junos-install-ssh-key.yaml

---
- hosts: all
  gather_facts: no

  vars:
    - auth_key: "{{lookup('file', '{{ key_file }}')}}"    

  tasks:
    - name: Install SSH key on remote host
      junos_config:
        lines:
          - set system login user ansible authentication ssh-rsa "{{ auth_key }}"
          - set system login user ansible class super-user