Docker Compose在Windows正常运行但Ubuntu下异常，求排查解决

相同的Docker容器配置在Windows环境可正常运行，但在Ubuntu环境下访问出现502 Bad Gateway错误。

Windows下docker-compose ps输出： #

NAME                IMAGE                                      COMMAND                  SERVICE             CREATED             STATUS              PORTS
Laravel_nginx       nginx:stable-alpine                        "/docker-entrypoint.…"   nginx               2 days ago          Up 21 seconds       0.0.0.0:8000->80/tcp
Laravel_php         dockerized-laravel-8-vue3-typescript-php   "docker-php-entrypoi…"   php                 2 days ago          Up 22 seconds       0.0.0.0:9001->9000/tcp

Ubuntu下docker-compose ps输出： #

Name                    Command              State               Ports             
-----------------------------------------------------------------------------------------
laravel_nginx      docker-php-entrypoint php-fpm   Up      0.0.0.0:8080->80/tcp, 9000/tcp
laravel_php        docker-php-entrypoint php-fpm   Up      9000/tcp

附docker-compose.yaml配置： #

version: '3'

networks:
  webapp:

services:
  nginx:
    image: nginx:stable-alpine
    container_name: ${APP_NAME}_nginx
    ports:
    - "8080:80"
    links:
      - php
    volumes:
      - ./:/var/www/html
      - ./docker/nginx/site.conf:/etc/nginx/conf.d/default.conf:rw
      - ./docker/logs/nginx:/var/logs/nginx:rw
    depends_on:
      - php
    networks:
      - webapp
  php:
    build:
      context: .
      dockerfile: Dockerfile
    container_name: ${APP_NAME}_php
    volumes:
      - ./:/var/www/html
    ports:
      - "9001:9000"
    networks:
      - webapp

问题分析与解决步骤： #

从输出可见，Ubuntu环境下的nginx容器执行了错误的命令——本该运行nginx启动指令，却执行了php-fpm的命令，这说明nginx容器的镜像可能被错误覆盖。

• 清理旧容器与镜像，避免缓存干扰：

docker-compose down -v
docker rmi nginx:stable-alpine dockerized-laravel-8-vue3-typescript-php

• 重新构建并启动服务：

docker-compose build --no-cache
docker-compose up -d

• 检查Ubuntu环境下的APP_NAME环境变量，确保容器命名无冲突，避免镜像混淆
• 验证nginx配置文件docker/nginx/site.conf，确认其中指向php服务的端口为php:9000（同一网络下无需依赖主机端口映射）

内容的提问来源于stack exchange，提问作者shaher11