This guide will show you how to perform an Observium installation on an CentOS/RHEL/Scientific Linux (referred to collectively as Enterprise Linux or EL) release 6 system.
Enterprise Linux 7
This guide was written for Enterprise Linux 6. There is another installation guide for Enterprise Linux 7. We strongly recommend running Observium on the most recent release of your chosen distribution.
In this example, we use a clean installation of EL.
For more extended packagelist, we first install the RPM Forge and EPEL repositories:
rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt rpm -Uvh http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt rpm -Uvh http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.3-1.el6.rf.i386.rpm rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
EL release 4 and 5 are explicitly unsupported by Observium due to incompatibilities with their old packages.
Now let's install the needed packages for Observium:
yum install wget.x86_64 httpd.x86_64 php.x86_64 php-mysql.x86_64 php-gd.x86_64 php-posix.x86_64 \ php-mcrypt.x86_64 php-pear.noarch vixie-cron.x86_64 net-snmp.x86_64 net-snmp-utils.x86_64 fping.x86_64 \ mysql-server.x86_64 mysql.x86_64 MySQL-python.x86_64 rrdtool.x86_64 subversion.x86_64 jwhois.x86_64 \ ipmitool.x86_64 graphviz.x86_64 ImageMagick.x86_64
yum install wget httpd php php-mysql php-gd php-posix php-mcrypt php-pear php-pear.noarch \ vixie-cron net-snmp net-snmp-utils fping mysql-server mysql MySQL-python rrdtool subversion \ jwhois ipmitool graphviz ImageMagick
If you want to be able to monitor libvirt virtual machines, install libvirt:
yum install libvirt
First, create a directory for Observium to live in:
mkdir -p /opt/observium && cd /opt
Observium comes in two editions, an Open Source Community Edition released on a 6 month cycle, and a Subscription Edition with additional features, rapid bug fixes and feature improvements on a daily basis and an easy to use SVN-based update mechanism.
Observium Community Edition
If you would like to install the Community Edition, please install using the most recent .tar.gz release.
Download the latest .tar.gz of Observium and unpack:
wget http://www.observium.org/observium-community-latest.tar.gz tar zxvf observium-community-latest.tar.gz
Observium Subscription Edition
If you have a valid Observium subscription, please use one of the automated SVN release repositories.
We recommend the
stable train for people who intend to use automated updates to keep their Observium installation up to date.
svn co https://svn.observium.org/svn/observium/trunk observium
svn co https://svn.observium.org/svn/observium/branches/stable observium
Change into the new install directory:
Copy the default configuration file and edit it for your system:
cp config.php.default config.php
Edit config.php. Change the options to reflect your installation.
You must change the MySQL username and password. Most other settings can be left as default.
Create the MySQL database:
mysql -u root -p <mysql root password> mysql> CREATE DATABASE observium DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci; mysql> GRANT ALL PRIVILEGES ON observium.* TO 'observium'@'localhost' -> IDENTIFIED BY '<observium db password>';
Disable strict mode
MySQL STRICT mode
Before proceeding of further actions, make sure that you have not enabled STRICT mode in MySQL server (in MySQL 5.7 it enabled by default).
Skip this step for latest Pro editions (since revision 7766)
Since revision 7766 (version 0.16.4.7766) notes about STRICT sql mode not relevant.
STRICT_TRANS_TABLES not exist in MySQL modes list:
mysql> SELECT @@GLOBAL.sql_mode; +--------------------------------------------+ | @@GLOBAL.sql_mode | +--------------------------------------------+ | STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION | +--------------------------------------------+
If you see
STRICT_TRANS_TABLES in modes list, make the following changes in the "my.ini/my.cnf":
- Look for the following line:
sql-mode = "STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
- Change it to (blank):
- Restart the MySQL service.
For more details on Strict SQL Mode you may refer - http://dev.mysql.com/doc/refman/5.7/en/sql-mode.html#sql-mode-strict
Setup the MySQL database and insert the default schema:
Old Observium editions
If your current edition does not support
-u argument, than this is time to upgrade your install.
But still, you can use the old way of DB schema install/update:
It is OK to have some errors in the SQL revisions
Enterprise Linux Specifics
Explaining SELinux and how to make Observium work within it is beyond the scope of this guide, so we will disable it. If you are competent enough to maintain SELinux, then that is possible too, but is an even more unsupported configuration than RHEL/CentOS themselves.
Firstly, disable SELinux. You can do this temporarily with the following command:
We need to disable SELinux permanently, so you also need to change
/etc/selinux/config so that the
SELINUX option is set to permissive
Add an entry for
config.php as the location is different on RHEL:
$config['fping'] = "/usr/sbin/fping";
Create the directory Observium will store its logs in:
Alternatively you can create a directory somewhere else and point the log_dir directive in the configuration to that directory.
Create the rrd directory to store RRDs in:
mkdir rrd chown apache:apache rrd
If the server will be running only Observium, change /etc/httpd/conf/httpd.conf default to :
<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 </Directory> </VirtualHost>
Create logs directory for apache
mkdir /opt/observium/logs chown apache:apache /opt/observium/logs
Add a first user, use level of 10 for admin:
cd /opt/observium ./adduser.php <username> <password> <level>
Add a first device to monitor:
./add_device.php <hostname> <community> v2c
Do an initial discovery and polling run to populate the data for the new device:
./discovery.php -h all ./poller.php -h all
Add cron jobs, create a new file
/etc/cron.d/observium with the following contents:
The below example includes a username, so will only work in /etc/crontab or /etc/cron.d/observium. It will NOT work in a user crontab edited with crontab -e without removing the username.
# Run a complete discovery of all devices once every 6 hours 33 */6 * * * root /opt/observium/discovery.php -h all >> /dev/null 2>&1 # Run automated discovery of newly added devices every 5 minutes */5 * * * * root /opt/observium/discovery.php -h new >> /dev/null 2>&1 # Run multithreaded poller wrapper every 5 minutes */5 * * * * root /opt/observium/poller-wrapper.py 8 >> /dev/null 2>&1 # Run housekeeping script daily for syslog, eventlog and alert log 13 5 * * * root /opt/observium/housekeeping.php -ysel # Run housekeeping script daily for rrds, ports, orphaned entries in the database and performance data 47 4 * * * root /opt/observium/housekeeping.php -yrptb
And reload the cron process:
Please note running four poller instances is good for initial testing, but do check the [[Performance tuning]] page for further performance enhancing options once you get going.
You should now be able to see http://
If everything works, let's set the httpd and mysqld to startup when we reboot the server:
chkconfig mysqld on chkconfig httpd on
Updating Observium has been designed to be as quick and painless as possible. Using our SVN delivery mechanism, it can even be automated. Because we have a rapid development and model, we recommend that you update frequently, at least once per month, though once or twice per week is better and many users update daily via an automated CRON job.
See Updating the Subscription Edition for a short explanation on how to update the Subscription Edition of Observium.
When running eg. poller.php or discovery.php a lot of notices regarding undefined indexes, variables and offsets. To hide these notices you can do the following:
Find the line containing:
error_reporting = E_ALL & ~E_DEPRECATED
Change this to:
error_reporting = E_ALL & ~E_NOTICE