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openshift-enterprise

How to specify OpenShift image when creating a Job

Under OpenShift 3.3, I'm attempting to create a Job using the oc command line tool (which apparently lacks argument-based support for Job creation), but I'm having trouble understanding how to make use of an existing app's image stream. For example, when my app does an S2I build, it pushes to the app:latest image stream. I want the Job I'm attempting to create to be run in the context of a new job-specific pod using my app's image stream. I've prepared a test Job using this YAML:

---
apiVersion: batch/v1
kind: Job
metadata:
  name: myapp-test-job
spec:
  template:
    spec:
      restartPolicy: Never
      activeDeadlineSeconds: 30
      containers:
      - name: myapp
        image: myapp:latest
        command: ["echo", "hello world"]

When I create the above Job using oc create -f job.yaml, OpenShift fails to pull myapp:latest. If I change image: myapp:latest to image: 172.30.194.141:5000/myapp/myapp:latest (and in doing so, specify the host and port of my OpenShift instance's internal Docker registry), this works, but I'd rather not specify this as it seems like introducing a dependency on an OpenShift implementation detail. Is there a way to make OpenShift Jobs use images from an existing app without depending on such details?

The documentation shows image: perl, but it's unclear on how to use a Docker image built and stored within OpenShift.

Solution

  • I learned that you simply cannot yet use an ImageStream with a Job unless you specify the full address to the internal OpenShift Docker registry. Relevant GitHub issues: