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From "Antonenko Alexander (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-2770) NameNode HA Wizard: prerequisite checks
Date Tue, 30 Jul 2013 16:47:49 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-2770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13724040#comment-13724040
] 

Antonenko Alexander commented on AMBARI-2770:
---------------------------------------------

+1 for the patch
                
> NameNode HA Wizard: prerequisite checks
> ---------------------------------------
>
>                 Key: AMBARI-2770
>                 URL: https://issues.apache.org/jira/browse/AMBARI-2770
>             Project: Ambari
>          Issue Type: New Feature
>          Components: client
>    Affects Versions: 1.4.0
>            Reporter: Aleksandr Kovalenko
>            Assignee: Aleksandr Kovalenko
>             Fix For: 1.4.0
>
>         Attachments: AMBARI-2770.patch
>
>
> Prerequisite Checks
> When the user clicks on "Enable NameNode HA", we will perform the following checks:
> * If the cluster consists of less than 3 hosts, display the error message in a popup:
"You must have at least 3 hosts in your cluster to enable NameNode HA".
> * If the above check passes and if the cluster consists of less than 3 ZooKeeper Servers,
display the error message in a popup: "You must have at least 3 ZooKeeper Servers in your
cluster to enable NameNode HA".
> * If the above check passes and if the cluster is already secure, display the error message
in a popup: "You cannot enable NameNode HA via this wizard as your cluster is already secured.
 First, disable security by going to Admin > Security, and then run this Enable NameNode
HA wizard again.  After NameNode HA is enabled, you can go back to Admin > Security to
secure the cluster."
> The user cannot proceed forward in case any of the above errors have been encountered.

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