centos上安装使用docker

1.检查环境是否支持

uname -r

2.安全起见，建议先更新

yum update

3.添加docker源

sudo tee /etc/yum.repos.d/docker.repo <<EOF

[dockerrepo]

name=Docker Repository

baseurl=http://yum.dockerproject.org/repo/main/centos/7/

enabled=1

gpgcheck=1

gpgkey=http://yum.dockerproject.org/gpg

EOF

4.安装docker

yum install docker-engine

5.启动docker服务

service docker start

6.确认docker是否安装成功

docker run hello-world

7.配置加速器

sudo mkdir /usr/lib/systemd/system/bak

sudo cp -a /usr/lib/systemd/system/docker.service /usr/lib/systemd/system/bak

sudo sed -i '12c ExecStart=/usr/bin/dockerd --registry-mirror=https://xyz.mirror.aliyuncs.com' /usr/lib/systemd/system/docker.service

sudo systemctl daemon-reload

8.重启docker

sudo systemctl restart docker

9.验证加速器

sudo ps -ef | grep dockerd