Cloudera Docs

Migrating from the Cloudera Manager External PostgreSQL Database Server to a MySQL/Oracle Database Server

Cloudera Manager provides an embedded PostgreSQL database server for demonstration and proof of concept deployments when creating a cluster. To remind users that this embedded database is not suitable for production, Cloudera Manager displays the banner text: "You are running Cloudera Manager in non-production mode, which uses an embedded PostgreSQL database. Switch to using a supported external database before moving into production."

If you have already used the embedded database, and you are unable to redeploy a fresh cluster, then you must migrate to an external PostgreSQL database.

Prerequisites

Before migrating from the Cloudera Manager external PostgreSQL database to an external MySQL/Oracle database, ensure that your setup meets the following conditions:
  • Configuration uses Cloudera Manager 5.15.0 or later on supported platforms.
  • You must have a valid Cloudera Manager Enterprise license.
  • If Cloudera Manager is secured, then you must import Kerberos account manager credentials and regenerate them.
  • You must have a destination host installed with the supported database of choice (MySQL or Oracle). For details about installing and configuring MySQL for Cloudera, see the topic Install and Configure MySQL for Cloudera Software. For details about installing and configuring Oracle for Cloudera, see the topic Install and Configure Oracle Database Software for Cloudera Software.
  • You have made configured target database hosts available.
  • You have planned for cluster downtime during the migration process.
  • You have a plan to follow service specific database migration instructions for services other than Cloudera Manager. Refer to the appropriate service migration documentation for your cluster setup.
  • No one has manually created any databases in the external database server for roles that will be migrated.
  • All health issues with your cluster are resolved.

For large clusters, Cloudera recommends running your database server on a dedicated host. Engage Cloudera Professional Services or a certified database administrator to correctly tune your external database server.