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Masakari service overview
Masakari provides Virtual Machines High Availability(VMHA), and rescues KVM-based Virtual Machines(VM) from a failure events described below:
- VM process down - restart vm (use nova stop API, and nova start API).
Libvirt events will be also emitted by other failures.
- Provisioning process down - restarts process, changes nova-compute service
status to maintenance mode (use nova service-disable).
- nova-compute host failure - evacuate all the VMs from failure host to
reserved host (use nova evacuate API).
The below services enables deplores to integrate with the Masakari directly or through custom plug-ins.
The Masakari service consists of the following components:
An OpenStack-native REST API that processes API requests by sending them to the
masakari-engine over Remote Procedure Call (RPC).
Processes the notifications received from
masakari-api by executing the recovery workflow in asynchronous way.