Docker安装
1. 卸载旧版本
yum remove docker \docker-client \docker-client-latest \docker-common \docker-latest \docker-latest-logrotate \docker-logrotate \docker-engine \docker-selinux
2. 配置Docker的yum库
repo_file=/etc/yum.repos.d/CentOS-Base.repo
cp ${repo_file} ~/CentOS-Base.repo.backup
sudo sed -i s/#baseurl/baseurl/ ${repo_file}
sudo sed -i s/mirrorlist.centos.org/vault.centos.org/ ${repo_file}
sudo sed -i s/mirror.centos.org/vault.centos.org/ ${repo_file}
sudo yum clean all
安装yum工具
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
安装成功后，执行命令，配置Docker的yum源：
sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.reposudo sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo
更新yum，建立缓存
sudo yum makecache fast
3.安装Docker
yum install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
4. 启动和校验
# 启动Docker
systemctl start docker# 停止Docker
systemctl stop docker# 重启
systemctl restart docker# 设置开机自启
systemctl enable docker# 执行docker ps命令，如果不报错，说明安装启动成功
docker ps
5. 配置镜像加速器
镜像地址可能会变更，如果失效可以百度找最新的docker镜像。
配置镜像步骤如下：
# 创建目录
mkdir -p /etc/docker# 复制内容
tee /etc/docker/daemon.json <<-'EOF'
{"registry-mirrors": ["http://hub-mirror.c.163.com","https://mirrors.tuna.tsinghua.edu.cn","http://mirrors.sohu.com","https://ustc-edu-cn.mirror.aliyuncs.com","https://ccr.ccs.tencentyun.com","https://docker.m.daocloud.io","https://docker.awsl9527.cn"]
}
EOF# 重新加载配置
systemctl daemon-reload# 重启Docker
systemctl restart docker
