Kubernetes头盔-将运行头盔安装在运行的吊舱中

Question

I want to spin up a single installer pod with helm install that once running, will apply some logic and install other applications into my cluster using helm install .

I'm aware of the helm dependencies, but I want to run some business logic with the installations and I'd rather do it in the installer pod and on the host triggering the whole installation process.

I found suggestions on using the Kubernetes REST API when inside a pod, but helm requires kubectl installed and configured.

Any ideas?

Answer 1

It seems this was a lot easier than I thought...

On a simple pod running Debian, I just installed kubectl , and with the default service account's secret that's already mounted, the kubectl was already configured to the cluster's API.

Note that the configured default namespace is the one that my installer pod is deployed to.

Verified with

$ kubectl cluster-info
$ kubectl get ns

I then installed helm , which was already using the kubectl to access the cluster for installing tiller .

Verified with

$ helm version
$ helm init

I installed a test chart

$ helm install --name my-release stable/wordpress

It works!!

I hope this helps

Answer 2

You could add kubectl to your installer pod .

"In cluster" credentials could be provided via service account in "default-token" secret: https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/