How to install Nagios 4.0.1 (Monitoring Tool) in ubuntu 13.10 server (Saucy Salamander)
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Some of the many features of Nagios Core include:
Monitoring of network services (SMTP, POP3, HTTP, NNTP, PING, etc.)
Monitoring of host resources (processor load, disk usage, etc.)
Simple plugin design that allows users to easily develop their own service checks
Parallelized service checks
Ability to define network host hierarchy using "parent" hosts, allowing detection of and distinction between hosts that are down and those that are unreachable
Contact notifications when service or host problems occur and get resolved (via email, pager, or user-defined method)
Ability to define event handlers to be run during service or host events for proactive problem resolution
Automatic log file rotation
Support for implementing redundant monitoring hosts
Optional web interface for viewing current network status, notification and problem history, log file, etc.
Preparing your system
We have already discussed how to install ubuntu 13.10 LAMP server and now you need to install the following extra packages
sudo apt-get install wget build-essential php5-gd wget libgd2-xpm libgd2-xpm-dev libapache2-mod-php5 apache2-utils daemon
Now you need to download nagios core and plugins from here
Adding the Nagios User and Group
Next add the appropriate user and group for the Nagios process to run
sudo useradd nagios
sudo groupadd nagcmd
sudo usermod -a -G nagcmd nagios
Now you need to install nagios core installation
You need to login as root and run the following commands
Extract the downloaded files (Nagios core and Plugins)
tar zxvf nagios-4.0.1.tar.gz
tar zxvf nagios-plugins-1.5.tar.gz
Change to the new Nagios directory and install the packages
cd nagios-4.0.1/
./configure --with-nagios-group=nagios --with-command-group=nagcmd -–with-mail=/usr/bin/sendmail
make all
make install
make install-init
make install-config
make install-commandmode
When you run the following command
make install-webconf
You might see the following error
/usr/bin/install -c -m 644 sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf
/usr/bin/install: cannot create regular file â/etc/httpd/conf.d/nagios.confâ: No such file or directory
make: *** [install-webconf] Error 1
As per the error message it's clear that nagios is trying to create the nagios.conf file inside the /etc/httpd.conf file to fix the problem try the following
mkdir /etc/httpd
mkdir /etc/httpd/conf.d
mkdir /etc/httpd/conf.d/nagios.conf
and Finally run the following command
sudo make install-webconf
You should see similar to the following output
/usr/bin/install -c -m 644 sample-config/httpd.conf /etc/httpd/conf.d/nagios.conf
*** Nagios/Apache conf file installed ***
Now following the next steps for nagions installation
cp -R contrib/eventhandlers/ /usr/local/nagios/libexec/
chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
/etc/init.d/nagios start
When i try to start nagios i got the following error
[email protected]:/# /etc/init.d/nagios start
/etc/init.d/nagios: 20: .: Can't open /etc/rc.d/init.d/functions
To fix the above error try the following commands to fix the problem try the following solution
Solution
wget https://raw.github.com/nicolargo/nagiosautoinstall/master/hack4nagiosstart.sh
chmod a+x ./hack4nagiosstart.sh
./hack4nagiosstart.sh
Now your nagios should start without any problem
Create a Default User for Web Access.
Add a default user for Web Interface Access:
htpasswd –c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Nagios Plugin installation
cd nagios-plugins-1.5
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
Nagios Service Setup
ln -s /etc/init.d/nagios /etc/rcS.d/S99nagios
Login Nagios Web Interface
After correctly following the procedures you should now be able to access your Nagios Core installation from a web browser.
Simply use the following:
http://
And log in with the credentials you chose when adding the nagiosadmin user to the htpasswd.users file
Hello,
I have finished my installation on Ubuntu Trusty and trying to connect from Windows 8 laptop to the link: http:///nagios
——————————————————
Not Found
The requested URL /nagios was not found on this server.
Apache/2.4.7 (Ubuntu) Server at 10.97.1.2 Port 80
———– All services seems to be working fine ———–
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3# ps -ef|grep nagios
nagios 22538 1 0 15:33 ? 00:00:00 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
nagios 22539 22538 0 15:33 ? 00:00:00 /usr/local/nagios/bin/nagios –worker /usr/local/nagios/var/rw/nagios.qh
nagios 22540 22538 0 15:33 ? 00:00:00 /usr/local/nagios/bin/nagios –worker /usr/local/nagios/var/rw/nagios.qh
nagios 22541 22538 0 15:33 ? 00:00:00 /usr/local/nagios/bin/nagios –worker /usr/local/nagios/var/rw/nagios.qh
nagios 22542 22538 0 15:33 ? 00:00:00 /usr/local/nagios/bin/nagios –worker /usr/local/nagios/var/rw/nagios.qh
nagios 22543 22538 0 15:33 ? 00:00:00 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
root 51005 65464 0 15:43 pts/2 00:00:00 grep nagios
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3# /etc/init.d/nagios start
Starting nagios: another instance of nagios is already running.
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3#
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3#
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3#
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3# ps -ef|grep apache
root 55129 65464 0 15:47 pts/2 00:00:00 grep apache
root 59170 1 0 15:10 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 59201 59170 0 15:10 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 59202 59170 0 15:10 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 59203 59170 0 15:10 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 59204 59170 0 15:10 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 59205 59170 0 15:10 ? 00:00:00 /usr/sbin/apache2 -k start
www-data 60515 59170 0 15:11 ? 00:00:00 /usr/sbin/apache2 -k start
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3# service apache restart
apache: unrecognized service
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3# service apache2 restart
* Restarting web server apache2 [ OK ]
[email protected]:/usr/local/src/opm/nagios-plugins-2.0.3#
I got that work out, did not notice that in the replies:
sudo ln -s /etc/httpd/conf.d/nagios.conf /etc/apache2/sites-enabled/000-nagios.conf
service apache2 restart
Sorry for duplicating post.
THANKS!!