Preparing to Upgrade Ambari
Be sure to review the Ambari 2.7.4.0 release notes for Known Issues and Behavioral Changes.
You must have root, administrative, or root-equivalent authorization on the Ambari Server host and all Ambari Agent hosts in the cluster.
You must backup the Ambari Server database.
You must make a safe copy of the Ambari Server configuration file found at
/etc/ambari-server/conf/ambari.properties.If your cluster is SSO-enabled, do not stop Knox before upgrading Ambari.
![[Note]](../common/images/admon/note.png) | Note |
|---|---|
This guide specifically describes upgrading an Ambari-2.7.1-managed HDP-3.0.1 cluster to Ambari-2.7.4/HDP-3.1.4. If you need to upgrade from Ambari-2.6.x / HDP-2.6.x, use the instructions in the Ambari Major Upgrade Guide. |
During Ambari upgrade, the existing
/var/lib/ambari-server/ambari-env.sh file is overwritten and a backup
copy of ambari-env.sh (with extension .rpmsave) is
created. If you have manually modified ambari-env.sh (for example, to
change Ambari Server heap), you will need to re-apply your changes to the new file.
Next Steps
More Information