Cache Images in K8S

cache_docker_images_in_cluster.yaml

apiVersion: apps/v1beta2
kind: DaemonSet
metadata:
  name: prepull-image
spec:
  
  selector:
    matchLabels:
      name: prepull-image
  template:
    metadata:
      labels:
        name: prepull-image
    spec:
      initContainers:
      - name: prepull
        image: eu.gcr.io/YOUR_IMAGE:latest
        command: ["/bin/sh"] 
        args: ["-c", "ls"]
      containers:
      - name: pause
        image: gcr.io/google_containers/pause

gitlab_prepull_image.yml

Cache Image:
  variables:
    DOCKER_DRIVER: overlay2
    DOCKER_HOST: tcp://localhost:2375
  image: dtzar/helm-kubectl:2.10.0
  stage: Cache Image
  before_script:
    - apk update && apk add curl docker sed
    - echo $KUBE_CONFIG | base64 -d  > ./kube_config
    - export KUBECONFIG=$PWD/kube_config
  script:
    - kubectl delete daemonset prepull-image -n YOUR_NAMESPACE
    - kubectl apply -f cache_docker_images_in_cluster.yaml -n YOUR_NAMESPACE