Using search to find nodes
If you are running your infrastructure in any type of virtualized environment, such as a public or private cloud, the server instances that you use will change frequently. Instead of having a well-known set of servers, you destroy and create virtual servers regularly.
In this situation, your cookbooks cannot rely on hardcoded server names when you need a list of available servers.
Chef provides a way to find nodes by their attributes, for example, their roles. In this section, we'll see how you can retrieve a set of nodes to use them in your recipes.
Getting ready
Make sure that you have a cookbook called my_cookbook, as described in the Creating and using cookbooks section in Chapter 1, Chef Infrastructure.
How to do it... ...
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