Unable to use postgres with keycloak

Question

I am trying to use postgres with keycloak. following Doc

$ ls keycloak-9.0.0/modules/system/layers/keycloak/org/postgresql/main
  config.xml  postgresql-42.2.10.jar

This is the config.xml file. config.xml

<?xml version="1.0" ?>
<module xmlns="urn:jboss:module:1.3" name="org.postgresql">

    <resources>
        <resource-root path="postgresql-42.2.10.jar"/>
    </resources>

    <dependencies>
        <module name="javax.api"/>
        <module name="javax.transaction.api"/>
    </dependencies>
</module>

These are the changes that i have made in standalone.xml standalone.xml

<datasources>

    <datasource jndi-name="java:jboss/datasources/KeycloakDS" pool-name="KeycloakDS" enabled="true" use-java-context="true">
      <connection-url>jdbc:postgresql://localhost:5432/test</connection-url>
      <driver>postgresql</driver>
      <pool>
           <max-pool-size>20</max-pool-size>
      </pool>
      <security>
           <user-name>postgres</user-name>
           <password>StrongPassword</password>
      </security>
   </datasource>

    <drivers>
         <driver name="postgresql" module="org.postgresql">
              <xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
          </driver>
     </drivers>


</datasources>

<default-bindings context-service="java:jboss/ee/concurrency/context/default" datasource="java:jboss/datasources/KeycloakDS">

The error i am getting. error

06:13:39,430 ERROR [org.jboss.as.controller.management-operation] (ServerService Thread Pool -- 32) WFLYCTL0013: Operation ("add") failed - address: ([
    ("subsystem" => "datasources"),
    ("jdbc-driver" => "postgresql")
]) - failure description: "WFLYJCA0115: Module for driver [org.postgresql] or one of it dependencies is missing: [org.postgresql]"

How can i resolve this?

Answer 1

Can I suggest another way to configure this that is less likely to have an issue? I use the following to configure PostgreSQL and Keycloak and it has been working well. The key is to run this against a stopped Keycloak (using a fresh install). Save the below to something like setup-keycloak.cli:

embed-server --server-config=standalone.xml --std-out=echo

batch
#
# remove the default provided datasource
#
/subsystem=datasources/data-source=KeycloakDS/:remove

#
# add them
#
module add --name=org.postgres --resources=/path/to/postgresql-42.2.10.jar --dependencies=javax.api,javax.transaction.api
/subsystem=datasources/jdbc-driver=postgres:add(driver-name="postgres",driver-module-name="org.postgres",driver-class-name=org.postgresql.Driver)

/subsystem=datasources/data-source=KeycloakDS/:add(connection-url=jdbc:postgresql://localhost:5432/keycloak_database,driver-name=postgres,jndi-name=java:jboss/datasources/KeycloakDS,initial-pool-size=4,max-pool-size=64,min-pool-size=4,password=keycloak_user,user-name=keycloak_pass)

run-batch

Then run this with $KEYCLOAK_HOME/bin/jboss.sh --file=setup-keycloak.cli. This removes the KeycloakDS datasource, adds the PostgreSQL module, and recreates the KeycloakDS datasource with your parameters. You can use this to reproduce the configuration any time as long as you have a local copy of the PostgreSQL JDBC driver.