Icinga

Icinga with IDOUtils Quickstart

Introduction

This guide is intended to provide you with simple instructions on how to install Icinga from source (code) and have it monitoring your local machine within 20 minutes.

No advanced installation options are discussed here - just the basics that will work for most of the users who want to get started.

This guide will give you examples for currently three different Linux distributions: Fedora, Ubuntu and openSuSE. Similar distributions may work as well. That should include RedHat, CentOS, Debian and SLES.

Other distributions may inherit from these examples.

If you are planning to use Icinga without IDOUtils please read “Icinga Quickstart” instead!

What You'll End Up With

If you follow these instructions, here's what you'll end up with:

Prerequisites

During portions of the installation you'll need to have root access to your machine.

Make sure you've installed the following packages on your system before continuing. IDOUtils use the libdbi and the libdbi-drivers for several databases. The development libraries are also required. The following examples will show how to install the IDOUtils with the libdbi using MySQL or Postgresql.

You can install these packages by running the following commands (as root or sudo):

Fedora/RHEL/CentOS:

# yum install httpd gcc glibc glibc-common gd gd-devel

MySQL:

# yum install mysql mysql-server libdbi libdbi-devel libdbi-drivers libdbi-dbd-mysql

PostgreSQL:

# yum install postgresql postgresql-server libdbi libdbi-devel libdbi-drivers libdbi-dbd-pgsql

Ubuntu

# apt-get install apache2 build-essential libgd2-xpm-dev

MySQL:

# apt-get install mysql mysql-libdbi0 libdbi0-dev libdbd-mysql

PostgreSQL:

# apt-get install postgresql libdbi0 libdbi0-dev libdbd-pgsql

Create Account Information

Become the root user.

# su -l

Create a new Icinga user account and give it a password.

# /usr/sbin/useradd -m icinga 
# passwd icinga 

On some distributions you'll need to add the group in a single step:

# /usr/sbin/groupadd icinga

Download Icinga and the Plugins

Change to your local source directory i.e. /usr/src

# cd /usr/src

Either fetch the actual icinga-core snapshot from Icinga GIT

# git clone git://git.icinga.org/icinga-core.git  

or from the Icinga Website . Don't forget to download the Nagios Plugins

Compile and Install Icinga with IDOUtils

Extract the Icinga source code tarball (or change directory to the GIT snapshot)

# cd /usr/src/ 
# tar xvzf icinga-0.8.4.tar.gz 
# cd icinga-0.8.4

Run the Icinga configure script and enable IDOUtils. You will get help by using the --help flag:

# ./configure --enable-idoutils

Compile the Icinga source code. There is also an extra option for IDOUtils (make idoutils) if you need to recompile only this module. To see available options, only use "make".

# make all

Install binaries, init script, sample config files and set permissions on the external command directory. Also install the IDOUtils.

# make install 
# make install-init 
# make install-config 
# make install-commandmode 
# make install-idoutils 

or shorter

# make fullinstall

Don't start Icinga yet - there's still more that needs to be done...

Customize Configuration

Sample configuration files have been installed by using make install-config into /usr/local/icinga/etc/. You'll need to make just one change before you proceed...

Edit the /usr/local/icinga/etc/objects/contacts.cfg config file with your favourite editor and change the email address associated with the icingaadmin contact definition to the address you'd like to use for receiving alerts.

# vi /usr/local/icinga/etc/objects/contacts.cfg
# cd /usr/local/icinga/etc/
# cp idomod.cfg-sample idomod.cfg
# cp ido2db.cfg-sample ido2db.cfg

Enable the idomod event broker module.

Search for broker_module and uncomment the example or edit it matching your filenames in:

# vi /usr/local/icinga/etc/icinga.cfg

Create Database, User, Grants in MySQL:

# mysql -u root -p

mysql> CREATE DATABASE icinga;

GRANT USAGE ON *.* TO 'icinga'@'localhost' IDENTIFIED BY 'icinga' WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0;

GRANT SELECT , INSERT , UPDATE , DELETE ON icinga.* TO 'icinga'@'localhost';

FLUSH PRIVILEGES ;

quit

Import database scheme for MySQL:

# cd /path/to/icinga-src/module/idoutils/db 
# mysql -u root -p icinga < mysql.sql

Edit the DB config file to customize IDOUtils

# vi /usr/local/icinga/etc/ido2db.cfg

 db_servertype=mysql
 db_port=3306
 db_user=icinga
 db_pass=icinga

PostgreSQL:Create database and User:

 # su - postgres
 $psql
 postgres=# CREATE USER icingauser;
 postgres=# ALTER USER icingauser WITH PASSWORD 'icingauser';
 postgres=# CREATE DATABASE icinga;
 

Debian:

# vi /etc/postgresql/8.x/main/pg_hba.conf

Fedora/RHEL/CentOS:

# vi /var/lib/pgsql/data/pg_hba.conf

Edit the config as follows (local user must be trusted)

#icinga
 local icinga icingauser trust

Reload and configure database scheme.

# /etc/init.d/postgresql-8.x reload
# cd /path/to/icinga-src/module/idoutils/db
# psql -U icingauser -d icinga < pgsql.sql

Edit the DB config file to customize IDOUtils

# vi /usr/local/icinga/etc/ido2db.cfg
 db_servertype=pgsql
 db_port=5432
 db_user=icingauser
 db_pass=icingauser

Configure the Web Interface

Install the Icinga web config file in the Apache conf.d directory.

# make install-webconf

Create an icingaadmin account for logging into the Icinga web interface. Remember the password you assign to this account - you'll need it later.

# htpasswd -c /usr/local/icinga/etc/htpasswd.users icingaadmin

To change the password of an existing user or to add a new user, take this command:

# htpasswd /usr/local/icinga/etc/htpasswd.users <USERNAME>
[Note] Note

Depending on your distribution/Apache-version you may have to use htpasswd2 instead.

Reload/Restart Apache to make the new settings take effect.

Fedora/RHEL/CentOS

# service httpd restart

Ubuntu / openSuSE

# /etc/init.d/apache2 reload

Compile and Install the Nagios Plugins

Extract the Nagios plugins source code tarball.

# cd /usr/src 
# tar xvzf nagios-plugins-1.4.13.tar.gz 
# cd nagios-plugins-1.4.13  

Compile and install the plugins by changing install directory to /usr/local/icinga

# ./configure --prefix=/usr/local/icinga --with-nagios-user=icinga 
# make 
# make install 

Start IDOUtils and Icinga

Start IDOUtils

IDOUtils must be started and running before Icinga is started.

Start IDOUtils

# /etc/init.d/ido2db start

Stop IDOUtils

# /etc/init.d/ido2db stop

Verify the sample Icinga configuration files.

 #/usr/local/icinga/bin/icinga -v /usr/local/icinga/etc/icinga.cfg 

If there are no errors, start Icinga.

Fedora /RHEL/CentOS

service icinga start

Ubuntu/openSuSE

# /etc/init.d/icinga start

Configure Icinga Startup

Add Icinga to the list of system services and have it automatically start when the system boots (make sure you have installed the init script before).

Fedora /RHEL/CentOS/openSuSE

# chkconfig --add icinga chkconfig icinga on

Ubuntu

# ln -s /etc/init.d/icinga /etc/rcS.d/S99icinga

Login to the Web Interface

You should now be able to access the Icinga web interface at the URL below. You'll be prompted for the username ( icingaadmin ) and password you specified earlier.

 http://localhost/icinga/

or

 http://yourdomain.com/icinga/ 

Click on the "Service Detail" navbar link to see details of what's being monitored on your local machine. It will take a few minutes for Icinga to check all the services associated with your machine.

Other Modifications

Make sure your system's firewall rules are configured to allow access to the web server if you want to access the Icinga interface remotely.

# iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT

Setting up your mail transfer agent (MTA) like exim, sendmail or postfix to allow Icinga sending notification emails won't be explained here. Please refer to the Nagios Wiki for more resources.

There are several tweaks for the IDOUtils (former NDOUtils of Nagios) available.

You're Done

Congratulations! You successfully installed Icinga with IDOUtils. Your journey into monitoring has just begun. You'll no doubt want to monitor more than just your local machine, so check out the chapter on "Getting Started" about "Monitoring ..."