Basic Question on Ansible - Creating Nodes

Thanks ArvinF

Even if I explicitly tell the playbook which inventory file I get the same thing:

devlin@ubuntu-v20:~/ansible/f5/lab2$ ansible-playbook -i ~/ansible/f5/lab2/inventory bigip-node-3.yaml -vvv
ansible-playbook 2.9.6
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/home/devlin/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3/dist-packages/ansible
  executable location = /usr/bin/ansible-playbook
  python version = 3.8.2 (default, Jul 16 2020, 14:00:26) [GCC 9.3.0]
Using /etc/ansible/ansible.cfg as config file
host_list declined parsing /home/devlin/ansible/f5/lab2/inventory as it did not pass its verify_file() method
script declined parsing /home/devlin/ansible/f5/lab2/inventory as it did not pass its verify_file() method
auto declined parsing /home/devlin/ansible/f5/lab2/inventory as it did not pass its verify_file() method
Parsed /home/devlin/ansible/f5/lab2/inventory inventory source with ini plugin
 
PLAYBOOK: bigip-node-3.yaml ************************************************************************************************************************************************************************************************
1 plays in bigip-node-3.yaml
 
PLAY [BIG-IP SETUP] ********************************************************************************************************************************************************************************************************
META: ran handlers
 
TASK [CREATE NODES] ********************************************************************************************************************************************************************************************************
task path: /home/devlin/ansible/f5/lab2/bigip-node-3.yaml:9
fatal: [f5]: FAILED! => {
    "msg": "The task includes an option with an undefined variable. The error was: \"hostvars['webservers']\" is undefined\n\nThe error appears to be in '/home/devlin/ansible/f5/lab2/bigip-node-3.yaml': line 9, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n  - name: CREATE NODES\n    ^ here\n"
}
 
PLAY RECAP *****************************************************************************************************************************************************************************************************************
f5                         : ok=0    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0