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From "Zhe (Joe) Wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-15603) Exposure of Global Alert Repeat Tolerance Value in Web Client
Date Mon, 28 Mar 2016 18:12:25 GMT
Zhe (Joe) Wang created AMBARI-15603:
---------------------------------------

             Summary: Exposure of Global Alert Repeat Tolerance Value in Web Client
                 Key: AMBARI-15603
                 URL: https://issues.apache.org/jira/browse/AMBARI-15603
             Project: Ambari
          Issue Type: Task
          Components: ambari-web
    Affects Versions: 2.4.0
            Reporter: Zhe (Joe) Wang
            Assignee: Zhe (Joe) Wang
             Fix For: 2.4.0


The global repeat tolerance value for all alert definitions is set on the cluster-env configuration.
Unless an alert definition overrides this value, it will be used for any definition in the
system. By default, this value will be set to 1, indicating that there is no tolerance and
the alert state should be taken at face value.

{code}
GET api/v1/clusters/<cluster>/configurations?type=cluster-env&tag=<tag>

      "Config": {
        "cluster_name": "c1",
        "stack_id": "HDP-2.4"
      },
      "properties": {
        "command_retry_enabled": "true",
        "command_retry_max_time_in_sec": "600",
        ...
        "alerts_repeat_tolerance" : "1"
       ...
      }
{code}

The web client should expose a way to update the {{cluster-env}} to set this value. 

*UI Warning of Delayed Alerts*
When changing the value of the global of definition-specific repeat tolerance, a warning should
be presented to the user to indicate that it will now take longer for the alert notifications
to be sent. This is because notifications are delayed until the interval multiplied by the
repeat tolerance is reached. Consider the case where the check against an alert happens every
5 minutes and the repeat tolerance is set to 5. It will be at least 25 minutes before any
outbound notifications are dispatched. This warning can be on a per-alert definition basis
as well as when setting the global value.



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