Andrii Tkach commented on AMBARI-21700:

committed to branch-feature-AMBARI-21450

> Expose Patch Reversion in the Web Client
> ----------------------------------------
>                 Key: AMBARI-21700
>                 URL: https://issues.apache.org/jira/browse/AMBARI-21700
>             Project: Ambari
>          Issue Type: Task
>          Components: ambari-web
>    Affects Versions: 2.5.3
>            Reporter: Andrii Tkach
>            Assignee: Andrii Tkach
>            Priority: Blocker
>             Fix For: 2.5.3
>         Attachments: AMBARI-21700.patch, patch-revert.gif
> The web client will need to expose the ability to revert a patch which was 
> successfully applied to one or more services. Patch upgrades allows one or 
> more services to effectively be "patched" to a new version. Some facts:
> - Patching will only apply to the current stack. If the cluster was installed 
> with HDP 2.5, then all patches must be scoped to 2.5.x.y - you cannot patch 
> outside the stack.
> - Each service/component now exposes the repository version they are on. 
> The following work should be scoped in this Jira. If the scope turns out to 
> be too great, then it can be broken up into several JIras:
> - The stacks and versions page will change to show multiple "CURRENT" stacks.
> - The most recent patch will be able to be reverted. The revert button will 
> only show for the newest applied patch. Once reverted, the prior patch can be 
> reverted now.
> - If a full stack upgrade is performed, then the bar is reset, regardless the 
> version upgraded to.

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