migration: emit migration lifecycle events#107
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Emit migration lifecycle events via the event monitor.
This aligns migration with other VM lifecycle operations such as boot,
pause, and resume, allowing external management software to observe
migration progress consistently.
Events emitted:
src:
vm.migration-started
vm.migration-downtime
vm.migration-finished
vm.migration-failed
vm.migration-cancelled
dst:
vm.migration-receive-started
vm.migration-receive-finished
vm.migration-receive-failed
Co-authored-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com
On-behalf-of: SAP leander.kohler@sap.com
Signed-off-by: Leander Kohler <leander.kohler@cyberus-technology.de>
Emit a "vm.migration-memory-iteration" event after every precopy memory iteration to allow management software to observe forward progress during migration. This event is primarily intended for integration with management software such as libvirt, where it maps to VIR_DOMAIN_EVENT_ID_MIGRATION_ITERATION. The event is intentionally independent of any upcoming migration metrics endpoint. Detailed migration statistics will be exposed via that endpoint, while this event provides a lightweight progress signal expected by external management layers. With this event, management software can detect forward progress during migration without being blocked on any upcoming migration metrics endpoint. Co-authored-by: Philipp Schuster <philipp.schuster@cyberus-technology.de> On-behalf-of: SAP philipp.schuster@sap.com On-behalf-of: SAP leander.kohler@sap.com Signed-off-by: Leander Kohler <leander.kohler@cyberus-technology.de>
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This PR ports and adapts the changes from @phip1611 in cloud-hypervisor#7799.
The goal is to simplify the propagation of migration-related events within libvirt, easing integration with libvirt's implementation and laying the groundwork for https://github.com/cobaltcore-dev/cobaltcore/issues/331.
Emitted events
Source:
Destination: