k8s修改pod的hosts文件

1、在1.7版本后使用HostAliases修改pod的hosts文件。该文件由kubelet管理

在deployment的yaml文件中添加在pod template 的spec里面即可：

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
     app: runner
  name: gitlab-runner-gitlab-runner
spec:
  replicas:
  selector:
    matchLabels:
      app: runner
  strategy:
    rollingUpdate:
      maxSurge:
      maxUnavailable:
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: runner
    spec:
      dnsPolicy: None
      dnsConfig:
        nameservers:
          - 10.3.9.13
          - 10.3.9.11
        searches:
          - gitlab.klog.com
          - reg.klog.com
        options:
          - name: ndots
            value: ""
          - name: edns0
      hostAliases:
      - hostnames:
        - gitlab.klog.com
        ip: 10.3.2.13
      - hostnames:
        - reg.klog.com
        ip: 10.3.2.11
      imagePullSecrets:
      - name: registry-secrete

nameservers：是自己的内网dns

禁止访问外网，走hostaliases。