Ambari and HDP Upgrade Checklist

Before upgrading Ambari and HDP, you must review the checklist for activities that you must perform to ensure the cluster is ready for the upgrade.

Ambari upgrade checklist
When preparing to upgrade Ambari and the HDP Cluster, Cloudera recommends that you review this checklist to confirm that your cluster operation is healthy. Attempting to upgrade a cluster that is operating in an unhealthy state can produce unexpected results.
Download cluster blueprints without hosts
Ensure you download the cluster blueprints before you begin the upgrade. The blueprint of your old cluster is used as the template of the new cluster after you transition to Cloudera Manager.
HDP upgrade checklist
You must ensure that your HDP cluster satisfies specific prerequisites before initiating the upgrade to Ambari 7.1.x.x.
Checklist for large clusters
If you have a large cluster with a large data volume, you should configure the Ambari NameNode restart timeout parameter on the Ambari Server host, to ensure that the Ambari requests for starting the NameNode do not timeout during an upgrade.
Before upgrading any cluster
Prior to installing HDP intermediate bits using Ambari as a part of the CDP upgrade process, your cluster must meet the certain prerequisites to ensure that the cluster is in a healthy operating mode and can successfully manage the upgrade process.
Managing MPacks
You must review the information mentioned in this section before you proceed with the upgrade.
Changes to Ambari services and views
Review the list of additional components that are added to your cluster, along with the deprecated services and views that are removed during the process of upgrading to Ambari 7.1.x and HDP intermediate bits.
HDP Core component version changes
You must be aware of the version number changes for the core components included in HDP 3.1.5.x.
Upgrading the cluster’s underlying OS
Ensure that all your hosts in the cluster are on the operating systems supported with the HDP intermediate bits and Ambari 7.1.x.x before starting the upgrade from HDP 3.1.5.x to HDP intermediate bits.