cluster names with - cause ansible warnings

[sjpb]

cluster name is used to generate group names, and these raise a warning if these have a dash in them:

[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details

From https://docs.ansible.com/ansible/latest/inventory_guide/intro_inventory.html#inventory-basics-formats-hosts-and-groups

Group names should follow the same guidelines as Creating valid variable names.

the actual error is hard to find!

Could just add validation for this?

[priteau]

You can also ignore it using ansible.cfg:

[defaults]
force_valid_group_names = ignore

[sjpb]

Interesting. Seems odd that if it is actually "invalid" you can supress the warning. I can't find out what is actually problematic about such invalid group names.

[priteau]

There is some context about the reasons for raising a warning here: ansible/ansible-documentation#89 (comment)

There are a lot of people using dynamic inventories from EC2 which includes hyphens in instance and region names, so my understanding is that compatibility is going to stay.

However, since we mostly control the groups in the appliance, we could make sure to avoid using invalid characters completely.