Insert Helm / Tiller environment variables along with Kubernetes variables

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Problem to solve

Configuring environment variables required to deploy using Helm in GitLab is a tedious task. Various environment variables need to be set.

An alternative is to run the following before every job. However, this is also annoying.

kubectl get secrets/tiller-secret -n gitlab-managed-apps -o "jsonpath={.data['tls\.crt']}" | base64 -d > ~/.helm/cert.pem
kubectl get secrets/tiller-secret -n gitlab-managed-apps -o "jsonpath={.data['tls\.key']}" | base64 -d > ~/.helm/key.pem

GitLab already knows which variables should be used, since it manages Tiller.

Intended users

• Developer
• Release Manager

Further details

GitLab already inserts Kubernetes related environment variables. https://docs.gitlab.com/ee/user/project/clusters/#deployment-variables

Proposal

If a Kubernetes environment is specified, GitLab might as well inject Helm related variables along with the other Kubernetes environment variables.

Permissions and Security

Documentation

Helm variables should be added to https://docs.gitlab.com/ee/user/project/clusters/#deployment-variables.

Testing

What does success look like, and how can we measure that?

Links / references