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CHAPTER 7
Creating an Open Source SAN
Configuring a DRBD and
Heartbeat on Ubuntu Server
In a modern network, a shared storage solution is indispensable. Using shared storage
means that you can make your server more redundant. Data is stored on the shared
storage, and the servers in the network simply access this shared storage. To prevent
the shared storage from becoming a single point of failure, mirroring is normally
applied. That means that the shared storage solution is configured on two servers: if
one goes down, the other takes over. To implement such a shared storage solution,
some people spend thousands of dollars on a proprietary storage area network (SAN)
solution. That isn’t necessary. In this chapter you will learn how to create a shared stor-
age solution using two server machines and Ubuntu Server software, what I refer to as
an open source SAN.
There are three software components that you’ll need to create an open source SAN:
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