Qfyilyi

How to deploy and run a container in Kubernetes, that should do his job and terminate?

I thought this is what Run-Once is for, but it looks like it's not supported to work.

I have some jobs, packed in docker images, that should be run either once/on demand (data import), where the config change should trigger re-run, or periodically (like volume backup). My idea was to deploy a container with restartPolicy: never which would stop and scale up to null after accomplishing.

What alternatives do I have for this missing functionality?

If you waht a task to be executed just once, or just when you want, you should define a job.
From the oficial documentation you can see this example:

apiVersion: batch/v1

kind: Job

metadata:

  name: pi

spec:

  template:

    spec:

      containers:

      - name: pi

        image: perl

        command: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]

      restartPolicy: Never

  backoffLimit: 4

If you want to execute a task periodically, you should define a job and also a cronjob, defining the frequence you want the job to be executed. The following example is also from the oficial documentation:

apiVersion: batch/v1beta1

kind: CronJob

metadata:

  name: hello

spec:

  schedule: "*/1 * * * *"

  jobTemplate:

    spec:

      template:

        spec:

          containers:

          - name: hello

            image: busybox

            args:

            - /bin/sh

            - -c

            - date; echo Hello from the Kubernetes cluster

          restartPolicy: OnFailure

You can use a job/cronjob. This example is from kubernetes docs:

apiVersion: batch/v1

kind: Job

metadata:

  name: pi

spec:

  backoffLimit: 5

  activeDeadlineSeconds: 100

  template:

    spec:

      containers:

      - name: pi

        image: perl

        command: ["perl",  "-Mbignum=bpi", "-wle", "print bpi(2000)"]

      restartPolicy: Never

So, it will calculate "pi" and will terminate