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,wget http://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 <path_cacti>/scripts/tomcatstats.pl <hostname>: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:
<Service name="Admin">
<Connector port="9444" maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" disableUploadTimeout="true"
acceptCount="100" scheme="https" secure="true"
clientAuth="false" sslProtocol="TLS" />
<Engine name="Admin" defaultHost="localhost">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
<Host name="localhost" appBase="webapps"
unpackWARs="false" autoDeploy="false"
xmlValidation="false" xmlNamespaceAware="false">
<Valve className="org.apache.catalina.valves.FastCommonAccessLogValve"
directory="logs" prefix="admin_access_log." suffix=".txt"
pattern="combined" resolveHosts="false"
fileDateFormat="yyy-MM-dd"/>
<Context path="/manager" cookies="false"
docBase="server/webapps/manager" debug="0"
privileged="true" reloadable="false" />
</Host>
</Engine>
</Service>
然后在tomcat/conf/tomcat-users.xml里面 添加
<role rolename="manager-gui"/>
<user username="tomcat" password="9ssspw " roles="manager-gui"/>
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:
<Context path="/n" docBase="server/webapps/manager " debug="0" reloadable="true" crossContext="false">
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