openstack/vitrage
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7b1a0b65b6
vitrage/doc/source/contributor/nova-notifier.rst
Ifat Afek b27a29fde3 Some documentation changes 
- Added missing documentation of Nova notifier
- Moved osprofiler doc under contributor folder
- Marked the static-physical datasource as obsolete
- Removed a link to Aodh notifier (the document was deleted, as it was just a POC)

Depends-On: Ifcde995130486c859e6a9ce23e47a89910187732
Change-Id: Ib2b7880d65d4c6edd7cfd1f831da9da7af5e114c
2017-07-30 11:58:32 +00:00

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Vitrage Nova Notifier

Overview

The main purpose of Vitrage is to provide insights about the state of the system on problems that are not directly monitored. An example of such a problem is a switch failure that causes a Nova host to become unreachable, while Nova is not aware of this problem.

The Nova notifier tries to solve this use case, by calling Nova force-down API to notify Nova that the host is down.

Configuration

In order to support this use case, the user should perform the following:

  1. Activate the nova notifier. In /etc/vitrage/vitrage.conf:
[DEFAULT]
notifiers = nova
  1. Determine, in the Vitrage templates, what condition(s) indicates that the host is down. For example:
scenarios:
  - scenario:
    condition: host_down_alarm_on_host
      actions:
        action:
          action_type : mark_down
            action_target:
              target: host

For more information about the mark-down action, see the Vitrage templates documentation: templates