[jira] [Reopened] (AMBARI-13054) Pre-Req Endpoint Should Be Used For Determining Upgrade Button Visibility

["Andrii Tkach (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-13054?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrii Tkach reopened AMBARI-13054:
-----------------------------------

I am unable to see the Upgrade button on a cluster where several hosts are in Maintenance Mode and do not have the stack.
We basically must always show the upgrade button; the web client should have no logic that hides it

> Pre-Req Endpoint Should Be Used For Determining Upgrade Button Visibility
> -------------------------------------------------------------------------
>
>                 Key: AMBARI-13054
>                 URL: https://issues.apache.org/jira/browse/AMBARI-13054
>             Project: Ambari
>          Issue Type: Task
>          Components: ambari-web
>    Affects Versions: 2.1.2
>            Reporter: Andrii Tkach
>            Assignee: Andrii Tkach
>            Priority: Critical
>             Fix For: 2.1.3
>
>         Attachments: AMBARI-13054-3.patch, AMBARI-13054.patch, AMBARI-13054_2.patch, AMBARI-13054_3.patch
>
>
> The web client currently uses a combination of host names, host_state, and stack versions to determine if an upgrade should be able to be performed for a given stack. If any of the hosts are missing the correct stack, then the option to upgrade to that stack is not permitted. The upgrade should be allowed, however, if the hosts which are missing the required stack are also in maintenance mode.
> The web client should begin using the prerequisite check API endpoint in order to calculate if the "Upgrade" button is to be visible for a specific stack. This allows the logic for calculating whether at stack is ready upgrade to remain on the Ambari Server.



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