Cacti监控Tomcat服务器实现过程

1首先去官网上面下载通用的监控模板

一般使用TomcatStats-0.1.zip模板居多,下载地址:

http://forums.cacti.net/download/file.php?id=12310,

在linux服务器上面使用wget下载,wgethttp://forums.cacti.net/download/file.php?id=12310,报如下错误:

正在连接forums.cacti.net|173.225.179.10|:80...已连接。

已发出HTTP请求,正在等待回应... 301 Moved Permanently

位置:http://forums.cacti.net/ [跟随至新的URL]

已超过20次重定向。

可以在windows7的google浏览器上输入http://forums.cacti.net/download/file.php?id=12310点击回车下载,然后通过SecureFX客户端工具scp到linux服务器上即可。

然后解压缩得到3个文件cacti_host_template_tomcat_server.xml,INSTALL.txt,tomcatstats.pl 3个文件。

2在cacti主服务器的网址上面导入模板

打开cacti服务器的网址:

进入http://10.xx.1.xx/cacti/index.php->Console–>Templates->Import Templates,选择文件导入(cacti_host_template_tomcat_server.xml)文件,选择Import按钮加载tomcat模板。

3 cacti服务器端加载tomcatstats.pl统计脚本

将解压缩TomcatStats-0.1.zip得到的tomcatstats.pl放到/var/www/html/cacti/scritps目录下,并且赋予执行权限

Chown –R apache.apache tomcatstats.pl

chmod 755 tomcatstats.pl

修改tomcatstats.pl,大概第20行,将

1. my $xml = `GET $url`;

修改为

1. my $xml = `wget -qO - $url`;

不然在你导入之后很可能出现数据出不来。

Check URL连接是否正确

Vim tomcatstats.pl后,在第17行后面添加print $url,在控制台打出url,如下所示:

my $url = "http://$username:$password"."\@$host/manager/status?XML=true";

print $url;

print “ ”;

然后用perl来check下统计脚本,如下:

[root@squid-2 scripts]# perl tomcatstats.pl 10.xx.3.xx:9444 'tomcat' '9ssspw ' http-9444

http://tomcat:[email protected]:9444/manager/status?XML=true jvm_memory_free:2925944104 jvm_memory_max:3892314112 jvm_memory_total:3892314112 connector_max_time:131 connector_error_count:4464 connector_bytes_sent:19559190 connector_processing_time:11552 connector_request_count:8931 connector_bytes_received:0 connector_current_thread_count:4 connector_min_spare_threads: connector_max_threads:150 connector_max_spare_threads: connector_current_threads_busy:1


也可以在windows7的google浏览器里面,输入上面URL,也会出现很多tomcat的统计信息,如下所示:


4修改cacti中tomcat获取数据的url地址

进入cacti---> console ---> Data Input Methods --->Tomcat Status

修改Input String中字段

修改为:perl /scripts/tomcatstats.pl :8080 tomcat 9ssspw http-8080

注意:替换上面的username和password为实际的tomcat管理员账号和密码。

要开启tomcat的manager管理员账号 附件内有Enable the Tomcat manager application介绍,如下图:


5 web端tomcat服务器的配置调整

在tomcat/conf/server.xml里面添加如下:

maxThreads="150" minSpareThreads="25" maxSpareThreads="75"

enableLookups="false" disableUploadTimeout="true"

acceptCount="100" scheme="https" secure="true"

clientAuth="false" sslProtocol="TLS" />

resourceName="UserDatabase"/>

unpackWARs="false" autoDeploy="false"

xmlValidation="false" xmlNamespaceAware="false">

directory="logs" prefix="admin_access_log." suffix=".txt"

pattern="combined" resolveHosts="false"

fileDateFormat="yyy-MM-dd"/>

docBase="server/webapps/manager" debug="0"

privileged="true" reloadable="false" />

然后在tomcat/conf/tomcat-users.xml里面 添加

passwords 为连接密码 可自行更改,然后重启tomcat 服务

去cacti服务器端执行perl tomcatstats.pl 10.xx.3.xx:9444 'tomcat' '9ssspw ' http-9444 check统计脚本是否能取到tomcat的数据,有数据即正常,如下所示:

[root@squid-2 scripts]# /usr/bin/perl tomcatstats.pl 10.xx.3.xx:9444 'tomcat' 'xxx’ http-9444

http://tomcat:[email protected]:9444/manager/status?XML=true jvm_memory_free:3409129096 jvm_memory_max:3892314112 jvm_memory_total:3892314112 connector_max_time:131 connector_error_count:2 connector_bytes_sent:20241 connector_processing_time:168 connector_request_count:5 connector_bytes_received:0 connector_current_thread_count:4 connector_min_spare_threads: connector_max_threads:150 connector_max_spare_threads: connector_current_threads_busy:1

[root@squid-2 scripts]#

记录debug期间的报错信息如下:

[root@squid-2 scripts]# perl tomcatstats.pl 10.xx.3.xx:9300 admin 9ssspw http-9300

Can't locate XML/Simple.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at tomcatstats.pl line 7.

BEGIN failed--compilation aborted at tomcatstats.pl line 7.

需要安装XML::Simple

[root@squid-2 ~]# find / -name cpan

/usr/bin/cpan

[root@squid-2 ~]# /usr/bin/cpan XML::Simple

……

Prepending /root/.cpan/build/XML-Simple-2.20-7zpaOY/blib/arch /root/.cpan/build/XML-Simple-2.20-7zpaOY/blib/lib to PERL5LIB for 'install'

Installing /usr/local/share/perl5/XML/Simple.pm

Installing /usr/local/share/perl5/XML/Simple/FAQ.pod

Installing /usr/local/share/man/man3/XML::Simple.3pm

Installing /usr/local/share/man/man3/XML::Simple::FAQ.3pm

Appending installation info to /usr/lib64/perl5/perllocal.pod

GRANTM/XML-Simple-2.20.tar.gz

/usr/bin/make install -- OK

Warning (usually harmless): 'YAML' not installed, will not store persistent state

继续报错File does not exist: at tomcatstats.pl line 20

[root@squid-2 scripts]# /usr/bin/perl tomcatstats.pl 10.254.3.29:9300 tomcat xxx http-9300

File does not exist: at tomcatstats.pl line 20

需要安装如下组件:

[root@squid-2 scripts]#yum install perl-HTML-Parser.i386 perl-HTML-Tagset.noarch perl-libwww-perl.noarch perl-URI.noarch

之后启动tomcat报错如下:

[tomcat@web-9 logs]$ cat catalina.out

2014-6-6 15:11:15 org.apache.catalina.core.AprLifecycleListener init

信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/jdk1.6.0_45/jre/lib/amd64/server:/usr/java/jdk1.6.0_45/jre/lib/amd64:/usr/java/jdk1.6.0_45/jre/../lib/amd64:/usr/local/lib::/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib

2014-6-6 15:11:16 org.apache.tomcat.util.digester.SetPropertiesRule begin

警告: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'debug' to '0' did not find a matching property.

跟踪后发现是连接池的配置问题:

把debug="0"去除即可。

分析:tomcat的6.0.37这个版本中可能用别的属性替代了debug功能。

6 Cacti监控tomcat的选项

Graph templates,总共就4个选项,如下:


点击监控项连接进去,看到RRDTool Says: ERROR: invalid y-grid format报错信息,

解决办法是:

进右上角的连接*Edit Graph Template-->Tomcat-Connection Rate-->Unit Grid Value (--unit/--y-grid),默认的值为1,去掉改成为0即可。

同理解决Tomcat - Heap Statistics不出图的问题 将1048576值改空即可。

之后如果10分钟内还是出不了图,那么可以继续等待,tomcat监控模板出图时间比较漫长,我这里等待了3个小时候后,图出来了,如下所示:

1)Tomcat - Connection Rate:连接效率



2)Tomcat - Heap Statistics:JVM堆得使用情况


3)Tomcat - Thread Statistics:线程状态


4)Tomcat – Throughput:Tomcat吞吐量


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