Docker Compose部署多项目报错：路径./springboot未找到

1. 核心错误：springboot路径不存在 #

错误提示unable to prepare context: path "./springboot" not found，解决步骤：

• 检查项目目录结构，确保docker-compose.yml同级目录下存在springboot文件夹，用ls -l命令可直接查看
• 若实际路径不符，修改springboot服务的context参数，比如实际路径是./backend/springboot，则改为context: ./backend/springboot
• Linux下可执行chmod -R 755 ./springboot，确保目录具备可读权限

2. Angular服务的问题 #

配置中有两处明显问题：

• depends_on: - app：不存在名为app的服务，若Angular需调用SpringBoot接口，应改为depends_on: - springboot
• build: angular：需确保同级目录下有angular文件夹，且内部包含Dockerfile。生产环境不建议用ng serve直接运行，推荐构建静态文件后用Nginx托管，示例Dockerfile：

# Angular构建镜像示例
FROM node:18-alpine as build
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
RUN npm run build --prod

FROM nginx:alpine
COPY --from=build /app/dist/你的Angular项目名 /usr/share/nginx/html
COPY nginx.conf /etc/nginx/nginx.conf
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]

3. SpringBoot服务的优化与修正 #

• command: mvn clean spring-boot:run -dspring-boot.run.profiles=docker：直接在容器内运行Maven命令依赖本地缓存，建议先构建Jar包再制作镜像，示例Dockerfile：

# SpringBoot构建镜像示例
FROM maven:3.8.6-openjdk-11 as build
WORKDIR /app
COPY pom.xml .
RUN mvn dependency:go-offline
COPY src ./src
RUN mvn package -DskipTests

FROM openjdk:11-jre-slim
WORKDIR /app
COPY --from=build /app/target/*.jar app.jar
EXPOSE 8080
CMD ["java", "-jar", "app.jar", "--spring.profiles.active=docker"]

• depends_on: - nginx：SpringBoot无需依赖Nginx，通常是Nginx反向代理SpringBoot，可删除该依赖项
• 检查dockerfile: .docker/app/dockerfile路径，确保springboot目录下确实存在该文件

4. 修正后的docker-compose.yml示例 #

version: "3"
services:
  nginx:
    container_name: nginx
    image: nginx:1.13
    restart: always
    ports:
      - 80:80
      - 443:443
    volumes:
      - ./nginx/conf.d:/etc/nginx/conf.d
      # 若用Nginx托管Angular静态文件，添加此行
      # - ./angular/dist/你的项目名:/usr/share/nginx/html
    depends_on:
      - springboot

  angular:
    container_name: angular
    restart: always
    build: ./angular
    depends_on:
      - springboot
    # 仅开发环境用ng serve时需要端口映射，生产环境可删除
    ports:
      - "4200:4200"

  mysql:
    container_name: mysql
    image: mysql/mysql-server:5.7
    environment:
      MYSQL_DATABASE: test
      MYSQL_ROOT_PASSWORD: formation123
      MYSQL_ROOT_HOST: '%'
    ports:
      - 3306:3306
    restart: always
    # 添加数据卷持久化，避免容器删除丢失数据
    volumes:
      - mysql-data:/var/lib/mysql

  springboot:
    container_name: springboot
    restart: always
    build:
      context: ./springboot
      dockerfile: .docker/app/dockerfile
    expose:
      - "8080"
    depends_on:
      - mysql

# 定义MySQL数据持久化卷
volumes:
  mysql-data:

内容的提问来源于stack exchange，提问作者Christian