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[enterprise-4.19] OSDOCS-10854: add updates to node image versioning scheme #98919

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[enterprise-4.19] OSDOCS-10854: add updates to node image versioning scheme #98919

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10 changes: 10 additions & 0 deletions release_notes/ocp-4-19-release-notes.adoc
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Expand Up @@ -1114,6 +1114,16 @@ The readiness probes for the API server have been modified to exclude etcd check

The OpenShift installation program now automatically detects and removes leftover persistent storage volumes on {vmw-full} when you delete a cluster. This prevents orphaned volumes from consuming disk space and creating unnecessary alerts in vCenter.

[id="ocp-4-19-rhcos-split-layers_{context}"]
=== {op-system-first} versioning uses {op-system-base-full} instead of {product-title}

Previously, the node image used a customized `/etc/os-release` containing key fields inherited from {op-system-base} that were changed to follow {product-title} release versioning information. With this release, the following {op-system} fields are kept the same as their {op-system-base} counterparts in order to emphasize that {op-system} builds on top of {op-system-base} Image Mode:
+
* `VERSION`
* `VERSION_ID`
* `OSTREE_VERSION`
* `ID`
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I think we want more context here.

OK, how about this (I'll you convert to/from the templated version and restructure to make it match the docs style better :)):

As part of convergence with Image Mode for RHEL, RHCOS is now a layered build on top of a shared RHEL base image. The most user-visible impact of this change is around versioning. For example, the VERSION_ID in /etc/os-release will now be RHEL-based (e.g. 9.6) rather than OpenShift-based (e.g. 4.19). Since this file is used for various purposes, the version change may also appear elsewhere, such as in the output of rpm-ostree status and in bootloader entries.

This change also means that OS-level features that land in the shared RHEL base image will usually be inherited by all OpenShift releases based on this base image.

?


[id="ocp-4-19-deprecated-removed-features_{context}"]
== Deprecated and removed features

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