jmx + karaf + logstash

10-input-karaf-jmx.conf

input {
    jmx {
        path => "/etc/logstash/jmx.conf"
        polling_frequency => 15
        type => "jmx"
        nb_thread => 4
    }
}

jmx.conf

{
  //Required, JMX listening host/ip
  "host" : "192.168.1.2",
  //Required, JMX listening port
  "port" : 1335,
  //Optional, the username to connect to JMX
  "username" : "user",
  //Optional, the password to connect to JMX
  "password": "pass",
  //Optional, use this alias as a prefix in the metric name. If not set use <host>_<port>
  "alias" : "test.homeserver.elasticsearch",
  //Required, list of JMX metrics to retrieve
  "queries" : [
  {
    //Required, the object name of Mbean to request
    "object_name" : "java.lang:type=Memory",
    //Optional, use this alias in the metrics value instead of the object_name
    "object_alias" : "Memory"
  }, {
    "object_name" : "java.lang:type=Runtime",
    //Optional, set of attributes to retrieve. If not set retrieve
    //all metrics available on the configured object_name.
    "attributes" : [ "Uptime", "StartTime" ],
    "object_alias" : "Runtime"
  }, {
    //object_name can be configured with * to retrieve all matching Mbeans
    "object_name" : "java.lang:type=GarbageCollector,name=*",
    "attributes" : [ "CollectionCount", "CollectionTime" ],
    //object_alias can be based on specific value from the object_name thanks to ${<varname>}.
    //In this case ${type} will be replaced by GarbageCollector...
    "object_alias" : "${type}.${name}"
  }, {
    "object_name" : "java.nio:type=BufferPool,name=*",
    "object_alias" : "${type}.${name}"
  } ]
}