kubernetes HostAliases 添加其他主机别名到POD

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我是靠谱客的博主能干项链，最近开发中收集的这篇文章主要介绍kubernetes HostAliases 添加其他主机别名到POD，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

kubernetes可以通过.spec.hostAliases字段添加主机别名，这个功能是在1.7.x以及以上版本提供的

查看默认的hosts文件

创建pod

[root@demo ~]# kubectl run nginx --image xxx/hub/nginx:20180808 --generator=run-pod/v1
pod "nginx" created
[root@test-master-113 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx 0/1 ContainerCreating 0 3s
[root@test-master-113 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx 0/1 ContainerCreating 0 5s
[root@test-master-113 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx 0/1 ContainerCreating 0 6s
[root@test-master-113 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx 0/1 ContainerCreating 0 7s
[root@test-master-113 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx 1/1 Running 0 8s
[root@test-master-113 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx 1/1 Running 0 10s

查看pod的hosts的信息

[root@demo ~]# kubectl exec nginx -- cat /etc/hosts
# Kubernetes-managed hosts file.
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
。。。
192.168.116.183 nginx

添加其他host的信息

使用HostAliases添加其他host信息

添加ip 127.0.0.1 对应的主机名为foo.local和 bar.local

添加ip 10.1.2.3 对应的主机名为foo.remote和 bar.remote

如下

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: harbor.enncloud.cn/hub/nginx:20180808
command:
- cat
args:
- "/etc/hosts"

查看日志

[root@demo qinzhao]# kubectl logs hostaliases-pod
# Kubernetes-managed hosts file.
127.0.0.1 localhost
。。。。。。。
192.168.141.26 hostaliases-pod
127.0.0.1 foo.local
127.0.0.1 bar.local
10.1.2.3 foo.remote
10.1.2.3 bar.remote

原文：https://blog.csdn.net/qq_21816375/article/details/81534875