docker更新国内地址源

安装docker的yum源:
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

查看版本docker
yum list docker-ce.x86_64  --showduplicates |sort -r

yum makecache fast

yum install -y --setopt=obsoletes=0 \
  docker-ce-18.06.1.ce-3.el7

systemctl start docker
systemctl enable docker

系统要求 CentOS 7 以上
sudo cp -n /lib/systemd/system/docker.service /etc/systemd/system/docker.service
sudo sed -i "s|ExecStart=/usr/bin/docker daemon|ExecStart=/usr/bin/docker daemon --registry-mirror=https://1234abcd.mirror.aliyuncs.com|g" /etc/systemd/system/docker.service
sudo systemctl daemon-reload
sudo service docker restart

vi /etc/docker/daemon.json
{
  "registry-mirrors": ["your url"]
}