/usr/lib/python2.7/dist-packages/maasserver/dns_connect.py is in python-django-maas 1.5.4+bzr2294-0ubuntu1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | # Copyright 2012-2014 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""DNS management module: connect DNS tasks with signals."""
from __future__ import (
absolute_import,
print_function,
unicode_literals,
)
str = None
__metaclass__ = type
__all__ = [
]
from django.db.models.signals import (
post_delete,
post_save,
)
from django.dispatch import receiver
from maasserver.enum import NODEGROUPINTERFACE_MANAGEMENT
from maasserver.models import (
Config,
Node,
NodeGroup,
NodeGroupInterface,
)
from maasserver.signals import connect_to_field_change
@receiver(post_save, sender=NodeGroup)
def dns_post_save_NodeGroup(sender, instance, created, **kwargs):
"""Create or update DNS zones related to the saved nodegroup."""
from maasserver.dns import write_full_dns_config, add_zone
if created:
add_zone(instance)
else:
write_full_dns_config()
# XXX rvb 2012-09-12: This is only needed because we use that
# information to pre-populate the zone file. Once we stop doing that,
# this can be removed.
@receiver(post_save, sender=NodeGroupInterface)
def dns_post_save_NodeGroupInterface(sender, instance, created, **kwargs):
"""Create or update DNS zones related to the saved nodegroupinterface."""
from maasserver.dns import write_full_dns_config, add_zone
if created:
add_zone(instance.nodegroup)
else:
write_full_dns_config()
def dns_post_edit_management_NodeGroupInterface(instance, old_values, deleted):
"""Delete DNS zones related to the interface."""
from maasserver.dns import write_full_dns_config
[old_field] = old_values
if old_field == NODEGROUPINTERFACE_MANAGEMENT.DHCP_AND_DNS:
# Force the dns config to be written as this might have been
# triggered by the last DNS-enabled interface being deleted
# or switched off (i.e. management set to DHCP or UNMANAGED).
write_full_dns_config(force=True)
connect_to_field_change(
dns_post_edit_management_NodeGroupInterface,
NodeGroupInterface, ['management'], delete=True)
@receiver(post_delete, sender=Node)
def dns_post_delete_Node(sender, instance, **kwargs):
"""When a Node is deleted, update the Node's zone file."""
try:
from maasserver.dns import change_dns_zones
change_dns_zones(instance.nodegroup)
except NodeGroup.DoesNotExist:
# If this Node is being deleted because the whole NodeGroup
# has been deleted, no need to update the zone file because
# this Node got removed.
pass
def dns_post_edit_hostname_Node(instance, old_values, **kwargs):
"""When a Node has been flagged, update the related zone."""
from maasserver.dns import change_dns_zones
change_dns_zones(instance.nodegroup)
connect_to_field_change(dns_post_edit_hostname_Node, Node, ['hostname'])
def upstream_dns_changed(sender, instance, created, **kwargs):
from maasserver.dns import write_full_dns_config
write_full_dns_config()
Config.objects.config_changed_connect("upstream_dns", upstream_dns_changed)
|