block4.xml

<datasource jndi-name="java:jboss/datasources/ClusteringDS" pool-name="ClusteringDS" enabled="true" use-java-context="true" use-ccm="true">
    <connection-url>jdbc:postgresql://${env.POSTGRES_DB_HOST}:${env.POSTGRES_DB_PORT}/jbossclustering</connection-url>
    <driver>postgresql</driver>
    <security>
        <user-name>${env.DB_USER}</user-name>
        <password>${env.DB_PASSWORD}</password>
    </security>
    <validation>
        <check-valid-connection-sql>SELECT 1</check-valid-connection-sql>
        <background-validation>true</background-validation>
        <background-validation-millis>60000</background-validation-millis>
    </validation>
</datasource>