监控Tomcat状态及配置AIO（APR）模式

方法一：开发java监控页面

mkdir /usr/local/tomcat8/webapps/memtest/

vim /usr/local/tomcat8/webapps/memtest/meminfo.jsp

<%
Runtime rtm = Runtime.getRuntime();
long mm = rtm.maxMemory()/1024/1024;
long tm = rtm.totalMemory()/1024/1024;
long tm = rtm.freeMemory()/1024/1024;

out.println("JVM memory detail info:<br>");
out.println("MAX memory:"+mm+"MB"+"<br>");
out.println("Total memory:"+tm+"MB"+"<br>");
out.println("Free memory:"+fm+"MB"+"<br>");
out.println("Avaliable memory can be userd is:"+(mm+fm-tm+"MB"+"<br>");
%>

[root@localhost ~]# /usr/local/tomcat8/bin/shutdown.sh

[root@localhost ~]# /usr/local/tomcat8/bin/startup.sh

方法二：使用ins命令进行监控

需要安装jdk （java）

jps  -lvm   （不常用）

方法三Tomcat远程监控功能（常用）

vim /usr/local/tomcat8/bin/catalina.sh

#!/bin/sh
CATALINA_OPTS="-Djava.library.path=/usr/local/apr/lib"
CATALINA_OPTS="$CATALINA_OPTS
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=12345     #远程端口号12345
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Djava.rmi.server.hostname=192.168.200.112"   #本机IP

添加上面这几行代码

/usr/local/tomcat8/bin/shutdown.sh

/usr/local/tomcat8/bin/startup.sh

在物理机java/bin里上打开

 

 

 二。修改成APR模式

rpm -e apr --nodeps    #软件版本不一样

yum -y install apr apr-devel

[root@localhost ~]# cp /usr/local/tomcat8/bin/tomcat-native.tar.gz ./

[root@localhost ~]# tar xf tomcat-native.tar.gz

cd tomcat-native-1.2.21-src/native/

./configure --with-apr=/usr/bin/apr-1-config --with-java-home=/usr/local/java && make &&make install

vim /usr/local/tomcat8/bin/catalina.sh

CATALINA_OPTS="-Djava.library.path=/usr/local/apr/lib"
CATALINA_OPTS="$CATALINA_OPTS
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port=12345
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Djava.rmi.server.hostname=192.168.200.112"  

vim /etc/profile

添加：

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/apr/lib

 source /etc/profile

vim /usr/local/tomcat8/conf/server.xml

在    69行 protocol后添加以下内容

 protocol="org.apache.coyote.http11.Http11AprProtocol"

/usr/local/tomcat8/bin/shutdown.sh 

/usr/local/tomcat8/bin/startup.sh 

[root@localhost ~]# tail /usr/local/tomcat8/logs/catalina.out

 成功

解决重启tomcat服务后，8005端口延迟启动的问题

117      securerandom.source=file:/dev/urandom

把random  改成urandom