Java JVM

使用JMX管理和监控JVM

JMX（Java Management Extensions，即Java管理扩展）是一个为应用程序、设备、系统等植入管理功能的框架。JMX可以跨越一系列异构操作系统平台、系统体系结构和网络传输协议，灵活的开发无缝集成的系统、网络和服务管理应用。

配置jmx

1. 用户名密码的方式

复制模板文件

cp $JAVA_HOME/jre/lib/management/jmxremote.password.template /opt/conf/jmxreomte/jmxremote.password

配置示例

# The "monitorRole" role has password "QED".
# The "controlRole" role has password "R&D".
monitorRole QED
controlRole R&D

权限配置


chown nobody.nobody jmxremote.password
chmod 600 jmxremote.password

其中，chmod 600 jmxremote.password 等同于 chmod u=rw,g=-,o=- jmxremote.password

resin中的配置

1. 默认开启jmxremote
<cluster-default>
    <!-- sets the content root for the cluster, relative to server.root -->
    <root-directory>.</root-directory>

    <server-default>
    <!--
        - The JVM arguments
    -->
        <jvm-arg>-d64</jvm-arg>
        <jvm-arg>-Xmx4096m</jvm-arg>
        <jvm-arg>-Xms4096m</jvm-arg>
        <jvm-arg>-Xmn1536m</jvm-arg>
        <jvm-arg>-Xss2m</jvm-arg>
        <jvm-arg>-Xdebug</jvm-arg>
        <jvm-arg>-XX:MaxPermSize=512m</jvm-arg>
        <jvm-arg>-Dcom.sun.management.jmxremote</jvm-arg>
        <jvm-arg>-Dcom.sun.management.jmxremote.ssl=false</jvm-arg>
        <jvm-arg>-Dcom.sun.management.jmxremote.authenticate=true</jvm-arg>
2.具体实例监听的IP与端口
<cluster id="cluster-01">
    <server id="server-01" address="127.0.0.1" port="6801">
        <http address="192.168.1.10" port="8081" />
        <jvm-arg>-Djava.rmi.server.hostname=192.168.1.10</jvm-arg>
        <jvm-arg>-Dcom.sun.management.jmxremote.port=9081</jvm-arg>
        <jvm-arg>-Dcom.sun.management.jmxremote.password.file=/opt/conf/jmxremote/jmxremote.password</jvm-arg>
    </server>

#####3. 命令行配置

JMXREMOTE=" -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Djava.rmi.server.hostname=192.168.1.10 -Dcom.sun.management.jmxremote.port=9081 "
java ${JMXREMOTE} Main

参考资料