通过JMX访问在docker容器中运行的tomcat

Question

我想通过JMX获得tomcat的表现.Tomcat版本为7,Java版本为1.7.0_79.

Tomcat在docker的容器上运行.端口映射已通过以下设置.

docker run -itd -p 18080:8080 -p 19998:19998 -p 62911:62911 sad_jang2 bash

在tomcat容器中,在路径/ tomcat_home/bin /中创建了setevn.sh,其中包含以下内容.

export JAVA_OPTS="
-Xdebug -Xrunjdwp:transport=dt_socket,address=62911,server=y,suspend=n
-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=19998
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Djava.rmi.server.hostname=172.17.0.16"

我写了一个简单的java代码

JMXServiceURL serviceURL = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://" + "172.17.0.16"+ ":" + "19998" + "/jmxrmi");
JMXConnector connector = JMXConnectorFactory.connect(serviceURL, null);
MBeanServerConnection mbsc = connector.getMBeanServerConnection();

并且可以通过JMX获得相关值.

但是,我在我的桌面上使用docker主机的地址和19998端口运行此代码

JMXServiceURL serviceURL = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://" + "10.70.1.5"+ ":" + "19998" + "/jmxrmi");

控制台显示以下消息

java.rmi.ConnectException: Connection refused to host: 172.17.0.16; nested exception is: 
java.net.ConnectException: Connection timed out: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:130)
at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source)
at javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2432)
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:308)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:270)
at utility.GetStatistic.getTomcatStats(GetStatistic.java:84)
at exec.Main.main(Main.java:53)

Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at java.net.Socket.connect(Socket.java:538)
at java.net.Socket.<init>(Socket.java:434)
at java.net.Socket.<init>(Socket.java:211)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 9 more

使用浏览器连接URL http://10.70.1.5:18080可以显示tomcat root的页面.

谁能提出任何建议？谢谢.

Answer 1

这是我通过JMX成功用于监控ZooKeeper容器的标志:

-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.local.only=false
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.port=9010
-Dcom.sun.management.jmxremote.rmi.port=9010
-Djava.rmi.server.hostname=0.0.0.0
-Dcom.sun.management.jmxremote.ssl=false

所以区别在于此条目-Dcom.sun.management.jmxremote.rmi.port将RMI端口固定为与JMX端口相同.

有了这个,我可以docker run -p 9010:9010 ...,对我来说一切都很好.