centos7安装docker
用yum安装docker
$ sudo yum install -y yum-utils \
device-mapper-persistent-data \
lvm2
$ sudo yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
$ sudo yum install docker-ce -y
$ docker -v
Docker version 18.09.7, build 2d0083d
$ sudo systemctl start docker # 启动docker
$ sudo docker run hello-world # 第一个实例
省略sudo
将docker加入当前用户组，可以省略每次执行docker指令时，加上sudo
$ sudo groupadd docker
$ sudo gpasswd -a ${USER} docker
$ sudo systemctl restart docker
重启shell
$ docker ps -a # 不再需要加sudo
更换源
$ sudo cat /etc/docker/daemon.json
{
"registry-mirrors": ["https://ispjh7e6.mirror.aliyuncs.com"]
}
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