How to fix "Error: getaddrinfo ENOTFOUND redis" on docker? - docker-compose

Question

I am using Redis using NestJS and I see following error. I am going through different articles like here and looks like I am following the same but still getting this error.
Steps:
I used docker compose up command
Made sure that host in redis.module.ts is same as service name in docker-compose.yml which is redis.
What am I missing here?
Error:
Error: getaddrinfo ENOTFOUND redis
at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:71:26)
Code:
redis.module.ts
import { CacheModule, Module } from '#nestjs/common';
import { ConfigModule, ConfigService } from '#nestjs/config';
import { RedisService } from './redis.service';
import * as redisStore from 'cache-manager-redis-store';
import { envVariables } from '../env.variables';
#Module({
imports: [
CacheModule.registerAsync({
imports: [ConfigModule],
inject: [ConfigService],
useFactory: async (configService: ConfigService) => ({
store: redisStore,
host: process.env.REDIS_HOST,
port: configService.get('REDIS_PORT'),
ttl: configService.get('CACHE_TTL'),
max: configService.get('MAX_ITEM_IN_CACHE'),
}),
}),
],
providers: [RedisService],
exports: [RedisService],
})
export class RedisModule {}
.env
#REDIS
REDIS_HOST=redis
docker-compose.yml
version: "3.8"
services:
partnersusers:
image: partnersusers
build:
context: .
dockerfile: ./Dockerfile
environment:
- RUN_ENV=dev
- NODE_ENV=development
ports:
- "4000:4000"
networks:
- default
redis:
image: 'redis:alpine'
ports:
- "6379:4000"
networks:
default:
driver: bridge
Error in Docker:

Answer 1

I'm not an expert, but I notice a couple of things on your docker-compose.yml file.
First your redis service is missing the network assignation:
networks:
- default
Without this, redis-commander won't be able to find it as it's not on the same network.
Second redis by default runs on port: 6379 if you want it to run on port 4000 I believe you will need to specify an env var for it.
Or here maybe you just confused the order of the port matching which should've been: 4000:6379 (host_port:container_port).
this is my working docker-compose.yml for reference:
---
version: '3.8'
services:
...
redis:
image: redis
container_name: redis
hostname: redis
environment:
- ALLOW_EMPTY_PASSWORD=yes
ports:
- '6379:6379'
networks:
- my-net
redis-commander:
depends_on:
- redis
container_name: redis-commander
hostname: redis-commander
image: rediscommander/redis-commander:latest
restart: always
environment:
- REDIS_HOSTS=local:redis:6379 # note: this has to be the port the redis container exposes.
ports:
- "8081:8081"
networks:
- my-net
networks:
my-net:
Hope this helps :)