Ansible interface bonding tasks.

interfaces

# {{ ansible_managed }}

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

{% if ansible_interfaces|length > 2 %}

{% for interface in ansible_interfaces if interface != 'lo' and interface != 'bond0' %}

auto {{ interface }}
iface {{ interface }} inet manual
bond-master bond0

{% endfor %}

# The primary (bonded) network interface
auto bond0
iface bond0 inet static
address {{ ansible_default_ipv4.address }}
netmask {{ ansible_default_ipv4.netmask }}
gateway {{ ansible_default_ipv4.gateway }}
network {{ ansible_default_ipv4.network }}

# bond0 uses standard IEEE 802.3ad LACP bonding protocol
bond-mode 802.3ad
bond-slaves none

# Indicates that the devices are polled every 250ms to check for connection changes, such as
# a link being down or a link duplex having changed
bond-miimon 200

# Sets the rate for transmitting LACPDU packets, 0 is once every 30 seconds, 1 is every 1 second, which allows our
# network devices to automatically configure a single logical connection at the switch quickly
bond-lacp-rate 1

# Instructs the driver to spread the load over interfaces based on the source and destination
# IP address instead of MAC address
bond-xmit-hash-policy layer3+4
{% endif %}

{% if ansible_interfaces|length == 2 %}

# The primary network interface
auto {{ ansible_default_ipv4.interface }}
iface {{ ansible_default_ipv4.interface }} inet static
address {{ ansible_default_ipv4.address }}
netmask {{ ansible_default_ipv4.netmask }}
gateway {{ ansible_default_ipv4.gateway }}
network {{ ansible_default_ipv4.network }}

{% endif %}

dns-nameservers 8.8.8.8 8.8.4.4

# the end

main.yml

- name: Make sure ifenslave-2.6 is installed
  apt: pkg=ifenslave-2.6

- name: Make sure bonding is a kernel module in /etc/modules
  template: src=modules dest=/etc/modules

- name: Make sure /etc/network/interfaces has the correct bonding configuration
  template: backup=yes src=interfaces dest=/etc/network/interfaces

- name: Make sure we reboot after bonding the interfaces
  shell: /sbin/reboot
  async: 45
  poll: 0

- name: Wait for the server to reboot
  wait_for: delay=20 port=22

modules

# {{ ansible_managed }}

# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.

loop
rtc
bonding

site.yml

- hosts: all
  sudo: true
  roles:
    - { role: nic_bonding, when: "ansible_interfaces|length > 2 and 'bond0' not in ansible_interfaces" }