Debian | Raspbian<\/p>\n
All steps on Debian require to run as root. To become root simply run:<\/p>\n
Debian:<\/p>\n
su<\/pre>\n<\/p>\n
Raspbian:<\/p>\n
sudo -i<\/pre>\n<\/p>\n
All commands from this point onwards will be as root.<\/p>\n
<\/p>\n
Security-Enhanced\u00a0Linux<\/dfn><\/h3>\n
This guide is based on SELinux being disabled or in permissive mode. SELinux is not enabled by default on Debian. If you would like to see if it is installed run the following command:<\/p>\n
dpkg -l selinux*\r\n<\/pre>\n<\/p>\n
Prerequisites<\/h3>\n
Perform these steps to install the pre-requisite packages.<\/p>\n
===== 7.x \/ 8.x =====<\/p>\n
apt-get update\r\napt-get install -y autoconf gcc libc6 make wget unzip apache2 apache2-utils php5 libgd2-xpm-dev\r\n<\/pre>\n<\/p>\n
===== 9.x =====<\/p>\n
apt-get update\r\napt-get install -y autoconf gcc libc6 make wget unzip apache2 apache2-utils php libgd-dev\r\n<\/pre>\n<\/p>\n
Downloading the\u00a0Source<\/dfn><\/h3>\n
cd \/tmp\r\nwget -O nagioscore.tar.gz https:\/\/github.com\/NagiosEnterprises\/nagioscore\/archive\/nagios-4.4.1.tar.gz\r\ntar xzf nagioscore.tar.gz\r\n<\/pre>\n<\/p>\n
Compile<\/h3>\n
cd \/tmp\/nagioscore-nagios-4.4.1\/\r\n.\/configure --with-httpd-conf=\/etc\/apache2\/sites-enabled\r\nmake all<\/pre>\n<\/p>\n
Create User And Group<\/h3>\n
This creates the\u00a0nagios\u00a0user and group. The\u00a0www-data\u00a0user is also added to the\u00a0nagios\u00a0group.<\/p>\n
make install-groups-users\r\nusermod -a -G nagios www-data\r\n<\/pre>\n<\/p>\n
Install Binaries<\/h3>\n
This step installs the binary files, CGIs, and HTML files.<\/p>\n
make install\r\n<\/pre>\n<\/p>\n
Install Service \/ Daemon<\/h3>\n
This installs the service or daemon files and also configures them to start on boot.<\/p>\n
make install-daemoninit\r\n<\/pre>\n<\/p>\n
Information on starting and stopping services will be explained further on.<\/p>\n
<\/p>\n
Install Command Mode<\/h3>\n
This installs and configures the external command file.<\/p>\n
make install-commandmode\r\n<\/pre>\n<\/p>\n
Install Configuration Files<\/h3>\n
This installs the *SAMPLE* configuration files. These are required as Nagios needs some configuration files to allow it to start.<\/p>\n
make install-config\r\n<\/pre>\n<\/p>\n
Install\u00a0Apache<\/dfn>\u00a0Config Files<\/h3>\n
This installs the\u00a0Apache<\/dfn>\u00a0web\u00a0server<\/dfn>\u00a0configuration files and configures the\u00a0Apache<\/dfn>\u00a0settings.<\/p>\n
make install-webconf\r\na2enmod rewrite\r\na2enmod cgi\r\n<\/pre>\n<\/p>\n
Configure\u00a0Firewall<\/dfn><\/h3>\n
You need to allow\u00a0port<\/dfn>\u00a080 inbound traffic on the local\u00a0firewall<\/dfn>\u00a0so you can reach the Nagios Core web interface.<\/p>\n
iptables -I INPUT -p tcp --destination-port 80 -j ACCEPT\r\napt-get install -y iptables-persistent\r\n<\/pre>\nAnswer yes to saving existing rules<\/p>\n
<\/p>\n
Create nagiosadmin User Account<\/h3>\n
You’ll need to create an\u00a0Apache<\/dfn>\u00a0user account to be able to log into Nagios.<\/p>\n
The following command will create a user account called nagiosadmin and you will be prompted to provide a password for the account.<\/p>\n
htpasswd -c \/usr\/local\/nagios\/etc\/htpasswd.users nagiosadmin\r\n<\/pre>\n<\/p>\n
\nWhen adding additional users in the future, you need to remove\u00a0-c<\/strong>\u00a0from the above command otherwise it will replace the existing nagiosadmin user\u00a0(and any other users you may have added)<\/em>.<\/p>\n<\/div>\n
<\/p>\n
Start\u00a0Apache<\/dfn>\u00a0Web\u00a0Server<\/dfn><\/h3>\n
===== 7.x =====<\/p>\n
Need to restart it because it is already running.<\/p>\n
service apache2 restart\r\n<\/pre>\n<\/p>\n
===== 8.x \/ 9.x =====<\/p>\n
Need to restart it because it is already running.<\/p>\n
systemctl restart apache2.service\r\n<\/pre>\n<\/p>\n
Start Service \/ Daemon<\/h3>\n
This command starts Nagios Core.<\/p>\n
===== 7.x =====<\/p>\n
service nagios start\r\n<\/pre>\n<\/p>\n
===== 8.x \/ 9.x =====<\/p>\n
systemctl start nagios.service\r\n<\/pre>\n<\/p>\n
Test Nagios<\/h3>\n
Nagios is now running, to confirm this you need to log into the Nagios Web Interface.<\/p>\n
Point your web browser to the\u00a0ip address<\/dfn>\u00a0or FQDN of your Nagios Core\u00a0server<\/dfn>, for example:<\/p>\n
http:\/\/10.25.5.143\/nagios<\/p>\n
http:\/\/core-013.domain.local\/nagios<\/p>\n
You will be prompted for a username and password. The username is\u00a0nagiosadmin\u00a0(you created it in a previous step) and the password is what you provided earlier.<\/p>\n
Once you have logged in you are presented with the Nagios interface. Congratulations you have installed Nagios Core.<\/p>\n
BUT WAIT …<\/h3>\n
Currently you have only installed the Nagios Core engine. You’ll notice some errors under the hosts and services along the lines of:<\/p>\n
(No output on stdout) stderr: execvp(\/usr\/local\/nagios\/libexec\/check_load, ...) failed. errno is 2: No such file or directory<\/pre>\nThese errors will be resolved once you install the Nagios Plugins, which is covered in the next step.<\/p>\n
<\/p>\n
Installing The Nagios Plugins<\/h3>\n
Nagios Core needs plugins to operate properly. The following steps will walk you through installing Nagios Plugins.<\/p>\n
\nThese steps install nagios-plugins 2.2.1. Newer versions will become available in the future and you can use those in the following installation steps. Please see the\u00a0releases page on GitHub<\/a>\u00a0for all available versions.<\/p>\n<\/div>\n
Please note that the following steps install most of the plugins that come in the Nagios Plugins package.\u00a0However there are some plugins that require other libraries which are not included in those instructions.\u00a0Please refer to the following KB article for detailed installation instructions:<\/p>\n