在Docker容器上连接Postgres数据源的Wildfly Swarm错误

Question

I am trying to build a simple rest service using Wildfly Swarm, Docker and PostgreSQL as database.

The application works well on localhost (without docker).

I am having problems to connect the database using a data source on docker infrastructure

This is my docker.compose.yml :

version: '3'

services:

  web:
    build: .
    depends_on:
      - db

  db:
    build: ./db
    ports:
      - "5432:5432"

My Web Dockerfile :

FROM fabric8/java-jboss-openjdk8-jdk:1.2.3

ENV AB_OFF true

ADD megasindico-billing-api-swarm.jar /opt/megasindico-billing-api-swarm.jar

EXPOSE 8080

ENTRYPOINT ["java", "-jar", "/opt/megasindico-billing-api-swarm.jar"]

PostgreSQL Dockerfile :

FROM postgres:9.4-alpine

ENV POSTGRES_USER=admin
ENV POSTGRES_PASSWORD=admin

project-defaults.yml is where is configure my DataSource:

swarm:
  datasources:
    data-sources:
      ### [datasource]
      megasindico-billing-ds:
        driver-name: postgresql
        connection-url: jdbc:postgresql://db/postgres
        user-name: admin
        password: admin

And heres how the persistence.xml looks like:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" 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">

    <persistence-unit name="megasindico-billing-ds" transaction-type="RESOURCE_LOCAL">

        <provider>org.hibernate.ejb.HibernatePersistence</provider>

        <properties>
            <property name="hibernate.hbm2ddl.auto" value="create-drop" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
            <property name="hibernate.hbm2ddl.import_files" value="scripts/reset.sql"/>
            <property name="hibernate.connection.useUnicode" value="true" />
            <property name="hibernate.connection.characterEncoding" value="UTF-8" />
        </properties>

    </persistence-unit>

</persistence>

The app is built using mvn clean package command.

To build the images I use a build.sh file:

#!/usr/bin/env bash

# Copy jar file to this directory
cp ../target/megasindico-billing-api-swarm.jar megasindico-billing-api-swarm.jar

# Build Docker image
docker-compose build

# Remove temp file
rm -rf megasindico-billing-api-swarm.jar

After that I execute docker-compose up command to get images running.

The errors I get are these:

Answer 1

Try adding -Djava.net.preferIPv4Stack=true to the Docker entry point, ie

ENTRYPOINT ["java", "-jar", "/opt/megasindico-billing-api-swarm.jar", "-Djava.net.preferIPv4Stack=true"]

And please copy and paste the text of the errors instead of posting screen shots. No one in the future searching for a similar issue will be able to find it as it's a screen shot.