NodeJS将Docker主机名转换为本地主机

Question

看起来，NodeJS正在将Redis容器主机名转换为本地主机。

这是我的档案：

.env

REDIS_HOST=redis-eventsystem
REDIS_PORT=6379
REDIS_SECRET=secret

index.ts

// there are things above this
let Redis = require('redis');
let client : any = Redis.createClient({
  host: process.env.REDIS_HOST,
  port: process.env.REDIS_PORT,
  legacyMode: true
});
client.on('error', (err : Error) : void => {
  console.error(
    `Redis connection error: ${err}`
  );
});
client.on('connect', (err : Error) : void => {
  console.info(
    `Redis connection success.`
  );
});
client.connect();
// there are things bellow this

docker-compose.yml

version: '3.8'
services:
  eventsystem:
    image: eventsystem
    restart: always
    depends_on:
      - "redis-eventsystem"
    ports:
      - "80:3000"
    networks:
      - eventsystem
  redis-eventsystem:
    image: redis
    command: ["redis-server", "--bind", "redis-eventsystem", "--port", "6379", "--protected-mode", "no"]
    restart: always
    networks:
      - eventsystem
networks:
  eventsystem:
    driver: bridge

码头日志

2022-11-21 17:50:41 eventsystem-redis-eventsystem-1  | 1:C 21 Nov 2022 20:50:41.106 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
2022-11-21 17:50:41 eventsystem-redis-eventsystem-1  | 1:C 21 Nov 2022 20:50:41.106 # Redis version=7.0.5, bits=64, commit=00000000, modified=0, pid=1, just started
2022-11-21 17:50:41 eventsystem-redis-eventsystem-1  | 1:C 21 Nov 2022 20:50:41.106 # Configuration loaded
2022-11-21 17:50:41 eventsystem-redis-eventsystem-1  | 1:M 21 Nov 2022 20:50:41.106 * monotonic clock: POSIX clock_gettime
2022-11-21 17:50:41 eventsystem-redis-eventsystem-1  | 1:M 21 Nov 2022 20:50:41.108 * Running mode=standalone, port=6379.
2022-11-21 17:50:41 eventsystem-redis-eventsystem-1  | 1:M 21 Nov 2022 20:50:41.108 # Server initialized
2022-11-21 17:50:41 eventsystem-redis-eventsystem-1  | 1:M 21 Nov 2022 20:50:41.108 * Ready to accept connections
2022-11-21 17:50:41 eventsystem-eventsystem-1        | 
2022-11-21 17:50:41 eventsystem-eventsystem-1        | > eventsystem@1.0.0 start
2022-11-21 17:50:41 eventsystem-eventsystem-1        | > node index.js serve
2022-11-21 17:50:41 eventsystem-eventsystem-1        | 
2022-11-21 17:50:42 eventsystem-eventsystem-1        | Application is listening at http://localhost:3000
2022-11-21 17:50:42 eventsystem-eventsystem-1        | Mon Nov 21 2022 20:50:42 GMT+0000 (Coordinated Universal Time) - Redis connection error: Error: connect ECONNREFUSED 127.0.0.1:6379

正如大家所看到的，IP 127.0.0.1拒绝连接，但是在我的应用程序中，redis被设置为用于容纳redis服务器的容器的主机名。我想不出有什么能引起这个问题的。

Answer 1

因此，为了回答我自己的问题，问题基本上与在我的代码中传递到createClient上的变量有关。

似乎出于某种未知的原因，host和port变量需要在createClient参数对象中的一个名为socket的变量中传递。

因此，不必执行通常的操作，而是在参数对象中传递host和port，而必须执行以下操作：

let client : any = Redis.createClient({
  host: process.env.REDIS_HOST,
  port: process.env.REDIS_PORT,
  socket: {
    host: process.env.REDIS_HOST,
    port: process.env.REDIS_PORT
  },
  legacyMode: true
});

希望能帮助除我之外的其他人。

干杯!