一、运行容器并进入容器
docker搭建hadoop集群环境之镜像建立与运行
二、修改/etc/hosts主机名
vim /etc/hosts
172.18.0.2 hadoop01 172.18.0.3 hadoop02 172.18.0.4 hadoop03 172.18.0.5 hadoop04 172.18.0.6 hadoop05
三、配置ssh免密登录(5个容器均进行此操作)
ssh-keygen #一路回车
ssh-copy-id hadoop01 ssh-copy-id hadoop02 ssh-copy-id hadoop03 ssh-copy-id hadoop04 ssh-copy-id hadoop05 #输入yes,密码为Dockerfile建立时的密码:root
密码参考：docker搭建hadoop集群环境之Dockerfile编写 第六行
测试SSH连接：
ssh hadoop01
ssh hadoop02
ssh hadoop03
ssh hadoop04
ssh hadoop05
