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Infrastructure as Code (IAC) Cookbook by Pierre Pomes, Stephane Jourdan

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More dynamic code using notifications

Wouldn't it be great if Chef knew how and what to restart automatically when a change arises? In a previous example, we added a new virtual host to our node, and we had to manually restart Apache to take the change into account. Luckily, there's a mechanism named notifications in Chef, that helps trigger an action, when a resource changes. This way, changing a virtual host can trigger a restart of the Apache HTTP server automatically.

Getting ready

To work through this recipe, you will need the following:

  • A working Chef DK installation on the workstation
  • A working Chef client configuration on the remote host
  • The Chef code from the previous recipes

How to do it…

We'll start from the apache cookbook we've left in its ...

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