kubernetes使用 HostAliases 向 Pod /etc/hosts 文件添加指定host解析

作者: root007 分类: kubernetes 发布时间: 2019-10-23 11:56

当 DNS 配置以及其它选项不合理的时候,通过向 Pod 的 /etc/hosts 文件中添加条目,可以在 Pod 级别覆盖对主机名的解析。在 1.7 版本,用户可以通过 PodSpec 的 HostAliases 字段来添加这些自定义的条目。

建议通过使用 HostAliases 来进行修改,因为该文件由 Kubelet 管理,并且可以在 Pod 创建/重启过程中被重写。

通过 HostAliases 修改hosts文件指定解析主机名

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nodejs-v2
  labels:
    version: v2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nodejs
  template:
    metadata:
      labels:
        app: nodejs
        version: v2
    spec:
      hostAliases:
      - ip: "192.168.24.134"
        hostnames:
        - "datanode06.com"
      - ip: "192.168.24.93"
        hostnames:
        - "datanode01.com"
      - ip: "192.168.24.149"
        hostnames:
        - "datanode05.com"
      containers:
      - name: nodejs
        image: nodesjs
        ports:
        - containerPort: 8080

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