This script restarts all tez clients, hive clients, hcat clients, hive server, hive metastore and webhcat server using ambari REST API

restart_hadoop_components.sh

#!/bin/bash

curl -uadmin:admin -H 'X-Requested-By: ambari' -X POST -d '
{
   "RequestInfo":{
      "command":"RESTART",
      "context":"Restart Tez Clients on all nodes of the cluster",
      "operation_level":{
         "level":"HOST",
         "cluster_name":"SubexAnalytics"
      }
   },
   "Requests/resource_filters":[
      {
         "service_name":"TEZ",
         "component_name":"TEZ_CLIENT",
         "hosts":"node1.analytics.subex"
      },
      {
         "service_name":"TEZ",
         "component_name":"TEZ_CLIENT",
         "hosts":"node2.analytics.subex"
      },
      {
         "service_name":"TEZ",
         "component_name":"TEZ_CLIENT",
         "hosts":"node3.analytics.subex"
      },
      {
         "service_name":"TEZ",
         "component_name":"TEZ_CLIENT",
         "hosts":"node5.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"HCAT",
         "hosts":"node1.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"HCAT",
         "hosts":"node2.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"HCAT",
         "hosts":"node5.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"HIVE_CLIENT",
         "hosts":"node1.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"HIVE_CLIENT",
         "hosts":"node2.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"HIVE_CLIENT",
         "hosts":"node5.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"MYSQL_SERVER",
         "hosts":"node3.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"HIVE_SERVER",
         "hosts":"node3.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"HIVE_METASTORE",
         "hosts":"node3.analytics.subex"
      },
      {
         "service_name":"HIVE",
         "component_name":"WEBHCAT_SERVER",
         "hosts":"node3.analytics.subex"
      }
   ]
}' http://<SERVER_HOST>:<SERVER_PORT>/api/v1/clusters/<CLUSTERNAME>/requests