apt安装docker步骤

下面是 Docker 官方 apt 流程（Ubuntu），装好之后：

• 配置文件：/etc/docker/daemon.json
• 启停：systemctl
• 不再有 snap 沙箱限制

① 先清残留（必跑）

# 如果还有旧 apt 版残留，删掉
sudo apt remove -y docker docker-engine docker.io containerd runc docker-compose

② 安装依赖、导入官方 GPG

sudo apt update
sudo apt install -y ca-certificates curl

sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL [https://download.docker.com/linux/ubuntu/gpg](https://download.docker.com/linux/ubuntu/gpg) -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

③ 添加 Docker 官方 apt 源

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] [https://download.docker.com/linux/ubuntu](https://download.docker.com/linux/ubuntu) \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

④ 安装（核心）

sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin

⑤ 验证

sudo systemctl status docker
sudo docker run hello-world

能跑出 hello-world，就是成功。

⑥ 免 sudo（解决你之前 permission denied）

sudo groupadd docker
sudo usermod -aG docker $USER
newgrp docker

稳妥做法：退出 SSH，重连，之后直接敲 docker，不用 sudo

⑦ 直接写入加速器（就是你要的）

sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": [
    "[https://docker.1ms.run](https://docker.1ms.run)",
    "[https://docker.daocloud.io](https://docker.daocloud.io)",
    "[https://docker.xuanyuan.me](https://docker.xuanyuan.me)"
  ],
  "dns": ["223.5.5.5", "114.114.114.114"],
  "ipv6": false
}
EOF

sudo systemctl daemon-reload
sudo systemctl restart docker

再验证源是否加载：

docker info | grep -A 10 "Registry Mirrors"

⑧ 拉取并启动 Uptime Kuma

docker pull louislam/uptime-kuma:1
docker run -d --restart=always -p 3001:3001 -v uptime-kuma:/app/data --name uptime-kuma louislam/uptime-kuma:1

如果官方源拉取很慢

把上面「添加源」那一步换成国内镜像版，例如中科大源：

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] [https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu](https://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu) \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null