Support Questions
Find answers, ask questions, and share your expertise
Announcements
Check out our newest addition to the community, the Cloudera Innovation Accelerator group hub.

how to check that all datanode are up by REST API

we have ambari cluster ( HDP version 2.6.4 )

how to check that all datanode components ( HDFS ) are up by REST API ?

Michael-Bronson
1 ACCEPTED SOLUTION

Super Mentor

@Michael Bronson
Following API call will tell us how many DataNodes are live.

# curl -H "X-Requested-By: ambari" -u admin:admin -X GET  http://newhwx1.example.com:8080/api/v1/clusters/NewCluster/services/HDFS/components/DATANODE?fields=...

"started_count": Shows the live (running) DataNodes.
"total_count" : Shows how many DataNodes are there in the cluster.


In order to find out the Individual DataNode Status you will need to supply the hostnames where the DataNodes are installed in the following API call.

#  curl -H "X-Requested-By: ambari" -u admin:admin -X GET http://newhwx1.example.com:8080/api/v1/clusters/NewCluster/hosts/newhwx4.example.com/host_components...

(OR other host)

# curl -H "X-Requested-By: ambari" -u admin:admin -X GET http://newhwx1.example.com:8080/api/v1/clusters/NewCluster/hosts/newhwx1.example.com/host_components...

View solution in original post

1 REPLY 1

Super Mentor

@Michael Bronson
Following API call will tell us how many DataNodes are live.

# curl -H "X-Requested-By: ambari" -u admin:admin -X GET  http://newhwx1.example.com:8080/api/v1/clusters/NewCluster/services/HDFS/components/DATANODE?fields=...

"started_count": Shows the live (running) DataNodes.
"total_count" : Shows how many DataNodes are there in the cluster.


In order to find out the Individual DataNode Status you will need to supply the hostnames where the DataNodes are installed in the following API call.

#  curl -H "X-Requested-By: ambari" -u admin:admin -X GET http://newhwx1.example.com:8080/api/v1/clusters/NewCluster/hosts/newhwx4.example.com/host_components...

(OR other host)

# curl -H "X-Requested-By: ambari" -u admin:admin -X GET http://newhwx1.example.com:8080/api/v1/clusters/NewCluster/hosts/newhwx1.example.com/host_components...