gistfile1.txt

vagrant@oob-mgmt-server:~/tenict/ansible$ cat interfaces.yml 
---
- hosts: switches 
  user: root
  tasks:
  - name: configure /etc/network/interfaces
    template: src=templates/interfaces.j2 dest=/etc/network/interfaces
    notify: restart networking

  - name: ensure networking is running
    service: name=networking state=started

  handlers:
  - name: restart networking
    command: "/sbin/ifreload -a"
vagrant@oob-mgmt-server:~/tenict/ansible$ cat group_vars/all
interfaces:
	leaf01:
		int_unassigned: ["swp1", "swp2", "swp49", "swp50", "swp51", "swp52"]
		loopback:
			ip: "10.100.1.1"
	leaf02:
		int_unassigned: ["swp1", "swp2", "swp49", "swp50", "swp51", "swp52"]
		loopback:
			ip: "10.100.1.2"
	leaf03:
		int_unassigned: ["swp1", "swp2", "swp49", "swp50", "swp51", "swp52"]
		loopback:
			ip: "10.100.1.3"
	leaf04:
		int_unassigned: ["swp1", "swp2", "swp49", "swp50", "swp51", "swp52"]
		loopback:
			ip: "10.100.1.4"
vagrant@oob-mgmt-server:~/tenict/ansible$ cat templates/interfaces.j2 
{{ header_tmpl }}
{%- set intvars = interfaces[ansible_hostname] -%}
{%- set loopback_int = intvars.loopback -%}

# Default Loopback
auto lo
iface lo inet loopback

{% if loopback_int is defined -%}
# Generated Loopback
auto lo:1
iface lo:1 inet static    
	address {{ loopback_int[ip] }}/32
{% endif -%}

# Vagrant interface
auto vagrant
iface vagrant inet dhcp

# Management interface
auto eth0
iface eth0 inet dhcp

#
# SWP
#
{% if intvars.int_unassigned is defined -%}
{% for intname in intvars.int_unassigned %}
auto {{ intname }}
iface {{ intname }}
{% endif -%}