Developers guide

Chapter 8

Operating System Best Practices 67

∏ pf2 is the second PacketFence server

∏ PacketFence is properly configured on each server

∏ the DRBD partition is 30G long

∏ we use HeartBeat v1

Creation of the DRBD partition

During the OS installation, reduce the size of the main partition and create a new one (that will be used

for the replicated MySQL database) of 30G. In order to do so, on VolGroup00:

∏ leave at least 30G of drive space for a new partition. Do not create that partition during the install

process, we will do it later.

Partitioning

After the install, you need to create the extra partition for drbd. Using fdisk, create you new partition and

save the table. You will probably need to reboot your server after this step.

DRBD and Linux-HA Installation

CentOS 6

Download the drbd-8.3 and drbd-kmdl-*-8.3 RPMs from http://dl.atrpms.net/el6-x86_64/atrpms/stable/

(for 64bit) or http://dl.atrpms.net/el6-386/atrpms/stable/ (for 32bit).

Use the following line to install the required packages.

yum install ./drbd*.rpm heartbeat heartbeat-pils heartbeat-stonith

DRBD Configuration and setup

Caution

Initializing, configuring and troubleshooting DRBD is not straight forward! We strongly

recommend that you read the online documentation available on DRBD website so you

have a better idea about how it works.

Here we assume the name of the partition is mysql.

Load the DRBD kernel module:

modprobe drbd

Edit /etc/drbd.conf and put the following content: