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.
Pre-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.
Important: Always ensure that you are using the most recent version of Ambari to perform your upgrade.
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Ensure all services in the cluster are running.
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Run each Service Check (found under the Service Actions menu) and confirm they execute successfully.
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Clear all alerts, or understand why they are being generated. Remediate as necessary.
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Confirm that the start and stop options for all services are executing successfully.
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Record the time it takes to start and stop each service. The time to start and stop services is a big contributor to overall upgrade time so having this information handy is useful.
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Download the software packages prior to the upgrade. Place them in a local repository and consider using a storage proxy because multi-gigabyte downloads are required on all nodes in the cluster.
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Ensure point-in-time backups are taken of all databases that support the cluster. This includes (among others) Ambari, Hive, Ranger, Druid, Superset, and Oozie.
