docker-安装

1、Uninstall old versions

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

2、set the repository

yum install -y yum-utils

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

3、install Docker Engine

yum install docker-ce docker-ce-cli containerd.io

4、修改docker仓库镜像为阿里镜像

mkdir -p /etc/docker
vi daemon.json
{
  "registry-mirrors": ["https://743r1rnd.mirror.aliyuncs.com"]
}

systemctl daemon-reload
systemctl restart docker

5、helloword

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