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4.18 Release notes for multi-arch features #88745

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Feb 20, 2025
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4.18 Release notes for multi-arch features #88745

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25 changes: 25 additions & 0 deletions release_notes/ocp-4-18-release-notes.adoc
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Expand Up @@ -593,6 +593,26 @@ With this release, the Agent-based Installer supports creating assets that can b

For more information, see xref:../installing/installing_with_agent_based_installer/installing-using-iscsi.adoc#installing-using-iscsi[Preparing installation assets for iSCSI booting].

[id="ocp-4.18-postinstallation-configuration_{context}"]
=== Postinstallation configuration
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@sr1kar99 This is adding a new postinstall section (out of alphabetical order), and there is already a postinstall section below. You should move your stuff down below


[id="ocp-4.18-migrate-x86-cp-to-arm-arch_{context}"]
==== Migrating the x86 control plane to arm64 architecture on {aws-full}

With this release, you can migrate the control plane in your cluster from `x86` to `arm64` architecture on {aws-first}. For more information, see xref:../updating/updating_a_cluster/migrating-to-multi-payload.adoc#migrating-from-x86-to-arm64-cp_updating-clusters-overview[Migrating the x86 control plane to arm64 architecture on Amazon Web Services].

[id="ocp-4.18-support-for-config-image-stream-import-beh_{context}"]
==== Configuring the image stream import mode behavior (Technology Preview)

This feature introduces a new field, `imageStreamImportMode`, in the `image.config.openshift.io/cluster` resource. The `imageStreamImportMode` field controls the import mode behavior of image streams. You can set the `imageStreamImportMode` field to either of the following values:

* `Legacy`
* `PreserveOriginal`

For more information, see xref:../openshift_images/image-configuration.adoc#images-configuration-parameters_image-configuration[Image controller configuration parameters].

You must enable the `TechPreviewNoUpgrade` feature set in the `FeatureGate` custom resource (CR) to enable the `imageStreamImportMode` feature. For more information, see xref:../nodes/clusters/nodes-cluster-enabling-features.adoc#nodes-cluster-enabling-features-about_nodes-cluster-enabling[Understanding feature gates].

[id="ocp-release-notes-olm_{context}"]
=== Operator lifecycle

Expand Down Expand Up @@ -1730,6 +1750,11 @@ In the following tables, features are marked with the following statuses:
|General Availability
|General Availability

|Support for configuring the image stream import mode behavior
|Not Available
|Not Available
|Technology Preview

|====

[discrete]
Expand Down