Warn users that the `k8s_info` module was `k8s_facts` before Ansible 2.9

[nejch]

Thanks a lot for the great read! I'm not sure if this should be in the scope of the book, since this might be an issue with other modules as well, but just thought I'd mention it. Chapter 4 uses the k8s_info module to gather service facts, which was called k8s_facts before Ansible 2.9.

I'm executing the playbooks from a repo with GitLab CI rather than locally, using the ansible/ansible-runner:latest image from https://hub.docker.com/r/ansible/ansible-runner. I'm not sure this is the greatest idea (I thought I'd eventually use the added runner capabilities), but anyway - the latest runner image is currently still at Ansible 2.8 - so the deployment test in Chapter 4 was failing with ERROR! no action detected in task.

[bmillemathias-1a]

Chapter 4 uses the k8s_info module to gather service facts, which was called k8s_facts before Ansible 2.9.

If I remember correctly the text states as the beginning the code was made against ansible 2.9.x so that implicitly tells that other version are likely not to work out-the-box.

[geerlingguy]

@bmillemathias-1a - True, however I still have some references to changes which occurred in Ansible 1.9, 2.0, 2.4, etc. in my Ansible for DevOps book... so it can't hurt to be clear in areas where people get tripped up like @nejch did :)

I'll definitely add a note somewhere around the first time I start using the module.

[geerlingguy]

I have added an info box after the first use of k8s_info in chapter 4 with a note about using k8s_facts if using Ansible 2.8 or earlier. Thanks again for mentioning this!

The fix will be in the next version of the book.