Internal DNS resolution (EAI_AGAIN) failing between Docker Compose App and Standalone Database

[DjeleGaddiel]

Description

I am struggling with internal network resolution on Coolify v4. My NestJS application (deployed via docker-compose.yml) cannot connect to my PostgreSQL and Redis services (deployed as standalone Coolify services).

Error

Logs show: Error: getaddrinfo EAI_AGAIN postgresql-database-gswok8sgw4og8gg0ogkg8sow and same for Redis.

My Setup

• App: NestJS deployed with a docker-compose.yml file.
• Database: PostgreSQL standalone service (Internal name: postgresql-database-gswok8sgw4og8gg0ogkg8sow).
• Network: I have added the following to my docker-compose.yml:

networks:
  coolify:
    external: true

services:
  api:
    networks:
      - coolify
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