Docker安装

1、先接卸旧版本docker

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

2、

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

3、添加repo

sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

4、安装

sudo yum install docker-ce

5、启动

sudo systemctl start docker

6、验证

sudo docker run hello-world