously, in HAProxy 2.6 deployments on OpenShift Container Platform, shutting down HAproxy could result in a race condition. The main thread (tid=0) would wait for other threads to complete, but some threads would enter an infinite loop, consuming 100% CPU. With this release, the variable controlling the loop’s termination is now properly reset, preventing non-main threads from looping indefinitely. This ensures that the thread’s poll loop can terminate correctly. (OCPBUGS-33883)
Previously, the console Operator health check controller had a missing return statement, which caused the Operator to crash unexpectedly in some cases. With this release, the issue has been fixed. (OCPBUGS-33720)
Previously, the wait-for-ceo command used during the bootstrapping process to verify etcd rollout did not report errors for some failure modes. With this release, those error messages are visible on the bootkube script if the wait-for-ceo command exits in an error case. (OCPBUGS-33564)

1.9.21.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.22. RHSA-2024:3327 - OpenShift Container Platform 4.15.15 bug fix and security update

Issued: 29 May 2024

OpenShift Container Platform release 4.15.15, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:3327 advisory. The RPM packages that are included in the update are provided by the RHBA-2024:3332 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.15 --pullspecs

1.9.22.1. Bug fixes

Previously, certain situations caused transfer of an Egress IP address from one node to a different node to fail, and this failure impacted the OVN-Kubernetes network. The network failed to send gratuitous Address Resolution Protocol (ARP) requests to peers to inform them of the new node’s medium access control (MAC) address. As a result, peers would temporarily send reply traffic to an old node and this traffic led to failover issues. With this release, the OVN-Kubernetes network correctly sends a gratuitous ARP to peers to inform them of the new Egress IP node MAC address, so that each peer can send reply traffic to the new node without causing failover time issues. (OCPBUGS-33960)
Previously, when mirroring Operator catalogs, the oc-mirror CLI plugin rebuilt the catalogs and regenerated the catalog’s internal cache according to the imagesetconfig catalog filtering specifications. This operation required the use of the opm binary found within the catalogs. In OpenShift Container Platform 4.15, Operator catalogs include the opm Red Hat Enterprise Linux (RHEL) 9 binary, and this caused the mirroring process to fail when running on RHEL 8 systems. With this release, oc-mirror no longer builds catalogs by default. Instead, catalogs are mirrored directly to their destination registries. (OCPBUGS-33575)
Previously, the image registry did not support Amazon Web Services (AWS) region ca-west-1. With this release, the image registry can now be deployed in this region. (OCPBUGS-33672)
Previously, service accounts (SAs) could not be used as OAuth2 clients because there were no tokens associated with the SAs. With this release, the OAuth registry client has been modified to anticipate this case and the issue has been resolved. (OCPBUGS-33210)
Previously, the proxy information set in the install-config.yaml file was not applied to the bootstrap process. With this release, the proxy information is applied to the bootstrap Ignition data which is applied to the bootstrap machine and the issue has been resolved. (OCPBUGS-33205)
Previously, the information from the imageRegistryOverrides setting was only extracted once on the HyperShift Operator initialization and did not refresh. With this release, the Hypershift Operator retrieves the new ImageContentSourcePolicy files from the management cluster and adds them to the Hypershift Operator and Control Plane Operator in every reconciliation loop. (OCPBUGS-33117)
Previously, the Hypershift Operator was not using the RegistryOverrides mechanism to inspect the image from the internal registry. With this release, the metadata inspector works as expected during the Hypershift Operator reconciliation, and the OverrideImages are properly populated. (OCPBUGS-32220)
Previously, attempting to update the VMware vSphere connection configuration for OpenShift Container Platform failed if the configuration included ”” characters. With this release, the characters are stored correctly and the issue has been resolved. (OCPBUGS-31863)

1.9.22.2. Known issue

Previously, after upgrading to OpenShift Container Platform 4.15.6, attempting to use the oc-mirror CLI plugin within a cluster failed. With this release, there is now a FIPS-compliant version of oc-mirror for RHEL 9 and a version of oc-mirror for RHEL 8 that is not FIPS-compliant. (OCPBUGS-31609)

1.9.22.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.23. RHSA-2024:2865 - OpenShift Container Platform 4.15.14 bug fix and security update

Issued: 21 May 2024

OpenShift Container Platform release 4.15.14, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:2865 advisory. The RPM packages that are included in the update are provided by the RHBA-2024:2870 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.14 --pullspecs

1.9.23.1. Bug fixes

Previously, if traffic was forwarded to terminating endpoints that were not functioning, communications problems occured unless the readiness probes on these endpoints were configured to quickly flag the endpoints as not serving. This occurred because the the endpoint selection for services partially implemented KEP-1669 ProxyTerminatingEndpoints traffic to services inside the OpenShift Container Platform cluster. As a result, this traffic was forwarded to all endpoints that were either ready, such as ready=true, serving=true, terminating=false, or terminating and serving, such as ready=false, serving=true, terminating=true. This caused communication issues when traffic was forwarded to terminating endpoints and the readiness probes on these endpoints were not configured to quickly flag the endpoints as not serving, serving=false, when they were no longer functional. With this release, the endpoints selection logic now fully implements KEP-1669 ProxyTerminatingEndpoints for any given service so that all ready endpoints are selected. If no ready endpoints are found, functional terminating and serving endpoints are used.(OCPBUGS-27852)
Previously, if you configured an OpenShift Container Platform cluster with a high number of internal services or user-managed load balancer IP addresses, you experienced a delayed startup time for the OVN-Kubernetes service. This delay occurred when the OVN-Kubernetes service attempted to install iptables rules on a node. With this release, the OVN-Kubernetes service can process a large number of services in a few seconds. Additionally, you can access a new log to view the status of installing iptables rules on a node. (OCPBUGS-32426)
Previously, some container processes created by using the exec command persisted even when CRI-O stopped the container. Consequently, lingering processes led to tracking issues, causing process leaks and defunct statuses. With this release, CRI-O tracks the exec calls processed for a container and ensures that the processes created as part of the exec calls are terminated when the container is stopped. (OCPBUGS-32481)
Previously, the Topology view in the OpenShift Container Platform web console did not show the visual connector between a virtual machine (VM) node and other non-VM components. With this release, the visual connector shows interaction activity of a component. (OCPBUGS-32505)
Previously, a logo in the masthead element of the OpenShift Container Platform web console could grow beyond 60 pixels in height. This caused the masthead to increase in height. With this release, the masthead logo is constrained to a max-height of 60 pixels. (OCPBUGS-33548)
Previously, if you need the Form view in the OpenShift Container Platform web console to remove an alternate service from a Route resource, the alternate service remained in the cluster. With this release, if you delete an alternate service in this way, the alternate service is fully removed from the cluster. (OCPBUGS-33058)
Previously, OpenShift Container Platform cluster connections to the Microsoft Azure API were delayed because of an issue with the API’s codebase. With this release, a timeout schedule is set for any calls to the Azure API, so that an API call that hangs for a period of time is terminated. (OCPBUGS-33127)
Previously, a kernel regression that was introduced in OpenShift Container Platform 4.15.0 caused kernel issues, such as nodes crashing and rebooting, in nodes that mounted to CephFS storage. In this release, the regression issue is fixed so that the kernel regression issue no longer occurs. (OCPBUGS-33250)
Previously, the VMware vSphere Problem Detector Operator did not have HTTP and HTTPS proxies configured for it. This resulted in invalid cluster configuration error messages because connection issues between the Operator and the VMware vSphere vCenter server. With this release, the vSphere Problem Detector Operator uses the same HTTP and HTTPS proxies as other OpenShift Container Platform cluster Operators so that the vSphere Problem Detector Operator can connect to the VMware vSphere vCenter. (OCPBUGS-33466)
Previously, Alertmanager would send notification emails that contained a backlink to the Thanos Querier web interface. This web interface is an unreachable web service. With this release, monitoring alert notification emails contain a backlink to the OpenShift Container Platform web console’s *Alerts page. (OCPBUGS-33512)

1.9.23.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.24. RHSA-2024:2773 - OpenShift Container Platform 4.15.13 bug fix and security update

Issued: 15 May 2024

OpenShift Container Platform release 4.15.13, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:2773 advisory. The RPM packages that are included in the update are provided by the RHSA-2024:2776 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.13 --pullspecs

1.9.24.1. Bug fixes

Previously, the name of the Security Context Constraint (SCC) was incorrect so there was no functioning built-in cluster role. With this release, the name was changed to hostmount-anyuid and the SCC now has a functioning built-in cluster role. (OCPBUGS-33277)
Previously, the Ironic Python Agent (IPA) failed when trying to wipe disks because it expected the wrong byte sector size, which caused the node provisioning to fail. With this release, the IPA checks the disk sector size and node provisioning succeeds. (OCPBUGS-33133)
Previously, Static Persistent Volumes in Azure File on Workload Identity clusters could not be configured due to a bug in the driver causing volume mounts to fail. With this release, the driver has now been fixed, and Static Persistent Volumes mount correctly. (OCPBUGS-33038)
Previously, during OpenShift Container Platform updates in performance-tuned clusters, resuming a MachineConfigPool resource resulted in additional restarts for nodes in the pool. This was due to the performance profile controller reconciling against outdated machine configurations while the pool was paused. With this update, the controller reconciles against the latest planned machine configurations before the pool resumes, preventing additional node reboots. (OCPBUGS-32978)
Previously, the load balancing algorithm did not differentiate between active and inactive services when determining weights, and it employed the random algorithm excessively in environments with many inactive services or environments routing backends with weight 0. This led to increased memory usage and a higher risk of excessive memory consumption. With this release, changes are made to optimize traffic direction towards active services only and prevent unnecessary use of the random algorithm with higher weights, reducing the potential for excessive memory consumption. (OCPBUGS-32977)
Previously, If a user created a ContainerRuntimeConfig resource as an extra manifest for a single-node OpenShift Container Platform cluster (SNO) installation, the boostrap process failed with the error: more than one ContainerRuntimeConfig found that matches MCP labels. With this release, the incorrect processing of ContainerRuntimeConfig resources is fixed, which resolves the issue. (OCPBUGS-30152)
Previously, the Helm Plugin index view did not display the same number of charts as the Helm CLI if the chart names varied. With this release, the Helm catalog now looks for charts.openshift.io/name and charts.openshift.io/provider so that all versions are grouped together in a single catalog title. (OCPBUGS-32716)
Previously, the description of the hosted control plane CLI flag api-server-address was unclear. With this release, the description has been updated for clarity and completeness. (OCPBUGS-25858)

1.9.24.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.25. RHSA-2024:2664 - OpenShift Container Platform 4.15.12 bug fix and security update

Issued: 9 May 2024

OpenShift Container Platform release 4.15.12, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:2664 advisory. The RPM packages that are included in the update are provided by the RHSA-2024:2669 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.12 --pullspecs

1.9.25.1. Enhancements

The following enhancements are included in this z-stream release:

1.9.25.1.1. API version for the ClusterTriggerBinding, TriggerTemplate, and EventListener CRDs upgraded from v1alpha1 to v1beta1

Previously, the API version for the ClusterTriggerBinding, TriggerTemplate, and EventListener CRDs was v1alpha1. With this release, the API version is upgraded to v1beta1 so that the pipelines plugin supports the latest Pipeline Trigger API version for the ClusterTriggerBinding, TriggerTemplate, and EventListener CRDs. (OCPBUGS-31445)

1.9.25.1.2. PipelineRun list view performance improvement

Previously, in the PipelineRun list page, all of the TaskRun objects were fetched and separated based on their PipelineRun name. With this release, TaskRun objects are only fetched for failed and cancelled PipelineRun objects, and a caching mechanism is added to fetch the PipelineRun and TaskRun objects that are associated with the failed and cancelled PipelineRun objects. (OCPBUGS-31799)

1.9.25.1.3. Installer handles the escaping of the % character

Previously, if a cluster was installed using a proxy, and the proxy information contained escaped characters in the format %XX, the installation failed. With this release, the installer now handles the escaping of the % character. (OCPBUGS-32259)

1.9.25.1.4. Cluster Fleet Evaluation status information added to the Machine Config Operator

Previously, the Machine Config Operator (MCO) did not include the Cluster Fleet Evaluation (CFE) status. With this release, the CFE status information is added to the MCO and available to customers. (OCPBUGS-32922)

1.9.25.1.5. OperatorHub filter renamed from FIPS Mode to Designed for FIPS

Previously, OperatorHub included a filter named FIPS Mode. With this release, that filter is named Designed for FIPS. (OCPBUGS-32933)

1.9.25.2. Bug fixes

Previously, containers had an incorrect view of the pids limit in their cgroup hierarchy and reported as a random number instead of max. The containers do not have max PIDs and are limited by the pod PID limit, which is set outside of the container’s cgroup hierarchy and not visible from within the container. With this release, the issue has been resolved. (OCPBUGS-28926)
Previously, for OpenShift Container Platform deployments on Red Hat OpenStack Platform (RHOSP), the MachineSet object did not correctly apply the value for the Port Security parameter. With this release, the MachineSet object applies the port_security_enabled flag as expected. (OCPBUGS-30857)
Previously, the installation program erroneously attempted to verify the libvirt network interfaces when an agent-based installation was configured with the openshift-baremetal-install binary. With this release, the agent installation method does not require libvirt and this validation is disabled. (OCPBUGS-30944)
Previously, the cpuset-configure.sh script could run before all of the system processes were created. With this release, the script is only triggered to run when CRI-O is initialized and the issue is resolved. (OCPBUGS-31692)
Previously, an incorrect dnsPolicy was used for the konnectivity-agent daemon set in the data plane. As a result, when CoreDNS was down, konnectivity-agent pods on the data plane could not resolve the proxy-server-address and could fail the konnectivity-server in the control plane. With this release, konnectivity-agent uses the host system DNS service to lookup the proxy-server-address and no longer depends on CoreDNS. (OCPBUGS-31826)
Previously, if gathering logs from the bootstrap node failed during the gather bootstrap execution, the virtual machine (VM) serial console logs were not included in the gather output even if they were collected. With this release, serial logs are always included if they are collected. (OCPBUGS-32264)
Previously, port 22 was missing from the compute node’s security group in AWS SDK installations, therefore connecting to the compute nodes with SSH failed when users used AWS SDK provisioning. With this release, port 22 is added to the compute node’s security group and the issue is resolved. (OCPBUGS-32383)
Previously, the installation program required the s3:HeadBucket permission for AWS, even though it does not exist. The correct permission for the HeadBucket action is s3:ListBucket. With this release, s3:HeadBucket is removed from the list of required permissions and only s3:ListBucket is required, as expected. (OCPBUGS-32690)
Previously, there was an issue with OpenShift Container Platform Ansible upgrades because the IPsec configuration was not idempotent. With this release, changes are made to the OpenShift Container Platform Ansible playbooks, ensuring that all IPsec configurations are idempotent. (OCPBUGS-33102)

1.9.25.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.26. RHSA-2024:2068 - OpenShift Container Platform 4.15.11 bug fix and security update

Issued: 2 May 2024

OpenShift Container Platform release 4.15.11, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:2068 advisory. The RPM packages that are included in the update are provided by the RHSA-2024:2071 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.11 --pullspecs

1.9.26.1. Enhancements

The following enhancements are included in this z-stream release:

1.9.26.1.1. Increased the number of supported nodes on the Topology view

Previously, the OpenShift Container Platform web console Topology view could only display a maximum of 100 nodes. If you attempted to view more than 100 nodes, the web console would output a Loading is taking longer than expected. error message. With this release, the MAX_NODES_LIMIT parameter for the web console is set to 200, so that the web console can display a maximum of 200 nodes. (OCPBUGS-32340)

1.9.26.1.2. Added `gcr` and `acr` RHEL credential providers

OpenShift Container Platform 4.15 includes gcr and acr Red Hat Enterprise Linux (RHEL) credential providers so that future upgrades to later versions of OpenShift Container Platform that require RHEL compute nodes deployed on a cluster do not result in a failed installation. (OCPBUGS-30970)

1.9.26.1.3. Added permission for reading the `featureGates` resource to RBAC rule

OpenShift Container Platform 4.15 adds a permission to the role-based access control (RBAC) rule so that the DNS Operator can read the featureGates resource. Without this permission, an upgrade operation to a later version of OpenShift Container Platform could fail. (OCPBUGS-32093)

1.9.26.2. Bug fixes

The installation of OpenShift Container Platform failed when a performance profile was located in the extra manifests folder and targeted master or worker node roles. This was caused by the internal installation that processes the performance profile before the default master or worker node roles were created. With this release, the internal installation processes the performance profile after the node roles are created so that this issue no longer exists. (OCPBUGS-27948)
Previously, the image registry did not support Amazon Web Services (AWS) region ca-west-1. With this release, the image registry can now be deployed in this region. (OCPBUGS-31641)
Previously, a cluster upgraded to OpenShift Container Platform 4.14 or later experienced router pods unexpectedly closing keep-alive connections that caused traffic degradation issues for Apache HTTP clients. This issue was caused by router pods using a version of an HAProxy router that closed idle connections after the HAProxy router was restarted. With this release, the pods use a version of an HAProxy router that includes an idle-close-on-response option. The HAProxy router now waits for the last request and response transaction before the idle connection is closed. (OCPBUGS-32435)
Previously, a Redfish virtual media Hewlett Packard Enterprise (HPE) integrated Lights Out (iLO) 5 bare-metal machine’s compression was forcibly disabled to workaround other unrelated issues in different hardware models. This caused the FirmwareSchema resource to be missing from each iLO 5 bare-metal machine. Each machine needs compression to fetch message registries from their Redfish Baseboard Management Controller (BMC) endpoints. With this release, each iLO 5 bare-metal machine that needs the FirmwareSchema resource does not have compression forcibly disabled. (OCPBUGS-31686)
Previously, nodes of paused MachineConfigPools might have their pause status dropped when performing a cluster update. With this release, nodes of paused MachineConfigPools correctly stay paused when performing a cluster update. (OCPBUGS-31839)
Previously, newer versions of Redfish used Manager resources to deprecate the Uniform Resource Identifier (URI) for the RedFish Virtual Media API. This caused any hardware that used the newer Redfish URI for Virtual Media to not be provisioned. With this release, the Ironic API identifies the correct Redfish URI to deploy for the RedFish Virtual Media API so that hardware relying on either the deprecated or the newer URI could be provisioned. (OCPBUGS-31830)
Previously, the Cloud Credential Operator (CCO) checked for a non-existent s3:HeadBucket permission during the validation checks in mint mode that resulted in a failed cluster installation. With this release, CCO removes the validation check for this non-existing permission so that validation checks pass in mint mode and the cluster installation does not fail. (OCPBUGS-31924)
Previously, a new Operator Lifecycle Manager (OLM) Operator that upgraded to OpenShift Container Platform 4.15.3 resulted in failure because important resources were not injected into the upgrade operation. With this release, these resources are now cached so that newer OLM Operator upgrades can succeed. (OCPBUGS-32311)
Previously, the Red OpenShift Container Platform web console did not require the Creator field as a mandatory field. API changes specified an empty value for this field, but a user profile could still create silent alerts. With this release, the API marks the Creator field as a mandatory field for a user profile that needs to create silent alerts. (OCPBUGS-32097)
Previously, in hosted control planes for OpenShift Container Platform, when you created the custom resource definition (CRD) for ImageDigestMirrorSet and ImageContentSourcePolicy objects at the same time in a disconnected environment, the HyperShift Operator created the object only for the ImageDigestMirrorSet CRD, ignoring the ImageContentSourcePolicy CRD. With this release, the HyperShift Operator can create objects at the same time for the ImageDigestMirrorSet and ImageContentSourcePolicy CRDs. (OCPBUGS-32164)
Previously, IPv6 networking services that operated in Red Hat OpenStack Platform (RHOSP) environments could not share an IPv6 load balancer that was configured with multiple services because of an issue that mistakenly marks an IPv6 load balancer as Internal to the cluster. With this release, IPv6 load balancers are no longer marked as Internal so that an IPv6 load balancer with multiple services can be shared among IPv6 networking services. (OCPBUGS-32246)
Previously, the control plane machine sets (CPMS) did not allow template names for vSphere in a CPMS definition. With this release, a CPMS Operator fix allows template names for vSphere in the CPMS definition so that this issue no longer persists. (OCPBUGS-32357)
Previously, the control plane machine sets (CPMS) Operator was not correctly handling older OpenShift Container Platform version configurations that had a vSphere definition in the infrastructure custom resource. This would cause cluster upgrade operations to fail and the CPMS Operator to remain in a crashloopback state. With this release, the cluster upgrade operations do not fail because of this issue. (OCPBUGS-32414)
Previously, the image registry’s Azure path fix job incorrectly required the presence of AZURE_CLIENT_ID and TENANT_CLIENT_ID parameters to function. This caused a valid configuration to throw an error message. With this release, adds a check to the Identity and Access Management (IAM) service account key to validate if these parameters are needed, so that a cluster upgrade operation no longer fails. (OCPBUGS-32396)
Previously, a build pod that failed because of a memory limitation would have its pod status changed to Error instead of OOMKilled. This caused these pods to not be reported correctly. The issue would only occur on cgroup v2 nodes. With this release, a pod with a status of OOMKilled is correctly detected and reported. (OCPBUGS-32498)

1.9.26.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.27. RHSA-2024:1887 - OpenShift Container Platform 4.15.10 bug fix and security update

Issued: 26 April 2024

OpenShift Container Platform release 4.15.10, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:1887 advisory. The RPM packages that are included in the update are provided by the RHSA-2024:1892 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.10 --pullspecs

1.9.27.1. Bug fixes

Previously, clusters created before OpenShift Container Platform 4.7 will have had signer keys for api-int endpoint updated unexpectedly when users upgraded to OpenShift Container Platform 4.15 due to the installer deleting the SecretTypeTLS and then recreating the secret with kubernetes.io/tls type. With this release, the issue is resolved by the installer changing the secret type without deleting the secret. (OCPBUGS-31807)
Previously, when users imported image stream tags, ImageContentSourcePolicy (ICSP) was not allowed to co-exist with ImageDigestMirrorSet (IDMS) and ImageTagMirrorSet (ITMS). OpenShift Container Platform ignored any IDMS/ITMS created by the user and favored ICSP. With this release, they are allowed to co-exist since importing image stream tags will now respect IDMS/ITMS when ICSP is also present. (OCPBUGS-31469)
Previously, Terraform would create the compute server group with the policy set for the control plane. As a consequence, the 'serverGroupPolicy' property of the install-config.yaml file was ignored for the compute server group. With this release, the server group policy set in the install-config.yaml file for the compute MachinePool is correctly applied at install-time in the Terraform flow. (OCPBUGS-31335)
Previously, projects that specified a non-intersecting openshift.io/node-selector project selector with pods .spec.nodeName could cause runaway Pod creation in Deployments. With this release, pods with non-intersecting .spec.nodeName are not admitted by the API server which resolves the issue. (OCPBUGS-29922)
Previously, a remote attacker with basic login credentials could check the pod manifest to discover a repository pull secret. With this release, the vulnerability has been fixed. (OCPBUGS-28769)

1.9.27.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.28. RHSA-2024:1770 - OpenShift Container Platform 4.15.9 bug fix and security update

Issued: 16 April 2024

OpenShift Container Platform release 4.15.9, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:1770 advisory. The RPM packages that are included in the update are provided by the RHBA-2024:1773 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.9 --pullspecs

1.9.28.1. Enhancements

The following enhancements are included in this z-stream release:

1.9.28.1.1. Number of configured control plane replicas validated

Previously, the number of control plane replicas could be set to an invalid value, such as 2. With this release, a validation is added to prevent any misconfiguration of the control plane replicas at the ISO generation time. (OCPBUGS-30822)

1.9.28.2. Bug fixes

Previously, saving kdump logs to an SSH target was failing in Open Virtual Network (OVN) deployments. The kdump crash logs were not created to the SSH remote when OVN was configured. With this release, OVS-configurations are no longer run before kdump. (OCPBUGS-30884)
Previously, the coreos-installer CLI tool did not correctly modify, reset, or show the kernel arguments for an ISO generated by the openshift-install agent create image command. With this release, the coreos-installer iso kargs modify <iso>, coreos-installer iso kargs reset <iso>, and coreos-installer iso kargs show <iso> commands all work as expected. (OCPBUGS-30922)
Previously, the services secondary IP family test was failing with dual-stack clusters. With this release, the 30000:32767 traffic range is enabled and the issue has been resolved. (OCPBUGS-31284)

1.9.28.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.29. RHSA-2024:1668 - OpenShift Container Platform 4.15.8 bug fix and security update

Issued: 8 April 2024

OpenShift Container Platform release 4.15.8, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:1668 advisory. There are no RPM packages for this update.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.8 --pullspecs

1.9.29.1. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.30. RHSA-2024:1559 - OpenShift Container Platform 4.15.6 bug fix and security update

Issued: 2 April 2024

OpenShift Container Platform release 4.15.6, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:1559 advisory. The RPM packages that are included in the update are provided by the RHSA-2024:1563 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.6 --pullspecs

1.9.30.1. Known issue

There is a known issue in this release which causes the oc-mirror binary to fail on Red Hat Enterprise Linux (RHEL) 8 systems. Workaround: Use the Red Hat OpenShift Container Platform 4.15.5 oc-mirror binary or extract oc-mirror.rhel8. (OCPBUGS-31609)

1.9.30.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.31. RHSA-2024:1449 - OpenShift Container Platform 4.15.5 bug fix and security update

Issued: 27 March 2024

OpenShift Container Platform release 4.15.5, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:1449 advisory. The RPM packages that are included in the update are provided by the RHBA-2024:1452 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.5 --pullspecs

1.9.31.1. Bug fixes

Previously, the OpenShift Installer could fail to retrieve instance type information from Microsoft Azure in the allotted time, even when the type existed when verified with the Azure CLI. With this release, the timeout duration has increased to wait for an Azure response, and the error message includes the correct reason for the failure. (OCPBUGS-29964)
Previously, when creating clusters through OpenShift Cluster Manager (OCM) using the Hive provisioner, which uses OpenShift Installer, the installer failed to delete AWS IAM instance profiles after deleting the cluster. This issue led to an accumulation of instance profiles. With this release, the installer tags the instance profiles and deletes the appropriately tagged profiles. (OCPBUGS-18986)

1.9.31.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.32. RHSA-2024:1255 - OpenShift Container Platform 4.15.3 bug fix and security update

Issued: 19 March 2024

OpenShift Container Platform release 4.15.3, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:1255 advisory. The RPM packages that are included in the update are provided by the RHBA-2024:1258 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.3 --pullspecs

1.9.32.1. Bug fixes

Previously, if the root credentials were removed from a Google Cloud Platform (GCP) cluster that was in mint mode, the Cloud Credential Operator (CCO) would go into a degraded state after approximately 1 hour. This issue means that CCO could not manage the credentials root secret for a component. With this update, mint mode supports custom roles, so that removing root credentials from a GCP cluster does not cause the CCO to go into a degraded state. (OCPBUGS-30412)

1.9.32.2. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

1.9.33. RHSA-2024:1210 - OpenShift Container Platform 4.15.2 bug fix and security update

Issued: 13 March 2024

OpenShift Container Platform release 4.15.2, which includes security updates, is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:1210 advisory. The RPM packages that are included in the update are provided by the RHBA-2024:1213 advisory.

Space precluded documenting all of the container images for this release in the advisory.

You can view the container images in this release by running the following command:

$ oc adm release info 4.15.2 --pullspecs

1.9.33.1. Known issues

Providing a performance profile as an extra manifest at Day 0 did not work in OpenShift Container Platform 4.15.0, but it is now possible in 4.15.2 with the following limitation:
The installation of OpenShift Container Platform might fail when a performance profile is present in the extra manifests folder and targets the primary or worker pools. This is caused by the internal installation ordering that processes the performance profile before the default primary and worker MachineConfigPools are created. It is possible to workaround this issue by including a copy of the stock primary or worker MachineConfigPools in the extra manifests folder. (OCPBUGS-27948, OCPBUGS-29752)

1.9.33.2. Bug fixes

Previously, when updating to OpenShift Container Platform 4.15, CatalogSource objects never refreshed, which caused the optional Operator catalogs to fail to update. With this release, the image pull policy is changed to Always, which enables the optional Operator catalogs to update correctly. (OCPBUGS-30193)
Previously, the nodeStatusReportFrequency setting was linked to the nodeStatusUpdateFrequency setting. With this release, the nodeStatusReportFrequency setting is set to 5 minutes. (OCPBUGS-29797)
Previously, under certain conditions, the installer would fail with the error message unexpected end of JSON input. With this release, the error message is clarified and suggests users set the serviceAccount field in the install-config.yaml file to fix the issue. (OCPBUGS-29495)
Previously, the oauthMetadata property provided in the HostedCluster object was not honored. With this release, the oauthMetadata property is honored by the HostedCluster object. (OCPBUGS-29025)

1.9.33.3. Updating

To update an OpenShift Container Platform 4.15 cluster to this latest release, see Updating a cluster by using the CLI.

Chapter 1. OpenShift Container Platform 4.15 release notes

1.1. About this release

1.2. OpenShift Container Platform layered and dependent component support and compatibility

1.3. New features and enhancements

1.3.1. Red Hat Enterprise Linux CoreOS (RHCOS)

1.3.1.1. RHCOS now uses RHEL 9.2

1.3.1.2. Support for iSCSI devices (Technology Preview)

1.3.2. Installation and update

1.3.2.1. Encrypting Azure storage account during installation

1.3.2.2. RHOSP integration into the Cluster CAPI Operator (Tech Preview)

1.3.2.3. IBM Cloud and user-managed encryption

1.3.2.4. Installing a cluster on IBM Cloud with limited internet access

1.3.2.5. Installing a cluster on AWS to extend nodes to Wavelength Zones

1.3.2.6. Customizing the cluster network MTU on AWS deployments

1.3.2.7. Installing a cluster on AWS with compute nodes on AWS Outposts

1.3.2.8. Nutanix and fault tolerant deployments

1.3.2.9. OpenShift Container Platform on 64-bit ARM

1.3.2.10. Optional OLM cluster capability

1.3.2.11. Deploying Red Hat OpenStack Platform (RHOSP) with root volume and etcd on local disk (Technology Preview)

1.3.2.12. Configure vSphere integration with the Agent-based Installer

1.3.2.13. Additional bare metal configurations during Agent-based installation

1.3.2.14. Use the Dell iDRAC BMC to configure a RAID during installer-provisioned installation

1.3.3. Postinstallation configuration

1.3.3.1. OpenShift Container Platform clusters with multi-architecture compute machines

1.3.4. Web console

1.3.4.1. Administrator perspective

1.3.4.1.1. Node uptime information

1.3.4.1.2. Dynamic plugin enhancements

1.3.4.1.3. OperatorHub support for Microsoft Entra Workload ID

1.3.4.2. Developer Perspective

1.3.4.2.1. Software Supply Chain Enhancements

1.3.4.2.2. Red Hat Developer Hub in the web console

1.3.4.2.3. builds for OpenShift Container Platform is supported in the web console

1.3.5. IBM Z and IBM LinuxONE

1.3.5.1. IBM Z and IBM LinuxONE notable enhancements

1.3.5.2. Installing a cluster in an LPAR on IBM Z and IBM LinuxONE

1.3.6. IBM Power

1.3.6.1. IBM Power notable enhancements

1.3.7. IBM Power, IBM Z, and IBM LinuxONE support matrix

1.3.8. Authentication and authorization

1.3.8.1. OLM-based Operator support for Microsoft Entra Workload ID

1.3.9. Networking

1.3.9.1. OVN-Kubernetes network plugin support for IPsec encryption of external traffic general availability (GA)

1.3.9.2. IPv6 unsolicited neighbor advertisements now default on macvlan CNI plugin

1.3.9.3. Configuring the Whereabouts IP reconciler schedule

1.3.9.4. Status management updates for EgressFirewall and AdminPolicyBasedExternalRoute CR

1.3.9.5. Additional BGP metrics for MetalLB

1.3.9.6. Supporting all-multicast mode

1.3.9.7. Multi-network policy support for IPv6 networks

1.3.9.8. Ingress Operator metrics dashboard available

1.3.9.9. CoreDNS filtration of ExternalName service queries for subdomains

1.3.9.10. CoreDNS metrics deprecation and removal

1.3.9.11. Supported hardware for SR-IOV (Single Root I/O Virtualization)

1.3.9.12. Host network configuration policy for SR-IOV network VFs (Technology Preview)

1.3.9.13. Parallel node draining during SR-IOV network policy updates

1.3.10. Registry

1.3.10.1. Support for private storage endpoint on Azure

1.3.11. Storage

1.3.11.1. Recovering volume groups from the previous LVM Storage installation

1.3.11.2. Support for wiping the devices in LVM Storage

1.3.11.3. Support for deploying LVM Storage on multi-node clusters

1.3.11.4. Integrating RAID arrays with LVM Storage

1.3.11.5. FIPS compliance support for LVM Storage

1.3.11.6. Retroactive default StorageClass assignment is generally available

1.3.11.7. Local Storage Operator option to facilitate removing existing data on local volumes is generally available

1.3.11.8. Detach CSI volumes after non-graceful node shutdown is generally available

1.3.11.9. Shared VPC is supported for the GCP Filestore CSI Driver Operator as generally available

1.3.11.10. User-Managed encryption supports IBM VPC Block storage as generally available

1.3.11.11. SELinux relabeling using mount options (Technology Preview)

1.3.12. Oracle® Cloud Infrastructure

1.3.12.1. Using the Assisted Installer to install a cluster on OCI

1.3.12.2. Using the Agent-based Installer to install a cluster on OCI

1.3.13. Operator lifecycle

1.3.13.1. Operator Lifecycle Manager (OLM) 1.0 (Technical Preview)

1.3.13.2. Deprecation schema for Operator catalogs

1.3.14. Operator development

1.3.14.1. Token authentication for Operators on cloud providers: Microsoft Entra Workload ID

1.3.15. Builds

1.3.16. Machine Config Operator

1.3.16.1. Improved MCO state reporting by node (Technology Preview)