我们知道jmx可以将程序内部的信息暴露出来，但是要想监控这些信息的话，就还需要自己写java程序调用jmx接口去获取数据，并按照某种格式发送到其他地方（如监控程序zabbix,ganglia）。这时jmxtrans就派上用场了，jmxtrans的作用是自动去jvm中获取所有jmx格式数据，并按照某种格式（json文件配置格式）输出到其他应用程序（常用的有ganglia）
jvm需要加入以下参数
监控kafka信息发送到ganglia,/var/lib/jmxtrans/kafka.json
{
"servers": [
{
"port": "9999", # jmx 端口
"host": "127.0.0.1", # jmx 的主机
"queries": [
{
"outputWriters": [
{
"@class": "com.googlecode.jmxtrans.model.output.GangliaWriter",
"settings": {
"groupName": "jvmheapmemory",
"port": 8649,
"host": "127.0.0.1"
}
}
],
"obj": "java.lang:type=Memory",
"resultAlias": "heap",
"attr": [
"HeapMemoryUsage",
"NonHeapMemoryUsage"
]
},
{
"outputWriters": [
{
"@class": "com.googlecode.jmxtrans.model.output.GangliaWriter",
"settings": {
"groupName": "kafka topic stats",
"port": 8649, # ganglia的gmond端口
"host": "127.0.0.1", # ganglia 主机
"typeNames":[
"name"
]
}
}
],
"obj": "kafka.server:type=BrokerTopicMetrics,name=*",
"resultAlias": "Kafka",
"attr": [
"Count",
"OneMinuteRate"
]
},
{
"outputWriters": [
{
"@class": "com.googlecode.jmxtrans.model.output.GangliaWriter",
"settings": {
"groupName": "kafka server request",
"port": 8649,
"host": "127.0.0.1"
}
}
],
"obj":"kafka.server:type=OffsetManager,name=NumGroups",
"resultAlias": "OffsetManager NumGroups",
"attr": [
"Value"
]
},
{
"outputWriters": [
{
"@class": "com.googlecode.jmxtrans.model.output.GangliaWriter",
"settings": {
"groupName": "jvmGC",
"port": 8649,
"host": "127.0.0.1",
"typeNames": [
"name"
]
}
}
],
"obj": "java.lang:type=GarbageCollector,name=*",
"resultAlias": "GC",
"attr": [
"CollectionCount",
"CollectionTime"
]
}
],
"numQueryThreads": 2
}
]
}