Amazon’s Elastic Compute Cloud (EC2) has the goal of providing flexible computing capacity in the form of a service. This service provides the user with the ability to quickly scale to the demands of an application by booting or shutting down servers in a matter of minutes. Since all these machines run in a virtual environment, you only need to pay for the resources you use. More detailed information can be found on Amazon’s EC2 home page - http://aws.amazon.com/ec2/ Much of the documentation provided by Amazon was straightforward and easy to follow so for a full walk-through see http://docs.amazonwebservices.com/AWSEC2/2007-08-29/GettingStartedGuide/. We will assume that the reader is familiar the basics of EC2.
This article focuses on the problematic aspects of EC2 - issues that can lead to serious problems or technicalities that if ignored, can lead to frustrating hours wasted on troubleshooting and debugging. We've learned that the single most important thing you can do for your EC2 environment is to give it a dynamic DNS solution it can use to overcome the DHCP nature of virtual machines. Now what can you do for yourself, you ask? Take a look at the gotchas we encountered and save yourself from dealing with the same problems.
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