pre-pull images on kubernetes

image-pull.yml

apiVersion: batch/v1
kind: Job
metadata:
  name: image-pull
spec:
  template:
    metadata:
      name: image-pull
    spec:
      volumes:
      - name: docker
        hostPath: /var/run/
      containers:
      - name: image-pull
        image: docker
        command: ["docker",  "pull","my-custom-image"]
        volumeMounts:
        - name: docker
          path: /var/run
      restartPolicy: Never