I believe this doc contains the information you're looking for: https://github.com/apache/ambari/blob/branch-2.1/ambari-server/docs/api/v1/alert-definitions.md#metric METRIC
METRIC source fields are used to define JMX endpoints that can be queried for values. The source/reporting and jmx/value fields are parameterized to match the property_list specified.
"source" : {
"jmx" : {
"property_list" : [
"java.lang:type=OperatingSystem/SystemCpuLoad",
"java.lang:type=OperatingSystem/AvailableProcessors"
],
"value" : "{0} * 100"
},
"reporting" : {
"ok" : {
"text" : "{1} CPU, load {0:.1%}"
},
"warning" : {
"text" : "{1} CPU, load {0:.1%}",
"value" : 200.0
},
"critical" : {
"text" : "{1} CPU, load {0:.1%}",
"value" : 250.0
},
"units" : "%"
},
"type" : "METRIC",
"uri" : {
"http" : "{{hdfs-site/dfs.namenode.http-address}}",
"https" : "{{hdfs-site/dfs.namenode.https-address}}",
"https_property" : "{{hdfs-site/dfs.http.policy}}",
"https_property_value" : "HTTPS_ONLY",
"default_port" : 0.0,
"high_availability" : {
"nameservice" : "{{hdfs-site/dfs.nameservices}}",
"alias_key" : "{{hdfs-site/dfs.ha.namenodes.{{ha-nameservice}}}}",
"http_pattern" : "{{hdfs-site/dfs.namenode.http-address.{{ha-nameservice}}.{{alias}}}}",
"https_pattern" : "{{hdfs-site/dfs.namenode.https-address.{{ha-nameservice}}.{{alias}}}}"
}
}
}
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