在配置JMX远程访问的时候,设置jmxremote.password文件权限,修改该文件时添加写权限,chmod +w jmxremote.password ,放开角色信息那俩行的注释,保存,再使用chmod 0400 jmxremote.password
这样就是它正确的权限设置
jmxremote.password 在jdk/jre/lib/management/下,jmxremote.password.template复制,去掉.template后缀
转载请注明出处:http://blog.csdn.net/l1028386804/article/details/51547408
2016年5月的最后一天,今天我将和大家分享Java中如何使用JMX来监控Tomcat的各种状态。好了,不多说了,我们直接进入主题
一、激活Tomcat的JMX远程配置
要通过JMX远程监控Tomcat,首先需要激活Tomcat的JMX远程配置。
① 修改脚本
先修改Tomcat的启动脚本,windows下为bin/catalina.bat(linux下为catalina.sh),添加以下内容,8999是jmxremote使用的端口号,第二个false表示不需要鉴权:
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- set JMX_REMOTE_CONFIG=-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false
- set CATALINA_OPTS=%CATALINA_OPTS% %JMX_REMOTE_CONFIG%
要注意以上语句的位置不能太后面,可以加在【if "%OS%" == "Windows_NT" setlocal】一句后的大段的注释后面。
参考官方说明:
http://tomcat.apache.org/tomcat-6.0-doc/monitoring.html#Enabling_JMX_Remote
http://tomcat.apache.org/tomcat-7.0-doc/monitoring.html#Enabling_JMX_Remote
http://tomcat.apache.org/tomcat-8.0-doc/monitoring.html#Enabling_JMX_Remote
http://tomcat.apache.org/tomcat-9.0-doc/monitoring.html#Enabling_JMX_Remote
② 鉴权
上面的配置是不需要鉴权的,如果需要鉴权则添加的内容为:
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- set JMX_REMOTE_CONFIG=-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=8999 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=true -Dcom.sun.management.jmxremote.password.file=../conf/jmxremote.password -Dcom.sun.management.jmxremote.access.file=../conf/jmxremote.access
- set CATALINA_OPTS=%CATALINA_OPTS% %JMX_REMOTE_CONFIG%
③ 复制并修改授权文件
$JAVA_HOME/jre/lib/management下有jmxremote.access和jmxremote.password的模板文件,将两个文件复制到$CATALINA_BASE/conf目录下
◆ 修改$CATALINA_BASE/conf/jmxremote.access 添加内容:
monitorRole readonly
controlRole readwrite
◆ 修改$CATALINA_BASE/conf/jmxremote.password 添加内容:
monitorRole chenfeng
controlRole chenfeng
注意: 如果进行了以上步骤导致Tomcat启动不了,那么很可能是密码文件的权限问题
需要修改jmxremote.password文件的访问权限,只有运行Tomcat的用户才能拥有访问权限 :
Windows的NTFS文件系统下,选中文件,点右键 -->“属性”-->“安全”--> 点“高级”--> 点“更改权限”--> 去掉“从父项继承....”--> 弹出窗口中选“删除”,这样就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(或用户组,如果选用户不行那就选用户组),例administrator,点“确定",“确定"。来到权限项目窗口,勾选“完全控制”,点“确定”,OK了。
官方的提示:
The password file should be read-only and only accessible by the operating system user Tomcat is running as.
④验证配置
重新启动Tomcat,在Windows命令行输入“netstat -a”查看配置的端口号是否已打开,如果打开,说明上面的配置成功了。
⑤ 使用jconsole测试JMX
运行$JAVA_HOME/bin目录下的jconsole.exe,打开J2SE监视和管理控制台,然后建立连接,如果是本地的Tomcat则直接选择然后点击连接,如果是远程的,则进入远程选项卡,填写地址、端口号、用户名、口令即可连接。。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。
二、使用JMX监控Tomcat示例代码
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- String jmxURL = "service:jmx:rmi:///jndi/rmi://192.168.10.93:8999/jmxrmi";
- JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
- Map map = new HashMap();
- // 用户名密码,在jmxremote.password文件中查看
- String[] credentials = new String[] { "monitorRole", "tomcat" };
- 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);
- // tomcat的线程数对应的属性值
- String attrName = "currentThreadCount";
- MBeanAttributeInfo[] mbAttributes = mbInfo.getAttributes();
- System.out.println("currentThreadCount:" + mbsc.getAttribute(threadObjName, attrName));
三、完整的示例代码文件
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- import java.lang.management.MemoryUsage;
- import java.text.SimpleDateFormat;
- import java.util.Date;
- import java.util.Formatter;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.Map;
- import java.util.Set;
- import javax.management.MBeanAttributeInfo;
- import javax.management.MBeanInfo;
- import javax.management.MBeanServerConnection;
- import javax.management.ObjectInstance;
- import javax.management.ObjectName;
- import javax.management.openmbean.CompositeDataSupport;
- import javax.management.remote.JMXConnector;
- import javax.management.remote.JMXConnectorFactory;
- import javax.management.remote.JMXServiceURL;
- /**
- * @author liuyazhuang
- * @date 2016-05-31
- */
- public class JMXTest {
- /**
- * main方法
- * @param args
- */
- public static void main(String[] args) {
- try {
- String jmxURL = "service:jmx:rmi:///jndi/rmi://127.0.0.1:8999/jmxrmi";
- JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
- Map map = new HashMap();
- String[] credentials = new String[] { "monitorRole", "tomcat" };
- 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();
- }
- }