centos7 安装docker

1.安装yum-utils包

 yum install -y yum-utils

2.设置镜像仓库

yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

3.更新yum软件包索引

yum makecache fast

4.安装docker社区版docker-ce

yum install -y docker-ce-3:26.1.4-1.el7.x86_64

5.启动并设置开机启动

systemctl start docker && systemctl enable docker

6.设置镜像加速

mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{
   "registry-mirrors": ["https://z9399r8r.mirror.aliyuncs.com"]
   }
EOF

7.重新加载与重启

systemctl daemon-reload
systemctl restart docker

8.查看版本

docker version