码头工人ERR_NAME_NOT_RESOLVED http ajax [英] docker ERR_NAME_NOT_RESOLVED http ajax

问题描述

我有3个简单的微服务(mysql，apirest，gui)，我开始使用docker-compose:

I have 3 simple microservices (mysql, apirest, gui) that I start using docker-compose:

version: '3.2'
services:
  mysql:
  image: mysql/mysql-server:5.6
  container_name: mysql
  restart: always
  volumes:
    - mysql:/var/lib/mysql/data
  ports:
    - "3306:3306"
  networks:
    - mynetwork
  deploy:
    mode: replicated
    replicas: 1
  environment:
    - MYSQL_ROOT_PASSWORD=mypwd
    - MYSQL_USER=myuser
    - MYSQL_PASSWORD=myuserpwd
    - MYSQL_DATABASE=my-db
apirest:
  image: .....apirest:latest
  container_name: apirest
  restart: always
  volumes:
    - apirest:/apirest/tmp
  ports:
    - "30000:3000"
  networks:
    - mynetwork
  deploy:
    mode: replicated
    replicas: 2
gui:
  image: ......gui:latest
  container_name: gui
  restart: always
  links:
      - apirest
  ports:
    - "34200:4200"
  networks:
    - mynetwork

networks:
 mynetwork:

volumes:
 apirest:
 mysql:

mysql 和 apirest 微服务可以毫无问题地通信(我可以使用 mysql 从 apirest 连接到我的数据库作为主机名.

The mysql and the apirest microservices can communicate without problem (I can connect to my database from apirest using mysql as hostname.

但是，当我尝试使用 apirest 作为主机名执行http请求(角度)时，我在 gui 微服务中收到以下错误:

But I got the following error in the gui microservice as soon as I try to perform an http request (angular) using apirest as hostname:

无法加载资源:net :: ERR_NAME_NOT_RESOLVED

Failed to load resource: net::ERR_NAME_NOT_RESOLVED

从 gui 微服务中，我可以ping apirest :

from the gui microservice I can ping the apirest:

docker exec -it gui ping apirest

--- apirest ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 0.069/0.203/0.338 ms

如果我使用公共服务器地址( http://serverip:30000/api/test )执行http请求而不是 apirest ，则没有问题，http请求成功.

If I use the public server address (http://serverip:30000/api/test) to perform the http request instead of apirest there is no problem, the http request succeed.

我在做什么错??

谢谢

推荐答案

AJAX请求是浏览器请求，而不是服务器端请求，并且您的浏览器不是mynetwork的一部分. 发出ajax请求(客户端浏览器必须是公共域或具有服务节点端口的映射主机文件). 您仍然需要在浏览器主机中映射主机文件，或者在gui代码中使用带有服务节点端口的完整url.

AJAX request is the browser request not the server side request and your browser is not a part of mynetwork. To make ajax request (Client browser need to be public domains or map host file with service node port). You still need to map host file in your browser host machine or use full url with service node port in your gui code.

如果要避免使用端口，就我使用Nginx而言，代理是公开服务的最佳方法

if you want to avoid using port, proxying is the best way to expose service in my case I am using Nginx

GUI --- ajax请求(浏览器到服务器请求)-> PROXY(NGINX)---(服务器到服务器)-> apirest

GUI--- ajax req(browser to server req)----> PROXY(NGINX)---(server to server)--> apirest

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