CentOS 7 中 Docker 的安装

Docker 软件包已经包括在默认的 CentOS-Extras 软件源(联网使用centos7u2自带网络Yum源)里。因此想要安装 docker，只需要运行下面的 yum 命令：

# yum install docker

启动 Docker 服务:
CentOS 6

# service docker start
# chkconfig docker on

CentOS 7

# systemctl start docker.service
# systemctl enable docker.service

确定docker服务在运行：

• 结果会显示服务端和客户端的版本，如果只显示客户端版本说明服务没有启动

[root@docker1 yum]# docker version
Client:
 Version:         1.10.3
 API version:     1.22
 Package version: docker-common-1.10.3-46.el7.centos.14.x86_64
 Go version:      go1.6.3
 Git commit:      cb079f6-unsupported
 Built:           Fri Sep 16 13:24:25 2016
 OS/Arch:         linux/amd64

Server:
 Version:         1.10.3
 API version:     1.22
 Package version: docker-common-1.10.3-46.el7.centos.14.x86_64
 Go version:      go1.6.3
 Git commit:      cb079f6-unsupported
 Built:           Fri Sep 16 13:24:25 2016
 OS/Arch:         linux/amd64

查看docker基本信息：

# docker info

校验Docker的安装

[root@master ~]# docker run -it ubuntu bash
Unable to find image 'ubuntu:latest' locally
Trying to pull repository daocloud.io/ubuntu ... 
latest: Pulling from daocloud.io/ubuntu
22ecafbbcc4a: Pull complete 
580435e0a086: Pull complete 
Digest: sha256:80c2902178d79f439b13c5a244f3b1ef67ca890dbbe58d19caa13301ca56a505

• 如果自动进入下面的容器环境，说明ubuntu镜像运行成功，Docker的安装也没有问题：可以操作容器了

root@50a0449d7729:/# pwd     
/
root@50a0449d7729:/# ls
bin  boot  dev  etc  home  lib  lib64  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var