Andrii Tkach created AMBARI-21700:

             Summary: Expose Patch Reversion in the Web Client
                 Key: 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

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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