Harbor认证：K8S无法正常拉取harbor镜像

当通过K8S从私有仓Harbor中拉取镜像时，报错：

Failed to pull image "harbor.paicidata.com/crawler/dataetl_sit:v0.0.3": rpc error: code = Unknown desc = Error response from daemon: pull access denied for harbor.paicidata.com/crawler/dataetl_sit, repository does not exist or may require 'docker login'

提示：docker未登录 或者 镜像不存在，直接通过docker pull命令去执行是可以的，看来是K8S认为docker未登录。

涉及到在deployment中添加imagePullSecrets：拉取镜像授权。
通过kubectl create secret创建一个secret然后引之~

kubectl create secret docker-registry regsecret --docker-server=harbor.paicidata.com --docker-username=admin --docker-password=xxxx --docker-email=xxxx

追加imagePullSecrets即可：

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: yuqing-dataetl-sit
  labels:
     name: yuqing-dataetl-sit-deploymnet
     env: sit
spec:
  replicas: 3
  minReadySeconds: 30
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        project: crawler-dataetl-sit
        env: sit
    spec:
      terminationGracePeriodSeconds: 60
      containers:
      - name: yuqing-dataetl-sit
        image: harbor.paicidata.com/crawler/dataetl_sit:v0.0.3
        resources:
          limits:
            memory: 1Gi
          requests:
            memory: 1Gi
      imagePullSecrets:
      - name: regsecret