This change enhances the Host Maintenance strategy by introducing
two new input parameters: `disable_live_migration` and
`disable_cold_migration`. These parameters allow cloud
administrators to control whether live or cold migration should be
considered during host maintenance operations.
If `disable_live_migration` is set, active instances will be cold
migrated if `disable_cold_migration` is not set, otherwise
active instances will be stopped. If `disable_cold_migration` is set,
inactive instances will not be cold migrated.
If both are set, only stop actions will be performed on instances.
The strategy logic and action plan generation have been updated to
reflect these behaviors. A new "stop" action is introduced and
registered, and the weight planner is updated to handle new action.
Documentation for the Host Maintenance strategy is updated to
describe the new parameters and their effects.
Test Plan:
- Unit tests for HostMaintenance strategy with new parameters
- Integration tests for action plan generation with stop action
This implements the specification:
Spec: https://review.opendev.org/c/openstack/watcher-specs/+/943873
Change-Id: I201b8e5c52e1bc1a74f3886a0e301e3c0fa5d351
Signed-off-by: Quang Ngo <quang.ngo@canonical.com>
Add clarifications to the documentation to reflect
the actual strategy usage, including:
- updating parameter descriptions
- extending the 'How to Use' section
Closes-Bug: #2111810
Change-Id: Ifd2876056cd8819c50658fb9f213246dc1546d42
