[jira] [Commented] (AMBARI-7521) Adding a component to a host should check for the presence of host scope dependencies of that component

["Aleksandr Kovalenko (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-7521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14149290#comment-14149290 ] 

Aleksandr Kovalenko commented on AMBARI-7521:
---------------------------------------------

+1 for the patch

> Adding a component to a host should check for the presence of host scope dependencies of that component
> -------------------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-7521
>                 URL: https://issues.apache.org/jira/browse/AMBARI-7521
>             Project: Ambari
>          Issue Type: Task
>          Components: ambari-web
>    Affects Versions: 1.7.0
>            Reporter: Andrii Tkach
>            Assignee: Andrii Tkach
>            Priority: Critical
>             Fix For: 1.7.0
>
>         Attachments: AMBARI-7521.patch
>
>
> Host details page allows adding any uninstalled client component and some non-client component to the host. 
> But there are some components that have a host scope dependencies on another components. For example, Slider client won't function properly if HDFS client and YARN client are not installed with it on the same host and thus slider client has host scope dependencies on HDFS and YARN client. Such information is available from API.
> As a part of this ticket, ambari-web should maintain a map of host scope dependencies for every component in StackServiceComponent model. 
> On host page while adding a component, ambari-web code should check if the component's host scope dependencies are installed or not on that host. If not then show a single button ("OK") popup window informing the user to install them first:
> *popup window message:* 
> {code}"${ComponentNameTobeAdded} requires ${componentName},${componentName} and ${componentName} to be installed along with it. Please add them first and then try adding ${{ComponentNameTobeAdded}"{code}



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