PR for review of RN for TELCODOCS 947

[rohennes]

TELCODOCS 947: You can create mixed-architectures clusters by the using the Assisted Installer API to add Aarch64 architecture hosts to deployed AMD64 clusters.

Version(s):
TBD - need peer review only

Issue:
https://issues.redhat.com/browse/TELCODOCS-947

Link to docs preview:
https://55537--docspreview.netlify.app/openshift-enterprise/latest/release_notes/ocp-4-12-release-notes.html#ocp-4-12-1-assisted-installer-api-mixed-arch-clusters

QE review:

• QE has approved this change.

Merging will be handled by different PR. Location in OCP docs may not be accurate, just need a peer review of RN content only.

[ocpdocs-previewbot]

🤖 Updated build preview is available at:
https://55537--docspreview.netlify.app

Build log: https://circleci.com/gh/ocpdocs-previewbot/openshift-docs/10036

[osherdp]

maybe the better term is available, as openshift not yet fully-supports it (for OCP 4.12)

Suggested change

	This feature is only supported by using the {ai-full} API.
	This feature is only available by using the {ai-full} API.

[osherdp]

in the spirit of the comment below about supports term

Suggested change

	{product-title} now supports mixed-architecture clusters, also known as heterogeneous clusters, that feature hosts with both AMD64 and AArch64 CPU architectures. Use the {ai-full} API to create a heterogeneous cluster by adding AArch64 worker nodes to a deployed AMD64 cluster.
	{product-title} now allows mixed-architecture clusters, also known as heterogeneous clusters, that feature hosts with both AMD64 and AArch64 CPU architectures. Use the {ai-full} API to create a heterogeneous cluster by adding AArch64 worker nodes to a deployed AMD64 cluster.

[rohennes]

Just reorganised the content to reflect your comment (we try to avoid the word allows)

[trewest]

I think the doc makes sense for the SaaS since release images are handled for customers, however in ZTP environments I think it is important to highlight that mixed-architecture clusters are only possible when using multi architecture release images for installation of the day 1 cluster.

[trewest]

Change release image to multi-architecture release image

[rohennes]

/label telco
/label peer-review-needed

[trewest]

/lgtm

[jeana-redhat]

This content looks good to me.

It seems to be a new feature added in a z-stream, and the z-stream is also already out as of 1/30. I would consider adding a "New features" heading for this if it is a new feature. I also suspect that this needs to go through the change management process - please confirm with your CS and DPM.

/remove-label peer-review-in-progress
/remove-label peer-review-needed
/label peer-review-done

[openshift-ci]

New changes are detected. LGTM label has been removed.

[rohennes]

Merge of this content completed in #56147