使用HostAliases 添加pod 的/etc/hosts

默认的pod 的/etc/hosts 无法自动数据

[root@master1 ~]# kubectl exec  smsservice-5c7ff5f74-bc969 -n testihospital cat /etc/hosts

# Kubernetes-managed hosts file.

127.0.0.1    localhost

::    localhost ip6-localhost ip6-loopback

fe00::    ip6-localnet

fe00::    ip6-mcastprefix

fe00::    ip6-allnodes

fe00::    ip6-allrouters

10.254.110.5    smsservice-5c7ff5f74-bc969

通过使用  k8s  HostAliases ,可以想 pod /etc/hosts 注入主机名对应关系

apiVersion: v1

kind: Pod

metadata:

  name: hostaliases-pod

spec:

  restartPolicy: Never

  hostAliases:

  - ip: "127.0.0.1"

    hostnames:

    - "foo.local"

    - "bar.local"

  - ip: "10.1.2.3"

    hostnames:

    - "foo.remote"

    - "bar.remote"

  containers:

  - name: cat-hosts

    image: busybox

    command:

    - cat

    args:

    - "/etc/hosts"