Postgres container connection refused

Docker-compose with 2 containers. 1st is a Postgres database and 2nd is a Java Spring Boot application. For running, I use further docker-compose config file: docker-compose.yml

version: "3.7"    services:    db-service:      image: postgres      restart: always      volumes:        - /home/ec2-user/dbdata:/var/lib/postgresql/data      environment:        POSTGRES_USER: postgres        POSTGRES_PASSWORD: 1        POSTGRES_DB: auth      ports:        - 5432:5432      auth-service:      build: .      restart: always      depends_on:        - db-service      links:        - db-service      ports:        - 80:80  

I suppose to use /home/ec2-user/dbdata to containing database data and after all, data is created. successfully. And log of postgres container is:

PostgreSQL init process complete; ready for start 2021-01-07 01:36:16.786 UTC [1] LOG: starting PostgreSQL 13.1 (Debian 13.1-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit 2021-01-07 01:36:16.786 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432 2021-01-07 01:36:16.786 UTC [1] LOG: listening on IPv6 address "::", port 5432 2021-01-07 01:36:16.790 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432" 2021-01-07 01:36:16.795 UTC [76] LOG: database system was shut down at 2021-01-07 01:36:16 UTC 2021-01-07 01:36:16.800 UTC [1] LOG: database system is ready to accept connections

But Java app throws an error:

org.postgresql.util.PSQLException: Connection to 127.0.0.1:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

But in port mapping is 5432:5432.

And data source properties into Java app is:

spring.datasource.driver-class-name=org.postgresql.Driver  spring.datasource.url=jdbc:postgresql://127.0.0.1:5432/auth  spring.datasource.username=postgres  spring.datasource.password=1  

What is can be the reason for this error?

https://stackoverflow.com/questions/65605692/postgres-container-connection-refused January 07, 2021 at 10:00AM