502坏网关：2个Docker容器之间的反向代理

感谢David指出的方向，这是我找到的解决方案。

首先，我配置了我的API nginx容器，通过在docker-composer中添加这些行，使其与我的反向代理nginx容器连接在同一个外部网络上。

networks: - api-server_default - default 

….

networks: api-server_default: external: true 

然后在反向代理容器的nginx.conf中，我不得不添加一些关于CORS限制的规则。

proxy_pass ${REACT_APP_DEV_API_URL}/; proxy_http_version 1.1; proxy_redirect off; proxy_set_header Connection $connection_upgrade; proxy_set_header Upgrade $http_upgrade; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; if ($request_method = 'OPTIONS') { add_header 'Access-Control-Max-Age' 1728000; add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Headers' 'Authorization,Accept,Origin,DNT,X-CustomHeader,Keep-Alive,User-Agent, X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range'; add_header 'Access-Control-Allow-Methods' 'GET,POST,OPTIONS,PUT,DELETE,PATCH'; add_header 'Content-Type' 'application/json'; add_header 'Content-Length' 0; return 204; } if ($request_method = 'POST') { add_header 'Access-Control-Allow-Origin' '*' always; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always; add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always; add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always; } if ($request_method = 'GET') { add_header 'Access-Control-Allow-Origin' '*' always; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always; add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range' always; add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range' always; }