[root@jenkins-server ~]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
[root@jenkins-server ~]# yum -y install docker-ce
[root@jenkins-server ~]# systemctl start docker
[root@jenkins-server ~]# systemctl enable docker
[root@jenkins-server ~]# docker -v
Docker version 20.10.1, build 831ebea
# vim /usr/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
把上述行时行修改，修改如下：
ExecStart=/usr/bin/dockerd
# cat > /etc/docker/daemon.json <<EOF
{
"registry-mirrors": ["https://mirror.ccs.tencentyun.com"],
"insecure-registries": ["ccr.ccs.tencentyun.com"]，
}
EOF
[root@jenkins-server ~]# systemctl daemon-reload
[root@jenkins-server ~]# systemctl restart docker
