¿QUe es nagios?
Es un sistema de monitoreo de codigo libre (GNU), el cual se encarga del monitoreo tanto de servicios
software, como caracteristicas fisicas de los servidores (equipos) los cuales se encuentren en su lista
de monitoreo.
Tiene la opcion de enviar notificaciones via sms, email, etc.
La operacion de este sistema es através de plugins, los cuales como hemos visto en aplicaciones tales como firefox
chrome, thunderbird, nos ayudan a expandir las posibilidades de estas. por lo que de la misma manera estos plugins
ayudaran a mejorar la operacion de nagios.
Requisitos:
Solo un Servidor Linux, así como un compilador de C.
Un servidor web (apache) así como librerias gd.
Pasos para su instalación.
1) Create Account Information
A. Accedemos en modo root
1 2 | bash-4.1$ su Password: |
B. Creamos el grupo al cual se anexara el usuario.
1 2 | bash-4.1# groupadd nagcmd bash-4.1# groupadd nagios |
C. Creamos el usuario
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | bash-4.1# adduser Login name for new user []: nagiosusr User ID ('UID') [ defaults to next available ]: Initial group [ users ]: nagcmd Additional UNIX groups: nagios Users can belong to additional UNIX groups on the system. For local users using graphical desktop login managers such as XDM/KDM, users may need to be members of additional groups to access the full functionality of removable media devices. * Security implications * Please be aware that by adding users to additional groups may potentially give access to the removable media of other users. If you are creating a new user for remote shell access only, users do not need to belong to any additional groups as standard, so you may press ENTER at the next prompt. Press ENTER to continue without adding any additional groups Or press the UP arrow key to add/select/edit additional groups : Home directory [ /home/nagiosusr ] Shell [ /bin/bash ] Expiry date (YYYY-MM-DD) []: New account will be created as follows: --------------------------------------- Login name.......: nagiosusr UID..............: [ Next available ] Initial group....: nagcmd Additional groups: [ nagios ] Home directory...: /home/nagiosusr Shell............: /bin/bash Expiry date......: [ Never ] This is it... if you want to bail out, hit Control-C. Otherwise, press ENTER to go ahead and make the account. Creating new account... Changing the user information for nagiosusr Enter the new value, or press ENTER for the default Full Name []: Nagios User Room Number []: Work Phone []: Home Phone []: Other []: Changing password for nagiosusr Enter the new password (minimum of 5 characters) Please use a combination of upper and lower case letters and numbers. New password: Re-enter new password: passwd: password changed. Account setup complete. |
D. Agregamos Al usuario apache al grupo de nagios
–Validamos los grupos —
1 2 | bash-4.1# id apache uid=80(apache) gid=80(apache) groups=80(apache) |
— MOdificamos el usuario —
1 2 3 | bash-4.1# usermod -G nagcmd, nagios apache bash-4.1# id apache |
— Validamos los grupos actuales —
1 | uid=80(apache) gid=80(apache) groups=80(apache),1003(nagcmd) |
— El usuario nagiosusr ya se encuentra en el grupo —
1 2 3 4 5 6 7 | bash-4.1# id nagiosusr uid=1005(nagiosusr) gid=1002(nagcmd) groups=1002(nagcmd) bash-4.1# usermod -G nagios nagiosusr bash-4.1# id nagiosusr uid=1005(nagiosusr) gid=1002(nagcmd) groups=1002(nagcmd),1003(nagios) |
2) Download Nagios and the Plugins
A. Obtenemos los archivos correspondientes de Nagios en el siguiente URL: http://www.nagios.org/download/
B. Ubicados en la carpeta de nuestra elección, descomprimimos los archivos de Nagios Core y los Plugins.
1 2 3 4 5 | bash-4.1# pwd /usr/src/nagios bash-4.1# ls README birdseye.zip check_mk-1.1.10p3.tar.gz cnagios-0.29.tar.gz cnagios.pl nagios-3.2.3.tar.gz nagios-plugins-1.4.15.tar.gz nagiosInstallGuide_Me.txt nrpe-2.12.tar.gz |
3) Compile and Install Nagios
A. Descomprimimos el archivo de nagios core.
1 | bash-4.1# tar -zxvf nagios-3.2.3.tar.gz |
B. Ingresamos al directorio
1 | bash-4.1# cd nagios-3.2.3 |
C. Ejecutamos el script de configuracion (personalizamos el mismo de acuerdo a las caracteristicas de las
aplicaciones en nuestro slackware.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | bash-4.1# ./configure --prefix=/usr/nagios-3.2.3 \ --sysconfdir=/etc/nagios \ --localstatedir=/var/nagios \ --libdir=/usr/lib/nagios \ --disable-static \ --mandir=/usr/man \ --docdir=/usr/doc/nagios-3.2.3 \ --htmldir=/usr/doc/nagios-3.2.3/html \ --build=i686-slackware-linux \ --with-command-group=nagcmd \ --with-nagios-group=nagios \ --with-nagios-user=nagiosusr ... Creating sample config files in sample-config/ ... *** Configuration summary for nagios 3.2.3 10-03-2010 ***: General Options: ------------------------- Nagios executable: nagios Nagios user/group: nagios,nagios Command user/group: nagios,nagcmd Embedded Perl: no Event Broker: yes Install ${prefix}: /usr Lock file: /var/nagios.lock Check result directory: /var/spool/checkresults Init directory: /etc/rc.d/init.d Apache conf.d directory: /etc/httpd/conf.d Mail program: /bin/mail Host OS: linux-gnu Web Interface Options: ------------------------ HTML URL: http://localhost/nagios/ CGI URL: http://localhost/nagios/cgi-bin/ Traceroute (used by WAP): /usr/bin/traceroute Review the options above for accuracy. If they look okay, type 'make all' to compile the main program and CGIs. |
D. Realizamos la compilación.
1 | bash-4.1# make all |
E. Instalamos los binarios generados, archivos de configuración, y scripts de inicio.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | bash-4.1# make install cd ./base && make install make[1]: Entering directory `/usr/src/nagios/nagios-3.2.3/base' make install-basic make[2]: Entering directory `/usr/src/nagios/nagios-3.2.3/base' /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/bin /bin/ginstall -c -m 774 -o nagiosusr -g nagios nagios /usr/nagios-3.2.3/bin /bin/ginstall -c -m 774 -o nagiosusr -g nagios nagiostats /usr/nagios-3.2.3/bin make[2]: Leaving directory `/usr/src/nagios/nagios-3.2.3/base' make strip-post-install make[2]: Entering directory `/usr/src/nagios/nagios-3.2.3/base' /usr/bin/strip /usr/nagios-3.2.3/bin/nagios /usr/bin/strip /usr/nagios-3.2.3/bin/nagiostats make[2]: Leaving directory `/usr/src/nagios/nagios-3.2.3/base' make[1]: Leaving directory `/usr/src/nagios/nagios-3.2.3/base' cd ./cgi && make install make[1]: Entering directory `/usr/src/nagios/nagios-3.2.3/cgi' make install-basic make[2]: Entering directory `/usr/src/nagios/nagios-3.2.3/cgi' /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/sbin for file in *.cgi; do \ /bin/ginstall -c -m 775 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/sbin; \ done make[2]: Leaving directory `/usr/src/nagios/nagios-3.2.3/cgi' make strip-post-install make[2]: Entering directory `/usr/src/nagios/nagios-3.2.3/cgi' for file in *.cgi; do \ /usr/bin/strip /usr/nagios-3.2.3/sbin/$file; \ done make[2]: Leaving directory `/usr/src/nagios/nagios-3.2.3/cgi' make[1]: Leaving directory `/usr/src/nagios/nagios-3.2.3/cgi' cd ./html && make install make[1]: Entering directory `/usr/src/nagios/nagios-3.2.3/html' /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/media /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/stylesheets /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/contexthelp /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/docs /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/docs/images /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/images /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/images/logos /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/includes /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/share/ssi /bin/ginstall -c -m 664 -o nagiosusr -g nagios robots.txt /usr/nagios-3.2.3/share /bin/ginstall -c -m 664 -o nagiosusr -g nagios docs/robots.txt /usr/nagios-3.2.3/share/docs rm -f /usr/nagios-3.2.3/share/index.html rm -f /usr/nagios-3.2.3/share/main.html rm -f /usr/nagios-3.2.3/share/side.html for file in *.php; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share; done for file in stylesheets/*.css; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/stylesheets; done for file in contexthelp/*.html; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/contexthelp; done for file in docs/*.html; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/docs; done for file in docs/images/*.*; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/docs/images; done for file in images/*.gif; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/images; done for file in images/*.jpg; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/images; done for file in images/*.png; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/images; done for file in images/*.ico; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/images; done for file in images/logos/*.*; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/images/logos; done for file in includes/*.*; \ do /bin/ginstall -c -m 664 -o nagiosusr -g nagios $file /usr/nagios-3.2.3/share/includes; done make[1]: Leaving directory `/usr/src/nagios/nagios-3.2.3/html' make install-basic make[1]: Entering directory `/usr/src/nagios/nagios-3.2.3' /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /usr/nagios-3.2.3/libexec /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /var/nagios /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /var/nagios/archives /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /var/nagios/spool/checkresults if [ no = yes ]; then \ /bin/ginstall -c -m 664 -o nagiosusr -g nagios p1.pl /usr/nagios-3.2.3/bin; \ fi; *** Main program, CGIs and HTML files installed *** You can continue with installing Nagios as follows (type 'make' without any arguments for a list of all possible options): make install-init - This installs the init script in /etc/rc.d/init.d make install-commandmode - This installs and configures permissions on the directory for holding the external command file make install-config - This installs sample config files in /etc/nagios make[1]: Leaving directory `/usr/src/nagios/nagios-3.2.3' ... bash-4.1# make install-init /bin/ginstall -c -m 755 -d -o root -g root /etc/rc.d/init.d /bin/ginstall -c -m 755 -o root -g root daemon-init /etc/rc.d/init.d/nagios *** Init script installed *** bash-4.1# make install-commandmode /bin/ginstall -c -m 775 -o nagiosusr -g nagcmd -d /var/nagios/rw chmod g+s /var/nagios/rw *** External command directory configured *** bash-4.1# make install-config /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /etc/nagios /bin/ginstall -c -m 775 -o nagiosusr -g nagios -d /etc/nagios/objects /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/nagios.cfg /etc/nagios/nagios.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/cgi.cfg /etc/nagios/cgi.cfg /bin/ginstall -c -b -m 660 -o nagiosusr -g nagios sample-config/resource.cfg /etc/nagios/resource.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/template-object/templates.cfg /etc/nagios/objects/templates.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/template-object/commands.cfg /etc/nagios/objects/commands.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/template-object/contacts.cfg /etc/nagios/objects/contacts.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/template-object/timeperiods.cfg /etc/nagios/objects/timeperiods.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/template-object/localhost.cfg /etc/nagios/objects/localhost.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/template-object/windows.cfg /etc/nagios/objects/windows.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/template-object/printer.cfg /etc/nagios/objects/printer.cfg /bin/ginstall -c -b -m 664 -o nagiosusr -g nagios sample-config/template-object/switch.cfg /etc/nagios/objects/switch.cfg *** Config files installed *** Remember, these are *SAMPLE* config files. You'll need to read the documentation for more information on how to actually define services, hosts, etc. to fit your particular needs. |
De acuerdo a la Guia que leí de Fedora, aun no se puede correr ya que se requieren pasos adicionales.
Por lo que continuando.
4) Customize Configuration
Modificamos el archivo contacts.cfg que se encuentra en la ruta /etc definida anteriormente en nuestro paso 3C. Y agregamos
nuestra direccion de correo.
1 2 3 4 5 6 | bash-4.1# vi /etc/objects/contacts.cfg define contact{ .... email mi_correo@miserver ; <<***** CHANGE THIS TO YOUR EMAIL ADDRESS ****** } |
5) Configure the Web Interface
A. Instalamos los archivos de configuracion web de Nagios para apache.
1 2 3 4 | bash-4.1# make install-webconf /bin/ginstall -c -m 644 sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf /bin/ginstall: cannot create regular file `/etc/httpd/conf.d/nagios.conf': No such file or directory make: *** [install-webconf] Error 1 |
B. Dado que nuestro apache en Slack tiene las configuraciones directamente en la carpeta /etc/httpd, realizaremos
la copia del archivo manualmente.
1 | bash-4.1# /bin/ginstall -c -m 644 sample-config/httpd.conf /etc/httpd/nagios.conf |
C. Modificamos el archivo nagios.conf para que la configuracion de nuestro apache continue dentro del
directorio /etc/httpd de la siguiente manera.
1 | AuthUserFile /etc/httpd/htpasswd.users |
D. Modificamos la siguiente linea de comando htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin quedando
de la siguiente manera: htpasswd -c /etc/httpd/htpasswd.users nagiosadmin, ejecutamos.
1 2 3 4 | bash-4.1# htpasswd -c /etc/httpd/htpasswd.users nagiosadmin New password: Re-type new password: Adding password for user nagiosadmin |
E. En caso de tener el apache iniciado, habra que reiniciarlo, en otro caso, iniciarlo.
6) Compile and Install the Nagios Plugins
A. Extraemos el comprimido de los plugins e ingresamos a el.
1 2 | bash-4.1# tar -zxvf nagios-plugins-1.4.15.tar.gz bash-4.1# cd nagios-plugins-1.4.15/ |
B. Ejecutamos el script de configuracion de la misma manera que el core.
1 2 3 4 5 6 7 8 9 10 11 12 | ./configure --prefix=/usr/nagios-plugins-1.4.15 \ --sysconfdir=/etc/nagios-plugins \ --localstatedir=/var \ --libdir=/usr/lib/nagios-plugins \ --disable-static \ --mandir=/usr/man \ --docdir=/usr/doc/nagios-plugins-1.4.15 \ --htmldir=/usr/doc/nagios-plugins-1.4.15/html \ --build=i686-slackware-linux \ --with-command-group=nagcmd \ --with-nagios-group=nagios \ --with-nagios-user=nagiosusr |
C. Compilamos.
1 | bash-4.1# make |
D. Instalamos
1 | bash-4.1# make install |
E. Actualizamos librerias y ejecutamos un updatedb
1 2 | bash-4.1# ldconfig bash-4.1# updatedb |
7) Start Nagios
A. Verificamos una configuracion simple de Nagios
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | bash-4.1# /usr/bin/nagios -v /etc/nagios.cfg Nagios Core 3.2.3 Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors Copyright (c) 1999-2009 Ethan Galstad Last Modified: 10-03-2010 License: GPL Website: http://www.nagios.org Reading configuration data... Read main config file okay... Processing object config file '/etc/objects/commands.cfg'... Processing object config file '/etc/objects/contacts.cfg'... Processing object config file '/etc/objects/timeperiods.cfg'... Processing object config file '/etc/objects/templates.cfg'... Processing object config file '/etc/objects/localhost.cfg'... Read object config files okay... Running pre-flight check on configuration data... Checking services... Checked 8 services. Checking hosts... Checked 1 hosts. Checking host groups... Checked 1 host groups. Checking service groups... Checked 0 service groups. Checking contacts... Checked 1 contacts. Checking contact groups... Checked 1 contact groups. Checking service escalations... Checked 0 service escalations. Checking service dependencies... Checked 0 service dependencies. Checking host escalations... Checked 0 host escalations. Checking host dependencies... Checked 0 host dependencies. Checking commands... Checked 24 commands. Checking time periods... Checked 5 time periods. Checking for circular paths between hosts... Checking for circular host and service dependencies... Checking global event handlers... Checking obsessive compulsive processor commands... Checking misc settings... Total Warnings: 0 Total Errors: 0 Things look okay - No serious problems were detected during the pre-flight check |
B. Si no presenta errores, podemos iniciar nagios.
C. Al iniciar nagios obtenemos el siguiente error,
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | bash-4.1# nagios start -v Nagios Core 3.2.3 Copyright (c) 2009-2010 Nagios Core Development Team and Community Contributors Copyright (c) 1999-2009 Ethan Galstad Last Modified: 10-03-2010 License: GPL Website: http://www.nagios.org Error: Cannot open main configuration file '/root/start' for reading! Warning: Cannot open log file '/var/nagios.log' for writing Nagios 3.2.3 starting... (PID=9240) Warning: Cannot open log file '/var/nagios.log' for writing Local time is Sat Jul 02 18:41:52 CDT 2011 Warning: Cannot open log file '/var/nagios.log' for writing Warning: Cannot open log file '/var/nagios.log' for writing Bailing out due to one or more errors encountered in the configuration files. Run Nagios from the command line with the -v option to verify your config before restarting. (PID=9240) log_file=/var/log/nagios.log nagiosusr@devlnxMob:~$ /etc/init.d/nagios start Starting nagios:Password: touch: cannot touch `/var/log/nagios.log': Permission denied touch: no se puede efectuar `touch' sobre «/var/lock/subsys/nagios»: Permiso denegado done. |
Verificamos que todas las carpetas y archivos cuenten con los permisos necesarios para el usuario nagiosusr
D. Personalizar el archivo /etc/init.d/nagios de manera que los archivos se correspondan con el tipo
de proceso o informacion.
Ejecución.
A. Ejecutamos el binario de nagios:
1 | nagiosusr@devlnxMob:~$ /etc/init.d/nagios start |
El siguiente paso es adicional y corresponde exclusivamente a nuestra configuración de slackware.
1. Agregar el virtual host de nagios al httpd.conf.
1 2 | #Linea adicional para la configuracion de nagios Include /etc/httpd/nagios.conf |
URLs: