Cent7安装docker

1. 卸载已经安装的Docker

yum -y remove docker \
                   docker-client \
                   docker-client-latest \
                   docker-common \
                   docker-latest \
                   docker-latest-logrotate \
                   docker-logrotate \
                   docker-selinux \
                   docker-engine-selinux \
                   docker-engine

rm -rf /etc/systemd/system/docker.service.d

rm -rf /var/lib/docker

rm -rf /var/run/docker

2. 添加阿里镜像

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

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

3. 查看可以安装的docker版本

yum list docker-ce --showduplicates

4. 安装18.03.1

sudo yum -y install docker-ce-18.03.1.ce

5. 启动 Docker，设置开机启动

systemctl enable docker
systemctl start docker

6. 设置Docker阿里云加速器

获取阿里云镜像加速器

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://x83mabsk.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker