java - Connection to localhost:5433 refused for using wildfly and postgres in two podman containers

Question

I have a problem running wildfly and postgres in two seperate containers (but both within one pod) using podman.

The general structure is:

• 2 pods (one wildfly and one postgres container) run within one pod
• the postgres port is exposed as 5433 (set by podman)
• wildfly tries to establish a connection with the postgres server (specified in persistence.xml and film-ds.xml)
• the postgres.jar is the JDBC driver for the postgres db and is located in wildfly -> deployments

Whenever I try to start the wildfly server (after the postgres is alredy up) I get the following exception:

Caused by: org.postgresql.util.PSQLException: Connection to localhost:5433 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

Can someone help me fixing this error?

The contents of the important files:

film-ds.xml: (located in wildfly -> deployments)

<datasource jndi-name="java:jboss/datasources/filmDS" pool-name="film" enabled="true" use-java-context="true">
    <connection-url>jdbc:postgresql://localhost:5433/dvdrentalfilm</connection-url>
    <driver>postgres.jar</driver>
    <security>
        <user-name>postgres</user-name>
        <password>*******</password>
    </security>
</datasource>

persistence.xml: (shipped with the war file in wildfly -> deployments)

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation= "http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd" version="2.1">

<persistence-unit name="default">
    <jta-data-source>java:jboss/datasources/filmDS</jta-data-source>
    ...
</persistence-unit>

setup.sh: (sets up the pods and containers)

podman pod create --name dvd --share cgroup,ipc,uts

podman build . -f film -t filmjavaimg

podman build . -f filmDB -t filmdbimg

podman run -p 5433:5432 -d --pod dvd --name filmDB filmdbimg

while ! nc -w 1 -z localhost 5433; do sleep 1; echo "Waiting for Postgres (Film)..."; done
    
podman run -p 5433:8080 -d --pod dvd filmjavaimg

Answer 1

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