[jira] [Commented] (KNOX-2160) Monitoring and process refreshable service parameters in Knox

["Philip Zampino (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KNOX-2160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17011887#comment-17011887 ] 

Philip Zampino commented on KNOX-2160:
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There is already a way to update service params in a descriptor without using the Admin API/UI; The descriptors can be edited directly. While direct editing of descriptors requires access to the Knox host, it seems that the same is also required for this proposal.

 

> Monitoring and process refreshable service parameters in Knox
> -------------------------------------------------------------
>
>                 Key: KNOX-2160
>                 URL: https://issues.apache.org/jira/browse/KNOX-2160
>             Project: Apache Knox
>          Issue Type: New Feature
>          Components: Server
>    Affects Versions: 1.1.0, 1.2.0, 1.3.0
>            Reporter: Sandor Molnar
>            Assignee: Sandor Molnar
>            Priority: Major
>             Fix For: 1.4.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> It'd be beneficial if there was a way to update service parameters in a descriptor without using the Admin API/UI. The preferred approach is described as follows. I'd add 2 new configurations:
>  - {{refreshable.service.parameters.folder}} - optional configuration to indicate if Knox should monitor the given folder for service parameter changes. If it's {{null}} -> no monitoring is enabled.
>  - {{refreshable.service.parameters.folder.monitor.interval}} - indicates the time period Knox checks if any parameter changes were made; defaults to 60 seconds. This is relevant only if {{refreshable.service.parameters.folder}} is {{not null}}.
> A new monitor would be implemented (triggered only if monitoring is enabled) as follows:
>  # checks {{refreshable-service-parameters.xml}} within the configured {{refreshable.service.parameters.folder}}. The relevant configuration's name is {{refreshable.service.parameters}}.
>  # if there is new content (based on file timestamp) -> parse the file and build a new parameter list -> trigger topology redeployment with the new parameter list by rewriting the appropriate descriptor file.



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