Nginx下搭建Nagios监控平台

作者

本文基于《LNMP最新源码安装脚本》,Nagios依赖PHP环境和perl环境，由于Nginx不支持Perl的CGI，需先来搭建Perl环境，Nagios原理介绍略。

1、下载最新稳定源码包和Perl脚本

  1. mkdir nagios-cacti
  2. cd nagios-cacti
  3. wget http://www.cpan.org/modules/by-module/FCGI/FCGI-0.74.tar.gz
  4. wget http://www.cpan.org/authors/id/B/BO/BOBTFISH/FCGI-ProcManager-0.24.tar.gz
  5. wget //linuxeye.com/wp-content/uploads/2013/04/perl-fcgi.pl
  6. wget http://jaist.dl.sourceforge.net/project/nagios/nagios-3.x/nagios-3.5.0/nagios-3.5.0.tar.gz
  7. wget http://nchc.dl.sourceforge.net/project/nagiosplug/nagiosplug/1.4.16/nagios-plugins-1.4.16.tar.gz
  8. wget http://nchc.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.14/nrpe-2.14.tar.gz

2、Nginx对Perl的CGI支持

Nginx支持Perl的CGI方法有好几种，基本原理都是通过Perl的FCGI模块实现，下面的方法就是其中一种：

安装FCGI模块

  1. tar xzf FCGI-0.74.tar.gz
  2. cd FCGI-0.74
  3. perl Makefile.PL
  4. make && make install
  5. cd ../

安装FCGI-ProcManager模块

  1. tar xzf FCGI-ProcManager-0.24.tar.gz
  2. cd FCGI-ProcManager-0.24
  3. perl Makefile.PL
  4. make && make install
  5. cd ../

Perl脚本

  1. cp perl-fcgi.pl /usr/local/nginx
  2. chmod +x /usr/local/nginx/perl-fcgi.pl
  3. /usr/local/nginx/perl-fcgi.pl > /usr/local/nginx/logs/perl-fcgi.log 2>&1 & #启动Perl
  4. chmod 777 /usr/local/nginx/logs/perl-fcgi.sock #Nginx Log中提示Permision Denied方法
  5. cd ../

3、Nagios安装(服务端)

  1. useradd -s /sbin/nologin nagios
  2. groupadd nagcmd
  3. usermod -a -G nagcmd nagios
  4. usermod -a -G nagcmd www
  5. tar xzf nagios-3.5.0.tar.gz
  6. cd nagios
  7. yum -y install gd-devel
  8. ./configure –prefix=/usr/local/nagios –with-command-group=nagcmd
  9. make all
  10. make install #用于安装主要的程序、CGI及HTML文件
  11. make install-init #用于生成init启动脚本
  12. make install-config #用于安装示例配置文件
  13. make install-commandmode #用于设置相应的目录权限
  14. chkconfig –add nagios
  15. chkconfig nagios on
  16. cd ../

Nagios主程序只是提供一个运行框架，其具体监控是靠运行在其下的插件完成的，Nagios插件必须安装

  1. tar xzf nagios-plugins-1.4.16.tar.gz
  2. cd nagios-plugins-1.4.16
  3. ./configure –prefix=/usr/local/nagios –with-nagios-user=nagios –with-nagios-group=nagios
  4. make && make install
  5. cd ../

由于Nagios只能监测自己所在的主机的一些本地情况,例如，cpu负载、内存使用、硬盘使用等等。如果想要监测被监控的服务器上的这些本地情况，就要用到NRPE。NRPE(Nagios Remote Plugin Executor)是Nagios的一个扩展，它被用于被监控的服务器上，向Nagios监控平台提供该服务器的一些本地的情况。NRPE可以称为Nagios的Linux客户端。

  1. tar xzf nrpe-2.14.tar.gz
  2. cd nrpe-2.14
  3. ./configure
  4. make && make install
  5. cp sample-config/nrpe.cfg /usr/local/nagios/etc/
  6. chown nagios.nagios /usr/local/nagios/etc/nrpe.cfg
  7. cd ../

4、Nginx配置（服务端）

  1. ln -s /usr/local/nagios/share /data/admin/nagios

以http://www.linuxeye.com/nagios，需要建立软链接，服务nginx.conf配置文件如下：

  1. ################http://www.linuxeye.com/nagios#########################
  2.         server {
  3.         listen  80;
  4.         server_name    _;
  5.         access_log     /dev/null;
  6.         root /data/admin;
  7.         index index.php;
  8.         location ~ .*\.(php|php5)?$  {
  9.                 fastcgi_pass  127.0.0.1:9000;
  10.                 fastcgi_index index.php;
  11.                 include fastcgi.conf;
  12.                 }
  13.         location ~ .*\.(htm|html|gif|jpg|jpeg|png|bmp|swf|ioc|rar|zip|txt|flv|mid|doc|ppt|pdf|xls|mp3|wma)$ {
  14.                 expires      30d;
  15.                 }
  16.         location ~ .*\.(js|css)?$ {
  17.                 expires      1h;
  18.                 }
  19.         location /status {
  20.                 stub_status on;
  21.                 }
  22.         location ~ .*\.(cgi|pl)?$ {
  23.                 auth_basic “Nagios Access”;
  24.                 auth_basic_user_file /usr/local/nagios/etc/htpasswd.users;
  25.                 gzip off;
  26.                 root   /usr/local/nagios/sbin;
  27.                 rewrite ^/nagios/cgi-bin/(.*)\.cgi /$1.cgi break;
  28.                 fastcgi_pass  unix:/usr/local/nginx/logs/perl-fcgi.sock;
  29.                 fastcgi_param SCRIPT_FILENAME /usr/local/nagios/sbin$fastcgi_script_name;
  30.                 fastcgi_index index.cgi;
  31.                 fastcgi_param  REMOTE_USER        $remote_user;
  32.                 fastcgi_param HTTP_ACCEPT_LANGUAGE en_US;
  33.                 include fastcgi_params;
  34.                 fastcgi_read_timeout   60;
  35.                 }
  36.         }

以http://nagios.linuxeye.com服务nginx.conf配置文件如下：

  1. ################http://nagios.linuxeye.com##############################
  2.         server {
  3.         listen  80;
  4.         server_name     nagios.linuxeye.com;
  5.         access_log      logs/nagios_access.log combined;
  6.         auth_basic “Nagios Access”;
  7.         auth_basic_user_file /usr/local/nagios/etc/htpasswd.users;
  8.         location / {
  9.         root   /usr/local/nagios/share;
  10.         index  index.html index.htm index.php;
  11.                 }
  12.         location ~ .*\.(php|php5)?$ {
  13.         root /usr/local/nagios/share;
  14.         fastcgi_pass  127.0.0.1:9000;
  15.         fastcgi_index index.php;
  16.         include fastcgi.conf;
  17.                 }
  18.         location /nagios {
  19.             alias /usr/local/nagios/share;
  20.                 }
  21.         location /cgi-bin/images {
  22.             alias /usr/local/nagios/share/images;
  23.                 }
  24.         location /cgi-bin/stylesheets {
  25.             alias /usr/local/nagios/share/stylesheets;
  26.                 }
  27.         location /cgi-bin {
  28.             alias /usr/local/nagios/sbin;
  29.                 }
  30.         location ~ .*\.(cgi|pl)?$ {
  31.         gzip off;
  32.         root   /usr/local/nagios/sbin;
  33.         rewrite ^/nagios/cgi-bin/(.*)\.cgi /$1.cgi break;
  34.         fastcgi_pass  unix:/usr/local/nginx/logs/nginx-fcgi.sock;
  35.         fastcgi_param SCRIPT_FILENAME /usr/local/nagios/sbin$fastcgi_script_name;
  36.         fastcgi_index index.cgi;
  37.         fastcgi_param  REMOTE_USER        $remote_user;
  38.         fastcgi_param HTTP_ACCEPT_LANGUAGE en_US;
  39.         include fastcgi_params;
  40.         fastcgi_read_timeout   60;
  41.                 }
  42.         }

#创建web验证用户

在有安装apache服务器用htpasswd或者在线生成

  1. /usr/local/apache/bin/htpasswd -nb admin 123456 > /usr/local/nagios/etc/htpasswd.users
  2. chown nagios.nagios /usr/local/nagios/etc/htpasswd.users

5、服务端配置文件修改

NRPE

  1. sed -i ‘s@allowed_hosts=.*$@allowed_hosts=127.0.0.1,192.168.1.114@g’ /usr/local/nagios/etc/nrpe.cfg
  2. sed -i ‘s@command[check_hda1]@#command[check_hda1]@g’ /usr/local/nagios/etc/nrpe.cfg
  3. sed -i ‘223a command[check_df]=/usr/local/nagios/libexec/check_disk -w 20 -c 10’ /usr/local/nagios/etc/nrpe.cfg
  4. sed -i ‘224a command[check_cpu_procs]=/usr/local/nagios/libexec/check_procs -w 50 -c 90 –metric=CPU‘ /usr/local/nagios/etc/nrpe.cfg
  5. sed -i ‘225a command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 5%’ /usr/local/nagios/etc/nrpe.cfg
  6. echo ‘/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d’ >> /etc/rc.local
  7. /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d #启动nrpe

#修改配置文件归类

  1. sed -i ‘s@cfg_file=/usr/local/nagios/etc/objects/templates.cfg@#cfg_file=/usr/local/nagios/etc/objects/templates.cfg@g’ /usr/local/nagios/etc/nagios.cfg
  2. sed -i ‘s@cfg_file=/usr/local/nagios/etc/objects/localhost.cfg@#cfg_file=/usr/local/nagios/etc/objects/localhost.cfg@g’ /usr/local/nagios/etc/nagios.cfg
  3. sed -i ’32a cfg_file=/usr/local/nagios/etc/objects/hosts.cfg’ /usr/local/nagios/etc/nagios.cfg
  4. sed -i ’33a cfg_file=/usr/local/nagios/etc/objects/hostgroups.cfg’ /usr/local/nagios/etc/nagios.cfg
  5. sed -i ’34a cfg_file=/usr/local/nagios/etc/objects/contactsgroups.cfg’ /usr/local/nagios/etc/nagios.cfg
  6. sed -i ’35a cfg_file=/usr/local/nagios/etc/objects/services.cfg’ /usr/local/nagios/etc/nagios.cfg

#命令检查时间间隔

  1. sed -i ‘s@^command_check_interval.*$@command_check_interval=10s@g’ /usr/local/nagios/etc/nagios.cfg

#指定用户admin可以通过浏览器操纵nagios服务的关闭、重启等各种操作

  1. sed -i ‘s@authorized_for_system_information=.*$@authorized_for_system_information=admin@g’ /usr/local/nagios/etc/cgi.cfg
  2. sed -i ‘s@authorized_for_configuration_information=.*$@authorized_for_configuration_information=admin@g’ /usr/local/nagios/etc/cgi.cfg
  3. sed -i ‘s@authorized_for_system_commands=.*$@authorized_for_system_commands=admin@g’ /usr/local/nagios/etc/cgi.cfg
  4. sed -i ‘s@authorized_for_all_services=.*$@authorized_for_all_services=admin@g’ /usr/local/nagios/etc/cgi.cfg
  5. sed -i ‘s@authorized_for_all_hosts=.*$@authorized_for_all_hosts=admin@g’ /usr/local/nagios/etc/cgi.cfg
  6. sed -i ‘s@authorized_for_all_service_commands=.*$@authorized_for_all_service_commands=admin@g’ /usr/local/nagios/etc/cgi.cfg
  7. sed -i ‘s@authorized_for_all_host_commands=.*$@authorized_for_all_host_commands=admin@g’ /usr/local/nagios/etc/cgi.cfg

#hosts.cfg

  1. cat > /usr/local/nagios/etc/objects/hosts.cfg << EOF
  2. define host {
  3. host_name                 linux4
  4. alias                     nagios-server
  5. address                   192.168.1.114
  6. contact_groups            sagroup
  7. check_command             check-host-alive
  8. max_check_attempts          10
  9. notification_interval       5
  10. notification_period         24×7
  11. notification_options        d,u,r
  12. }
  13. define host {
  14. host_name                 linux3
  15. alias                     192.168.1.113
  16. address                   192.168.1.113
  17. contact_groups            sagroup
  18. check_command             check-host-alive
  19. max_check_attempts          10
  20. notification_interval       5
  21. notification_period         24×7
  22. notification_options        d,u,r
  23. }
  24. EOF
  25. chown nagios.nagios /usr/local/nagios/etc/objects/hosts.cfg
  26. chmod 664 /usr/local/nagios/etc/objects/hosts.cfg

#hostgroups.cfg

  1. cat > /usr/local/nagios/etc/objects/hostgroups.cfg << EOF
  2. define hostgroup {
  3. hostgroup_name  sa-servers
  4. alias           sa servers
  5. members         linux4,linux3
  6. }
  7. EOF
  8. chown nagios.nagios /usr/local/nagios/etc/objects/hostgroups.cfg
  9. chmod 664 /usr/local/nagios/etc/objects/hostgroups.cfg

#contacts.cfg

  1. cp /usr/local/nagios/etc/objects/contacts.cfg /usr/local/nagios/etc/objects/contacts.cfg.bk
  2. cat > /usr/local/nagios/etc/objects/contacts.cfg << EOF
  3. define contact {
  4. contact_name    admin
  5. alias           system administrator
  6. service_notification_period    24×7
  7. host_notification_period       24×7
  8. service_notification_options   w,u,c,r
  9. host_notification_options       d,u,r
  10. host_notification_commands     notify-host-by-email
  11. service_notification_commands  notify-service-by-email
  12. email                          [email protected]
  13. }
  14. EOF

#services.cfg

  1. cat > /usr/local/nagios/etc/objects/services.cfg << EOF
  2. define service {
  3. host_name               linux4,linux3
  4. service_description     check-host-alive
  5. check_command           check-host-alive
  6. check_period            24×7
  7. max_check_attempts      4
  8. normal_check_interval   3
  9. retry_check_interval    2
  10. contact_groups          sagroup
  11. notification_interval   10
  12. notification_period     24×7
  13. notification_options    w,u,c,r
  14. }
  15. define service {
  16. host_name               linux4,linux3
  17. service_description     check_http
  18. check_command           check_http
  19. check_period            24×7
  20. max_check_attempts      4
  21. normal_check_interval   3
  22. retry_check_interval    2
  23. contact_groups          sagroup
  24. notification_interval   10
  25. notification_period     24×7
  26. notification_options    w,u,c,r
  27. }
  28. define service{
  29. host_name               linux4,linux3
  30. service_description     check_ssh
  31. check_command           check_ssh
  32. max_check_attempts      4
  33. normal_check_interval   3
  34. retry_check_interval    2
  35. check_period            24×7
  36. notification_interval   10
  37. notification_period     24×7
  38. notification_options    w,u,c,r
  39. contact_groups          sagroup
  40. }
  41. define service{
  42. host_name               linux4,linux3
  43. service_description     check-disk
  44. check_command           check_nrpe!check_df
  45. max_check_attempts      4
  46. normal_check_interval   3
  47. retry_check_interval    2
  48. check_period            24×7
  49. notification_interval   10
  50. notification_period     24×7
  51. notification_options    w,u,c,r
  52. contact_groups          sagroup
  53. }
  54. define service{
  55. host_name               linux4,linux3
  56. service_description     check_cpu_procs
  57. check_command           check_nrpe!check_cpu_procs
  58. max_check_attempts      4
  59. normal_check_interval   3
  60. retry_check_interval    2
  61. check_period            24×7
  62. notification_interval   10
  63. notification_period     24×7
  64. notification_options    w,u,c,r
  65. contact_groups          sagroup
  66. }
  67. define service{
  68. host_name               linux4,linux3
  69. service_description     check_load
  70. check_command           check_nrpe!check_load
  71. max_check_attempts      4
  72. normal_check_interval   3
  73. retry_check_interval    2
  74. check_period            24×7
  75. notification_interval   10
  76. notification_period     24×7
  77. notification_options    w,u,c,r
  78. contact_groups          sagroup
  79. }
  80. define service{
  81. host_name               linux4,linux3
  82. service_description     check_users
  83. check_command           check_nrpe!check_users
  84. max_check_attempts      4
  85. normal_check_interval   3
  86. retry_check_interval    2
  87. check_period            24×7
  88. notification_interval   10
  89. notification_period     24×7
  90. notification_options    w,u,c,r
  91. contact_groups          sagroup
  92. }
  93. define service{
  94. host_name               linux4,linux3
  95. service_description     check_swap
  96. check_command           check_nrpe!check_swap
  97. max_check_attempts      4
  98. normal_check_interval   3
  99. retry_check_interval    2
  100. check_period            24×7
  101. notification_interval   10
  102. notification_period     24×7
  103. notification_options    w,u,c,r
  104. contact_groups          sagroup
  105. }
  106. define service{
  107. host_name               linux4,linux3
  108. service_description     check_zombie_procs
  109. check_command           check_nrpe!check_zombie_procs
  110. max_check_attempts      4
  111. normal_check_interval   3
  112. retry_check_interval    2
  113. check_period            24×7
  114. notification_interval   10
  115. notification_period     24×7
  116. notification_options    w,u,c,r
  117. contact_groups          sagroup
  118. }
  119. EOF
  121. chown nagios.nagios /usr/local/nagios/etc/objects/services.cfg
  122. chmod 664 /usr/local/nagios/etc/objects/services.cfg

#commands.cfg

  1. echo ‘define command{
  2. command_name check_nrpe
  3. command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
  4. }’ >> /usr/local/nagios/etc/objects/commands.cfg

#contactsgroups.cfg

  1. cat > /usr/local/nagios/etc/objects/contactsgroups.cfg << EOF
  2. define contactgroup {
  3. contactgroup_name    sagroup
  4. alias                system administrator group
  5. members              admin
  6. }
  7. EOF
  8. chown nagios.nagios /usr/local/nagios/etc/objects/contactsgroups.cfg
  9. chmod 664 /usr/local/nagios/etc/objects/contactsgroups.cfg
  11. /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg #检查配置是否有错误
  12. service nagios start

6、被监控端（客户端）

  1. mkdir nagios  
  2. cd nagios  
  3. wget http://nchc.dl.sourceforge.net/project/nagiosplug/nagiosplug/1.4.16/nagios-plugins-1.4.16.tar.gz  
  4. wget http://nchc.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.14/nrpe-2.14.tar.gz  
  5.   
  6. useradd -M -s /sbin/nologin nagios  
  7. tar xzf nagios-plugins-1.4.16.tar.gz  
  8. cd nagios-plugins-1.4.16  
  9. ./configure –prefix=/usr/local/nagios –with-nagios-user=nagios –with-nagios-group=nagios  
  10. make && make install  
  11. cd ../  
  12.   
  13. tar xzf nrpe-2.14.tar.gz  
  14. cd nrpe-2.14  
  15. ./configure  
  16. make && make install  
  17. mkdir /usr/local/nagios/etc  
  18. cp sample-config/nrpe.cfg  /usr/local/nagios/etc/  
  19. cd ../  
  20.   
  21. sed -i ‘s@allowed_hosts=.*$@allowed_hosts=192.168.1.114@g’ /usr/local/nagios/etc/nrpe.cfg  
  22. sed -i ‘s@command[check_hda1]=@#command[check_hda1]=@’ /usr/local/nagios/etc/nrpe.cfg  
  23. sed -i ‘224a command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20 -c 10’ /usr/local/nagios/etc/nrpe.cfg  
  24. sed -i ‘225a command[check_cpu_procs]=/usr/local/nagios/libexec/check_procs -w 50 -c 90 –metric=CPU‘ /usr/local/nagios/etc/nrpe.cfg  
  25. sed -i ‘226a command[check_swap]=/usr/local/nagios/libexec/check_swap -w 20% -c 5%’ /usr/local/nagios/etc/nrpe.cfg  
  26. echo ‘/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d’ >> /etc/rc.local  
  27. /usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d  
  28. iptables -A INPUT -p tcp -s 192.168.1.114 -m state –state NEW -m tcp –dport 5666 -j ACCEPT  

Tue Apr 16 21:10:51 CST 2013


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