centos7 安装docker

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安装 Docker

[root@localhost~]# yum install docker

启动 docker 服务

[root@localhost~]# systemctl start docker.service

[root@localhost~]# systemctl enable docker.service

安装 centos 镜像

`[root@localhost~]# docker pull centos`

Using default tag: latestTrying to pull repository docker.io/library/centos ...latest: Pulling from docker.io/library/centos6bbedd9b76a4: Downloading 2.531 MB/49.87 MBfc19d60a83f1: Download completede413bb911fd: Download complete2879a7ad3144: Download complete668604fde02e: Download complete668604fde02e: Pulling fs layer*

检查 centos 镜像安装状态

`[root@localhost~]# docker images centos`

REPOSITORY          TAG                IMAGE ID            CREATED            SIZEdocker.io/centos    latest              980e0e4c79ec        7 weeks ago         196.7 MB

运行一个新的容器

`[root@localhost~]# docker run -i -t centos /bin/bash`

`[root@bd1a482d44f5 /]#`

参数解释-i, --interactive               Keep STDIN open even if not attached-t, --tty                            Allocate a pseudo-TTY

PS：“[root@bd1a482d44f5 /]#” 这行出现证明已进入容器

退出容器

`[root@localhost~]# exit`

exit

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