If you get the above error when you try running
ansible-playbook -i inventory/hosts setup.yml --tags=setup-system-user
Check and verify that you have [matrix_servers] in your inventory/hosts file
That file should contain the following.
[matrix_servers] matrix. ansible_host= ansible_ssh_user=root
Windows has a similar file like the Linux /etc/hosts file. It is located in
Windows\System32\drivers\etc\hosts
You’ll need to have administrator privileges to modify the file. So you can launch notepad as Administrator then open the file. If you don’t see the file make sure the drop down across from “File name:” is set to “All Files”.
You can add entry’s just like you would on Linux
192.168.22.12 hostname