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5.3. Upgrading Custom and Community Cartridges
The OpenShift Enterprise runtime contains a system for upgrading custom cartridges on a gear to the latest available version and for applying gear-level changes that affect cartridges.
The
oo-admin-upgrade command on the broker host provides the command line interface for the upgrade system and can upgrade all the gears in an OpenShift Enterprise environment, all the gears on a node, or a single gear. This command queries the OpenShift Enterprise broker to determine the locations of the gears to migrate and uses MCollective calls to trigger the upgrade for a gear.
Upgrade Process Overview
- Load the gear upgrade extension, if configured.
- Inspect the gear state.
- Run the gear extension's
pre-upgradescript, if it exists. - Compute the upgrade itinerary for the gear.
- If the itinerary contains an incompatible upgrade, stop the gear.
- Upgrade the cartridges in the gear according to the itinerary.
- Run the gear extension's
post-upgradescript, if it exists. - If the itinerary contains an incompatible upgrade, restart and validate the gear.
- Clean up after the upgrade by deleting pre-upgrade state and upgrade metadata.
See the OpenShift Enterprise Cartridge Specification Guide at https://access.redhat.com/site/documentation for more information on the cartridge upgrade process.
The
oo-admin-upgrade command can perform the following tasks, as described by the oo-admin-upgrade help command:
oo-admin-upgrade archive- Archives existing upgrade data in order to begin a completely new upgrade attempt.
oo-admin-upgrade help <task>- List available tasks or describe the designated task and its options.
oo-admin-upgrade upgrade-gear --app-name=<app_name>- Upgrades only the specified gear.
oo-admin-upgrade upgrade-node --version=<version>- Upgrades all gears on one or all nodes.
Important
Do not use the
oo-admin-upgrade upgrade-from-file task. The help output of the oo-admin-upgrade command does list upgrade-from-file as a valid task. However, it is not meant for direct use by an administrator and can invalidate an upgrade process.
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