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Nagios
Nagios - http://nagios.org/
Documentation
- Nagios v4 Documentation - http://nagios.sourceforge.net/docs/nagioscore/4/en/toc.html
- Nagios v3 Documentation - http://nagios.sourceforge.net/docs/nagioscore/3/en/toc.html
Pronunciation
Nagios pronunciation « Nagios Community:
- "People are always asking me what the proper pronunciation of Nagios is. Here goes... By egalstad (Ethan Galstad)" (flash audio)
nog - e - ohs
Quick Install
Install epel repo, rpmforge
Install EPEL
or
Install DAG (rpmforge) repository: (only needed for CentOS 5)
rpm -Uhv http://apt.sw.be/redhat/el5/en/i386/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.i386.rpm
Install Nagios:
yum install nagios nagios-plugins
If you use the EPEL repo, you will need to install individual plugins, or 'nagios-plugins-all'.
# yum install nagios-plugins-all yum install nagios-plugins-ssh nagios-plugins-http nagios-plugins-ping nagios-plugins-tcp yum install nagios-plugins-load nagios-plugins-users nagios-plugins-swap nagios-plugins-procs nagios-plugins-disk
Documentation
Nagios documentation and quick start can be found here:
/usr/share/nagios/docs/ /usr/share/nagios/docs/quickstart.html http://nagios.sourceforge.net/docs
Online documentation:
Object Definitions (Services, Hosts, Etc) for Nagios v3:
Object Definitions (Services, Hosts, Etc) for Nagios v2
To view documentation locally:
ln -s /usr/share/nagios /var/www/html/nagios-docs http://[host]/nagios-docs/ # quick start guide http://[host]/nagios-docs/quickstart.html
Default Password
/etc/nagios/passwd
nagiosadmin:nagiosadmin # nagiosadmin:RbdO4ou4PNyMg
To change it:
htpasswd /etc/nagios/passwd nagiosadmin
Performance Tuning
Tuning Nagios For Maximum Performance:
- "So you've finally got Nagios up and running and you want to know how you can tweak it a bit... Here are a few things to look at for optimizing Nagios. Let me know if you think of any others..."
Quick Configuration
Change contact email address:
/etc/nagios/objects/contacts.cfg
define contact{
contact_name nagiosadmin
# change email
email nagios@k.ttak.org
...
}
# add contact
define contact{
contact_name kenneth
use generic-contact
alias Kenneth Burgener
email nagios@k.ttak.org
}
define contactgroup{
contactgroup_name admins
alias Nagios Administrators
#members nagiosadmin,admin,kenneth,mark
# add kenneth
members nagiosadmin,kenneth
}
Create an authentication file:
# htpasswd -c /etc/nagios/htpasswd.users nagiosadmin htpasswd /etc/nagios/passwd admin htpasswd /etc/nagios/passwd kenneth
Note: if you choose a user name other than 'nagiosadmin' make sure to add privileges to the cgi.cfg:
/etc/nagios/cgi.cfg
authorized_for_system_information=nagiosadmin,admin authorized_for_configuration_information=nagiosadmin,admin ...
# or #sed -i 's/nagiosadmin^/nagiosadmin,admin/g' /etc/nagios/cgi.cfg sed -i 's/nagiosadmin/nagiosadmin,admin/g' /etc/nagios/cgi.cfg
NOTE: "You may use an asterisk (*) to authorize any user who has authenticated to the web server."
sed -i 's/nagiosadmin^/*/g' /etc/nagios/cgi.cfg
Restart apache:
service httpd restart
Verify nagios configuration files:
nagios -v /etc/nagios/nagios.cfg
Restart nagios:
service nagios restart
View nagios:
http://[HOST]/nagios/
The default configuration has a few monitoring points for the localhost.
Host and Services v2
/servers/
contacts.cfg:
##
## CONTACTS
##
define contact {
contact_name kenneth
alias Kenneth Burgener
email kenneth.burgener@oeey.com
service_notification_period 24x7
host_notification_period 24x7
service_notification_options w,u,c,r
host_notification_options d,r
service_notification_commands notify-by-email
host_notification_commands host-notify-by-email
;service_notification_commands notify-service-by-email ; defined in commands.cfg
;host_notification_commands notify-host-by-email ; defined in commands.cfg
}
internet.cfg:
##
## INTERNET
##
define contactgroup {
contactgroup_name contactgroup-internet
alias Internet Contact Group
members kenneth
}
define host {
name host-internet
host_name internet
alias Internet Connection
address www.google.com
notification_enabled 1 ; host notifications are enabled
event_handler_enabled 1 ; event handler is enabled
; If a service fails, check if host is alive...
check_command check-host-alive ; check host status command
check_period 24x7 ; when checks can be made
max_check_attempts 5 ; max check attempts verification
; host failure notification settings...
notification_interval 1440 ; minutes between down email notifications
notification_period 24x7 ; when notifications can be sent
notification_options d,u,r ; notify of down, up and recover states
; contacts - ; (or use contact_groups)
contact_groups contactgroup-internet ; contacts to notify
}
define service {
name service-internet ; template name
service_description service-internet ; service description
host_name internet
;; check_command -
initial_state u ; initially start in unknown state (not required)
check_interval 5 ; normal check interval
check_period 24x7 ; when to check service
retry_interval 2 ; state change retry interval
max_check_attempts 5 ; number of times to use retry_interval
notification_interval 360 ; notify every 6 hours
notification_period 24x7 ; when can notifications be sent
notification_options w,c,r ; notify on warning, critical and recovery states (not required)
; contacts - ; (or use contact_groups)
contact_groups contactgroup-internet
service_description Check PING
check_command check_ping!100.0,20%!500.0,60%
}
test.cfg:
##
## TEMPLATES AND GROUPS
##
; Contact Group
define contactgroup {
contactgroup_name contactgroup-test
alias Test Contact Group
members admin
}
; Template Host
define host {
name host-test ; template name
parents internet ; don't check if parent is down
notification_enabled 1 ; host notifications are enabled
event_handler_enabled 1 ; event handler is enabled
; If a service fails, check if host is alive...
check_command check-host-alive ; check host status command
check_period 24x7 ; when checks can be made
max_check_attempts 5 ; max check attempts verification
; host failure notification settings...
notification_interval 1440 ; minutes between down email notifications
notification_period 24x7 ; when notifications can be sent
notification_options d,u,r ; notify of down, up and recover states
; contacts - ; (or use contact_groups)
contact_groups contactgroup-test ; contacts to notify
register 0 ; this is a template
}
; Template service
define service {
name service-test ; template name
service_description service-test-template ; service description
;; check_command -
initial_state u ; initially start in unknown state (not required)
check_interval 5 ; normal check interval
check_period 24x7 ; when to check service
retry_interval 2 ; state change retry interval
max_check_attempts 5 ; number of times to use retry_interval
notification_interval 360 ; notify every 6 hours
notification_period 24x7 ; when can notifications be sent
notification_options w,c,r ; notify on warning, critical and recovery states (not required)
; contacts - ; (or use contact_groups)
contact_groups contactgroup-test
register 0
}
define hostgroup {
hostgroup_name hostgroup-test
alias test Project Servers
members cs01,cs02,cs03,cs04,cs05,cs06,cs07,cs08,cs09,cs10,cs11,cs12
}
##
## HOSTS
##
define host {
use host-test
host_name cs01
alias test System #01
address 216.119.200.1
}
define host {
use host-test
host_name cs02
alias test System #02
address 216.119.200.2
}
##
## SERVICES
##
define service {
use service-test
host_name cs01
service_description Check PING
check_command check_ping!100.0,20%!500.0,60%
}
define service {
use service-test
host_name cs02
service_description Check VNC
check_command check_tcp!5900!1
}
Host and Services v3
##
## CONTACTS
##
define contact {
contact_name kenneth
alias Kenneth Burgener
email kburgener@oeey.com
service_notification_period 24x7
host_notification_period 24x7
service_notification_options w,u,c,r
host_notification_options d,r
service_notification_commands notify-service-by-email
host_notification_commands notify-host-by-email
}
##
## SERVER HEADERS
##
; Contact Group
define contactgroup {
contactgroup_name contactgroup-lab
alias lab Contact Group
members admin
}
; Template Host
define host {
name lab-host
;; host_name -
;; alias -
; use generic-host
max_check_attempts 1
; check_period
; notification_interval #
; notification_period timeperiod
;
; contacts - ; (or use contact_groups)
contact_groups contactgroup-lab
register 0
}
; Template service
define service {
name lab-service
service_description lab-service-template
;; check_command -
initial_state u ; initially start in unknown state (not required)
check_interval 5 ; normal check interval
check_period 24x7 ; when to check service
retry_interval 2 ; state change retry interval
max_check_attempts 5 ; number of times to use retry_interval
notification_interval 360 ; notify every 6 hours
notification_period 24x7 ; when can notifications be sent
notification_options w,c,r ; notify on warning, critical and recovery states (not required)
; contacts - ; (or use contact_groups)
contact_groups contactgroup-lab
register 0
}
define hostgroup {
hostgroup_name lab-group
alias Lab Servers
members cs01,cs02
}
##
## HOSTS
##
define host {
use lab-host
host_name cs01
alias lab System #01
address 216.119.200.1
}
define host {
use lab-host
host_name cs01
alias lab System #01
address cs01
}
##
## SERVICES
##
define service {
use lab-service
host_name cs01,cs02
service_description Check PING
check_command check_ping!100.0,20%!500.0,60%
}
define service {
use lab-service
host_name cs02
service_description Check VNC
check_command check_tcp!5900!1
}
define service {
use lab-service
host_name cs02
service_description Check HTTP
check_command check_http
}
Verify Configuration Files
To check and test and verify the configuration files: (lint testing)
nagios -v /etc/nagios/nagios.cfg
Other Related Projects
- NagVis is a visualization addon for the well known network managment system Nagios.
Manual 4.x Installation
Install dependencies:
yum install httpd php gcc make glibc glibc-common gd gd-devel wget openssl-devel
# missing: glibc glibc-common apt-get install apache2 php5 gcc make php5-gd libgd2-xpm libgd2-xpm-dev wget libssl-dev
Get Nagios and Plugins (Download Nagios)
mkdir -p ~/.src ; cd ~/.src wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-4.0.1.tar.gz wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz
Build and Install Nagios:
sudo /usr/sbin/adduser nagios cd ~/.src tar -zvxf nagios-4.0.1.tar.gz cd nagios-4.0.1 ./configure --prefix=/opt/nagios make clean # remove previous build artifcats make all # compile only # sudo make install # includes: install-base install-cgis install-html install-exfoliation install-basic # sudo make install install-init install-commandmode install-config install-webconf # finish off missing components
sudo make fullinstall # includes: install install-init install-commandmode install-webconf sudo make install-config # includes: sample config, not required, but recommended # option other frontend installs: sudo make install-exfoliation install-classicui
For convenience:
sudo ln -s /opt/nagios/etc /etc/nagios
---
Install options after 'make all'
*** Compile finished ***
If the main program and CGIs compiled without any errors, you
can continue with installing Nagios as follows (type 'make'
without any arguments for a list of all possible options):
make install
- This installs the main program, CGIs, and HTML files
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 /opt/nagios/etc
You'll have to modify these sample files before you can
use Nagios. Read the HTML documentation for more info
on doing this. Pay particular attention to the docs on
object configuration files, as they determine what/how
things get monitored!
make install-webconf
- This installs the Apache config file for the Nagios
web interface
make install-exfoliation
- This installs the Exfoliation theme for the Nagios
web interface
make install-classicui
- This installs the classic theme for the Nagios
web interface
---
Compile and Install the Nagios Plugins:
cd ~/.src tar -zvxf nagios-plugins-1.5.tar.gz cd nagios-plugins-1.5 ./configure --with-nagios-user=nagios --with-nagios-group=nagios --prefix=/opt/nagios make sudo make install
Plugins are installed to: /opt/nagios/libexec
---
Install and Configure the Web Interface:
# sudo make install-webconf # part of 'make fullinstall' # NOTE: adds: /etc/httpd/conf.d/nagios.conf sed -i 's/nagiosadmin/admin/' /opt/nagios/etc/cgi.cfg # rename nagiosadmin to admin sed -i 's/nagiosadmin/admin/' /opt/nagios/etc/objects/contacts.cfg # rename nagiosadmin to admin #sudo htpasswd -c /opt/nagios/etc/htpasswd.users admin # give admin a password sudo htpasswd -bc /opt/nagios/etc/htpasswd.users admin password12 sudo /sbin/service httpd restart sudo service apache2 restart
General sample config cleanup:
mkdir /opt/nagios/etc/servers
sed -i 's%#cfg_dir=/opt/nagios/etc/servers%cfg_dir=/opt/nagios/etc/servers%' /opt/nagios/etc/nagios.cfg
mkdir /opt/nagios/etc/bak
mv /opt/nagios/etc/objects/{printer.cfg,switch.cfg,windows.cfg,localhost.cfg} /opt/nagios/etc/bak
sed -i 's%cfg_file=/opt/nagios/etc/objects/localhost.cfg%#cfg_file=/opt/nagios/etc/objects/localhost.cfg%' /opt/nagios/etc/nagios.cfg
# Note: if you don't add some hosts and services, you will get a "no service/hosts defined" error
EMAIL=kenneth@t0e.org # CHANGEME
sed -i "s/nagios@localhost/$EMAIL/" /opt/nagios/etc/objects/contacts.cfg
servers/test.cfg:
cat > /opt/nagios/etc/servers/test.cfg <<"EOF"
; Contact Group
define contactgroup {
contactgroup_name contactgroup-test
alias test Contact Group
;members admin
}
; Template Host
define host {
name test-host
max_check_attempts 1
contact_groups contactgroup-test
register 0
}
; Template service
define service {
name test-service
service_description test-service-template
;; check_command -
initial_state u ; initially start in unknown state (not required)
check_interval 5 ; normal check interval
check_period 24x7 ; when to check service
retry_interval 2 ; state change retry interval
max_check_attempts 5 ; number of times to use retry_interval
notification_interval 1440 ; notify once a day
notification_period 24x7 ; when can notifications be sent
notification_options w,c,r ; notify on warning, critical and recovery states (not required)
; contacts - ; (or use contact_groups)
contact_groups contactgroup-test
register 0
}
define hostgroup {
hostgroup_name test-group
alias Lab Servers
#members jira
}
##
## HOSTS
##
define host {
use test-host
host_name test1
alias test1
address test1.webconnectmd.com
}
##
## SERVICES
##
define service {
use test-service
host_name test1
service_description Check PING
check_command check_ping!100.0,20%!500.0,60%
}
#define service {
# use test-service
# host_name test1
# service_description Check HTTP
# check_command check_http
# }
define service {
use test-service
host_name test1
service_description Check SSH
check_command check_ssh
}
#define service {
# use test-service
# host_name test1
# service_description Check DB
# check_command check_by_ssh!/opt/nagios/check_db
# }
##
## COMMANDS
##
# 'check_pop' command definition
define command{
command_name check_by_ssh
command_line $USER1$/check_by_ssh -H $HOSTADDRESS$ $ARG1$
}
EOF
Verify configuration:
/opt/nagios/bin/nagios -v /opt/nagios/etc/nagios.cfg
Start Nagios:
sudo /sbin/chkconfig --add nagios sudo /sbin/chkconfig nagios on sudo /sbin/service nagios start # console: /opt/nagios/bin/nagios /opt/nagios/etc/nagios.cfg # daemon: /opt/nagios/bin/nagios -d /opt/nagios/etc/nagios.cfg
Login to the Web Interface:
# user: admin # password: <set with the htpasswd command above> http://localhost/nagios
Congratulations you now have a working Nagios installation that will monitor your local box.
References:
- Nagios Quickstart Installation Guides - http://nagios.sourceforge.net/docs/3_0/quickstart.html
ubuntu init.d fix
# if you need a fresh copy cp ~/.src/nagios-4.0.1/daemon-init /etc/init.d/nagios
startup - Nagios 4: Can’t open /etc/rc.d/init.d/functions - Stack Overflow [1]
apt-get install daemon sudo sed -i 's/^\.\ \/etc\/rc.d\/init.d\/functions$/\.\ \/lib\/lsb\/init-functions/g' /etc/init.d/nagios sudo sed -i 's/status\ /status_of_proc\ /g' /etc/init.d/nagios sudo sed -i 's/daemon\ --user=\$user\ \$exec\ -ud\ \$config/daemon\ --user=\$user\ --\ \$exec\ -d\ \$config/g' /etc/init.d/nagios sudo sed -i 's/\/var\/lock\/subsys\/\$prog/\/var\/lock\/\$prog/g' /etc/init.d/nagios sudo service nagios start
My additional fixes:
sudo sed -i 's#/sbin/service#/usr/sbin/service#g' /etc/init.d/nagios
sudo sed -i 's/-n \$"/-n "/g' /etc/init.d/nagios
sudo sed -i 's#if test "$checkconfig" == "false"; then#if test "$checkconfig" = "false"; then#g' /etc/init.d/nagios
sudo sed -i 's#$nice runuser -s /bin/bash - $user -c#$nice su - $user -c#g' /etc/init.d/nagios
sudo sed -i 's#killproc -p ${pidfile} -d 10 $exec#killproc -p ${pidfile} $exec#g' /etc/init.d/nagios
sudo sed -i 's#: "#..."#g' /etc/init.d/nagios
sudo sed -i 's/# Short-Description/# Default-Start:\t2\n# Default-Stop:\n# Short-Description/g' /etc/init.d/nagios
Give permission to run commands:
chown /opt/nagios/var/rw nagios:www-data nagios.cmd
update-rc.d nagios defaults service nagios restart
Manual 3.x Installation
Install dependencies:
yum install httpd php gcc make glibc glibc-common gd gd-devel wget openssl-devel # httpd php # gcc make # glibc glibc-common # gd gd-devel # wget
Get Nagios and Plugins (Download Nagios)
mkdir -p ~/.src ; cd ~/.src# wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.2.3.tar.gzwget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.3.1.tar.gz wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz
Build and Install Nagios:
sudo /usr/sbin/adduser nagios cd ~/.src tar -zvxf nagios-3.3.1.tar.gz cd nagios ./configure --prefix=/opt/nagios make clean # remove previous build artifcats make all # compile only # sudo make install # includes: install-base install-cgis install-html install-exfoliation install-basic # sudo make install install-init install-commandmode install-config install-webconf # finish off missing components
sudo make fullinstall # includes: install install-init install-commandmode install-webconf sudo make install-config # includes: sample config, not required, but recommended # option other installs: sudo make install-exfoliation install-classicui
NOTE: See patch for 3.3.1 below...
Install options after 'make all'
*** Compile finished ***
If the main program and CGIs compiled without any errors, you
can continue with installing Nagios as follows (type 'make'
without any arguments for a list of all possible options):
make install
- This installs the main program, CGIs, and HTML files
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 /opt/nagios/etc
You'll have to modify these sample files before you can
use Nagios. Read the HTML documentation for more info
on doing this. Pay particular attention to the docs on
object configuration files, as they determine what/how
things get monitored!
make install-webconf
- This installs the Apache config file for the Nagios
web interface
make install-exfoliation
- This installs the Exfoliation theme for the Nagios
web interface
make install-classicui
- This installs the classic theme for the Nagios
web interface
Compile and Install the Nagios Plugins:
cd ~/.src tar -zvxf nagios-plugins-1.4.15.tar.gz cd nagios-plugins-1.4.15 ./configure --with-nagios-user=nagios --with-nagios-group=nagios --prefix=/opt/nagios make sudo make install
Install and Configure the Web Interface:
# sudo make install-webconf # part of 'make fullinstall' # NOTE: adds: /etc/httpd/conf.d/nagios.conf sed -i 's/nagiosadmin/admin/' /opt/nagios/etc/cgi.cfg # rename nagiosadmin to admin sed -i 's/nagiosadmin/admin/' /opt/nagios/etc/objects/contacts.cfg # rename nagiosadmin to admin sudo htpasswd -c /opt/nagios/etc/htpasswd.users admin # give admin a password sudo /sbin/service httpd restart
General sample config cleanup:
mkdir /opt/nagios/etc/servers
sed -i 's%#cfg_dir=/opt/nagios/etc/servers%cfg_dir=/opt/nagios/etc/servers%' /opt/nagios/etc/nagios.cfg
mkdir /opt/nagios/etc/bak
mv /opt/nagios/etc/objects/{printer.cfg,switch.cfg,windows.cfg,localhost.cfg} /opt/nagios/etc/bak
sed -i 's%cfg_file=/opt/nagios/etc/objects/localhost.cfg%#cfg_file=/opt/nagios/etc/objects/localhost.cfg%' /opt/nagios/etc/nagios.cfg
# Note: if you don't add some hosts and services, you will get a "no service/hosts defined" error
EMAIL=kenneth@t0e.org # CHANGEME
sed -i "s/nagios@localhost/$EMAIL/" /opt/nagios/etc/objects/contacts.cfg
Start Nagios:
sudo /sbin/chkconfig --add nagios sudo /sbin/chkconfig nagios on sudo /sbin/service nagios start
Login to the Web Interface:
# user: admin # password: <set with the htpasswd command above> http://localhost/nagios
Congratulations you now have a working Nagios installation that will monitor your local box.
References:
- Nagios Quickstart Installation Guides - http://nagios.sourceforge.net/docs/3_0/quickstart.html
Patch 3.3.1
Patch for 3.3.1: (run before configure)
cat > nagios-3.3.1.patch --- html/Makefile.in.orig 2011-09-06 15:01:37.488688413 -0400 +++ html/Makefile.in 2011-09-06 15:01:47.397049354 -0400 @@ -75,7 +75,7 @@ do $(INSTALL) -m 664 $(INSTALL_OPTS) $$file $(DESTDIR)$(HTMLDIR)/images/logos; done for file in includes/*.*; \ do $(INSTALL) -m 664 $(INSTALL_OPTS) $$file $(DESTDIR)$(HTMLDIR)/includes; done - for file in includes/rss/*; \ + -for file in includes/rss/*; \ do $(INSTALL) -m 664 $(INSTALL_OPTS) $$file $(DESTDIR)$(HTMLDIR)/includes/rss; done for file in includes/rss/extlib/*; \ do $(INSTALL) -m 664 $(INSTALL_OPTS) $$file $(DESTDIR)$(HTMLDIR)/includes/rss/extlib; done
patch -p0 < nagios-3.3.1.patch
Add another admin user
To add an admin user for the Web Interface:
sudo htpasswd /opt/nagios/etc/htpasswd.users newadmin
Add new user to the configuration file /opt/nagios/etc/cgi.cfg:
authorized_for_system_information=admin,newadmin authorized_for_configuration_information=admin,newadmin authorized_for_system_commands=admin,newadmin authorized_for_all_services=admin,newadmin authorized_for_all_hosts=admin,newadmin authorized_for_all_service_commands=admin,newadmin authorized_for_all_host_commands=admin,newadmin
# Or quick method (and works for each additional as well) sed -i 's/=admin/=admin,newadmin/' /opt/nagios/etc/cgi.cfg
Remove web basic authentication
Read Only Access
/etc/httpd/conf.d/nagios.conf:
# MAKE CHANGE TO BOTH OF THESE SECTIONS... <Directory "/opt/nagios/sbin"> <Directory "/opt/nagios/share"> # AuthName "Nagios Access" # AuthType Basic # AuthUserFile /opt/nagios/etc/htpasswd.users # Require valid-user
/opt/nagios/etc/cgi.cfg:
use_authentication=0
NOTE: You will not be able to use the External Command Interface with authentication =0
- External Command Interface
- Sorry Dave, I can't let you do that...
- It seems that you have chosen to not use the authentication functionality of the CGIs.
- I don't want to be personally responsible for what may happen as a result of allowing unauthorized users to issue commands to Nagios,so you'll have to disable this safeguard if you are really stubborn and want to invite trouble.
- Read the section on CGI authentication in the HTML documentation to learn how you can enable authentication and why you should want to.
References:
- Authentication And Authorization In The CGIs - https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/4/en/cgiauth.html
Allow External Command Interface
/etc/httpd/conf.d/nagios.conf:
# MAKE CHANGE TO BOTH OF THESE SECTIONS... <Directory "/opt/nagios/sbin"> <Directory "/opt/nagios/share"> # AuthName "Nagios Access" # AuthType Basic # AuthUserFile /opt/nagios/etc/htpasswd.users # Require valid-user
/opt/nagios/etc/cgi.cfg:
use_authentication=1 default_user_name=admin
Give the 'admin' user rights everywhere in cgi.cfg.
Give permission to nagios.cmd (parent folder, as .cmd file gets rewritten each restart):
chmod g+s /opt/nagios/var/rw chown :nagios /opt/nagios/var/rw service nagios restart
Manual Installation #1 - archive
Nagios Quickstart Installation Guides
Install dependencies:
yum install httpd yum install gcc yum install glibc glibc-common yum install gd gd-devel
Create nagios user and group:
sudo /usr/sbin/useradd nagios sudo /usr/sbin/groupadd nagcmd sudo /usr/sbin/usermod -G nagcmd nagios sudo /usr/sbin/usermod -G nagcmd apache
Create build directory:
mkdir ~/nagios cd ~/nagios
Get Nagios (Download Nagios)
wget http://superb-west.dl.sourceforge.net/sourceforge/nagios/nagios-3.0.1.tar.gz
Get Plugins (Download Nagios)
wget http://superb-east.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.11.tar.gz
Build Nagios:
tar -zvxf nagios-3.0.1.tar.gz cd nagios-3.0.1 ./configure --with-command-group=nagcmd make all
Install Nagios:
sudo make install sudo make install-init sudo make install-config sudo make install-commandmode
Configure Nagios (/usr/local/nagios/etc):
# Set the nagiosadmin email address sudo vi /usr/local/nagios/etc/objects/contacts.cfg
Install and Configure the Web Interface:
sudo make install-webconf sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin sudo /sbin/service httpd restart
Compile and Install the Nagios Plugins:
cd ~/nagios tar -zvxf nagios-plugins-1.4.11.tar.gz cd nagios-plugins-1.4.11 ./configure --with-nagios-user=nagios --with-nagios-group=nagios make sudo make install
Start Nagios:
sudo /sbin/chkconfig --add nagios sudo /sbin/chkconfig nagios on sudo /sbin/service nagios start
Login to the Web Interface:
# user: nagiosadmin # password: <set with the htpasswd command above> http://localhost/nagios
Check the "Service Detail" tab for services being monitored on this server.
To add an admin user for the Web Interface:
sudo htpasswd /usr/local/nagios/etc/htpasswd.users admin
Add admin user to the configuration file /usr/local/nagios/etc/cgi.cfg:
authorized_for_system_information=nagiosadmin,admin authorized_for_configuration_information=nagiosadmin,admin authorized_for_system_commands=nagiosadmin,admin authorized_for_all_services=nagiosadmin,admin authorized_for_all_hosts=nagiosadmin,admin authorized_for_all_service_commands=nagiosadmin,admin authorized_for_all_host_commands=nagiosadmin,admin
Congratulations you now have a working Nagios installation that will monitor your local box.
Manual Installation #2 - archive
yum install gd gd-devel php-gd
Libiconv:
## http://www.gnu.org/s/libiconv/ wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.13.1.tar.gz tar -zvxf libiconv-1.13.1.tar.gz cd libiconv-1.13.1 ./configure make make install export LD_LIBRARY_PATH=/usr/local/lib
GD:
## GD http://www.boutell.com/gd/ ## COULD NOT GET WORKING RIGHT yum install gcc automake libpng libjpeg zlib freetype libtool \ freetype-devel fontconfig-devel libjpeg-devel libpng-devel xorg-x11-devel mkdir -p ~/src ; cd ~/src hg clone https://bitbucket.org/pierrejoye/gd-libgd ## docs/INSTALL cd gd-libgd/src cp -r ../config ../test . ./bootstrap.sh ./configure --prefix=/opt/gd make install
Install Nagios:
yum install gcc httpd php mkdir -p ~/src ; cd ~/src wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.2.3.tar.gz tar -zvxf nagios-3.2.3.tar.gz cd nagios-3.2.3 ./configure --prefix=/opt/nagios make all adduser nagios make install install-init install-commandmode install-config install-webconf
Install Nagios Plugins:
mkdir -p ~/src ; cd ~/src wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz tar -zvxf nagios-plugins-1.4.15.tar.gz cd nagios-plugins-1.4.15 ./configure --prefix=/opt/nagios make make install
- The requested URL /nagios/cgi-bin/statusmap.cgi was not found on this server.
- The requested URL /nagios/cgi-bin/trends.cgi was not found on this server.
- The requested URL /nagios/cgi-bin/histogram.cgi was not found on this server.
Pronunciation
Nagios FAQ F0003 - How "Nagios" is pronounced - http://support.nagios.com/knowledgebase/faqs/index.php?id=52&faq_id=3:
- "I pronounce Nagios as:
- nah-ghee-ose
- At least I think that's how I pronounce it (damn phonetic spelling)... The "Na" sounds like "Nah", "gi" sounds like the first part of "geese", and "os" sounds like the last part of "verbose". You can pronounce it however the heck you'd like.
- Alternative pronounciations vary. One that I liked is "nachos". Mmmmmm.... nachos. "
Nagios FAQ F0002 - What does Nagios mean - http://support.nagios.com/knowledgebase/faqs/index.php?id=52&faq_id=2:
- The official meaning is that N.A.G.I.O.S. is a recursive acronym which stands for "Nagios Ain't Gonna Insist On Sainthood". It's a spoof on the software's previous name of "NetSaint", which I decided to abandon after it caused me much emotional distress.
- An alternative meaning suggested by Sam Tilders is...
- Notices
- Any
- Glitch
- In
- Our
- System
- A few people have suggested that "Nagios" might be derived from the Greek word "hagios" which means "sacred" or "holy" (i.e. saintly). If you decide you want to go with that interpretation, you'll have to live with this delicious twist... "hagios" also means "accursed" or "execrable" according to the Liddell-Scott-Jones Greek Lexicon. So let me get this straight - you're saying that you you think Nagios is a bastardized upgrade of NetSaint? Eh? :-)
Nagios pronunciation « Nagios Community:
- "People are always asking me what the proper pronunciation of Nagios is. Here goes... By egalstad (Ethan Galstad)" (flash audio)
Tricks for Object Definitions
Time-Saving Tricks For Object Definitions - http://nagios.sourceforge.net/docs/nagioscore/3/en/objecttricks.html
- This documentation attempts to explain how you can exploit the (somewhat) hidden features of template-based object definitions to save your sanity. How so, you ask? Several types of objects allow you to specify multiple host names and/or hostgroup names in definitions, allowing you to "copy" the object defintion to multiple hosts or services. I'll cover each type of object that supports these features seperately.
UTOSC 2012 Nagios Install
site: http://tinyurl.com/naginstall
My modifications: https://docs.google.com/document/d/1xSZJrc_On3YcH9ulp8PSBMLAARXTKwNjS4VtbeL_dnw/edit
TO READ
Nagios Central Monitoring - http://beginlinux.com/blog/2010/03/nagios-central-monitoring/
Issues
Nagios is currently not checking for external commands
When trying to manually reschedule a check:
Sorry, but Nagios is currently not checking for external commands, so your command will not be committed! Read the documentation for information on how to enable external commands
/etc/nagios3/nagios.cfg:
check_external_commands=1
#command_check_interval=15s command_check_interval=-1
command_file=/var/lib/nagios3/rw/nagios.cmd
Add www-data to nagios group in /etc/group
nagios:x:120:www-data
restart apache2:
service apache2 restart service nagios3 restart
Ref: http://technosophos.com/2010/01/13/nagios-fixing-error-could-not-stat-command-file-debian.html
---
Note:
Error: Could not stat() command file '/var/lib/nagios3/rw/nagios.cmd
This is because of the bug in Debian, which is described here http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=571801.
Solution:
/etc/init.d/nagios3 stop dpkg-statoverride --update --add nagios www-data 2710 /var/lib/nagios3/rw dpkg-statoverride --update --add nagios nagios 751 /var/lib/nagios3 /etc/init.d/nagios3 start
Invalid option - SSL is not available
When trying to run check_http with the '-S' for SSL option:
Invalid option - SSL is not available
Cause:
- OpenSSL was not available when the Nagios plugins were compiled.
Solution:
- Install openssl-devel package and recompile the Nagios plugins.
References:
/run/lxcfs/controllers is not accessible
Ubuntu
Error:
DISK CRITICAL - /run/lxcfs/controllers is not accessible: Permission denied
/etc/nagios-plugins/config/disk.cfg
check_all_disks
command_line ... -A --exclude-type=tracefs --exclude-type=cgroup --exclude_device=/run/lxcfs/controllers
test:
sudo -u nagios /usr/lib/nagios/plugins/check_disk -w '20%' -c '10%' -e sudo -u nagios /usr/lib/nagios/plugins/check_disk -w '20%' -c '10%' -e -A --exclude-type=tracefs --exclude-type=cgroup --exclude_device=/run/lxcfs/controllers
https://bugs.launchpad.net/ubuntu/+source/nagios-plugins/+bug/1516451