API + how to verify data node disk by API

[#1]

on ambari GUI by clicking on HDFS --> config --> (we can see the data node folders that actually represented the worker disks)

how to use API in order to capture the number of disks from the blueprint ?

[#2 · Accepted solution]

@Michael Bronson

Looks like you want to fetch the details of "dfs.datanode.data.dir" property. In that case you can try using the following call. (please revert back if you are talking about a slightly different property)

Syntax:

# curl -sH "X-Requested-By: ambari" -u admin:admin -X GET "http://$AMBARI_HOSTNAME:8080/api/v1/clusters/$CLUSTER_NAME/configurations/service_config_versions?service_name=HDFS&is_current=true" | grep "\"dfs.datanode.data.dir\"" 

Example:

# curl -sH "X-Requested-By: ambari" -u admin:admin -X GET "http://amb25101.example.com:8080/api/v1/clusters/plain_ambari/configurations/service_config_versions?service_name=HDFS&is_current=true" | grep "\"dfs.datanode.data.dir\"" 

Output:

  "dfs.datanode.data.dir" : "/hadoop/hdfs/data",

.

Please replace the "$AMBARI_HOSTNMAE" and "$CLUSTER_NAME" based on your environment.

.