Docker容器从docker-compose中的postgres容器拒绝连接

Question

I've been beating my head against this for a few days now and I'm finally asking for help after trying to find the solution myself from all over.

services:
   db:
      image: ...
      container_name: db
      ports:
         - "8095:5432"
      networks:
         - mynetwork
   springservice:
      image: ...
      container_name: springservice
      depends_on:
         - db
      ports:
         - "8090:8090"
      networks:
         - mynetwork
      environment:
         - SPRING_DATASOURCE_URL: jdbc:postgresql://db:8095/dbname
         - SPRING_DATASOURCE_USER: user
         - SPRING_DATASOURCE_PASSWORD: password
networks:
   mynetwork:
      driver: bridge
      name: mynetwork

Answer 1

Your port mapping is meaningless inside the docker network. This is only a mapping to the host system. Inside the network, the container is always available on its native port<\/em> .

 - SPRING_DATASOURCE_URL: jdbc:postgresql://db:5432/dbname