---
- name: get int name
  shell: ip -o addr show to {{ item }} | awk '{print $2}'
  register: int_name


- name: add interface ip
  blockinfile:
    path: /etc/frr/frr.conf
    block: |
      !
      interface {{ int_name.stdout }}
       ip address {{ item }} 
       ip ospf cost 20
      exit
    marker: ""
  notify: restart frr