# Docker + Compose + Buildx 升级教程

流程：删除旧版 -> 安装新版 -> 验证

---

# 1. 删除旧版本

## 删除 apt 安装的旧包

```bash
sudo apt remove -y docker.io docker-compose docker-compose-v2 docker-doc podman-docker containerd runc
```

---

## 删除系统中的 `docker-compose`（V1）

```bash
sudo rm -f "$(which docker-compose 2>/dev/null)"
```

---

## 查找并删除手动安装的 Buildx 插件

```bash
docker info | sed -n '/Plugins:/,/^ Server:/p' | grep -A2 buildx
```

从输出中获取 `Path`，然后执行：

```bash
rm -f <Path中对应的docker-buildx文件>
```

---

## 清理无用依赖

```bash
sudo apt autoremove -y
```

---

# 2. 安装 Docker 官方版本

包含 Docker Engine、Docker Compose 插件、Docker Buildx 插件。

## 安装依赖

```bash
sudo apt update
sudo apt install -y ca-certificates curl gnupg
```

---

## 添加 Docker GPG key

```bash
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | \
  sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg
```

---

## 添加官方仓库

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

---

## 安装 Docker + Compose + Buildx

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

---

# 3. 验证安装

```bash
docker --version
docker compose version
docker buildx version
```

---

# 4. 常用命令

```bash
docker compose up -d
docker compose down
docker buildx build .
```