Remove the logic in the init scripts configuring the opennms-datasources.xml. https://github.com/OpenNMS/helm-charts/blob/e3d3ec4a10b4f9011a51d3f1307dd3323d5c8fd5/horizon/scripts/onms-core-init.sh#L286 The user should just use the environment variables we ship in our container image provided by confd.