1.3 KiB
1.3 KiB
masakari-instancemonitor
Monitor Overview
The masakari-instancemonitor provides Virtual Machine High Availability for OpenStack clouds by automatically detecting VMs domain events via libvirt. If it detects specific libvirt events, it sends notifications to the masakari-api.
How does it work?
- It runs libvirt event loop in a background thread.
- Invoking libvirt.virEventRegisterDefaultImpl() will register libvirt's default event loop implementation.
- Invoking libvirt.virEventRunDefaultImpl() will perform one iteration of the libvirt default event loop.
- Invoking conn.domainEventRegisterAny() will register event callbacks against libvirt connection instances. The callbacks registered will be triggered from the execution context of libvirt.virEventRunDefaultImpl(), which will send notifications to the masakari-api.
- It will reconnect to libvirt and reprocess if disconnected.
Related configurations
This section in masakarimonitors.conf shows an example of how to configure the monitor.
[libvirt]
# Override the default libvirt URI.
connection_uri = qemu:///system