Nginx代理（jwilder/nginx-proxy）通過對等方重置連接（502 Bad Gateway）

Question

我有簡單的docker-compose.yml，我希望能夠使用nginx作爲容器的代理。現在我有兩個容器admin和api，後來我想互相交談。

眼下與配置介紹如下，當我嘗試訪問api.host.dev我得到這個：

nginx-proxy  | nginx.1 | 2017/04/19 15:18:35 [error] 26#26: *1 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 192.168.60.1, server: api.host.dev, request: "GET/HTTP/1.1", upstream: "http://172.18.0.4:9000/", host: "api.host.dev" 
nginx-proxy  | nginx.1 | api.host.dev 192.168.60.1 - - [19/Apr/2017:15:18:35 +0000] "GET/HTTP/1.1" 502 576 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36" 

現在我種的想法。這裏是所有配置：*相關.ENV文件

version: '2' 
services: 
    nginx-proxy: 
     image: jwilder/nginx-proxy 
     container_name: nginx-proxy 
     ports: 
     - "80:80" 
     - "443:443" 
     volumes: 
     - /var/run/docker.sock:/tmp/docker.sock:ro 

    admin: 
     container_name: admin 
     image: php:7.1-fpm 
     restart: on-failure 
     volumes: 
      - ../admin:/var/www/admin 
     working_dir: /var/www 
     env_file: 
      - ./variables/dev-admin.env 

    api: 
     container_name: api 
     image: php:7.1-fpm 
     restart: on-failure 
     volumes: 
      - ../api:/var/www/api 
     working_dir: /var/www 
     env_file: 
      - ./variables/dev-api.env 

內容：

DEV-api.env：

APP_ENV=DEV 
VIRTUAL_HOST=api.host.dev 
VIRTUAL_PORT=9000 

DEV-admin.env：

APP_ENV=DEV 
VIRTUAL_HOST=admin.host.dev 
VIRTUAL_PORT=9000 

內容/etc/nginx/conf.d/default.conf：

# admin.host.dev 
upstream admin.host.dev { 
           ## Can be connect with "env_default" network 
         # admin 
         server 172.18.0.3:9000; 
} 
server { 
     server_name admin.host.dev; 
     listen 80 ; 
     access_log /var/log/nginx/access.log vhost; 
     location/{ 
       proxy_pass http://admin.host.dev; 
     } 
} 
# api.host.dev 
upstream api.host.dev { 
           ## Can be connect with "env_default" network 
         # api 
         server 172.18.0.4:9000; 
} 
server { 
     server_name api.host.dev; 
     listen 80 ; 
     access_log /var/log/nginx/access.log vhost; 
     location/{ 
       proxy_pass http://api.host.dev; 
     } 
} 

的docker-compose up完整輸出：

sudo docker-compose up --remove-orphans 
Recreating admin 
Recreating nginx-proxy 
Recreating api 
Attaching to admin, api, nginx-proxy 
admin | [19-Apr-2017 15:18:24] NOTICE: fpm is running, pid 1 
admin | [19-Apr-2017 15:18:24] NOTICE: ready to handle connections 
api  | [19-Apr-2017 15:18:24] NOTICE: fpm is running, pid 1 
api  | [19-Apr-2017 15:18:24] NOTICE: ready to handle connections 
nginx-proxy  | forego  | starting dockergen.1 on port 5000 
nginx-proxy  | forego  | starting nginx.1 on port 5100 
nginx-proxy  | dockergen.1 | 2017/04/19 15:18:25 Generated '/etc/nginx/conf.d/default.conf' from 3 containers 
nginx-proxy  | dockergen.1 | 2017/04/19 15:18:25 Running 'nginx -s reload' 
nginx-proxy  | dockergen.1 | 2017/04/19 15:18:25 Watching docker events 
nginx-proxy  | dockergen.1 | 2017/04/19 15:18:25 Contents of /etc/nginx/conf.d/default.conf did not change. Skipping notification 'nginx -s reload' 
nginx-proxy  | nginx.1 | 2017/04/19 15:18:35 [error] 26#26: *1 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 192.168.60.1, server: api.host.dev, request: "GET/HTTP/1.1", upstream: "http://172.18.0.4:9000/", host: "api.host.dev" 
nginx-proxy  | nginx.1 | api.host.dev 192.168.60.1 - - [19/Apr/2017:15:18:35 +0000] "GET/HTTP/1.1" 502 576 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36" 
nginx-proxy  | nginx.1 | 2017/04/19 15:18:45 [error] 26#26: *3 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 192.168.60.1, server: admin.host.dev, request: "GET/HTTP/1.1", upstream: "http://172.18.0.3:9000/", host: "admin.host.dev" 
nginx-proxy  | nginx.1 | admin.host.dev 192.168.60.1 - - [19/Apr/2017:15:18:45 +0000] "GET/HTTP/1.1" 502 576 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36" 
^[[A^[[Anginx-proxy  | nginx.1 | 2017/04/19 15:24:47 [error] 26#26: *5 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 192.168.60.1, server: api.host.dev, request: "GET/HTTP/1.1", upstream: "http://172.18.0.4:9000/", host: "api.host.dev" 
nginx-proxy  | nginx.1 | api.host.dev 192.168.60.1 - - [19/Apr/2017:15:24:47 +0000] "GET/HTTP/1.1" 502 576 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36" 

Answer 1

當使用組成，每個服務被暴露於使用其服務名其它容器，就好像它是一個DNS主機名。所以你想改變對例如admin.host.dev只需admin。例如，使用這樣的：在server聲明

# admin.host.dev 
upstream admin.host.dev { 
           ## Can be connect with "env_default" network 
         # admin 
         server admin:9000; 
} 

通知它現在使用的主機名admin。這會自動解析到您的admin容器的容器IP。

（但請注意我並沒有改變上行的名字 - 這是Nginx的內部名稱，你不一定需要去改變它）

你想改變的服務器名稱其他上游也是如此。