No cron type of job to refresh retrofitted image

[Nobuto Murata]

For example, charm-glance-simplestreams-sync charm has an option as "run" to enable cron job to fetch up-to-date cloud images with the latest security fixes included.
https://jaas.ai/glance-simplestreams-sync#charm-config-run

charm-octavia-diskimage-retrofit doesn't have such option so "retrofit-image" action has to be invoked by hand each time if I'm not mistaken.

Would be nice to have a way to refresh the retrofitted image periodically to have the latest security fixes out of the box.

[Alex Kavanagh (ajkavanagh)]

Triage: Sounds like a useful feature to have.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/charm-octavia-diskimage-retrofit/+/830792

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/charm-octavia-diskimage-retrofit/+/830792
Committed: https://opendev.org/openstack/charm-octavia-diskimage-retrofit/commit/00036c8151667baeff1297dcfa38824d6fd5f16a
Submitter: "Zuul (22348)"
Branch: master

commit 00036c8151667baeff1297dcfa38824d6fd5f16a
Author: Marcin Wilk <email address hidden>
Date: Tue Feb 22 12:03:17 2022 +0000

    Add support for refreshing images by cron

    This change adds charm config parameters: `auto-retrofit` and
    `frequency` that control if a cron job is added to periodically
    refresh retrofitted images based on corresponding glance images.

    Closes-Bug: #1937013
    Change-Id: I5e12f1a5ea4fe94aebc307484ac68a00a1f3f5fa