[jira] [Commented] (AMBARI-4441) Add support for hbase decommisison

["Sumit Mohanty (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-4441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13883515#comment-13883515 ] 

Sumit Mohanty commented on AMBARI-4441:
---------------------------------------

This JIRA covers the changes to add the API support. The decommission BE support is not yet complete.

> Add support for hbase decommisison
> ----------------------------------
>
>                 Key: AMBARI-4441
>                 URL: https://issues.apache.org/jira/browse/AMBARI-4441
>             Project: Ambari
>          Issue Type: Bug
>          Components: controller
>    Affects Versions: 1.5.0
>            Reporter: Sumit Mohanty
>            Assignee: Sumit Mohanty
>             Fix For: 1.5.0
>
>
> Add the API support for hbase decommission. The API calls are:
> HBase decommission is different than the other decommissions. The decommission is actually a graceful stop of the RS allowing to move all the regions. This involves three steps from the perspective of API calls.
> * Mark the RS to be draining and start moving the regions out
> * Stop the RS
> * Get the RS out of draining mode
> {noformat}
> 1. curl -u admin:admin -H "X-Requested-By: ambari" -X POST -d '{"RequestInfo":{"context":"Decommission DataNode","command":"DECOMMISSION","service_name":"HBASE", "component_name":"HBASE_MASTER", "parameters":{"slave_type":"HBASE_REGIONSERVER", "excluded_hosts":"c6401.ambari.apache.org,c6403.ambari.apache.org"}}}' http://localhost:8080/api/v1/clusters/c1/requests
> 2. A call to STOP the region server being decommissioned
> 3. curl -u admin:admin -H "X-Requested-By: ambari" -X POST -d '{"RequestInfo":{"context":"Decommission DataNode","command":"DECOMMISSION","service_name":"HBASE", "component_name":"HBASE_MASTER", "parameters":{"slave_type":"HBASE_REGIONSERVER", "excluded_hosts":"c6401.ambari.apache.org,c6403.ambari.apache.org", "mark_draining_only":"true"}}}' http://localhost:8080/api/v1/clusters/c1/requests
> {noformat}
> These calls should be batched so that the order is maintained and if one call fails then the other calls can also fail. The tolerance for this batch should be 0.



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