JMX监控Tomcat
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JMX监控Tomcat
环境:Tomcat5.5、jdk6
1、先配Tomcat的启动语句,window下tomcat的bin/catalina.bat(linux为catalina.sh),在头上注释部分(.bat为rem、.sh为#)后面加上set JAVA_OPTS=-Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=true
(linux为JAVA_OPTS=-Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=true)
2、修改jmx远程访问授权。默认为JAVA_HOME/jre/lib/management下jmxremote.access、jmxremote.password(缺省系统提供了个模版jmxremote.password.template改下名就成)
注意:linux下需要该权限,chmod 600 jmxremote.access, chmod 600 jmxremote.password
window下特麻烦,现需要jdk装在NTFS文件系统下,选中文件,点右键“属性”-〉安全,点“高级”,去掉“从父项继承....”,弹出窗口中选“删除”,这样删除了所有访问权限。再选“添加”-〉高级,“立即查找”,选中你的用户,例administrator,点“确定",“确定"。来到权限窗口,勾选"完全控制",点"确定",OK了。
3、用jconsole连接远程linux服务时, IP地址和port都输入正确的情况下,仍然是连接失败
vi /etc/hosts,将hostname对应的IP改为真实IP
4、测试JMX。启动tomcat,在window“命令行窗口”中输入netstat -an看下8999端口打开没有。若没有,则前面没配对。若已打开,则可在另一台机器的“命令行窗口”中输入jconsole,打开jdk自带的jmx客户端。选远程连接,录入tomcat所在机器的IP,端口例192.168.10.10:8999,帐号、密码在jmxremote.password中,如帐号controlRole,密码R&D(缺省monitorRole只能读,controlRole能读写,jmxremote.access中可配置)。点“连接”。看到图就行了。
5、关于数据。Mbean属性页中给出了相应的数据,Catalina中是tomcat的,java.lang是jvm的。对于加粗的黑体属性值,需双击一下才可看内容
5、关于编程。
- public class JMXTest {
- /**
- * @param args
- */
- public static void main(String[] args) {
- try {
- String jmxURL = "service:jmx:rmi:///jndi/rmi://192.168.10.93:8999/jmxrmi";//tomcat jmx url
- JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
- Map map = new HashMap();
- String[] credentials = new String[] { "monitorRole" , "QED" };
- map.put("jmx.remote.credentials", credentials);
- JMXConnector connector = JMXConnectorFactory.connect(serviceURL, map);
- MBeanServerConnection mbsc = connector.getMBeanServerConnection();
- //端口最好是动态取得
- ObjectName threadObjName = new ObjectName("Catalina:type=ThreadPool,name=http-8080");
- MBeanInfo mbInfo = mbsc.getMBeanInfo(threadObjName);
- String attrName = "currentThreadCount";//tomcat的线程数对应的属性值
- MBeanAttributeInfo[] mbAttributes = mbInfo.getAttributes();
- System.out.println("currentThreadCount:"+mbsc.getAttribute(threadObjName, attrName));
- //heap
- for(int j=0;j <mbsc.getDomains().length;j++){
- System.out.println("###########"+mbsc.getDomains()[j]);
- }
- Set MBeanset = mbsc.queryMBeans(null, null);
- System.out.println("MBeanset.size() : " + MBeanset.size());
- Iterator MBeansetIterator = MBeanset.iterator();
- while (MBeansetIterator.hasNext()) {
- ObjectInstance objectInstance = (ObjectInstance)MBeansetIterator.next();
- ObjectName objectName = objectInstance.getObjectName();
- String canonicalName = objectName.getCanonicalName();
- System.out.println("canonicalName : " + canonicalName);
- if (canonicalName.equals("Catalina:host=localhost,type=Cluster")) {
- // Get details of cluster MBeans
- System.out.println("Cluster MBeans Details:");
- System.out.println("=========================================");
- //getMBeansDetails(canonicalName);
- String canonicalKeyPropList = objectName.getCanonicalKeyPropertyListString();
- }
- }
- //------------------------- system ----------------------
- ObjectName runtimeObjName = new ObjectName("java.lang:type=Runtime");
- System.out.println("厂商:"+ (String)mbsc.getAttribute(runtimeObjName, "VmVendor"));
- System.out.println("程序:"+ (String)mbsc.getAttribute(runtimeObjName, "VmName"));
- System.out.println("版本:"+ (String)mbsc.getAttribute(runtimeObjName, "VmVersion"));
- Date starttime=new Date((Long)mbsc.getAttribute(runtimeObjName, "StartTime"));
- SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
- System.out.println("启动时间:"+df.format(starttime));
- Long timespan=(Long)mbsc.getAttribute(runtimeObjName, "Uptime");
- System.out.println("连续工作时间:"+JMXTest.formatTimeSpan(timespan));
- //------------------------ JVM -------------------------
- //堆使用率
- ObjectName heapObjName = new ObjectName("java.lang:type=Memory");
- MemoryUsage heapMemoryUsage = MemoryUsage.from((CompositeDataSupport)mbsc.getAttribute(heapObjName, "HeapMemoryUsage"));
- long maxMemory = heapMemoryUsage.getMax();//堆最大
- long commitMemory = heapMemoryUsage.getCommitted();//堆当前分配
- long usedMemory = heapMemoryUsage.getUsed();
- System.out.println("heap:"+(double)usedMemory*100/commitMemory+"%");//堆使用率
- MemoryUsage nonheapMemoryUsage = MemoryUsage.from((CompositeDataSupport)mbsc.getAttribute(heapObjName, "NonHeapMemoryUsage"));
- long noncommitMemory = nonheapMemoryUsage.getCommitted();
- long nonusedMemory = heapMemoryUsage.getUsed();
- System.out.println("nonheap:"+(double)nonusedMemory*100/noncommitMemory+"%");
- ObjectName permObjName = new ObjectName("java.lang:type=MemoryPool,name=Perm Gen");
- MemoryUsage permGenUsage = MemoryUsage.from((CompositeDataSupport)mbsc.getAttribute(permObjName, "Usage"));
- long committed = permGenUsage.getCommitted();//持久堆大小
- long used = heapMemoryUsage.getUsed();//
- System.out.println("perm gen:"+(double)used*100/committed+"%");//持久堆使用率
- //-------------------- Session ---------------
- ObjectName managerObjName = new ObjectName("Catalina:type=Manager,*");
- Set<ObjectName> s=mbsc.queryNames(managerObjName, null);
- for (ObjectName obj:s){
- System.out.println("应用名:"+obj.getKeyProperty("path"));
- ObjectName objname=new ObjectName(obj.getCanonicalName());
- System.out.println("最大会话数:"+ mbsc.getAttribute( objname, "maxActiveSessions"));
- System.out.println("会话数:"+ mbsc.getAttribute( objname, "activeSessions"));
- System.out.println("活动会话数:"+ mbsc.getAttribute( objname, "sessionCounter"));
- }
- //----------------- Thread Pool ----------------
- ObjectName threadpoolObjName = new ObjectName("Catalina:type=ThreadPool,*");
- Set<ObjectName> s2=mbsc.queryNames(threadpoolObjName, null);
- for (ObjectName obj:s2){
- System.out.println("端口名:"+obj.getKeyProperty("name"));
- ObjectName objname=new ObjectName(obj.getCanonicalName());
- System.out.println("最大线程数:"+ mbsc.getAttribute( objname, "maxThreads"));
- System.out.println("当前线程数:"+ mbsc.getAttribute( objname, "currentThreadCount"));
- System.out.println("繁忙线程数:"+ mbsc.getAttribute( objname, "currentThreadsBusy"));
- }
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- public static String formatTimeSpan(long span){
- long minseconds = span % 1000;
- span = span /1000;
- long seconds = span % 60;
- span = span / 60;
- long mins = span % 60;
- span = span / 60;
- long hours = span % 24;
- span = span / 24;
- long days = span;
- return (new Formatter()).format("%1$d天 %2$02d:%3$02d:%4$02d.%5$03d", days,hours,mins,seconds,minseconds).toString();
- }
- }
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