docker nginx错误\u名称\u未\u解析

Question

运行4 docker容器：服务器/客户端/nginx/mongo反向代理客户端似乎在端口4200上工作，我可以看到我的应用程序和路由工作。当尝试注册用户时，我请求下面的http客户端帖子到名为“myserver”的Docker容器，该容器应该调用api。我得到这个DNS错误消息。

当在resolv上查看NGINX容器时。conf（显示127.0.0.11），它是正确的dns Docker，用于解析容器中的dns es。当我从容器内ping到另一个容器的名称时，它会工作。当我从服务器端口3000上的容器内外进行telnet时，它与客户端端口4200上的telnet一样工作，因此，当我尝试在我的网站上注册帐户时，无法解析myserver的原因可能是什么。这几乎就像是从容器外部调用register，因此无法解决它，这是正常行为吗？

  let url = 'http://myserver:3000/api/register';

docker撰写。yml版本：“3”

services:

  nginx:
      build: ./nginx
    # Map Nginx port 80 to the local machine's port 80
      volumes:
        - ./dist:/usr/share/nginx/html
      ports:
        - "80:80"
      depends_on: 
        - client
      networks:
        - app-network
   # Build the container using the client Dockerfile
  client:
      build: ./
    # This line maps the contents of the client folder into the container.
      volumes:
        - ./:/usr/src/app
      ports:
         - "4200:4200"
      networks:
        - app-network

  myserver:
      build: ./express-server
      volumes:
        - ./express-server:/usr/src/server
      environment:
        - NODE_ENV=development
      depends_on:
        - mongo
      ports:
        - "3000:3000"
      networks:
        - app-network

   # Link the client container so that Nginx will have access to it
  mongo:
      environment:
        - AUTH=yes
        - MONGO_INITDB_ROOT_USERNAME=superAdmin
        - MONGO_INITDB_ROOT_PASSWORD=admin123

      image: mongo
      volumes:
        - /var/mongodata/data:/data/db
      ports:
        - "27017:27017"
      networks:
        - app-network   

networks:
   app-network:
      driver: bridge

nginx默认值。形态

worker_processes 2 ;

events {
    worker_connections 1024;
}
http {
    upstream my-server {
    server myserver:3000;
    }

    upstream client {
    server client:4200;
    }

    server {
        
        location / {
            proxy_pass http://client;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
            proxy_set_header X-Forwarded-For $remote_addr;
        }
        location /api/ {
            proxy_pass http://my-server;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
            proxy_set_header X-Forwarded-For $remote_addr;
    }        
    }
}

cbdb2e00c6db        meanchat_nginx      "nginx -g 'daemon ..."   15 minutes ago      Up 15 minutes       0.0.0.0:80->80/tcp         meanchat_nginx_1
22406a1e9a31        meanchat_client     "npm start"              15 minutes ago      Up 15 minutes       0.0.0.0:4200->4200/tcp     meanchat_client_1
aa024855d201        meanchat_myserver   "npm start"              About an hour ago   Up 15 minutes       0.0.0.0:3000->3000/tcp     meanchat_myserver_1
b657bd6db7b5        mongo               "docker-entrypoint..."   5 hours ago         Up 15 minutes       0.0.0.0:27017->27017/tcp   b657bd6db7b5_meanchat_mongo_1

172.20.0.1 - - [09/Jan/2018:00:30:02 +0000] "GET /sockjs-node/info?t=1515457802565 HTTP/1.1" 200 90 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:03 +0000] "GET /register HTTP/1.1" 304 0 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:03 +0000] "GET /sockjs-node/044/zh1t2skg/websocket HTTP/1.1" 101 162 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"172.20.0.1 - - [09/Jan/2018:00:30:03 +0000] "GET /inline.bundle.js HTTP/1.1" 304 0 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:03 +0000] "GET /polyfills.bundle.js HTTP/1.1" 304 0 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:03 +0000] "GET /vendor.bundle.js HTTP/1.1" 304 0 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:03 +0000] "GET /styles.bundle.js HTTP/1.1" 304 0 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:03 +0000] "GET /scripts.bundle.js HTTP/1.1" 304 0 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:03 +0000] "GET /main.bundle.js HTTP/1.1" 200 796563 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:06 +0000] "GET /assets/img/cryptoowls.jpg HTTP/1.1" 304 0 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:06 +0000] "GET /roboto-v15-latin-regular.7e367be02cd17a96d513.woff2 HTTP/1.1" 304 0 "http://localhost/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"
172.20.0.1 - - [09/Jan/2018:00:30:06 +0000] "GET /sockjs-node/info?t=1515457806564 HTTP/1.1" 200 90 "http://localhost/register" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36"

172.20.0.1---[09/Jan/2018:03:31:24 0000]“GET/sockjs node/info？t=1515468684563 HTTP/1.1“200 90”http://localhost/register“Mozilla/5.0（Windows NT 10.0；Win64；x64）AppleWebKit/537.36（KHTML，类似Gecko）Chrome/63.0.3239.132 Safari/537.36”

Answer 1

评论的答复：

当使用反向代理连接到容器时，应用程序使用的所有URL都需要指向该反向代理，而不是应用程序。通常通过在URL中提供不带主机名的路径来实现。如果计划使用基于虚拟路径的反向代理，则需要更进一步，在URL中使用相对路径。这一切都需要在应用程序发送给客户端的响应中发生。