Sysctl

{% for item in data['sysctl']['file']['sysctl'] %}

{{ data['sysctl']['file']['sysctl'][item]['description'] }}.
For resolving the issue, add this line in the {{ data['sysctl']['file']['filename'] }} file: 

 	    {{ data['sysctl']['file']['sysctl'][item]['flag'] }} = {{ data['sysctl']['file']['sysctl'][item]['value'] }}
{% endfor %}