[Backport 2.6.x] - ensure all EKS versions are in 2.6.x branches

[gaktive]

We had a fix for updating the EKS versions to include k8s 1.23 & 1.24 for 2.6.x but they only made it into master, not the 2.6 branches so we still only show <1.22 for 2.6.9 and 2.6-latest.

1.23: rancher/ui#4890
1.24: rancher/ui#4908
Remove older versions: rancher/ui#4899

[gaktive]

We should figure out if anything else happened during branching for the 2.6.9 release since there may be other missing PRs in the release from master to 2.6-xxxx

[catherineluse]

After comparing commits in master and the release-2.6.9 branch in the Ember repo, I believe the only other change that needs to be backported is #6774.

[gaktive]

Based on discussion with @snasovich, we may have to revert rancher/ui#4899 since this ties into a complex web of supporting older k8s versions that 2.6.x has to but 2.7.x doesn't.

@nwmac should we Reopen this before QA starts testing?

[sowmyav27]

Reopening for QA validations

[sowmyav27]

@gaktive Can you confirm if this is ready for QA validations? Also is there a forwardport ticket to this for 2.7.2?

[gaktive]

@richa was rancher/ui#4899 reverted? I can't tell from the history in that PR or here what happened.

@sowmyav27 for 2.7.x, this ticket isn't relevant since that work was already done:

• add 1.24: Support K8s 1.24 EKS  #7219
• add 1.23: Add EKS 1.23 #6826
• remove 1.22 and older: [2.7.0] hide k8s 1.22 and below for EKS/GKE/AKS in Rancher UI #7203

This ticket was created because it was discovered that prior backports never made it into 2.6.9 due to some branching confusion.

[gaktive]

Another internal reference: SURE-5880
Bumped Priority to 0.

[gaktive]

This should be ready for QA as far as I understand.

[gaktive]

@snasovich as I look for your past comments, what did 2.6.x and 2.7.x have to support with EKS k8s versions? You said somewhere that we had to support older versions in 2.6.x for a while and we've gone to 1.20-1.24 in this work to fix things.

[thaneunsoo]

Test Environment:

Rancher version: v2.6-head 6d1bd94
Rancher cluster type: HA
Docker version: 20.10

Downstream cluster type: eks

---

Testing:

2.6-head is showing all the EKS versions available for users

[snasovich]

@gaktive , as for your last comment, replied offline (in Slack).