GKE version Update release notes not having enough detail

[Muthukannan]

Recently, GKE cluster updated from 1.21.12-gke.1500 to 1.21.12-gke.1700. (Stable channel)

In order to check the impact, we try to check what exactly updated in new version.

But we could not able to  find the information in release notes, Security bulletins.
https://cloud.google.com/anthos/clusters/docs/security-bulletins
https://cloud.google.com/kubernetes-engine/docs/release-notes-stable

Is there any way to check the updated detail for patch releases?

[Yugandhar-gcp]

@Muthukannan I think you can refer below Link.

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG

[Muthukannan]

@Yugandhar-gcp 

Mentioned link only have detail regarding kubernetes  version updates.
But we need detail regarding GKE patch updates.
Other then kupernetes major updates, GKE releases some patch versions regularly .

[grobledo]

In the GKE release notes of May 26th you can see that the 1.21.12-gke.1700  version was released along with a few more, in that section you can find the changes for those new releases.

By the way, the 1.21.12-gke.1700 version is no longer stable as stated in the August 18th version update.

[Muthukannan]

@grobledo ,

By clicking version name lik (1.21.12-gke.1700)  ,  kubernetes  change log page displayed.
Which only contain kubernetes version changes.
if kubernetes patch version changed, we can check the changes in kubernetes  change log.
for example from 1.21.12-gke.1700 to 1.21.13-gke.900 .

But if GKE patch version changes, we could not able to check the changes. 
(1.21.12-gke.1500 - 1.21.12-gke.1700)