The procedure to upgrade an existing CTERA Portal installation is dependent on whether the upgrade involves upgrading the portal image or just the portal software. The release notes for each release specifies whether a portal image upgrade is required in addition to a portal software upgrade.

The CTERA Portal software can be upgraded as described in Upgrading Only the Portal Software.

Upgrading the Portal Image and Software describes how to upgrade both the image and software on all portal servers at once. You can also use this procedure to upgrade the image but not the software or the software and not the image as an alternative to the method described in Upgrading Only the Portal Software.

You can use the Upgrading the Portal Image and Software procedure to incrementally upgrade portal servers. You can upgrade the primary database server but not the replica database server until you have verified that the primary database server is fully functioning and only then upgrade the replica database server. Rerunning the upgrade multiple times only upgrades servers that were previously not upgraded and servers that were upgraded are not touched.