Page 73 - Cloud Essentials

load balancers, physical or virtual servers, and networks, to name a few.

The traditional server environment consists of a number of layers of
technology. Virtualization adds a new layer that isolates the software
components of the stack from the hardware layers.

Server Virtualization Server virtualization allows the sharing of
underlying hardware. Multiple virtual machines (VMs) can run concurrently
and independently on the same physical hardware. The VMs can be
powered on, powered off, and rebooted independently of each other. You
can install a different operating system and applications into each separate

VM to create virtual, or “cloud” servers. Figure 3-4 shows four virtual
machines running different operating systems: Windows Server 2003,
Windows Server 2008, Red Hat Enterprise Linux, and OpenSolaris.

FIGURE 3-4 Server virtualization allows multiple VMs to share the same
hardware.

Creating a virtual server in the cloud involves the following steps:

1. Log in to the cloud provider web portal using a management account.

2. Select a virtual machine image or template that defines the operating
system and optionally software applications.
3. Select security credentials for logging into the server that will be
created.

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