Kubernetes 使用圖像拉取秘密創建 StatefulSet？

Question

對於 Kubernetes 部署，我們可以指定 imagePullSecrets 以允許它從我們的私有注冊表中提取 Docker 圖像。 但據我所知，StatefulSet 不支持這個？

如何為我的 StatefulSet 提供 pullsecret？

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: redis
  namespace: {{ .Values.namespace }}
  labels:
    app: redis
spec:
  replicas: 1
  selector:
    matchLabels:
      app: redis
  serviceName: redis-service
  updateStrategy:
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: redis
    spec:
      terminationGracePeriodSeconds: 10
      # imagePullSecrets not valid here for StatefulSet :-(
      containers:
        - image: {{ .Values.image }}

Answer 1

StatefulSet支持imagePullSecrets 。 您可以按如下方式進行檢查。

$ kubectl explain statefulset.spec.template.spec --api-version apps/v1
:
   imagePullSecrets <[]Object>
     ImagePullSecrets is an optional list of references to secrets in the same
     namespace to use for pulling any of the images used by this PodSpec. If
     specified, these secrets will be passed to individual puller
     implementations for them to use. For example, in the case of docker, only
     DockerConfig type secrets are honored. More info:
     https://kubernetes.io/docs/concepts/containers/images#specifying-imagepullsecrets-on-a-pod
:

例如，您可以嘗試以下示例StatefulSet是否可以先在您的集群中創建。

$ kubectl create -f - <<EOF
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
spec:
  serviceName: "nginx"
  replicas: 2
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      imagePullSecrets:
      - name: YOUR-PULL-SECRET-NAME
      containers:
      - name: nginx
        image: k8s.gcr.io/nginx-slim:0.8
        ports:
        - containerPort: 80
          name: web
EOF

$ kubectl get pod web-0 -o yaml | \
  grep -E '^[[:space:]]+imagePullSecrets:' -A1
  imagePullSecrets:
  - name: YOUR-PULL-SECRET-NAME