NestJS Docker Postgres connection

Question

I have a problem, I can't figure out what the error is. Everything worked, the next day the server stopped connecting to the database. Created a new test project and the error is reproducible. But when I create a database with Docker and the server, everything is connected.

This gives an error, I don't understand what kind of rhombuses are

[Nest] 9964   - 2021-02-18 2:51:09 PM   [TypeOrmModule] Unable to connect to the database. Retrying (1)... +65ms
error: ������������ "admin" �� ������ �������� ����������� (�� ������)
    at Parser.parseErrorMessage (D:\Programs\Test_DB_Server\test-db\node_modules\pg-protocol\dist\parser.js:278:15)
    at Parser.handlePacket (D:\Programs\Test_DB_Server\test-db\node_modules\pg-protocol\dist\parser.js:126:29)
    at Parser.parse (D:\Programs\Test_DB_Server\test-db\node_modules\pg-protocol\dist\parser.js:39:38)
    at Socket.stream.on (D:\Programs\Test_DB_Server\test-db\node_modules\pg-protocol\dist\index.js:10:42)
    at Socket.emit (events.js:198:13)
    at addChunk (_stream_readable.js:288:12)
    at readableAddChunk (_stream_readable.js:269:11)
    at Socket.Readable.push (_stream_readable.js:224:10)
    at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)

so trying to connect

@Module({
  imports: [
    TypeOrmModule.forRoot({
      type: 'postgres',
      port: 5432,
      host: 'localhost',
      username: 'admin',
      password: 'admin',
      database: 'nestjs',
      entities: [],
    })
  ]
})
export class DatabaseModule {
}

docker compose

version: "3"
services:
  postgres:
    container_name: postgres_test
    image: postgres:latest
    ports:
      - "5432:5432"
    env_file:
      - docker.env

  pgadmin:
    links:
      - postgres:postgres
    container_name: pgadmin
    image: adminer
    ports:
      - "8080:8080"
    env_file:
      - docker.env

docker.env

POSTGRES_USER=admin
POSTGRES_PASSWORD=admin
POSTGRES_DB=nestjs

It is possible to connect to the database through the adminer, but it has not been connected through the TypeOrmModule since yesterday, and it correctly displays other errors (if the password is not correct, etc.). Help anyone with what you can.

Answer 1

You need to create network and bind them to same network to see each other. After that you can use "postgres" instead of localhost.

version: "3"
services:
  postgres:
    container_name: postgres_test
    image: postgres:latest
    networks:
      - server-net
    ports:
      - "5432:5432"
    env_file:
      - docker.env

  pgadmin:
    links:
      - postgres:postgres
    container_name: pgadmin
    image: adminer
    networks:
      - server-net
    ports:
      - "8080:8080"
    env_file:
      - docker.env
networks:
  server-net:
    driver: bridge