Docker compose and auth-server-url

Getting advice
1

Hi There,
I’m using Keycloak for the first time and I’m facing some problems using it in a docker-compose environment.
I create the following docker-compose file

version: '3.4'

services:
  postgresql:
    container_name: postgresql
    image: bitnami/postgresql:12.11.0
    volumes:
      - C:\Docker_files\postgresql:/bitnami/postgresql
    ports:
      - "5432:5432"
    environment:
      - POSTGRESQL_USERNAME=admin
      - POSTGRESQL_PASSWORD=admin
      - POSTGRESQL_DATABASE=keycloak
    networks:
      - onestore_network

  keycloak:
    container_name: KeyCloak
    image: bitnami/keycloak:18.0.0
    ports:
      - "8080:8080"
    environment:
      - KEYCLOAK_DATABASE_HOST=postgresql
      - KEYCLOAK_DATABASE_PORT=5432
      - KEYCLOAK_DATABASE_NAME=keycloak
      - KEYCLOAK_DATABASE_USER=admin
      - KEYCLOAK_DATABASE_PASSWORD=admin
      - KEYCLOAK_CREATE_ADMIN_USER=true
      - KEYCLOAK_ADMIN_USER=admin
      - KEYCLOAK_ADMIN_PASSWORD=admin
    depends_on:
      - postgresql
    hostname: keycloak
    networks:
      - onestore_network

  MyWebApp:
    container_name: MyWebApp
    environment:
      - TZ=Europe/Rome
      - ASPNETCORE_ENVIRONMENT=dev
      - ASPNETCORE_URLS=https://+:3002;http://+:3001
    image: ${DOCKER_REGISTRY-}mywebapp
    build:
      context: .
      dockerfile: MyWebApp/Dockerfile
    ports:
      - "3001:3001"
      - "3002:3002"
    volumes:
      - C:\Docker_files\logs\MyWebApp:/data/logs
    depends_on:
      - keycloak
    hostname: mywebapp
    networks:
      - onestore_network

networks:
  onestore_network:
     driver: bridge
     name: onestore_network

and I am not able to authenticate using keycloak.
I think the problem is in the auth-server-url, which is set to localhost:8080, as you can see below

{
  "realm": "docker_one_store",
  "auth-server-url": "http://localhost:8080/",
  "ssl-required": "external",
  "resource": "mywebapp",
  "credentials": {
    "secret": "V8IXKkwofEFZzaebNLabZjYnWn5QSMQe"
  },
  "confidential-port": 0
}

but from inside che container I need to use the contaner name (keycloak) instead of localhost.

If i connect to Keycloak from an app outside the container it works fine, so the realm configuration seems ok.

Can you help me solving this problem?

Thanks a lot :grinning: