gistfile1.txt

{# pre-pull images into each node with "pulling concurrency control" #}
{% set image = "your_repo/your_image:your_tag" %}
{% set docker_registry_credential = "your-cred" %}
{% set node_key = "type" %}
{% set node_value = "cpu" %}
{% set n_nodes = 1 %}
{# this concurrency number can be gradually changed afterwards, by using, e.g., k edit your_replicaset #}

kind: ReplicaSet
apiVersion: extensions/v1beta1
metadata:
  name: pre-pull-image
spec:
  replicas: {{ n_nodes }}
  template:
    metadata:
      labels:
        hasOnePodOnNode: yy
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: {{ node_key }}
                operator: In
                values:
                - {{ node_value }}
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                - key: hasOnePodOnNode
                  operator: In
                  values:
                  - yy
              topologyKey: "kubernetes.io/hostname"
{% if docker_registry_credential != "" %}
      imagePullSecrets:
      - name: {{ docker_registry_credential }}
{% endif %}
      containers:
      - name: tmp-pre-pull-image
        image: {{ image }}
        imagePullPolicy: IfNotPresent
        command:
        - "sleep"
        args:
        - "36000000"