Kubernetes: Running jobs with command line arguments

Using kubectl to run a Kubernetes job with command line arguments.

1 – Create a secret with the command line arguments:

kubectl create secret generic job-args --from-literal=version="17.43.12"

The above command creates a temporary secret called job-args with and argument called version.

2 – The following yml represents a kubernetes job (job.yml) that can be used with the given arguments:

apiVersion: batch/v1
kind: Job
metadata:
  name: job-with-args
spec:
  template:
    spec:
      containers:
        - name: job-container
          image: alpine:latest
          imagePullPolicy: IfNotPresent
          env:
            - name: VERSION
              valueFrom:
                secretKeyRef:
                  name: job-args
                  key: version

          command:
            - /bin/sh
            - -c
          args:
            - |-
              my-command-that-needs-args "$(VERSION)"

3 – The next step is to run the job:

kubectl create -f job.yml

4 – If you need to observe logs, the following command might be useful:

kubectl logs job/job-with-args --follow --pod-running-timeout=20s