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

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

Sumit Mohanty created AMBARI-4441:
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             Summary: 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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