Preparing to Upgrade Ambari
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Be sure to review the Ambari Release Notes for the Ambari version to which you are upgrading, for Known Issues and Behavioral Changes.
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You must have root, administrative, or root-equivalent authorization on the Ambari Server host and all Ambari Agent hosts in the cluster.
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You must backup the Ambari Server database.
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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.
The following table lists recommended (
), and unsupported (X) upgrade paths.
| From / To | Ambari 2.7.x | Ambari 2.6.x |
|---|---|---|
| Ambari 2.6.x | |
X |
| Ambari 2.5x | X | |
| Ambari 2.4x | X | |
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.