vitrage-specs/specs/pike/approved/integration-with-mistral.rst

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Integration with Mistral

launchpad blueprint: https://blueprints.launchpad.net/vitrage/+spec/integration-with-mistral

Support executing Mistral workflows from Vitrage.

Problem description

Vitrage provides insights about the state of the cloud, but is not meant to be a policy engine. In order to take corrective actions, for example, we need to integrate an external engine like Mistral - the OpenStack workflow engine.

Proposed change

It will be possible to define in Vitrage templates that under certain conditions, a Mistral workflow should be executed. This gives the user the power to decide, for example, that different corrective actions should be taken based on the root cause of the problem (as identified by Vitrage).

Note that this blueprint is based on the external-actions blueprint, that handles the more general case.

Examples

- scenario:
   condition: host_down_alarm_on_host
   actions:
    - action:
       action_type: execute_mistral
       properties:
        workflow: wf1

Alternatives

Discussed in the external-actions blueprint.

Data model impact

None

REST API impact

None

Versioning impact

None

Other end user impact

None

Deployer impact

None

Developer impact

None

Horizon impact

None

Implementation

Assignee(s)

Primary assignee: ifat-afek

Work Items

• Implement the Mistral notifier
• Update the documentation

Dependencies

None

Testing

The implementation will be covered by unit tests and tempest tests.

Documentation Impact

The new action should be documented

References

None