一、docker安装

• 官方文档链接

1. 安装前源准备

yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

1. 安装docker

dnf -y install docker-ce

1. 使用阿里云做镜像加速

• 参考链接

  mkdir -p /etc/docker
  tee /etc/docker/daemon.json <<-'EOF'
  {
  "registry-mirrors": ["https://7f8vpsqx.mirror.aliyuncs.com"]
  }
  EOF
  systemctl daemon-reload
  systemctl enable docker
  systemctl restart docker

1. docker命令补全

   sudo yum install -y bash-completion
   source /usr/share/bash-completion/bash_completion
   source /usr/share/bash-completion/completions/docker

   二、常见异常处理

2. Cenntos8安装过程报错

• 安装最新版containerd.io-1.2.6-3.3.el7.x86_64.rpm
• 参考链接：https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/edge/Packages/

dnf install -y https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/edge/Packages/containerd.io-1.3.7-3.1.el7.x86_64.rpm

• 再装剩下两个

dnf install docker-ce docker-ce-cli
systemctl start docker
docker --version

三、docker卸载

1. 卸载软件包

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

1. 删除服务注册文件

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

1. 删除docker库

rm -rf /var/lib/docker

1. 删除运行文件

rm -rf /var/run/docker

四、使用官方源安装docker

yum install -y yum-utils
yum-config-manager —add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install -y docker-ce docker-ce-cli containerd.io
systemctl enable docker
systemctl start docker