How to do it...

1. Create a new playbook called ansible_cond.yml inside the ch1_ansible folder.
2. Place the following content in the new playbook as shown here:

---
  - name: Using conditionals
    hosts: all
    gather_facts: no
    tasks:
      - name: Run for Edge nodes Only
        debug:
          msg: "Router name is {{ hostname }}"
        when: "'edge' in group_names"

      - name: Run for Only MX1 node
        debug:
          msg: "{{ hostname }} is running {{ os }}"
        when:
          - inventory_hostname == 'mx1'

3. Run the playbook as shown here:

$ ansible-playbook -i hosts ansible_cond.yml