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howtos:software:install_nagios_on_slackware [2015/08/01 12:01 (UTC)] – Saving so I won't lose ALOT of work already. arfonhowtos:software:install_nagios_on_slackware [2015/11/27 11:35 (UTC)] – [Install Nagios On Slackware] jamesaxl
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   - Create the nagios group and user: <code>   - Create the nagios group and user: <code>
-# groupadd -g 213 nagios +     groupadd -g 213 nagios 
-# useradd -u 213 -d /dev/null -s /bin/false -g nagios nagios+     useradd -u 213 -d /dev/null -s /bin/false -g nagios nagios
 </code> </code>
   - Add the 'apache' user to the 'nagios' group, so that it can write to the ''/var/nagios/rw'' directory ('a' option prevents the user to be removed from other groups, the member of which he is already): <code>   - Add the 'apache' user to the 'nagios' group, so that it can write to the ''/var/nagios/rw'' directory ('a' option prevents the user to be removed from other groups, the member of which he is already): <code>
-# usermod -aG nagios apache+     usermod -aG nagios apache
 </code> </code>
   - Install the Nagios::Plugin Perl module: <code>   - Install the Nagios::Plugin Perl module: <code>
-     cpan -i Nagios::Plugin+     cpan -i Monitoring::Plugin
 </code> </code>
   - Use [[http://sbopkg.org/|sbopkg]] or install the individual packages using scripts from [[http://slackbuilds.org/|SlackBuilds.org]], and install the following in this order:   - Use [[http://sbopkg.org/|sbopkg]] or install the individual packages using scripts from [[http://slackbuilds.org/|SlackBuilds.org]], and install the following in this order:
     * RRDTool     * RRDTool
-    * nagios (currently, the package which can be built using a [[http://slackbuilds.org/network/nagios/ | SlackBuilds.org script]] is nagios-3.3.1)+    * nagios (currently, the package which can be built using a [[http://slackbuilds.org/network/nagios/ | SlackBuilds.org script]] is nagios-4.0.8)
     * nagios-plugin package     * nagios-plugin package
     * nagios-graphing     * nagios-graphing
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 </code> </code>
   - Edit ''/etc/httpd/http.conf'' <code>   - Edit ''/etc/httpd/http.conf'' <code>
 +COMMENT:
 +      LoadModule mpm_event_module lib64/httpd/modules/mod_mpm_event.so
 +UNCOMMENT:
 +     #LoadModule mpm_prefork_module lib64/httpd/modules/mod_mpm_prefork.so
 UNCOMMENT: UNCOMMENT:
      #LoadModule cgi_module lib64/httpd/modules/mod_cgi.so      #LoadModule cgi_module lib64/httpd/modules/mod_cgi.so
            
-     (or #LoadModule cgi_module lib/httpd/modules/mod_cgi.so which ever applies)+     (or #LoadModule cgi_module lib/httpd/modules/mod_cgi.so on 32bit installs)
            
 CHANGE: CHANGE:
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 </code> </code>
   - Make sure apache starts at boot and start/restart apache: <code>   - Make sure apache starts at boot and start/restart apache: <code>
-# chmod 755 /etc/rc.d/rc.httpd +     chmod 755 /etc/rc.d/rc.httpd 
-# /etc/rc.d/rc.httpd restart+     /etc/rc.d/rc.httpd restart
 </code> </code>
   - Set the password for //nagiosadmin// : <code>   - Set the password for //nagiosadmin// : <code>
-# htpasswd -c /etc/nagios/htpasswd.users nagiosadmin+     htpasswd -c /etc/nagios/htpasswd.users nagiosadmin
 </code> </code>
   - (Not sure if this is necessary but, leaving it in until I can test) \\ Make sure nagios starts at boot and start/restart nagios:   - (Not sure if this is necessary but, leaving it in until I can test) \\ Make sure nagios starts at boot and start/restart nagios:
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   - Run the ''htpasswd'' command for each user: <code>   - Run the ''htpasswd'' command for each user: <code>
-# htpasswd -c /etc/nagios/htpasswd.users bob +     htpasswd -c /etc/nagios/htpasswd.users bob 
-# htpasswd -c /etc/nagios/htpasswd.users sue+     htpasswd -c /etc/nagios/htpasswd.users sue
 </code> </code>
   - Edit ''/etc/nagios/cgi.cfg'' and add the user(s) too: <code>   - Edit ''/etc/nagios/cgi.cfg'' and add the user(s) too: <code>
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 ====== TROUBLESHOOTING ====== ====== TROUBLESHOOTING ======
 ERROR: When browsing to the nagios webpage (as nagiosadmin) you get "You do not have permission" ERROR: When browsing to the nagios webpage (as nagiosadmin) you get "You do not have permission"
 +
 HINT: Check /var/log/httpd/error_log to see what is failing. HINT: Check /var/log/httpd/error_log to see what is failing.
  
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 FIX2: In /etc/http/httpd.conf make sure: FIX2: In /etc/http/httpd.conf make sure:
     UNCOMMENT: Include /etc/httpd/mod_php.conf     UNCOMMENT: Include /etc/httpd/mod_php.conf
-    DO THE "<IfModule dir_module>" CHANGE LISTED ABOVE+    Do the "<IfModule dir_module>" change listed above.
          
 +-----
  
 +ERROR: When clicking on Nagios cgi pages, they are downloaded and not executed.
 +
 +FIX: Make sure the "LoadModule cgi_module" is uncommented as described above.
 +
 +-----
  
 ERROR: "stderr: execvp(/usr/libexec/monitoring-plugins/check_ping, ...) failed. errno is 2: No such file or directory" ERROR: "stderr: execvp(/usr/libexec/monitoring-plugins/check_ping, ...) failed. errno is 2: No such file or directory"
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      CHANGE: $USER1$=/usr/libexec/monitoring-plugins      CHANGE: $USER1$=/usr/libexec/monitoring-plugins
      TO: $USER1$=/usr/libexec/nagios      TO: $USER1$=/usr/libexec/nagios
 +
 +-----
 +
 +ERROR: I've done the FIXes above and it's still not working...
 +
 +FIX: Didya restart httpd and/or nagios?
 +     /etc/rc.d/rc.httpd restart
 +     /etc/rc.d/rc.nagios restart
 +
 +
 +
 +
 +====== Install NRPE On A Target Machine ======
 +
 +**ON THE TARGET MACHINE (as root):**
 +
 +  groupadd -g 213 nagios
 +  useradd -u 213 -d /dev/null -s /bin/false -g nagios nagios
 +
 +Install nagios via SBo (Required by Nagios-plugins)
 +
 +Install nagios-plugins via SBo (Required by NRPE)
 +
 +Install nrpe via SBo
 +
 +Ignore the xinetd stuff, you have to run NRPE as a daemon on Slackware (unless you want to go through the headache of replacing inetd with xinetd)
 +
 +So, start NRPE in Daemon mode:
 +  chmod 755 /etc/rc.d/rc.nrpe
 +  /etc/rc.d/rc.nrpe start
 +
 +Test NRPE
 +  /usr/libexec/nagios/check_nrpe -H localhost
 +  NRPE v2.15
 +  
 +  /usr/libexec/nagios/check_nrpe -H localhost -c check_users
 +  USERS OK - 1 users currently logged in |users=1;5;10;0
 +
 +Add your Nagios server's IP into the allowed_hosts list:
 +  vi /etc/nagios/nrpe.cfg
 +   allowed_hosts=127.0.0.1,192.168.1.77  (WHERE: 192.168.1.77 is the IP of your Nagios server)
 +
 +  chown nagios:nagios /etc/nagios/nrpe.cfg
 +
 +-----
 +**ON THE NAGIOS SERVER MACHINE:**
 +
 +Add the client machine into one of the .cfg files
 +
 +I did this:
 +  vi /etc/nagios/nagios.cfg
 +ADD:
 + # Definitions for monitoring a linux machine
 + cfg_file=/etc/nagios/objects/linux.cfg
 +
 +  chown nagios:nagios /etc/nagios/nagios.cfg
 +
 +  vi /etc/nagios/objects/linux.cfg_file
 +   #########################################################
 +   # Linux  configuration file
 +   #########################################################
 +   
 +   define host {
 +     use     linux-server
 +     host_name   MyLinuxBox
 +     alias     LinuxBox1
 +     address   192.168.1.110
 +     register   1
 +     }
 +   define service{
 +     host_name MyLinuxBox
 +     service_description PING
 +     check_command check_ping!100.0,20%!500.0,60%
 +     max_check_attempts 2
 +     check_interval 2
 +     retry_interval 2
 +     check_period 24x7
 +     check_freshness 1
 +     contact_groups admins
 +     notification_interval 2
 +     notification_period 24x7
 +     notifications_enabled 1
 +     register 1
 +     }
 +   
 +   #########################################################
 +   # END OF FILE
 +   #########################################################
 +
 +  chown nagios:nagios /etc/nagios/objects/linux.cfg_file
 +
 +Restart Nagios
 +   /etc/rc.d/rc.nagios restart
 +
 +
 +
  
  

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