- hosts: all
  
  tasks:
    - name: Get disk usage
      shell: df -h / | awk 'NR==2 {print $5}'
      register: disk_usage
      
    - name: Send notification
      community.general.pushover:
        title: 'Disk Space Warning!'
        msg: 'Disk usage from {{inventory_hostname}} is {{ disk_usage.stdout }}'
        app_token: '{{ app_token }}'
        user_key: '{{ user_key }}'
      delegate_to: localhost
      when: disk_usage.stdout[:-1]|int > {{disk_threshold}}