使用JMX监控Zookeeper状态Java API
一、背景
上一篇通过Java自带的JConsole来获取zookeeper状态。主要有几个不方便的地方,zk集群一般会部署3或者5台,在多个JConsole窗口中切换比较麻烦,各个zk服务及历史数据之间,不能直观比较。一般会做一个WEB管理页面来展示集群状态,设置报警阀值来做报警。
二、JVM平台提供Mbeans
在Java5.0以上版本,有一组API可以让Java应用程序和允许的工具监视和管理Java虚拟机(JVM)和虚拟机所在的本机操作系统。该组API在java.lang.management包。可以通过这些API可以监控local端JVM,同时也可以监控远端JVM。
通过静态工厂方法获取MXBean实例,从本地访问正在运行的虚拟机的MXBean接口。这些Bean我们从ManagementFactory类中定义的静态方法获取;如ManagementFactory.getOperatingSystemMXBean();其中不足就是只能获取本地的JVM状态。无法获取远程的虚拟机数据。
- ClassLoadingMXBeanJava虚拟机的类加载系统
- CompilationMXBeanJava虚拟机的编译系统
- MemoryMXBeanJava虚拟机的内存系统
- RuntimeMXBeanJava虚拟机的运行时系统
- OperatingSystemMXBeanJava虚拟机在其上运行的操作系统
- GarbageCollectorMXBeanJava虚拟机中的垃圾回收器
- MemoryManagerMXBeanJava虚拟机中的内存管理器
- MemoryPoolMXBeanJava虚拟机中的内存池
三、Zookeeper提供出来的Mbeans
构造MXBean代理实例,通过代理将方法调用转发到给定的MBeanServe。JConsole能够监控的项目,通过API都能获取到。
具体代码如下:
importjava.io.IOException; importjava.lang.management.ClassLoadingMXBean; importjava.lang.management.CompilationMXBean; importjava.lang.management.ManagementFactory; importjava.lang.management.OperatingSystemMXBean; importjava.lang.management.ThreadMXBean; importjava.util.ArrayList; importjava.util.Arrays; importjava.util.Collections; importjava.util.HashMap; importjava.util.Iterator; importjava.util.List; importjava.util.Map; importjava.util.Set; importjavax.management.InstanceNotFoundException; importjavax.management.IntrospectionException; importjavax.management.JMX; importjavax.management.MBeanServerConnection; importjavax.management.MalformedObjectNameException; importjavax.management.ObjectName; importjavax.management.ReflectionException; importjavax.management.remote.JMXConnector; importjavax.management.remote.JMXConnectorFactory; importjavax.management.remote.JMXServiceURL; importorg.apache.zookeeper.server.ConnectionMXBean; importorg.apache.zookeeper.server.DataTreeMXBean; importorg.apache.zookeeper.server.ZooKeeperServerMXBean; publicclassZkJMXTest{ staticJMXConnectorconnector; /** *@paramargs *@throwsIOException *@throwsMalformedObjectNameException *@throwsInstanceNotFoundException *@throwsReflectionException *@throwsIntrospectionException */ publicstaticvoidmain(String[]args)throwsIOException,MalformedObjectNameException, InstanceNotFoundException,IntrospectionException,ReflectionException{ OperatingSystemMXBeanosbean=ManagementFactory.getOperatingSystemMXBean(); System.out.println("体系结构:"+osbean.getArch());//操作系统体系结构 System.out.println("处理器核数:"+osbean.getAvailableProcessors());///核数 System.out.println("名字:"+osbean.getName());//名字 System.out.println(osbean.getVersion());//操作系统版本 ThreadMXBeanthreadBean=ManagementFactory.getThreadMXBean(); System.out.println("活动线程:"+threadBean.getThreadCount());//总线程数 ClassLoadingMXBeanclassLoadingMXBean=ManagementFactory.getClassLoadingMXBean(); CompilationMXBeancompilationMXBean=ManagementFactory.getCompilationMXBean(); System.out.println("==========="); //通过MBeanServer间接地访问MXBean接口 MBeanServerConnectionmbsc=createMBeanServer("192.168.1.100","9991","controlRole","123456"); //操作系统 ObjectNameos=newObjectName("java.lang:type=OperatingSystem"); System.out.println("体系结构:"+getAttribute(mbsc,os,"Arch"));//体系结构 System.out.println("处理器核数:"+getAttribute(mbsc,os,"AvailableProcessors"));//核数 System.out.println("总物理内存:"+getAttribute(mbsc,os,"TotalPhysicalMemorySize"));//总物理内存 System.out.println("空闲物理内存:"+getAttribute(mbsc,os,"FreePhysicalMemorySize"));//空闲物理内存 System.out.println("总交换空间:"+getAttribute(mbsc,os,"TotalSwapSpaceSize"));//总交换空间 System.out.println("空闲交换空间:"+getAttribute(mbsc,os,"FreeSwapSpaceSize"));//空闲交换空间 System.out.println("操作系统:"+getAttribute(mbsc,os,"Name")+getAttribute(mbsc,os,"Version"));//操作系统 System.out.println("提交的虚拟内存:"+getAttribute(mbsc,os,"CommittedVirtualMemorySize"));//提交的虚拟内存 System.out.println("系统cpu使用率:"+getAttribute(mbsc,os,"SystemCpuLoad"));//系统cpu使用率 System.out.println("进程cpu使用率:"+getAttribute(mbsc,os,"ProcessCpuLoad"));//进程cpu使用率 System.out.println("============");// //线程 ObjectNameThreading=newObjectName("java.lang:type=Threading"); System.out.println("活动线程:"+getAttribute(mbsc,Threading,"ThreadCount"));//活动线程 System.out.println("守护程序线程:"+getAttribute(mbsc,Threading,"DaemonThreadCount"));//守护程序线程 System.out.println("峰值:"+getAttribute(mbsc,Threading,"PeakThreadCount"));//峰值 System.out.println("启动的线程总数:"+getAttribute(mbsc,Threading,"TotalStartedThreadCount"));//启动的线程总数 ThreadMXBeanthreadBean2=ManagementFactory.newPlatformMXBeanProxy (mbsc,ManagementFactory.THREAD_MXBEAN_NAME,ThreadMXBean.class); System.out.println("活动线程:"+threadBean2.getThreadCount());//活动线程 ThreadMXBeanthreadBean3=ManagementFactory.getThreadMXBean(); System.out.println("本地活动线程:"+threadBean3.getThreadCount());//本地活动线程 System.out.println("============");// ObjectNameCompilation=newObjectName("java.lang:type=Compilation"); System.out.println("总编译时间毫秒:"+getAttribute(mbsc,Compilation,"TotalCompilationTime"));//总编译时间毫秒 System.out.println("============");// ObjectNameClassLoading=newObjectName("java.lang:type=ClassLoading"); System.out.println("已加载类总数:"+getAttribute(mbsc,ClassLoading,"TotalLoadedClassCount"));//已加载类总数 System.out.println("已加装当前类:"+getAttribute(mbsc,ClassLoading,"LoadedClassCount"));//已加装当前类 System.out.println("已卸载类总数:"+getAttribute(mbsc,ClassLoading,"UnloadedClassCount"));//已卸载类总数 System.out.println("==========================================================");// //http://zookeeper.apache.org/doc/r3.4.6/zookeeperJMX.html //org.apache.ZooKeeperService:name0=ReplicatedServer_id1,name1=replica.1,name2=Follower ObjectNamereplica=newObjectName("org.apache.ZooKeeperService:name0=ReplicatedServer_id1,name1=replica.1"); System.out.println("replica.1运行状态:"+getAttribute(mbsc,replica,"State"));//运行状态 mbsc=createMBeanServer("192.168.1.100","9992","controlRole","123456"); System.out.println("==============节点树对象==========="); ObjectNamedataTreePattern=newObjectName("org.apache.ZooKeeperService:name0=ReplicatedServer_id?,name1=replica.?,name2=*,name3=InMemoryDataTree"); SetdataTreeSets=mbsc.queryNames(dataTreePattern,null); Iterator dataTreeIterator=dataTreeSets.iterator(); //只有一个 while(dataTreeIterator.hasNext()){ ObjectNamedataTreeObjectName=dataTreeIterator.next(); DataTreeMXBeandataTree=JMX.newMBeanProxy(mbsc,dataTreeObjectName,DataTreeMXBean.class); System.out.println("节点总数:"+dataTree.getNodeCount());//节点总数 System.out.println("Watch总数:"+dataTree.getWatchCount());//Watch总数 System.out.println("临时节点总数:"+dataTree.countEphemerals());//Watch总数 System.out.println("节点名及字符总数:"+dataTree.approximateDataSize());//节点全路径和值的总字符数 Map dataTreeMap=dataTreeObjectName.getKeyPropertyList(); StringreplicaId=dataTreeMap.get("name1").replace("replica.",""); Stringrole=dataTreeMap.get("name2");//Follower,Leader,Observer,Standalone StringcanonicalName=dataTreeObjectName.getCanonicalName(); introleEndIndex=canonicalName.indexOf(",name3"); ObjectNameroleObjectName=newObjectName(canonicalName.substring(0,roleEndIndex)); System.out.println("==============zk服务状态==========="); ZooKeeperServerMXBeanZooKeeperServer=JMX.newMBeanProxy(mbsc,roleObjectName,ZooKeeperServerMXBean.class); System.out.println(role+"的IP和端口:"+ZooKeeperServer.getClientPort());//IP和端口 System.out.println(role+"活着的连接数:"+ZooKeeperServer.getNumAliveConnections());//连接数 System.out.println(role+"未完成请求数:"+ZooKeeperServer.getOutstandingRequests());//未完成的请求数 System.out.println(role+"接收的包:"+ZooKeeperServer.getPacketsReceived());//收到的包 System.out.println(role+"发送的包:"+ZooKeeperServer.getPacketsSent());//发送的包 System.out.println(role+"平均延迟(毫秒):"+ZooKeeperServer.getAvgRequestLatency()); System.out.println(role+"最大延迟(毫秒):"+ZooKeeperServer.getMaxRequestLatency()); System.out.println(role+"每个客户端IP允许的最大连接数:"+ZooKeeperServer.getMaxClientCnxnsPerHost()); System.out.println(role+"最大Session超时(毫秒):"+ZooKeeperServer.getMaxSessionTimeout()); System.out.println(role+"心跳时间(毫秒):"+ZooKeeperServer.getTickTime()); System.out.println(role+"版本:"+ZooKeeperServer.getVersion());//版本 //三个重置操作 //ZooKeeperServer.resetLatency();//重置min/avg/maxlatencystatistics //ZooKeeperServer.resetMaxLatency();//重置最大延迟统计 //ZooKeeperServer.resetStatistics();//重置包和延迟所有统计 System.out.println("==============所有客户端的连接信息==========="); ObjectNameconnectionPattern=newObjectName("org.apache.ZooKeeperService:name0=ReplicatedServer_id?,name1=replica.?,name2=*,name3=Connections,*"); Set connectionSets=mbsc.queryNames(connectionPattern,null); List connectionList=newArrayList (connectionSets.size()); connectionList.addAll(connectionSets); Collections.sort(connectionList); for(ObjectNameconnectionON:connectionList){ System.out.println("========================="); ConnectionMXBeanconnectionBean=JMX.newMBeanProxy(mbsc,connectionON,ConnectionMXBean.class); System.out.println("IP+Port:"+connectionBean.getSourceIP());// System.out.println("SessionId:"+connectionBean.getSessionId());// System.out.println("PacketsReceived:"+connectionBean.getPacketsReceived());//收到的包 System.out.println("PacketsSent:"+connectionBean.getPacketsSent());//发送的包 System.out.println("MinLatency:"+connectionBean.getMinLatency());// System.out.println("AvgLatency:"+connectionBean.getAvgLatency());// System.out.println("MaxLatency:"+connectionBean.getMaxLatency());// System.out.println("StartedTime:"+connectionBean.getStartedTime());// System.out.println("EphemeralNodes:"+connectionBean.getEphemeralNodes().length);// System.out.println("EphemeralNodes:"+Arrays.asList(connectionBean.getEphemeralNodes()));// System.out.println("OutstandingRequests:"+connectionBean.getOutstandingRequests());// //connectionBean.resetCounters(); //connectionBean.terminateConnection(); //connectionBean.terminateSession(); } } //closeconnection if(connector!=null){ connector.close(); } } /** *建立连接 *@paramip *@paramjmxport *@return */ publicstaticMBeanServerConnectioncreateMBeanServer(Stringip, Stringjmxport,StringuserName,Stringpassword){ try{ StringjmxURL="service:jmx:rmi:///jndi/rmi://"+ip+":" +jmxport+"/jmxrmi"; //jmxurl JMXServiceURLserviceURL=newJMXServiceURL(jmxURL); Map map=newHashMap (); String[]credentials=newString[]{userName,password}; map.put("jmx.remote.credentials",credentials); connector=JMXConnectorFactory.connect(serviceURL,map); MBeanServerConnectionmbsc=connector.getMBeanServerConnection(); returnmbsc; }catch(IOExceptionioe){ ioe.printStackTrace(); System.err.println(ip+":"+jmxport+"连接建立失败"); } returnnull; } /** *使用MBeanServer获取对象名为[objName]的MBean的[objAttr]属性值 * *静态代码:returnMBeanServer.getAttribute(ObjectNamename,Stringattribute) *@parammbeanServer *-MBeanServer实例 *@paramobjName *-MBean的对象名 *@paramobjAttr *-MBean的某个属性名 *@return属性值 */ privatestaticStringgetAttribute(MBeanServerConnectionmbeanServer, ObjectNameobjName,StringobjAttr){ if(mbeanServer==null||objName==null||objAttr==null) thrownewIllegalArgumentException(); try{ returnString.valueOf(mbeanServer.getAttribute(objName,objAttr)); }catch(Exceptione){ returnnull; } } }
总结
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