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  • Using API to START/STOP services/host components.
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NOTE: This assumes the cluster is already installed.

Stopping/Starting a Service/Host Components.

1. Starting HDFS service
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start HDFS via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTER_NAME/services/HDFS
2. Stopping HDFS service
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Stop HDFS via REST"}, "Body": {"ServiceInfo": {"state": "INSTALLED"}}}' http://AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTER_NAME/services/HDFS

 

3. Starting/Stopping individual daemons (example Ganglia Monitor / Datanodes).
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"HostRoles": {"state": "STARTED"}}' http://AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTER_NAME/hosts/NEW_HOST_ADDED/host_components/GANGLIA_MONITOR
curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"HostRoles": {"state": "INSTALLED"}}' http://AMBARI_SERVER_HOST:8080/api/v1/clusters/CLUSTER_NAME/hosts/NEW_HOST_ADDED/host_components/DATANODE

 

Example:  Starting all standard Hadoop service
export $PASSWORD = *****
export $CLUSTER_NAME = {Your Cluster Name}

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start HDFS via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/HDFS

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start YARN via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/YARN

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start MAPREDUCE2 via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/MAPREDUCE2

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start HIVE via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/HIVE

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start TEZ via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/TEZ

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start HCATALOG via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/HCATALOG

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start WEBHCAT via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/WEBHCAT

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start ZOOKEEPER via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/ZOOKEEPER

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start NAGIOS via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/NAGIOS

curl -u admin:$PASSWORD -i -H 'X-Requested-By: ambari' -X PUT -d '{"RequestInfo": {"context" :"Start GANGLIA via REST"}, "Body": {"ServiceInfo": {"state": "STARTED"}}}' http://`hostname -f`:8080/api/v1/clusters/$CLUSTER_NAME/services/GANGLIA
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  1. Note: Once the curl command is accepted, the progress can be monitored in the Ambari Dashboard -> Ops