Option to rename the generated kubectl context

[abonander]

TL;DR

We have local build-and-deploy shell scripts that I'm trying to incorporate into a Github Actions workflow, and these scripts use kubectl --context=<context name> so as to ensure the correct context is used even if the current-context is different.

However, the context name you get locally when you run gcloud container clusters get-credentials looks something like this:

gke_{project}_{region/zone}_{cluster}

Whereas this Action names the context the same as the cluster, which means having to rename the context before invoking our script:

kubectl config rename-context $GKE_CLUSTER <expected context name>
./script/deploy.sh

Design

I'd just like to be able to pass the name that should be used for the generated context:

      - uses: google-github-actions/get-gke-credentials@fb08709ba27618c31c09e014e1d8364b02e5042e
        with:
          cluster_name: ${{ env.GKE_CLUSTER }}
          location: ${{ env.GKE_ZONE }}
          credentials: ${{ secrets.GKE_SA_KEY }}
          context_name: <expected context name>

[bharathkkb]

Thanks for the FR @abonander
This is good idea, I think we could even default to gke_{project}_{location}_{cluster} to align with gcloud.

[abonander]

I was going to suggest that, though I was concerned about possibly breaking existing workflows.

[bharathkkb]

Currently we use a random name and set KUBECONFIG, so I think we should be okay.

[abonander]

Really? Cause it looks like it uses the cluster name: https://github.com/google-github-actions/get-gke-credentials/blob/main/src/gkeClient.ts#L187

[bharathkkb]

@abonander ah yes, you are right. I was thinking about the filename. I think we can add the context_name first and evaluate defaulting later.

Considering this is pre 1.0, we could have an upgrade guide showing how to get that behavior. /cc @averikitsch any thoughts?

with:
  cluster_name: ${{ env.GKE_CLUSTER }}
  location: ${{ env.GKE_ZONE }}
  credentials: ${{ secrets.GKE_SA_KEY }}
+  context_name: ${{ env.GKE_CLUSTER }}