netbox-ddns/netbox_ddns/signals.py

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2020-04-15 00:56:20 +02:00
import logging
from django.db.models.signals import post_delete, post_save, pre_save
from django.dispatch import receiver
from ipam.models import IPAddress
from netbox_ddns.background_tasks import update_dns
logger = logging.getLogger('netbox_ddns')
@receiver(pre_save, sender=IPAddress)
def store_original_ipaddress(instance: IPAddress, **_kwargs):
instance.before_save = IPAddress.objects.filter(pk=instance.pk).first()
@receiver(post_save, sender=IPAddress)
def trigger_ddns_update(instance: IPAddress, **_kwargs):
old_address = instance.before_save.address if instance.before_save else None
old_dns_name = instance.before_save.dns_name if instance.before_save else ''
if instance.address != old_address or instance.dns_name != old_dns_name:
# IP address or DNS name has changed
update_dns.delay(
old_address=old_address.ip if old_address else None,
new_address=instance.address.ip,
old_dns_name=old_dns_name.rstrip('.'),
new_dns_name=instance.dns_name.rstrip('.'),
)
@receiver(post_delete, sender=IPAddress)
def trigger_ddns_delete(instance: IPAddress, **_kwargs):
update_dns.delay(
old_address=instance.address.ip,
old_dns_name=instance.dns_name.rstrip('.'),
)