HDP upgrade checklist
You must ensure that your HDP cluster satisfies specific prerequisites before initiating the upgrade process.
You must review the 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 make a safe copy of the Ambari Server configuration file found at /etc/ambari-server/conf/
If your cluster is SSO-enabled, do not stop Knox before upgrading Ambari.