Prepull Container Images in Kubernetes cluster via a Dameonset and Pause containers

prepuller-daemonset.yaml

kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: images-prepull
  namespace: foo
spec:
  selector:
    matchLabels:
      app: images-prepull
  template:
      labels:
        app: images-prepull
    spec:
      initContainers:
        - name: prepull-something
          image: 'quay.io/mcouliba/che-plugin-registry:2.2.0GA'
          command:
            - /bin/true
          resources:
            limits:
              memory: 128Mi
            requests:
              memory: 128Mi
          terminationMessagePath: /dev/termination-log
          terminationMessagePolicy: File
          imagePullPolicy: IfNotPresent
      containers:
        - name: pause
          image: gcr.io/google_containers/pause
          resources:
            limits:
              memory: 128Mi
            requests:
              memory: 128Mi
          terminationMessagePath: /dev/termination-log
          terminationMessagePolicy: File
          imagePullPolicy: Always
      restartPolicy: Always
      terminationGracePeriodSeconds: 30
      dnsPolicy: ClusterFirst
      securityContext: {}
      schedulerName: default-scheduler
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  revisionHistoryLimit: 10