Chapter 3. Installing a cluster on RHV with customizations

apiVersion

The API version for the install-config.yaml content. The current version is v1. The installation program may also support older API versions.

String

baseDomain

The base domain of your cloud provider. The base domain is used to create routes to your OpenShift Container Platform cluster components. The full DNS name for your cluster is a combination of the baseDomain and metadata.name parameter values that uses the <metadata.name>.<baseDomain> format.

A fully-qualified domain or subdomain name, such as example.com.

metadata

Kubernetes resource ObjectMeta, from which only the name parameter is consumed.

Object

metadata.name

The name of the cluster. DNS records for the cluster are all subdomains of {{.metadata.name}}.{{.baseDomain}}.

String of lowercase letters, hyphens (-), and periods (.), such as dev.

platform

The configuration for the specific platform upon which to perform the installation: alibabacloud, aws, baremetal, azure, gcp, ibmcloud, nutanix, openstack, ovirt, powervs, vsphere, or {}. For additional information about platform.<platform> parameters, consult the table for your specific platform that follows.

Object

pullSecret

Get a pull secret from the Red Hat OpenShift Cluster Manager to authenticate downloading container images for OpenShift Container Platform components from services such as Quay.io.

{
   "auths":{
      "cloud.openshift.com":{
         "auth":"b3Blb=",
         "email":"you@example.com"
      },
      "quay.io":{
         "auth":"b3Blb=",
         "email":"you@example.com"
      }
   }
}

networking

The configuration for the cluster network.

Object

networking.networkType

The Red Hat OpenShift Networking network plugin to install.

Either OpenShiftSDN or OVNKubernetes. OpenShiftSDN is a CNI plugin for all-Linux networks. OVNKubernetes is a CNI plugin for Linux networks and hybrid networks that contain both Linux and Windows servers. The default value is OVNKubernetes.

networking.clusterNetwork

The IP address blocks for pods.

The default value is 10.128.0.0/14 with a host prefix of /23.

If you specify multiple IP address blocks, the blocks must not overlap.

An array of objects. For example:

networking:
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23

networking.clusterNetwork.cidr

Required if you use networking.clusterNetwork. An IP address block.

An IPv4 network.

An IP address block in Classless Inter-Domain Routing (CIDR) notation. The prefix length for an IPv4 block is between 0 and 32.

networking.clusterNetwork.hostPrefix

The subnet prefix length to assign to each individual node. For example, if hostPrefix is set to 23 then each node is assigned a /23 subnet out of the given cidr. A hostPrefix value of 23 provides 510 (2^(32 - 23) - 2) pod IP addresses.

A subnet prefix.

The default value is 23.

networking.serviceNetwork

The IP address block for services. The default value is 172.30.0.0/16.

The OpenShift SDN and OVN-Kubernetes network plugins support only a single IP address block for the service network.

An array with an IP address block in CIDR format. For example:

networking:
  serviceNetwork:
   - 172.30.0.0/16

networking.machineNetwork

The IP address blocks for machines.

If you specify multiple IP address blocks, the blocks must not overlap.

An array of objects. For example:

networking:
  machineNetwork:
  - cidr: 10.0.0.0/16

networking.machineNetwork.cidr

Required if you use networking.machineNetwork. An IP address block. The default value is 10.0.0.0/16 for all platforms other than libvirt and IBM Power Virtual Server. For libvirt, the default value is 192.168.126.0/24. For IBM Power Virtual Server, the default value is 192.168.0.0/24.

An IP network block in CIDR notation.

For example, 10.0.0.0/16.

additionalTrustBundle

A PEM-encoded X.509 certificate bundle that is added to the nodes' trusted certificate store. This trust bundle may also be used when a proxy has been configured.

String

capabilities

Controls the installation of optional core cluster components. You can reduce the footprint of your OpenShift Container Platform cluster by disabling optional components. For more information, see the "Cluster capabilities" page in Installing.

String array

capabilities.baselineCapabilitySet

Selects an initial set of optional capabilities to enable. Valid values are None, v4.11, v4.12 and vCurrent. The default value is vCurrent.

String

capabilities.additionalEnabledCapabilities

Extends the set of optional capabilities beyond what you specify in baselineCapabilitySet. You may specify multiple capabilities in this parameter.

String array

cpuPartitioningMode

Enables workload partitioning, which isolates OpenShift Container Platform services, cluster management workloads, and infrastructure pods to run on a reserved set of CPUs. Workload partitioning can only be enabled during installation and cannot be disabled after installation. While this field enables workload partitioning, it does not configure workloads to use specific CPUs. For more information, see the Workload partitioning page in the Scalability and Performance section.

None or AllNodes. None is the default value.

compute

The configuration for the machines that comprise the compute nodes.

Array of MachinePool objects. For details, see the "Additional RHV parameters for machine pools" table.

compute.architecture

Determines the instruction set architecture of the machines in the pool. Currently, clusters with varied architectures are not supported. All pools must specify the same architecture. Valid values are amd64 (the default).

String

compute: hyperthreading:

Whether to enable or disable simultaneous multithreading, or hyperthreading, on compute machines. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores.

Enabled or Disabled

compute.name

Required if you use compute. The name of the machine pool.

worker

compute.platform

Required if you use compute. Use this parameter to specify the cloud provider to host the worker machines. This parameter value must match the controlPlane.platform parameter value.

alibabacloud, aws, azure, gcp, ibmcloud, nutanix, openstack, ovirt, powervs, vsphere, or {}

compute.replicas

The number of compute machines, which are also known as worker machines, to provision.

A positive integer greater than or equal to 2. The default value is 3.

featureSet

Enables the cluster for a feature set. A feature set is a collection of OpenShift Container Platform features that are not enabled by default. For more information about enabling a feature set during installation, see "Enabling features using feature gates".

String. The name of the feature set to enable, such as TechPreviewNoUpgrade.

controlPlane

The configuration for the machines that comprise the control plane.

Array of MachinePool objects. For details, see the "Additional RHV parameters for machine pools" table.

controlPlane.architecture

Determines the instruction set architecture of the machines in the pool. Currently, clusters with varied architectures are not supported. All pools must specify the same architecture. Valid values are amd64 (the default).

String

controlPlane: hyperthreading:

Whether to enable or disable simultaneous multithreading, or hyperthreading, on control plane machines. By default, simultaneous multithreading is enabled to increase the performance of your machines' cores.

Enabled or Disabled

controlPlane.name

Required if you use controlPlane. The name of the machine pool.

master

controlPlane.platform

Required if you use controlPlane. Use this parameter to specify the cloud provider that hosts the control plane machines. This parameter value must match the compute.platform parameter value.

alibabacloud, aws, azure, gcp, ibmcloud, nutanix, openstack, ovirt, powervs, vsphere, or {}

controlPlane.replicas

The number of control plane machines to provision.

The only supported value is 3, which is the default value.

credentialsMode

The Cloud Credential Operator (CCO) mode. If no mode is specified, the CCO dynamically tries to determine the capabilities of the provided credentials, with a preference for mint mode on the platforms where multiple modes are supported.

Mint, Passthrough, Manual or an empty string ("").

imageContentSources

Sources and repositories for the release-image content.

Array of objects. Includes a source and, optionally, mirrors, as described in the following rows of this table.

imageContentSources.source

Required if you use imageContentSources. Specify the repository that users refer to, for example, in image pull specifications.

String

imageContentSources.mirrors

Specify one or more repositories that may also contain the same images.

Array of strings

publish

How to publish or expose the user-facing endpoints of your cluster, such as the Kubernetes API, OpenShift routes.

Internal or External. The default value is External.

Setting this field to Internal is not supported on non-cloud platforms.

sshKey

The SSH key to authenticate access to your cluster machines.

For example, sshKey: ssh-ed25519 AAAA...

platform.ovirt.ovirt_cluster_id

Required. The Cluster where the VMs will be created.

String. For example: 68833f9f-e89c-4891-b768-e2ba0815b76b

platform.ovirt.ovirt_storage_domain_id

Required. The Storage Domain ID where the VM disks will be created.

String. For example: ed7b0f4e-0e96-492a-8fff-279213ee1468

platform.ovirt.ovirt_network_name

Required. The network name where the VM nics will be created.

String. For example: ocpcluster

platform.ovirt.vnicProfileID

Required. The vNIC profile ID of the VM network interfaces. This can be inferred if the cluster network has a single profile.

String. For example: 3fa86930-0be5-4052-b667-b79f0a729692

platform.ovirt.api_vips

Required. An IP address on the machine network that will be assigned to the API virtual IP (VIP). You can access the OpenShift API at this endpoint. For dual-stack networks, assign up to two IP addresses. The primary IP address must be from the IPv4 network.

String. Example: 10.46.8.230

platform.ovirt.ingress_vips

Required. An IP address on the machine network that will be assigned to the Ingress virtual IP (VIP). For dual-stack networks, assign up to two IP addresses. The primary IP address must be from the IPv4 network.

String. Example: 10.46.8.232

platform.ovirt.affinityGroups

Optional. A list of affinity groups to create during the installation process.

List of objects.

platform.ovirt.affinityGroups.description

Required if you include platform.ovirt.affinityGroups. A description of the affinity group.

String. Example: AffinityGroup for spreading each compute machine to a different host

platform.ovirt.affinityGroups.enforcing

Required if you include platform.ovirt.affinityGroups. When set to true, RHV does not provision any machines if not enough hardware nodes are available. When set to false, RHV does provision machines even if not enough hardware nodes are available, resulting in multiple virtual machines being hosted on the same physical machine.

String. Example: true

platform.ovirt.affinityGroups.name

Required if you include platform.ovirt.affinityGroups. The name of the affinity group.

String. Example: compute

platform.ovirt.affinityGroups.priority

Required if you include platform.ovirt.affinityGroups. The priority given to an affinity group when platform.ovirt.affinityGroups.enforcing = false. RHV applies affinity groups in the order of priority, where a greater number takes precedence over a lesser one. If multiple affinity groups have the same priority, the order in which they are applied is not guaranteed.

Integer. Example: 3

<machine-pool>.platform.ovirt.cpu

Optional. Defines the CPU of the VM.

Object

<machine-pool>.platform.ovirt.cpu.cores

Required if you use <machine-pool>.platform.ovirt.cpu. The number of cores. Total virtual CPUs (vCPUs) is cores * sockets.

Integer

<machine-pool>.platform.ovirt.cpu.sockets

Required if you use <machine-pool>.platform.ovirt.cpu. The number of sockets per core. Total virtual CPUs (vCPUs) is cores * sockets.

Integer

<machine-pool>.platform.ovirt.memoryMB

Optional. Memory of the VM in MiB.

Integer

<machine-pool>.platform.ovirt.osDisk

Optional. Defines the first and bootable disk of the VM.

String

<machine-pool>.platform.ovirt.osDisk.sizeGB

Required if you use <machine-pool>.platform.ovirt.osDisk. Size of the disk in GiB.

Number

<machine-pool>.platform.ovirt.vmType

Optional. The VM workload type, such as high-performance, server, or desktop. By default, control plane nodes use high-performance, and worker nodes use server. For details, see Explanation of Settings in the New Virtual Machine and Edit Virtual Machine Windows and Configuring High Performance Virtual Machines, Templates, and Pools in the Virtual Machine Management Guide.

String

<machine-pool>.platform.ovirt.affinityGroupsNames

Optional. A list of affinity group names that should be applied to the virtual machines. The affinity groups must exist in RHV, or be created during installation as described in Additional RHV parameters for clusters in this topic. This entry can be empty.

<machine-pool>:
  platform:
    ovirt:
      affinityGroupNames:
        - compute
        - clusterWideNonEnforcing

This example defines no affinity groups:

<machine-pool>:
  platform:
    ovirt:
      affinityGroupNames: []

String

<machine-pool>.platform.ovirt.AutoPinningPolicy

Optional. AutoPinningPolicy defines the policy to automatically set the CPU and NUMA settings, including pinning to the host for the instance. When the field is omitted, the default is none. Supported values: none, resize_and_pin. For more information, see Setting NUMA Nodes in the Virtual Machine Management Guide.

String

<machine-pool>.platform.ovirt.hugepages

Optional. Hugepages is the size in KiB for defining hugepages in a VM. Supported values: 2048 or 1048576. For more information, see Configuring Huge Pages in the Virtual Machine Management Guide.

Integer