Docker配置阿里云加速地址

　　首先需要注册一个阿里云账号，只要注册账号就可以，不用充钱购买任何阿里云服务！

　　打开阿里云网站https://cr.console.aliyun.com，登陆自己的阿里云账号。

　　然后只需要在服务器配置docker配置文件，只需要修改"ExecStart=/usr/bin/dockerd‐current ‐‐registrymirror=https://rrr9h8xt.mirror.aliyuncs.com"即可。然后重启docker 服务即可。

[root@docker~]# vim /usr/lib/systemd/system/docker.service 
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd‐current ‐‐registrymirror=https://rrr9h8xt.mirror.aliyuncs.com
ExecReload=/bin/kill -s HUP $MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target