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Charmed OpenStack Upgrader

Charmed OpenStack Upgrader (COU) is an application (packaged as a snap) to upgrade a Canonical distribution of Charmed OpenStack in an automated and frictionless manner. The application detects the version of the running cloud and proposes an upgrade plan to the next available OpenStack release.

For more information, please refer to COU Documentation.

Setup

The Charmed OpenStack Upgrader snap can be installed directly from the snap store:

sudo snap install charmed-openstack-upgrader

An alias cou will be automatically enabled upon successful installation.

Run cou -h to learn about the available commands:

Usage: cou [options] <command>

Charmed OpenStack Upgrader (cou) is an application to upgrade
a Canonical distribution of Charmed OpenStack.
The application auto-detects the version of the running cloud
and will propose an upgrade to the next available version.

Options:
  -h, --help           Show this help message and exit.
  --version, -V        Show version details.

Commands:
  {help,plan,upgrade}  For more information about a command, run 'cou help <command>'.
    plan               Show the steps COU will take to upgrade the cloud to the next release.
    upgrade            Run the cloud upgrade.

Environment Variables

  • JUJU_DATA - sets the path containing Juju configuration files (e.g. credentials.yaml). Defaults to ~/.local/share/juju
  • COU_TIMEOUT - define timeout for cou retry policy. Default value is 10 seconds.
  • COU_MODEL_RETRIES - define how many times to retry the connection to Juju model before giving up. Default value is 5 times.
  • COU_MODEL_RETRY_BACKOFF - define number of seconds to increase the wait between connection to the Juju model retry attempts. Default value is 2 seconds.
  • COU_STANDARD_IDLE_TIMEOUT - how long COU will wait for an application to settle to active/idle and declare the upgrade complete. The default value is 300 seconds.
  • COU_LONG_IDLE_TIMEOUT - a longer version of COU_STANDARD_IDLE_TIMEOUT for applications that are known to need more time than usual to upgrade like such as Keystone and Octavia. The default value is 2400 seconds.

Supported Upgrade Paths

Charmed OpenStack Upgrader (cou) supports the following upgrades:

From To
Focal/Ussuri Focal/Victoria
Focal/Victoria Focal/Wallaby
Focal/Wallaby Focal/Xena
Focal/Xena Focal/Yoga
Jammy/Yoga Jammy/Zed
Jammy/Zed Jammy/Antelope
Jammy/Antelope Jammy/Bobcat
Jammy/Bobcat Jammy/Caracal

License

Charmed OpenStack Upgrader is a free software, distributed under the Apache-2.0 license. Refer to the LICENSE file for details.