I am trying to delete temporary pods and other artifacts using helm delete. I am trying to run this helm delete to run on a schedule. Here is my stand alone command which works

helm delete --purge $(helm ls -a -q temppods.*)

However if i try to run this on a schedule as below i am running into issues.

Here is what mycron.yaml looks like:

apiVersion: batch/v1beta1
kind: CronJob
metadata:
  name: cronbox
  namespace: mynamespace
spec:
  serviceAccount: cron-z
  successfulJobsHistoryLimit: 1
  schedule: "*/5 * * * *"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: cronbox
            image: alpine/helm:2.9.1
            args: ["delete", "--purge", "$(helm ls -a -q temppods.*)"
            env:
            - name: TILLER_NAMESPACE
              value: mynamespace-build
            - name: KUBECONFIG
              value: /kube/config
            volumeMounts:
            - mountPath: /kube
              name: kubeconfig
          restartPolicy: OnFailure
          volumes:
          - name: kubeconfig
            configMap:
              name: cronjob-kubeconfig

I ran

oc create -f ./mycron.yaml

This created the cronjob

Every 5th minute a pod is getting created and the helm command that is part of the cron job runs.

I am expecting the artifacts/pods name beginning with temppods* to be deleted.

What i see in the logs of the pod is:

Error: invalid release name, must match regex ^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])+$ and the length must not longer than 53