[jira] [Commented] (IGNITE-3769) Visor CMD: improve script execution in alert command

["Valentin Kulichenko (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-3769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15438374#comment-15438374 ] 

Valentin Kulichenko commented on IGNITE-3769:
---------------------------------------------

Do we really need {{-i}}? It seems to me it only complicates the functionality without provide a lot of value. Can you give an example when it's really needed?

What user needs is an option to specify whether to repeatedly get notifications when the alert does not switch from 'red' to 'green'.

Everything else looks good.

> Visor CMD: improve script execution in alert command
> ----------------------------------------------------
>
>                 Key: IGNITE-3769
>                 URL: https://issues.apache.org/jira/browse/IGNITE-3769
>             Project: Ignite
>          Issue Type: Task
>          Components: visor
>    Affects Versions: 1.7
>            Reporter: Alexey Kuznetsov
>             Fix For: 1.8
>
>
> Current logic of executing custom scripts from alert command is not very usable and need to be improved.
> Suppose alert could be in two states: "red" (alert conditions evaluated as true) and "green".
> 1) Alert checks condition each t milliseconds (already implemented).
> 2) If alert detected "red" state then custom script should be executed. If script is not available - retry with specified rate.
> 3) After alert detected "red" state it should continue to check condition each t milliseconds and execute script no more than throttling timeout "-i",
>  this timeout could be "zero" that means that throttling disabled.
> 4) After alert detected "green" state then custom scrip executed with special "green state" flag.
> 5) When alert executed script it should pass to it how many times it was evaluated as "red state".
> Looks good?



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