#!/bin/bash
# Docker 安装 + 国内公网镜像加速配置脚本 (Ubuntu 24.04 / amd64)
# 注: mirrors.tencentyun.com / mirror.ccs.tencentyun.com 仅腾讯云 VPC 内网可用，
#     本机不在腾讯云内网，故 apt 源使用腾讯云公网镜像站，registry 加速使用公网加速源。
set -e

echo "==> [1/5] 安装基础依赖"
apt-get update -y
apt-get install -y ca-certificates curl gnupg

echo "==> [2/5] 添加 Docker 官方 GPG key 和仓库（腾讯云公网镜像）"
install -m 0755 -d /etc/apt/keyrings
rm -f /etc/apt/keyrings/docker.gpg
curl -fsSL https://mirrors.cloud.tencent.com/docker-ce/linux/ubuntu/gpg \
  | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
chmod a+r /etc/apt/keyrings/docker.gpg

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
  https://mirrors.cloud.tencent.com/docker-ce/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" \
  > /etc/apt/sources.list.d/docker.list

echo "==> [3/5] 安装 Docker 引擎"
apt-get update -y
apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

echo "==> [4/5] 配置镜像加速（公网加速源，多源容灾）"
mkdir -p /etc/docker
cat > /etc/docker/daemon.json <<'EOF'
{
  "registry-mirrors": [
    "https://docker.m.daocloud.io",
    "https://docker.1ms.run",
    "https://hub.rat.dev"
  ]
}
EOF

echo "==> [5/5] 启动并配置开机自启"
systemctl enable docker
systemctl restart docker

echo "==> 完成，验证："
docker --version
docker run --rm hello-world
docker info | grep -A5 "Registry Mirrors"