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From "Francis Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-14169) API to refreshSuperUserGroupsConfiguration
Date Mon, 24 Aug 2015 17:07:46 GMT

    [ https://issues.apache.org/jira/browse/HBASE-14169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14709628#comment-14709628
] 

Francis Liu commented on HBASE-14169:
-------------------------------------

[~eclark] I only took a quick look at configuration, it seems the framework assumes that the
configuration changes are in the *-site.xml as it refreshes a Configuration object. For ProxyUsers
strictly speaking, the configuration change may not come from a *-site.xml change as ProxyUsers
instantiates a provider class (from the config) and that may have a different way of keeping
track of configurations. It'll be a bit clunky but I could use the same framework to refresh
ProxyUsers and that would save us from adding another AccessController rpc on the region server.
But we should at least have a different cli api and possibly still have a cp endpoint api
on the master as strictly speaking this shouldn't really fall into Configuration. Thoughts?

> API to refreshSuperUserGroupsConfiguration
> ------------------------------------------
>
>                 Key: HBASE-14169
>                 URL: https://issues.apache.org/jira/browse/HBASE-14169
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Francis Liu
>            Assignee: Francis Liu
>         Attachments: HBASE-14169.patch, HBASE-14169_2.patch, HBASE-14169_3.patch
>
>
> For deployments that use security. User impersonation (AKA doAs()) is needed for some
services (ie Stargate, thriftserver, Oozie, etc). Impersonation definitions are defined in
a xml config file and read and cached by the ProxyUsers class. Calling this api will refresh
cached information, eliminating the need to restart the master/regionserver whenever the configuration
is changed. 
> Implementation just adds another method to AccessControlService.



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