Observium: A Complete Network Management and Monitoring System for RHEL/CentOS

Observium is a PHP/MySQL driven Network Observation and Monitoring application, that supports a wide range of operating systems/hardware platforms including, Linux, Windows, FreeBSD, Cisco, HP, Dell, NetApp and many more. It seeks to present a robust and simple web interface to monitor health and performance of your network.

Install Observium in CentOS
Install Observium in CentOS/RHEL

Observium gathers data from devices with the help of SNMP and display those data in graphical pattern via a web interface. It makes hefty use of the RRDtool package. It has a number of thin core design goals, which includes collecting as much historical information about devices, being totally auto-discovered with slight or no manual interruption, and having a very simple yet powerful interface.

Observium Demo

Please have a quick online demo of the Observium deployed by the developer at the following location.

  1. http://demo.observium.org/

This article will guide you on how to install Observium on RHEL, CentOS and Scientific Linux, the supported version is EL (Enterprise Linux) 6.x. Currently, Observium unsupported for EL release 4 and 5 respectively. So, please don’t use following instructions on these releases.

Step 1: Adding RPM Forge and EPEL Repositories

RPMForge and EPEL is a repository that provides many add-on rpm software packages for RHEL, CentOS and Scientific Linux. Let’s install and enable these two community based repositories using the following serious of commands.

On i386 Systems
# yum install wget
# wget http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el5.rf.i386.rpm
# wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
# wget http://apt.sw.be/RPM-GPG-KEY.dag.txt
# rpm --import RPM-GPG-KEY.dag.txt
# rpm -Uvh rpmforge-release-0.5.3-1.el5.rf.i386.rpm
# rpm -Uvh epel-release-6-8.noarch.rpm
On x86_64 Systems
# yum install wget
# wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.rpm
# wget http://epel.mirror.net.in/epel/6/x86_64/epel-release-6-8.noarch.rpm
# wget http://apt.sw.be/RPM-GPG-KEY.dag.txt
# rpm --import RPM-GPG-KEY.dag.txt
# rpm -Uvh rpmforge-release-0.5.2-2.el6.rf.rpm
# rpm -Uvh epel-release-6-8.noarch.rpm
Install RPMForge Repository
Install RPMForge Repository
Install EPEL Repository
Install EPEL Repository
Installing Repositories
Installing Repositories

Step 2: Install Needed Software Packages

Now let’s install the required software packages needed for Observium.

# yum install httpd php php-mysql php-gd php-snmp vixie-cron php-mcrypt \
php-pear net-snmp net-snmp-utils graphviz subversion mysql-server mysql rrdtool \
fping ImageMagick jwhois nmap ipmitool php-pear.noarch MySQL-python
Install Needed Packages
Install Needed Packages

If you wish to monitor virtual machines, please install ‘libvirt‘ package.

# yum install libvirt

Step 3: Downloading Observium

For your information, Observium has two following editions

  1. Community/Open Source Edition: This edition is freely available for download with less features and few security fixes.
  2. Subscription Edition: This edition is comes with additional features, rapid feature/fixes, hardware support and easy to use SVN-based release mechanism.

Firstly navigate to the /opt directly, here we will going to install Observium as default. If you wish to install somewhere else, please modify commands and configuration accordingly. We strongly suggest you to first deploy under /opt directory. Once you verify that everything works perfectly, you can install at your desired location.

If you have a active Observium subscription, you can use SVN repositories to download most recent version. A valid subscription account only valid for a single installation and two testing or development installations with daily security patches, new features and bug fixes.

To download most recent stable and current version of Observium, you need to have a svn package installed on the system, in order to pull the files from the SVN repository.

# yum install svn
Development Version
# svn co http://svn.observium.org/svn/observium/trunk observium
Stable Version
# svn co http://svn.observium.org/svn/observium/branches/stable observium

We don’t have a valid subscription, So we we are going to try out Observium using the Community/Open Source Edition. Download the latest ‘observium-community-latest.tar.gz’ stable version and unpack it as shown.

# cd /opt
# wget http://www.observium.org/observium-community-latest.tar.gz
# tar zxvf observium-community-latest.tar.gz
Download Observium Community Edition
Download Observium Community Edition

Step 4: Creating Observium MySQL Database

This is a clean installation of MySQL. So, we are going to set a new root password with the help of following command.

# service mysqld start
# /usr/bin/mysqladmin -u root password 'yourmysqlpassword'

Now login into mysql shell and create the new Observium database.

# mysql -u root -p

mysql> CREATE DATABASE observium;
mysql> GRANT ALL PRIVILEGES ON observium.* TO 'observium'@'localhost' IDENTIFIED BY 'dbpassword';

Step 5: Configure Observium

Configuring SELinux to work with Observium is beyond the scope of this article, so we disabled SELinux. If you are familiar with SELinux rules, then you can configure it, but no guarantee that the Observium work with active SELinux. So, better disable it permanently. To do, open ‘/etc/sysconfig/selinux‘ file and change the option from ‘permissive‘ to ‘disabled‘.

# vi /etc/sysconfig/selinux

Copy the default configuration file ‘config.php.default‘ to ‘config.php‘ and modify the settings as shown.

# /opt/observium
# cp config.php.default config.php

Now open ‘config.php‘ file and enter MySQL details such as database name, username and password.

# vi config.php
// Database config
$config['db_host'] = 'localhost';
$config['db_user'] = 'observium';
$config['db_pass'] = 'dbpassword';
$config['db_name'] = 'observium';

Then add an entry for fping binary location to config.php. In RHEL distribution the location is different.

$config['fping'] = "/usr/sbin/fping";
Enter MySQL Settings
Enter MySQL Settings

Next, run the following command to setup the MySQL database and insert the database default file schema.

# php includes/update/update.php
Insert Observium Database Schema
Insert Observium Database Schema

Step 6: Configure Apache for Observium

Now create a ‘rrd‘ directory under ‘/opt/observium‘ directory for storing RRD’s.

# /opt/observium
# mkdir rrd

Next, grant Apache ownership to ‘rrd‘ directory to write and store RRD’s under this directory.

# chown apache:apache rrd

Create a Apache Virtual Host directive for Obervium in ‘/etc/httpd/conf/httpd.conf‘ file.

# vi /etc/httpd/conf/httpd.conf

Add the following Virtual Host directive at the bottom of the file and enable Virtualhost section as shown in the screenshot below.

<VirtualHost *:80>
  DocumentRoot /opt/observium/html/
  ServerName  observium.domain.com
  CustomLog /opt/observium/logs/access_log combined
  ErrorLog /opt/observium/logs/error_log
  <Directory "/opt/observium/html/">
  AllowOverride All
  Options FollowSymLinks MultiViews
Create Observium Virtual Host
Create Observium Virtual Host

To maintain observium logs, create a ‘logs‘ directory for Apache under ‘/op/observium‘ and apply Apache ownership to write logs.

# mkdir /opt/observium/logs
# chown apache:apache /opt/observium/logs

After all settings, restart Apache service.

# service httpd restart

Step 7: Create Observium Admin User

Add a first user, give level of 10 for admin. Make sure to replace username and password with your choice.

# cd /opt/observium
# ./adduser.php tecmint tecmint123 10

User tecmint added successfully.

Next add a New Device and run following commands to populate the data for new device.

# ./add_device.php <hostname> <community> v2c
# ./discovery.php -h all
# ./poller.php -h all
Populate Observium Data
Populate Observium Data

Next set a cron jobs, create a new file ‘/etc/cron.d/observium‘ and add the following contents.

33  */6   * * *   root    /opt/observium/discovery.php -h all >> /dev/null 2>&1
*/5 *      * * *   root    /opt/observium/discovery.php -h new >> /dev/null 2>&1
*/5 *      * * *   root    /opt/observium/poller-wrapper.py 1 >> /dev/null 2>&1

Reload cron process to take new entries.

# /etc/init.d/cron reload

The final step is to add httpd and mysqld services system-wide, to automatically start after system boot.

# chkconfig mysqld on
# chkconfig httpd on

Finally, open your favourite browser and point to http://Your-Ip-Address.

Observium Login Screen
Observium Login Screen
Observium Dashboard
Observium Dashboard

Observium Screenshot Tour

Following are the screen grabs of last mid-2013, taken from the Observium website. For up-to-date view, please check live demo.

Complete System Information
Complete System Information
Load Average Graphs
Load Average Graphs
Historical Usage Overview
Historical Usage Overview
CPU Frequency Monitoring
CPU Frequency Monitoring


Observium doesn’t mean to completely remove other monitoring tools such as Nagios or Cacti, but rather to addition them with terrific understanding of certain devices. For this reason, its important to deploy Observium with Naigos or other monitoring systems to provide alerting and Cacti to produce customized graphing of your network devices.

Reference Links:

  1. Observium Homepage
  2. Observium Documentation

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43 thoughts on “Observium: A Complete Network Management and Monitoring System for RHEL/CentOS”

  1. This is error i have facing …

    [[email protected] observium]# ./add_device.php sriram.galaxy.local sriram v2c
    Observium v0.14.4.5229
    Add Device(s)

    Try to add sriram.galaxy.local:
    Could not resolve sriram.galaxy.local.
    Devices skipped: 1.

    add_device.php [community] [v1|v2c] [port] [udp|udp6|tcp|tcp6]
    add_device.php [any|nanp|anp|ap] [v3] [user] [password] [enckey] [md5|sha] [aes|des] [port] [udp|udp6|tcp|tcp6]

    SNMPv1/2c: add_device.php [community] [v1|v2c] [port] [udp|udp6|tcp|tcp6]
    SNMPv3 : Defaults : add_device.php any v3 [user] [port] [udp|udp6|tcp|tcp6]
    No Auth, No Priv : add_device.php nanp v3 [user] [port] [udp|udp6|tcp|tcp6]
    Auth, No Priv : add_device.php anp v3 [md5|sha] [port] [udp|udp6|tcp|tcp6]
    Auth, Priv : add_device.php ap v3 [md5|sha] [aes|des] [port] [udp|udp6|tcp|tcp6]
    FILE : add_device.php

    To add multiple devices, create a file in which each line contains one device with or without options.
    Format for device options, the same as specified in USAGE.

  2. hi im very new to observium.. i have some doubts on if observium can manage with only manageable switches like cisco.. because i couldn’t find any host in my network.. im using range of IP. i dont have manageable switch.. i confiugred observium i can logoin.. how to find other hosts in my network..

  3. I followed this tut to the “T” and everything works great except that I can’t access the server from a remote computer on the same LAN using the IP address of the server. While on the server http://localhost or http:// gets me there but from a remote computer http:// does not get me there. I can ping the address just fine.

    Any ideas?

  4. Hi Ravi
    i successfully added remote hosts to observium ,but memory,storage graphs shows error drawing graph and i added oneday back still shoeing this error msg

    Device not yet polled

    This device has not yet been successfully polled. System information and statistics will not be populated and graphs will not draw.
    Please wait 5-10 minutes for graphs to draw correctly.
    Device not yet discovered

    This device has not yet been successfully discovered. System information and statistics will not be populated and graphs will not draw.
    This device should be automatically discovered within 10 minutes.

    • Yeah that’s great you’ve successfully added remote host to Observium, it would be great if you could share the docs for adding remote hosts so others can benefit from your instructions. Can you share the screeshot for the same, so it will helpful me to trace the problem.

  5. Hi Ravi Thanks For the reply

    i hv installed needed step:2 packages on remote machine and yum install libvirt

    but still getting same problem and iam working on vmplayer centos 6.5 machine with etherner br0 device

    [[email protected] ~]# tail -f /var/log/messages
    Jul 3 03:12:55 observium kernel: br0: port 1(eth0) entering forwarding state
    Jul 3 03:12:57 observium polkitd[2255]: started daemon version 0.96 using authority implementat ion `local’ version `0.96′
    Jul 3 03:12:58 observium rtkit-daemon[2264]: Sucessfully made thread 2262 of process 2262 (/usr /bin/pulseaudio) owned by ’42’ high priority at nice level -11.
    Jul 3 03:12:58 observium pulseaudio[2262]: alsa-util.c: Disabling timer-based scheduling becaus e running inside a VM.
    Jul 3 03:12:58 observium rtkit-daemon[2264]: Sucessfully made thread 2270 of process 2262 (/usr /bin/pulseaudio) owned by ’42’ RT at priority 5.
    Jul 3 03:12:58 observium pulseaudio[2262]: alsa-util.c: Disabling timer-based scheduling becaus e running inside a VM.
    Jul 3 03:12:58 observium rtkit-daemon[2264]: Sucessfully made thread 2271 of process 2262 (/usr /bin/pulseaudio) owned by ’42’ RT at priority 5.
    Jul 3 03:12:58 observium pulseaudio[2262]: alsa-source.c: ALSA woke us up to read new data from the device, but there was actually nothing to read!
    Jul 3 03:12:58 observium pulseaudio[2262]: alsa-source.c: Most likely this is a bug in the ALSA driver ‘snd_ens1371’. Please report this issue to the ALSA developers.
    Jul 3 03:12:58 observium pulseaudio[2262]: alsa-source.c: We were woken up with POLLIN set — h owever a subsequent snd_pcm_avail() returned 0 or another value < min_avail.

  6. hi ravi
    when i try to add hostname am getting this issue pls help me

    [[email protected] observium]# ./add_device.php test.centos.com public v2c
    Observium v0.14.4.5229
    Add Device(s)

    Try to add test.centos.com:
    Trying v2c community public …
    No reply on community public using v2c.
    Could not reach test.centos.com with given SNMP community using v2c.
    Devices skipped: 1.


    [[email protected] ~]# tail -f /var/log/messages
    Jul 2 05:28:59 Test snmpd[4200]: net-snmp: 2 error(s) in config file(s)
    Jul 2 05:28:59 Test snmpd[4203]: NET-SNMP version 5.5
    Jul 2 05:29:56 Test snmpd[4203]: Received TERM or STOP signal… shutting down …
    Jul 2 05:29:56 Test snmpd[4223]: /etc/snmp/snmpd.conf: line 93: Error: bad secu rity level (noauthnopriv, authnopriv, authpriv)
    Jul 2 05:29:56 Test snmpd[4223]: /etc/snmp/snmpd.conf: line 94: Error: bad secu rity level (noauthnopriv, authnopriv, authpriv)
    Jul 2 05:29:56 Test snmpd[4223]: net-snmp: 2 error(s) in config file(s)
    Jul 2 05:29:56 Test snmpd[4226]: NET-SNMP version 5.5
    Jul 2 06:47:45 Test snmpd[4226]: Received TERM or STOP signal… shutting down …
    Jul 2 06:47:45 Test snmpd[4690]: NET-SNMP version 5.5
    Jul 2 22:05:36 Test kernel: hrtimer: interrupt took 11093372 ns

    • You must have SNMP tools installed on remote host and make sure remote and observium server can talk each other.

  7. when I do the php updates command I get this:

    [[email protected] observium]# !30
    php includes/update/update.php
    — Updating database/file schema
    000 -> 001 … (db) done.
    001 -> 002 … (db) done.
    002 -> 003 … (db) done.
    003 -> 004 … (db) done.
    004 -> 005 … (db) done.
    005 -> 006 … (db) done (6 errors).
    006 -> 007 … (db) done (1 errors).
    007 -> 008 … (db) done (1 errors).
    008 -> 009 … (db) done (9 errors).
    009 -> 010 … (db) done (1 errors).
    010 -> 011 … (db) done (1 errors).
    011 -> 012 … (db) done (1 errors).
    012 -> 013 … (db) done (1 errors).
    013 -> 014 … (db) done (2 errors).
    014 -> 015 … (db) done (2 errors).
    015 -> 016 … (db) done (5 errors).
    016 -> 017 … (db) done (1 errors).
    017 -> 018 … (db) done (3 errors).
    018 -> 019 … (db) done (1 errors).
    019 -> 020 … (db) done (6 errors).
    020 -> 021 … (db) done (3 errors).
    021 -> 022 … (db) done (1 errors).
    022 -> 023 … (db) done (5 errors).
    023 -> 024 … (db) done (2 errors).
    024 -> 025 … (db) done (11 errors).
    025 -> 026 … (db) done (1 errors).
    026 -> 027 … (db) done (2 errors).
    027 -> 028 … (db) done (22 errors).
    028 -> 029 … (db) done (1 errors).
    029 -> 030 … (db) done (2 errors).
    030 -> 031 … (db) done (1 errors).
    031 -> 032 … (db) done (2 errors).
    032 -> 033 … (db) done.
    033 -> 034 … (db) done (2 errors).
    034 -> 035 … (db) done (1 errors).
    035 -> 036 … (db) done (1 errors).
    036 -> 037 … (db) done (2 errors).
    037 -> 038 … (db) done (2 errors).
    038 -> 039 … (db) done (1 errors).
    039 -> 040 … (db) done (1 errors).
    040 -> 041 … (db) done (2 errors).
    041 -> 042 … (db) done (5 errors).
    042 -> 043 … (db) done (9 errors).
    043 -> 044 … (db) done (2 errors).
    044 -> 045 … (db) done (4 errors).
    045 -> 046 … (db) done.

    Where are the logs for this…mysql is on a different IP.

    • It’s fine to have such SQL errors in the SQL revisions up to 006. No need to worry about much, just continue installation…


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