internal_interface variable missing

[grawert]

The host variable internal_interface is missing:

TASK [osism.services.manager : Copy ansible environment file] *************************************************************************************************************************************
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: ansible.errors.AnsibleUndefinedVariable: http://{{ hostvars[inventory_hostname]['ansible_' + internal_interface]['ipv4']['address'] }}:8121: 'internal_interface' is undefined
fatal: [ops01]: FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: http://{{ hostvars[inventory_hostname]['ansible_' + internal_interface]['ipv4']['address'] }}:8121: 'internal_interface' is undefined"}