Merge pull request #27 from stackhpc/defining-alerts

Add section about defining alerts from Prometheus metrics

Author: priteau

source/operations_and_monitoring.rst

@@ -318,6 +318,13 @@ the monitoring service rather than the host being monitored).
    `known issue <https://github.com/prometheus/alertmanager/issues/1377>`__
    when running several Alertmanager instances behind HAProxy.
 
+Generating Alerts from Metrics
+++++++++++++++++++++++++++++++
+
+Alerts are defined in code and stored in Kayobe configuration. See ``*.rules``
+files in ``${KAYOBE_CONFIG_PATH}/kolla/config/prometheus`` as a model to add
+custom rules.
+
 Control Plane Shutdown Procedure
 ================================