docker 反向代理：无法使 jwilder/nginx 反向代理与多个桥接网络一起工作

Question

我正在尝试在一个 VPS（基于 prestashop）上拥有多个网站，并且我正在使用 docker 来管理整个事情。 VPS 是运行ning DEBIAN 10.

我先有一个jwilder/nginx-proxy容器，这里是docker-compose.yml:

version: '3.8'

services:
  nginx-proxy:
    image: jwilder/nginx-proxy
    container_name: c_reverse_proxy
    ports:
      - 80:80
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
    networks:
      - net_reverse_proxy

networks:
 net_reverse_proxy:
  driver: bridge

然后我想使用以下 docker-compose.yml 动态创建 prestashops 的实例，由 bash 脚本创建并执行作为参数传递的子域的函数：

docker-compose.yml 对于子域“testben”：

version: '3.8'

services:
 db:
  image: mysql:5.7
  container_name: c_mysql_testben
  restart: always
  volumes:
   - /home/ben/shops/testben/mysql:/var/lib/mysql
  environment:
   MYSQL_ROOT_PASSWORD: AfeeRt0
  networks:
   - net_testben

 presta:
  image: prestashop/prestashop
  container_name: c_presta_testben
  expose:
   - 80
  restart: always
  volumes:
   - /home/ben/shops/testben/www:/var/www/html
   - /home/ben/shops/scripts/post_inst:/tmp/post-install-scripts
  environment:
   DB_SERVER: c_mysql_testben
   DB_USER: root
   DB_PASSWD: xxxxxxx
   PS_INSTALL_AUTO: 1
   PS_ERASE_DB: 0
   PS_LANGUAGE: fr
   PS_COUNTRY: FR
   PS_FOLDER_ADMIN: _admin
   PS_DOMAIN: testben.domain.com
   VIRTUAL_HOST: testben.domain.com
  depends_on:
   - db
  networks:
   - net_testben

networks:
 net_testben:
  driver: bridge

然后我将nginx反向代理容器连接到新创建的桥接网络：

docker network connect testben_net_testben c_reverse_proxy

到这个阶段，一切都已连接，我进入网络浏览器！

这不起作用，我在尝试访问时进入 firefox testben.domain.com

502 Bad Gateway nginx/1.17.6

以下是一些调试信息：

> docker logs c_reverse_proxy


dockergen.1 | 2020/08/07 16:01:04 Received event start for container 0cb8bc80f4fd
dockergen.1 | 2020/08/07 16:01:04 Generated '/etc/nginx/conf.d/default.conf' from 3 containers
2020/08/07 16:01:18 [notice] 50#50: signal process started
Generating DH parameters, 2048 bit long safe prime, generator 2
This is going to take a long time
dhparam generation complete, reloading nginx
nginx.1    | 2020/08/07 16:01:26 [error] 51#51: *1 no live upstreams while connecting to upstream, client: XXX.XXX.XXX.XXX, server: testben.domain.com, request: "GET / HTTP/1.1", upstream: "http://testben.domain.com/", host: "testben.domain.com"
nginx.1    | testben.domain.com XXX.XXX.XXX.XXX - - [07/Aug/2020:16:01:26 +0000] "GET / HTTP/1.1" 502 157 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:79.0) Gecko/20100101 Firefox/79.0"

反向代理自动生成配置：

    > docker exec c_reverse_proxy cat /etc/nginx/conf.d/default.conf
# If we receive X-Forwarded-Proto, pass it through; otherwise, pass along the
# scheme used to connect to this server
map $http_x_forwarded_proto $proxy_x_forwarded_proto {
  default $http_x_forwarded_proto;
  ''      $scheme;
}
# If we receive X-Forwarded-Port, pass it through; otherwise, pass along the
# server port the client connected to
map $http_x_forwarded_port $proxy_x_forwarded_port {
  default $http_x_forwarded_port;
  ''      $server_port;
}
# If we receive Upgrade, set Connection to "upgrade"; otherwise, delete any
# Connection header that may have been passed to this server
map $http_upgrade $proxy_connection {
  default upgrade;
  '' close;
}
# Apply fix for very long server names
server_names_hash_bucket_size 128;
# Default dhparam
ssl_dhparam /etc/nginx/dhparam/dhparam.pem;
# Set appropriate X-Forwarded-Ssl header
map $scheme $proxy_x_forwarded_ssl {
  default off;
  https on;
}
gzip_types text/plain text/css application/javascript application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
log_format vhost '$host $remote_addr - $remote_user [$time_local] '
                 '"$request" $status $body_bytes_sent '
                 '"$http_referer" "$http_user_agent"';
access_log off;
                ssl_protocols TLSv1.2 TLSv1.3;
                ssl_ciphers 'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384';
                ssl_prefer_server_ciphers off;
resolver 127.0.0.11;
# HTTP 1.1 support
proxy_http_version 1.1;
proxy_buffering off;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $proxy_connection;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $proxy_x_forwarded_proto;
proxy_set_header X-Forwarded-Ssl $proxy_x_forwarded_ssl;
proxy_set_header X-Forwarded-Port $proxy_x_forwarded_port;
# Mitigate httpoxy attack (see README for details)
proxy_set_header Proxy "";
server {
        server_name _; # This is just an invalid value which will never trigger on a real hostname.
        listen 80;
        access_log /var/log/nginx/access.log vhost;
        return 503;
}
# http://testben.domain.com
upstream http://testben.domain.com {
                                # Cannot connect to network of this container
                                server 127.0.0.1 down;
}
server {
        server_name http://testben.domain.com;
        listen 80 ;
        access_log /var/log/nginx/access.log vhost;
        location / {
                proxy_pass http://testben.domain.com;
        }
}

我认为问题出在：

 upstream http://testben.domain.com {
                                     # Cannot connect to network of this container
                                     server 127.0.0.1 down;
     }

好像接近this open issue

我在这里：

DNS 配置良好
prestashop docker-compose.yml 很好，如果我添加端口：- 8080:80，我可以在没有代理的情况下访问 te 站点
nginx 容器连接到专用桥接网络，可以看到 prestashop 容器启动

我会接受任何帮助、线索和建议。我希望避免的是将所有容器都放在一个桥接网络上，因为我希望在此服务器上运行的每个 prestashop 实例之间有最大的分离。

感谢您抽出时间阅读。

Answer 1

好的，我通过 my-self 找到了解决方案。发帖帮助别人！

问题是我在创建要代理的容器后将单独的网络 (testben_net_testben) 连接到 nginx 反向代理容器。所以在创建prestashop容器时，反向代理容器读取容器创建的socket，但是此时生成default.conf时，无法到达prestashop容器

解决方法是先创建网络，连接到反向代理，然后启动主服务，参考外部创建的网络。

第 1 步：

docker network create net_testben

第 2 步：

docker network connect net_testben c_reverse_proxy

第 3 步：

docker-compose up -d

与以下 docker-compose.yml

services:
 db:
  image: mysql:5.7
  container_name: c_mysql_testing
  restart: always
  volumes:
   - /home/ben/shops/testben/mysql:/var/lib/mysql
  environment:
   MYSQL_ROOT_PASSWORD: AfeeRt0
  networks:
   - net_testben

 presta:
  image: prestashop/prestashop
  container_name: c_presta_testing
  expose:
   - 80
  restart: always
  volumes:
   - /home/ben/shops/testben/www:/var/www/html
   - /home/ben/shops/scripts/post_inst:/tmp/post-install-scripts
  environment:
   DB_SERVER: c_mysql_testing
   DB_USER: root
   DB_PASSWD: xxxx
   PS_INSTALL_AUTO: 1
   PS_ERASE_DB: 0
   PS_LANGUAGE: fr
   PS_COUNTRY: FR
   PS_FOLDER_ADMIN: _admin
   PS_DOMAIN: testben.domain.com
   VIRTUAL_HOST: testben.domain.com
  depends_on:
   - db
  networks:
   - net_testben

networks:
 net_testben:
  external : true

docker 反向代理：无法使 jwilder/nginx 反向代理与多个桥接网络一起工作

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