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I'm setting up our CI (Jenkins pipeline) to deploy apps to a GKE cluster. Our Jenkins sever is running external to GKE or any Google Cloud infrastructure. I'm thinking of using a docker image with helm and kubectl to deploy, but need to set up credentials. On my local dev machine, I authenticate with:

gcloud container clusters get-credentials [CLUSTER_NAME]

What would be the best way of setting up credentials for a Jenkins job? Do I have to install and use the gcloud tools on Jenkins, or is there another approach?

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The easiest approach does appear to be to use gcloud, as trying to get a kubeconfig without it proved tricky.

Fortunately, gcloud, kubectl and helm are available as a single docker image kiwigrid/gcloud-kubectl-helm. For example:

docker run -it --rm --volume ./gcp-key-file.json:/data/gcp-key-file.json:ro kiwigrid/gcloud-kubectl-helm:2.11.0-224.0.0 bash
gcloud auth activate-service-account --key-file=/data/gcp-key-file.json
gcloud container clusters get-credentials dev-cluster --project <project name> --zone <zone>
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