Docker Compose Tomcat无法连接到Postgresql

Question

I have 2 containers. One of them postgresql, one of them tomcat. I tried to start applications but always getting ohejdbc.spi.SqlExceptionHelper - Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections. error. Please help me i don't have much time. Best regards.

I tried different type of docker composes. But i got always same error.

16:48:09.557 [localhost-startStop-1] ERROR o.h.e.jdbc.spi.SqlExceptionHelper - Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

My connection url

db.user=admin
db.password=123456
db.url=jdbc:postgresql://moneytransferdb:5410/moneytransfer

My docker compose yml

version: '3'

services:
  moneytransferdb:
   image: postgres
   restart: always
   ports:
     - "5410:5432"
   volumes:
     - mydatavol:/var/lib/postgresql/data
   environment:
     POSTGRES_USER: admin
     POSTGRES_PASSWORD: 123456
     POSTGRES_DB: moneytransfer
   container_name: moneytransfer
   networks:
     - main
  tomcat:
    image: tomcat
    ports:
     - "8080:8080"
    volumes:
     - ../tcmb/tcmb-service.war:/usr/local/tomcat/webapps/tcmb.war
    container_name: tcmb
    depends_on:
     - moneytransferdb
    links:
     - moneytransferdb
    restart: always
    networks:
     - main
volumes:
  mydatavol: {}
networks:
  main:

Answer 1

Change your connection settings to this:

db.user=admin
db.password=123456
db.url=jdbc:postgresql://moneytransferdb:5432/moneytransfer

Port mappings make container ports available to the host but are not used by other containers. For them only container ports matter.