1: Containers from 30,000 feet

Containers have taken over the world!

In this chapter, you’ll learn why we have containers, what they do for us, and where we can use them.

The bad old days

Applications are the powerhouse of every modern business. When applications break, businesses break.

Most applications run on servers, and in the past, we were limited to running one application per server. As a result, the story went something like this:

Every time a business needed a new application, it had to buy a new server. Unfortunately, we weren’t very good at modeling the performance requirements of new applications, and the IT departments had to guess. This often resulted in businesses buying very expensive servers with a lot more performance capability ...

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