Installing Splunk on CentOS 5.5

I started by installing two fresh copies of CentOS 5.5 on two different VM’s in VirtualBox. The configuration I chose was: 512MB RAM with 2 CPU cores and they were both identical.

Fig. 1 – VM Snapshot.

Fig. 2 – For the purpose of this tutorial we called the server machine “server1”.

Step 1: Go to and download splunk-5.0.2-149561-linux-2.6-x86_64.rpm or whatever the latest version of Splunk is after you sign up for an account.

Fig 3 – Downloading the rpm file with wget

Step 2: Install splunk using: rpm –I splunk-5.0.2.rpm

Fig 4 – Splunk installation

Step 3: Start splunk using: /opt/splunk/bin/splunk start and on the first run you have to agree to the license.

Fig 5 – Splunk starting and adding to boot

Step 4: Allow port 8000 and 8089 through iptables

Fig 6 – iptables

Step 5: Go to web interface and login with default user/password and change password.

Fig 7 – Splunk welcome page

Go to Launch search app.

Click A file or directory of files

Consume any file on the splunk server

Skip preview

And as path to your data I used /var/log/

This is the configuration to handle local logs

Step 6: Enable receiving on Splunk server

Fig 8 – Enabled receiving on port 9997 and configured iptables

Installing Splunk Universal Forwarder on CentOS 5.5

We moved to server2 to install Splunk Universal Forwarder.

Step 1: Download Splunk Forwarder from

Fig 1 – Downloading Universal Forwarder

Step 2: Start Universal Forwarder using /opt/splunkforwarder/bin/splunk start

First time you will have to agree to the license.

Fig 2 – Starting Universal Forwarder and enabled start at boot

Step 3: Add your index server with /opt/splunkforwarder/bin/splunk add forward-server (where = server1 )

Fig 3 – Adding forward-server and monitor

Now if you go back to http://server1:8000 and login and go to Launch search app you should have the log files indexed from server1 and server2 like in the next screenshot.

Good luck.






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