THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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E.g.: Dashboard metrics : Fetch load average across all nodes of a cluster
| http://<ambari-server>:8080/api/v1/clusters/<cluster-name>?fields=metrics/load[1430844925,1430848525,15]&_=1430848532904 |
The above API call retrieves the load average, aggregated across all hosts in the cluster.
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E.g.: Host metrics: Get the cpu utilization on a particular host in the cluster
http://<ambari-server>:8080/api/v1/clusters/<cluster-name>/hosts/<host-name>?fields=metrics/cpu/cpu_user[1430844610,1430848210,15],metrics/cpu/cpu_wio[1430844610,1430848210,15],metrics/cpu/cpu_nice[1430844610,1430848210,15],metrics/cpu/cpu_aidle[1430844610,1430848210,15],metrics/cpu/cpu_system[1430844610,1430848210,15],metrics/cpu/cpu_idle[1430844610,1430848210,15]&_=1430848217591 |
The above API call retrieves all cpu related metrics required to chart out cpu utilization on a host page.
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E.g.: Service metrics: Get the capacity utilization metrics aggregated across all datanodes but only the latest value (point in time)
| http://<ambari-server>:8080/api/v1/clusters/<cluster-name>/services/HDFS/components/DATANODE?fields=metrics/dfs/datanode/DfsUsed,metrics/dfs/datanode/Capacity&_=1430849798630 |
The above API call retrieves two metrics values which represent the point in time metric value for the requested metrics obtained for the Metrics Service backend. (non JMX)
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E.g.: Daemon metrics: Get the heap memory usage for active Namenode
| http://<ambari-server>:8080/api/v1/clusters/<cluster-name>/hosts/<host-name>/host_components/NAMENODE?fields=metrics/jvm/memHeapCommittedM[1430847303,1430850903,15],metrics/jvm/memHeapUsedM[1430847303,1430850903,15]&_=1430850903846 |
The above API call retrieves JVM heap metrics for the Active Namenode in the cluster.
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