1.4. Upgrade Prerequisites
To perform an automated cluster upgrade from Ambari, your cluster must meet the following prerequisites:
|
Item |
Requirement |
Description |
|---|---|---|
|
Cluster |
Stack Version |
Must be running HDP 2.2 Stack. This capability is not available for HDP 2.0 or 2.1 Stacks. |
|
Version |
New Version |
All hosts must have the new version installed. |
|
HDFS |
NameNode HA |
NameNode HA must be enabled and working properly. See the Ambari User’s Guide for more information Configuring NameNode High Availability. |
|
HDFS |
Decommission |
No components should be in decommissioning or decommissioned state. |
|
YARN |
YARN WPR |
Work Preserving Restart must be configured. |
|
Hosts |
Heartbeats |
All Ambari Agents must be heartbeating to Ambari Server. Any hosts that are not heartbeating must be in Maintenance Mode. |
|
Hosts |
Maintenance Mode |
Any hosts in Maintenance Mode must not be hosting any Service master components. |
|
Services |
Services Started |
All Services must be started. |
|
Services |
Maintenance Mode |
No Services can be in Maintenance Mode. |
To perform an upgrade to a new version.
On the versions tab, click Perform Upgrade on the new version.
Follow the steps on the wizard.