一、安装 yum 工具

sudo yum install -y yum-utils

二、添加 Docker 仓库

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

三、安装 Docker

sudo yum install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

四、配置镜像加速器

方式一、

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": [
    "https://docker.1ms.run",
    "https://docker.mirrors.ustc.edu.cn",
    "https://hub-mirror.c.163.com"
  ]
}
EOF

方式二、

# 一键配置，简单快捷，告别拉取超时
sudo bash -c "$(curl -sSL https://n3.ink/helper)"

五、启动 Docker

sudo systemctl start docker
sudo systemctl enable docker

六、完全卸载脚本

#!/bin/bash
# complete_docker_uninstall.sh

echo "=== 开始完全卸载 Docker ==="

echo "1. 停止 Docker 服务..."
sudo systemctl stop docker docker.socket containerd 2>/dev/null
sudo systemctl disable docker docker.socket containerd 2>/dev/null

echo "2. 卸载 Docker 包..."
sudo yum remove -y \
    docker-ce \
    docker-ce-cli \
    containerd.io \
    docker-buildx-plugin \
    docker-compose-plugin \
    docker \
    docker-client \
    docker-client-latest \
    docker-common \
    docker-latest \
    docker-latest-logrotate \
    docker-logrotate \
    docker-engine \
    docker-ce-rootless-extras 2>/dev/null

echo "3. 删除 Docker 数据和配置..."
sudo rm -rf /var/lib/docker
sudo rm -rf /var/lib/containerd
sudo rm -rf /etc/docker
sudo rm -rf /etc/containerd
sudo rm -f /var/run/docker.sock
sudo rm -f /var/run/docker.pid

echo "4. 删除 systemd 配置..."
sudo rm -f /etc/systemd/system/docker.service
sudo rm -rf /etc/systemd/system/docker.service.d
sudo rm -f /usr/lib/systemd/system/docker.service

echo "5. 清理用户组..."
sudo groupdel docker 2>/dev/null || true

echo "6. 清理 yum 缓存..."
sudo yum clean all
sudo yum autoremove -y

echo "7. 验证卸载..."
if command -v docker &> /dev/null; then
    echo "⚠️  Docker 命令仍然存在"
    echo "尝试强制删除..."
    sudo rm -f $(which docker) 2>/dev/null || true
else
    echo "✅ Docker 命令已移除"
fi

if ps aux | grep -i docker | grep -v grep; then
    echo "⚠️  仍有 Docker 进程运行"
    sudo pkill -9 docker 2>/dev/null || true
    sudo pkill -9 containerd 2>/dev/null || true
else
    echo "✅ 无 Docker 进程运行"
fi

echo ""
echo "=== Docker 卸载完成 ==="
echo "请重启系统以确保完全清理：sudo reboot"