Knife, the command-line client for the Chef Server, has a plugin system. This plugin system enables us to extend the functionality of Knife in any way we need it. The
knife-ec2 plugin is a common example: it adds commands such as
ec2 server create to Knife.
In this section, we will create a very basic custom Knife plugin to learn about all the required building blocks of Knife plugins. As Knife plugins are pure Ruby programs, which can use any external libraries, there are no limits for what you can make Knife do. This freedom enables you to build your whole DevOps workflow on Knife, if you want to.
Now, let's teach Knife to tweet in your name!
Make sure you have a Twitter user account and you have created ...