Nest.js - elasticsearch connection inside docker containers - docker

Question

So I've been trying to connect my nest.js app to the elasticsearch connection but I have no idea why I can't.
app | (node:30) UnhandledPromiseRejectionWarning: ConnectionError: connect ECONNREFUSED 172.31.0.2:9200
app | at ClientRequest.onError (/usr/src/app/node_modules/#elastic/elasticsearch/lib/Connection.js:114:16)
This is the error I'm receiving. I'm composing my node.js app and elasticsearch engine in the same dockercompose file.
//docker-compose.yml
version: "3"
services:
app:
container_name: app
build:
context: .
target: development
volumes:
- .:/usr/src/app
- /usr/src/app/node_modules
ports:
- ${PORT}:${PORT}
command: npm run start:dev
networks:
- elastic
env_file:
- .env
depends_on:
- redis
- es01
es01:
image: docker.elastic.co/elasticsearch/elasticsearch:7.9.1
container_name: es01
environment:
- node.name=es01
- cluster.name=es-docker-cluster
- cluster.initial_master_nodes=es01
- bootstrap.memory_lock=true
- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
ulimits:
memlock:
soft: -1
hard: -1
volumes:
- data01:/usr/share/elasticsearch/data
ports:
- 9200:9200
networks:
- elastic
redis:
image: redis
container_name: redis
ports:
- "6379:6379"
redis-commander:
container_name: redis-commander
hostname: redis-commander
image: rediscommander/redis-commander:latest
restart: always
environment:
- REDIS_HOSTS=local:redis:6379
ports:
- "8081:8081"
volumes:
data01:
driver: local
networks:
elastic:
driver: bridge
//.env
ELASTICSEARCH_NODE=http://es01:9200
ELASTICSEARCH_USERNAME=elastic
ELASTICSEARCH_PASSWORD=admin
// backend nest.js implementation
#Module({
imports: [
ConfigModule,
ElasticsearchModule.registerAsync({
imports: [ConfigModule],
useFactory: async (configService: ConfigService) => ({
node: configService.get('ELASTICSEARCH_NODE'),
auth: {
username: configService.get('ELASTICSEARCH_USERNAME'),
password: configService.get('ELASTICSEARCH_PASSWORD'),
},
}),
inject: [ConfigService],
}),
],
controllers: [ContentSearchController],
providers: [ContentSearchService],
exports: [ElasticsearchModule, ContentSearchService],
})
This config was great, when I was developing my nest.js app externally (outside from docker-compose and using the localhost connection - http://localhost:9200).
Right now I was trying to move everything into dockerfile, I managed to achieve everything apart from this unfortunate connection with elasticsearch. Can anyone advice what am I doing wrong?