Add Nova reset-state notifier

Include the URL of your launchpad blueprint:

https://blueprints.launchpad.net/vitrage/+spec/add-nova-reset-state-notifier

When a host is marked as down, all the servers which are launched at the host should be with error status. Nova notifier will be extended to reset server state.

Problem description

As Vitrage works as the OPNFV Doctor Inspector component, when Vitrage receives alarm notifications from the Doctor monitor, it should map the physical resources to virtual resources and set their states appropriately. For the host down scenario, currently Vitrage only support to mark host down, the states of the servers which are launched at the host are still ‘Ok’ in Nova. And also in a real scenario, notifying Nova would help the user to get a clear picture of the state of its instances. So Nova notifier should be extended to call ‘reset-state’ API to reset server state.

Proposed change

Reuse ‘mark_down’ action type and set ‘instance’ as ‘action_target’ in Vitrage template which will call Nova api: ‘reset-state’ to set instance state.

Doctor Example

- scenario:
   condition: host_down_alarm_on_host and host_contains_instance and alarm_on_instance
   actions:
    - action:
       action_type: mark_down
       action_target:
         target: instance

Alternatives

None

Data model impact

None

REST API impact

None

Versioning impact

None

Other end user impact

None

Deployer impact

To use the Nova notifier, there is a need to define it in the Vitrage config file, and in addition use the ‘mark_down’ action for instances in Vitrage template.

Developer impact

None

Horizon impact

None

Implementation

Assignee(s)

Primary assignee:

dong wenjuan <dong.wenjuan@zte.com.cn>

Work Items

• Implement the ‘mark_down’ action for instances and tests

• Modify the host_down_scenario template for calling Nova reset-state

Dependencies

None

Testing

Unit tests and tempest tests need to be added.

Documentation Impact

The usage of the ‘mark_down’ action for instances will be documented.

References

Doctor inspector design guideline Support external actions in Vitrage templates