Upgrade from API Gateway 7.5.x

This topic describes how to upgrade from API Gateway 7.5.1 or later to API Gateway 7.5.3.

This topic contains the following sections:

What is different about upgrades from 7.5.x?

This section highlights the main differences when upgrading from 7.5.x versions compared to upgrading from 7.3.x or 7.4.x versions.

Apache Cassandra

In API Gateway 7.5.1 and later versions, the Apache Cassandra database is fully separated from the API Gateway (in earlier versions it was embedded with the API Gateway). This simplifies the upgrade process when upgrading from API Gateway 7.5.1 or later, as the data contained in Apache Cassandra does not need to be exported and imported along with the other configuration data.

These are the main differences in an upgrade from API Gateway 7.5.1 and later versions, compared to upgrades from 7.3.x or 7.4.x versions:

  • Your existing Apache Cassandra deployment can remain in place for use with API Gateway 7.5.3. There is no need to install a new Apache Cassandra deployment.
  • No data changes are necessary in the Apache Cassandra database, which means it can remain running throughout the upgrade, serving any upgraded API Gateways when they come online.

For more information, see Compare upgrades from 7.3.x or 7.4.x with upgrades from 7.5.x.

Caution    
  • During an upgrade, including zero downtime upgrade (ZDU), quotas are reset, meaning that your quotas might be too lenient for a period after the upgrade.
  • During a ZDU the old quota count and new quota count are in use at the same time.
  • Quota could be reduced during ZDU to protect individual instances from being overloaded.

projupgrade

Each API Gateway group has a configuration that is typically deployed as a .fed file. When you upgrade, configuration for all API Gateway groups is automatically upgraded during sysupgrade. However, you might have configuration files that were originally created in Policy Studio in a development environment that also need to be upgraded. If you upgraded from version 7.5.1 or later and you have several projects to upgrade, you can use the projupgrade tool. This tool upgrades several projects at once. For more information, see Upgrade an API Gateway project in the API Gateway DevOps Deployment Guide.

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