@Kumar Veerappan The Following kind of Ambari API call can show which NameNode is Active and which one is StandBy. Syntax: curl -iv -u admin:admin -H "X-Requested-By: ambari" -X GET "http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER_NAME/components/NAMENODE?ServiceComponentInfo/category=MASTER&fields=ServiceComponentInfo/service_name,host_components/metrics/dfs/FSNamesystem/HAState" Example: curl -iv -u admin:admin -H "X-Requested-By: ambari" -X GET "http://amb25101.example.com:8080/api/v1/clusters/plain_ambari/components/NAMENODE?ServiceComponentInfo/category=MASTER&fields=ServiceComponentInfo/service_name,host_components/metrics/dfs/FSNamesystem/HAState" . Example Output of the above call might look like: {
"href" : "http://amb25101.example.com:8080/api/v1/clusters/plain_ambari/components/NAMENODE?ServiceComponentInfo/category=MASTER&fields=ServiceComponentInfo/service_name,host_components/metrics/dfs/FSNamesystem/HAState",
"ServiceComponentInfo" : {
"category" : "MASTER",
"cluster_name" : "plain_ambari",
"component_name" : "NAMENODE",
"service_name" : "HDFS"
},
"host_components" : [
{
"href" : "http://amb25101.example.com:8080/api/v1/clusters/plain_ambari/hosts/amb25101.example.com/host_components/NAMENODE",
"HostRoles" : {
"cluster_name" : "plain_ambari",
"component_name" : "NAMENODE",
"host_name" : "amb25101.example.com"
},
"metrics" : {
"dfs" : {
"FSNamesystem" : {
"HAState" : "active"
}
}
}
},
{
"href" : "http://amb25101.example.com:8080/api/v1/clusters/plain_ambari/hosts/amb25102.example.com/host_components/NAMENODE",
"HostRoles" : {
"cluster_name" : "plain_ambari",
"component_name" : "NAMENODE",
"host_name" : "amb25102.example.com"
},
"metrics" : {
"dfs" : {
"FSNamesystem" : {
"HAState" : "standby"
}
}
}
}
]
* Connection #0 to host amb25101.example.com left intact
} .
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