Chapter 1. MicroShift 4.15 release notes


Red Hat build of MicroShift (MicroShift) provides developers and IT organizations with small-form-factor and edge computing delivered as an application that customers can deploy on top of their managed Red Hat Enterprise Linux (RHEL) devices at the edge. Built on OpenShift Container Platform and Kubernetes, MicroShift provides an efficient way to operate single-node clusters in low-resource edge environments.

MicroShift is designed to make control plane restarts economical and be lifecycle-managed as a single unit by the operating system. Updates, roll-backs, and configuration changes consist of simply staging another version in parallel and then - without relying on a network - flipping to and from that version and restarting.

1.1. About this release

Version 4.15 of MicroShift includes new features and enhancements. MicroShift was introduced as Generally Available with MicroShift 4.14. Update to the latest version of MicroShift to receive all of the latest features, bug fixes, and security updates. This release uses Kubernetes 1.28 with the CRI-O container runtime. New features, changes, and known issues that pertain to MicroShift are included in this topic.

You can deploy MicroShift clusters to either on-premise, cloud, or disconnected environments.

MicroShift 4.15 is supported on Red Hat Enterprise Linux for Edge (RHEL for Edge) and Red Hat Enterprise Linux (RHEL) 9.2 and 9.3.

For lifecycle information, see the MicroShift Life Cycle Policy.

1.2. New features and enhancements

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

1.2.1. Red Hat Enterprise Linux (RHEL)

  • MicroShift now runs on Red Hat Enterprise Linux (RHEL) versions 9.2 and 9.3. Compatibility with RHEL 9.3 is an enhancement for MicroShift version 4.15.
  • MicroShift uses crun and Control Group v2 (cgroup v2). If workloads rely on the cgroup file system layout, they might need to be updated to be compatible with cgroup v2.

    • If you run third-party monitoring and security agents that depend on the cgroup file system, update the agents to versions that support cgroup v2.
    • If you run cAdvisor as a standalone DaemonSet for monitoring pods and containers, update it to v0.43.0 or later.
    • If you deploy Java applications with JDK, ensure you are using JDK 11.0.16 and later or JDK 15 and later, which fully support cgroup v2.

1.2.2. Updating

Updates for both minor releases and patch releases are supported.

1.2.2.1. The following updates are supported

The following list provides update details:

  • MicroShift offers in-place updates on RHEL for Edge systems with automatic system rollback capabilities and automatic back up and restore functions.
  • Updates of the RPMs on a non-OSTree system such as RHEL are also supported.
  • Updates from the 4.14 version are supported.

1.2.2.2. Version logged at start up

Previously, MicroShift did not log its version at start up. The absence of version information made debugging certain scenarios difficult because the update path was unknown. Now, the MicroShift version is logged at start up and available with commands such as journalctl -u microshift | grep "Version". (OCPBUGS-19540)

1.2.3. Installation

1.2.3.1. Sample blueprints now included

The microshift-release-info RPM now contains sample blueprints that can be used for image building. The blueprints include both MicroShift RPM packages and container image references. See Adding the MicroShift service to a blueprint for more information.

1.2.4. Support

1.2.4.1. Getting the etcd version

Previously, you could not query for the etcd version included with MicroShift. Now, the microshift-etcd version command outputs the MicroShift version and the base version of the etcd database. See The etcd service for more information.

1.2.5. Networking

1.2.5.1. Networking documentation enhancements

Various networking documentation improvements are now available in the MicroShift release.

  • Network features with their customization status. A new detailed table of the networking features and their customizations that are accessible in a MicroShift instance are described in MicroShift networking customization matrix.
  • Network topology updates. Extensive examples of the Network topology available in your MicroShift instance are also updated, see Network topology.
  • Auditing exposed ports examples. The MicroShift documentation now includes procedures on auditing exposed network ports and viewing port log settings. The updated documentation can be viewed in Auditing exposed network ports.
  • Adding and closing ports. This release also improved the documentation for adding and closing ports and services in your MicroShift firewall, see Using optional port settings.
  • Network policies introduction. With this release, an introduction to setting network policies has been added to the MicroShift documentation. More details are expected to follow in z-stream releases. See Creating network policies

1.2.5.2. Configuring MicroShift on disconnected hosts

You can configure your network settings to run MicroShift on a fully disconnected host. This feature is also enabled in MicroShift version 4.14. For more information, see Configuring network settings for fully disconnected hosts.

1.2.6. Running Applications

1.2.6.1. Operator Lifecyle Manager

With this release, you can use Operator Lifecyle Manager (OLM) to create, apply, and administer add-on Operators. See Using Operator Lifecycle Manager with MicroShift

1.3. Deprecated and removed features

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

Deprecated functionality is still included in MicroShift 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 MicroShift 4.15, refer to the tables 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:

  • Available
  • Deprecated
  • Removed
Table 1.1. MicroShift deprecated and removed features tracker
Feature4.134.144.15

Network configuration flags

Deprecated

Removed

-

CIDR notation

-

Removed

-

1.4. Bug fixes

Installation

  • Previously, the microshift-release-info RPM depended on the microshift RPM. With this release, you can download and install the microshift-release-info RPM independently for use in image building. (OCPBUGS-22854)
  • Previously, the Greenboot health check script printed outputs for some checks that were not picked up by journald, resulting in missing log entries when running the journalctl -u greenboot-healthcheck command. With this release, the production of logs by the Greenboot healthcheck has been fixed so that all outputs are linked to the systemd unit, making them easily available to read. (OCPBUGS-20037)
  • Previously, the MicroShift clean-up script failed if CRI-O services were not present or not running. This prevented MicroShift and its dependencies from fully uninstalling. It also prevented the clean-up script from running on a system with a new installation of the microshift RPM that had not started. With this release, the MicroShift clean-up script skips the CRI-O steps if the service is not running, reports that status, and continues with clean-up activities. (OCPBUGS-22936)
  • Previously, the Greenboot health check reported a RED status when the Logical Volume Manager Storage (LVMS) component was disabled because no volume groups (VGs) were present. Because volume groups are not required for MicroShift, the health check should report GREEN without VGs. Now, when LVMS is disabled, the Greenboot health check skips the check for the openshift-storage namespace and reports GREEN status. (OCPBUGS-25689)

Networking

  • Whenever advertiseAddress is configured with an IP address, any network interfaces must also be configured. Previously, manually setting the advertiseAddress in the MicroShift config.yaml to the IP address value that is expected to be set by default, but not manually setting the same IP address for the br-ex network bridge on the host, caused the ovnkube-master container in the ovnkube-master pod to crash. With this release, the MicroShift service verifies whether advertiseAddress is set in the config.yaml and whether any interface has the same IP address set. If the two settings are not the same, MicroShift prints an error, for example, Advertise address: %s not present in any interface, advertiseAddress and fails. This helps ensure the proper configuration before the system starts. (OCPBUGS-27398)

Support

  • Previously, sos reports created journal logs in separate files, making it difficult to correlate MicroShift and the Greenboot health check. Now the MicroShift sos tool includes a full system journal with an aggregated view in the same log. With this update, you can see one log with a detailed report that shows all of the enabled plugins and data from the different components and applications. (OCPBUGS-19567)

1.5. Asynchronous errata updates

Security, bug fix, and enhancement updates for MicroShift 4.15 are released as asynchronous errata through the Red Hat Network. All MicroShift 4.15 errata are available on the Red Hat Customer Portal. For more information about asynchronous errata, read the MicroShift Life Cycle.

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

Note

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

This section is updated over time to provide notes on enhancements and bug fixes for future asynchronous errata releases of MicroShift 4.15. Versioned asynchronous releases, for example with the form MicroShift 4.15.z, will be detailed in the following subsections.

1.5.1. RHSA-2023:7200 - MicroShift 4.15.0 bug fix and security update advisory

Issued: 27 February 2024

MicroShift release 4.15.0 is now available. The list of bug fixes that are included in the update is documented in the RHSA-2023:7200 advisory. The images that are included in the update are provided by the RHSA-2023:7198 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.2. RHBA-2024:1212 - MicroShift 4.15.2 bug fix and enhancement update advisory

Issued: 13 March 2024

MicroShift release 4.15.2 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:1212 advisory. The images that are included in the update are provided by the RHSA-2024:1210 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

Bug fixes
FIPS mode
  • Previously, MicroShift used a version of the logical volume manager storage (LVMS) Container Storage Interface (CSI) provider that was not designed for FIPS compliance. This caused MicroShift to fail a FIPS validation test. With this release, the LVMS version 4.15.0 is used as the default CSI storage provider and validation passes.
  • When a Red Hat Enterprise Linux (RHEL) version that uses FIPS libraries is installed and started with FIPS enabled, MicroShift containers are automatically enabled to run in FIPS mode. See Running MicroShift containers in FIPS mode.
  • Update to the 4.15.2 release to apply this fix for FIPS mode.
Enhancements
Adds OLM image references in dedicated file
  • Previously, image references for embedding MicroShift OLM in a RHEL for Edge image were part of the microshift-olm RPM package. The application package had to be downloaded and run to retrieve the information. With this release, image references are now in the dedicated microshift-olm-release-info RPM package for easier use. (OCPBUGS-29246)

1.5.3. RHBA-2024:1257 - MicroShift 4.15.3 bug fix and enhancement update advisory

Issued: 20 March 2024

MicroShift release 4.15.3 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:1257 advisory. The images that are included in the update are provided by the RHSA-2024:1255 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.4. RHBA-2024:1451 - MicroShift 4.15.5 bug fix and enhancement update advisory

Issued: 27 March 2024

MicroShift release 4.15.5 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:1451 advisory. The images that are included in the update are provided by the RHSA-2024:1449 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

Enhancements
Change in openshift-marketplace namespace security

1.5.5. RHSA-2024:1561 - MicroShift 4.15.6 bug fix and security update advisory

Issued: 2 April 2024

MicroShift release 4.15.6 is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:1561 advisory. The images that are included in the update are provided by the RHSA-2024:1559 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.6. RHBA-2024:1670 - MicroShift 4.15.8 bug fix and security update advisory

Issued: 8 April 2024

MicroShift release 4.15.8 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:1670 advisory. The images that are included in the update are provided by the RHSA-2024:1668 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.7. RHBA-2024:1772 - MicroShift 4.15.9 bug fix and security update advisory

Issued: 16 April 2024

MicroShift release 4.15.9 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:1772 advisory. The images that are included in the update are provided by the RHSA-2024:1770 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.8. RHSA-2024:2667 - MicroShift 4.15.12 bug fix and security update advisory

Issued: 9 May 2024

MicroShift release 4.15.12 is now available. The list of bug fixes that are included in the update is documented in the RHSA-2024:2667 advisory. The images that are included in the update are provided by the RHSA-2024:2664 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.9. RHBA-2024:2775 - MicroShift 4.15.13 bug fix and security update advisory

Issued: 15 May 2024

MicroShift release 4.15.13 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:2775 advisory. The images that are included in the update are provided by the RHSA-2024:2773 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

Enhancements
GitOps with Argo CD documentation is now available

1.5.10. RHBA-2024:2868 - MicroShift 4.15.14 bug fix and security update advisory

Issued: 21 May 2024

The MicroShift release 4.15.14 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:2868 advisory. The images that are included in the update are provided by the RHSA-2024:2865 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.11. RHBA-2024:3330 - MicroShift 4.15.15 bug fix and security update advisory

Issued: 29 May 2024

The MicroShift release 4.15.15 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:3330 advisory. The images that are included in the update are provided by the RHSA-2024:3327 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.12. RHBA-2024:3490 - MicroShift 4.15.16 bug fix and update advisory

Issued: 5 June 2024

The MicroShift release 4.15.16 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:3490 advisory. The images that are included in the update are provided by the RHBA-2024:3488 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.13. RHBA-2024:3675 - MicroShift 4.15.17 bug fix and update advisory

Issued: 11 June 2024

The MicroShift release 4.15.17 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:3675 advisory. The images that are included in the update are provided by the RHBA-2024:3673 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.14. RHBA-2024:3891 - MicroShift 4.15.18 bug fix and security update advisory

Issued: 18 June 2024

The MicroShift release 4.15.18 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:3891 advisory. The images that are included in the update are provided by the RHSA-2024:3889 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.15. RHBA-2024:4043 - MicroShift 4.15.19 bug fix and security update advisory

Issued: 28 June 2024

The MicroShift release 4.15.19 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:4043 advisory. The images that are included in the update are provided by the RHSA-2024:4041 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.16. RHBA-2024:4153 - MicroShift 4.15.20 bug fix and security update advisory

Issued: 2 July 2024

The MicroShift release 4.15.20 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:4153 advisory. The images that are included in the update are provided by the RHSA-2024:4151 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.17. RHBA-2024:4323 - MicroShift 4.15.21 bug fix and enhancement advisory

Issued: 10 July 2024

The MicroShift release 4.15.21 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:4323 advisory. The images that are included in the update are provided by the RHSA-2024:4321 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.18. RHBA-2024:4476 - MicroShift 4.15.22 bug fix and enhancement advisory

Issued: 18 July 2024

The MicroShift release 4.15.22 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:4476 advisory. The images that are included in the update are provided by the RHSA-2024:4474 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.19. RHBA-2024:4701 - MicroShift 4.15.23 bug fix and enhancement advisory

Issued: 25 July 2024

The MicroShift release 4.15.23 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:4701 advisory. The images that are included in the update are provided by the RHSA-2024:4699 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.20. RHBA-2024:4852 - MicroShift 4.15.24 bug fix and enhancement advisory

Issued: 31 July 2024

The MicroShift release 4.15.24 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:4852 advisory. The images that are included in the update are provided by the RHSA-2024:4850 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.21. RHBA-2024:4957 - MicroShift 4.15.25 bug fix and enhancement advisory

Issued: 7 August 2024

The MicroShift release 4.15.25 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:4957 advisory. The images that are included in the update are provided by the RHSA-2024:4955 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.22. RHBA-2024:5162 - MicroShift 4.15.27 bug fix and enhancement advisory

Issued: 13 August 2024

The MicroShift release 4.15.27 is now available. The list of bug fixes that are included in the update is documented in the RHBA-2024:5162 advisory. The images that are included in the update are provided by the RHSA-2024:5160 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.23. RHBA-2024:5441 - MicroShift 4.15.28 bug fix and enhancement advisory

Issued: 22 August 2024

The MicroShift release 4.15.28 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:5441 advisory. The images that are included in the update are provided by the RHSA-2024:5439 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.24. RHBA-2024:5753 - MicroShift 4.15.29 bug fix and enhancement advisory

Issued: 28 August 2024

The MicroShift release 4.15.29 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:5753 advisory. The images that are included in the update are provided by the RHBA-2024:5751 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.25. RHBA-2024:6015 - MicroShift 4.15.30 bug fix and enhancement advisory

Issued: 5 September 2024

The MicroShift release 4.15.30 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:6015 advisory. The images that are included in the update are provided by the RHSA-2024:6013 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.26. RHBA-2024:6413 - MicroShift 4.15.31 bug fix and enhancement advisory

Issued: 11 September 2024

The MicroShift release 4.15.31 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:6413 advisory. The images that are included in the update are provided by the RHSA-2024:6409 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.27. RHBA-2024:6639 - MicroShift 4.15.32 bug fix and enhancement advisory

Issued: 18 September 2024

The MicroShift release 4.15.32 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:6639 advisory. The images that are included in the update are provided by the RHSA-2024:6637 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.28. RHBA-2024:6686 - MicroShift 4.15.33 bug fix and enhancement advisory

Issued: 19 September 2024

The MicroShift release 4.15.33 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:6686 advisory. The images that are included in the update are provided by the RHSA-2024:6685 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.29. RHBA-2024:6820 - MicroShift 4.15.34 bug fix and enhancement advisory

Issued: 25 September 2024

The MicroShift release 4.15.34 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:6820 advisory. The images that are included in the update are provided by the RHSA-2024:6818 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.30. RHBA-2024:7181 - MicroShift 4.15.35 bug fix and enhancement advisory

Issued: 2 October 2024

The MicroShift release 4.15.35 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:7181 advisory. The images that are included in the update are provided by the RHSA-2024:7179 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.31. RHBA-2024:7596 - MicroShift 4.15.36 bug fix and enhancement advisory

Issued: 9 October 2024

The MicroShift release 4.15.36 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:7596 advisory. The images that are included in the update are provided by the RHSA-2024:7594 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.32. RHBA-2024:8427 - MicroShift 4.15.37 bug fix and enhancement advisory

Issued: 31 October 2024

The MicroShift release 4.15.37 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:8427 advisory. The images that are included in the update are provided by the RHSA-2024:8425 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.33. RHBA-2024:8993 - MicroShift 4.15.38 bug fix and enhancement advisory

Issued: 13 November 2024

The MicroShift release 4.15.38 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:8993 advisory. The images that are included in the update are provided by the RHSA-2024:8991 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

1.5.34. RHBA-2024:10144 - MicroShift 4.15.39 bug fix advisory

Issued: 26 November 2024

The MicroShift release 4.15.39 is now available. The list of bug fixes that are included in the update is attached to the RHBA-2024:10144 advisory. The images that are included in the update are provided by the RHSA-2024:10142 advisory.

For the latest images included with MicroShift, view the contents of the microshift-release-info RPM. See Embedding MicroShift containers for offline deployments.

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