Ansible conditionals using When & Register
I'll show you how to use some basic but powerful conditional statements to control when a task runs in this demo.
This is what's covered:
• I’ll be using 2 servers today. 1 centos 8 and one ubuntu 20.04
• I’ll use the fact: "ansible_os_family" to only create a file on a Debian based server
• Next we’ll run a command to get the AWS Instance type of each node.
• If the server is a T2.small, we’ll create a file, otherwise, ignore it.
• To do this we’ll use "register" to collect the output of the command
• Then use “when:” to only run the task if it’s a T2.small.
• Finally we’ll reverse the conditional
Once you understand conditionals, adapt my examples on your own code and see how much of a difference it gives you.
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