anycast-interface.service.j2

# {{ ansible_managed }}
{%- set _type = item.type | default(anycast_default_type) %}
{%- if item.address is not defined %}
{#   Address is not defined #}
{%   set _address = [] %}
{% elif item.address is iterable and item.address is not string %}
{#   Address is a list, multiple addresses defined #}
{%   set _address = item.address %}
{% else %}
{#   Single address defined #}
{%   set _address = [item] %}
{% endif %}
{%- set _services = anycast_global_binds + item.service_binds | default([]) %}

[Unit]
Description=Anycasted network service bind
After=network.target {{ _services | join(' ') }}
BindsTo={{ _services | join(' ') }}

[Service]
Type=oneshot
{% if _type == 'dummy' %}
ExecStart=-/sbin/ip link del {{ item.interface }}
ExecStart=/sbin/ip link add {{ item.interface }} type dummy
{% endif %}
{% for _addr in _address %}
{%   if _addr is string %}
{%       set _addr = {'address': _addr} %}
{%   endif %}
{%   set _addr_cidr = (_addr.address ~ '/' ~ _addr.netmask | default('')).rstrip('/') | ipaddr('host') %}
ExecStart=/sbin/ip {{ (_addr_cidr | ipv6) | ternary('-6 ', '') }}addr add {{ _addr_cidr }} dev {{ item.interface }}
{% endfor %}
{% if _type == 'dummy' %}
ExecStart=/sbin/ip link set {{ item.interface }} up
ExecStop=-/sbin/ip link set {{ item.interface }} down
{% endif %}
{% for _addr in _address %}
{%   if _addr is string %}
{%       set _addr = {'address': _addr} %}
{%   endif %}
{%   set _addr_cidr = (_addr.address ~ '/' ~ _addr.netmask | default('')).rstrip('/') | ipaddr('host')  %}
ExecStop=-/sbin/ip {{ (_addr_cidr | ipv6) | ternary('-6 ', '') }}addr del {{ _addr_cidr }} dev {{ item.interface }}
{% endfor %}
{% if _type == 'dummy' %}
ExecStop=-/sbin/ip link del {{ item.interface }}
{% endif %}
RemainAfterExit=true
TimeoutStartSec=5min

[Install]
WantedBy={{ _services | join(' ') }}