def populate_tags(tag):
"""Evaluate `tag` for all nodes.
This returns a `Deferred` that will fire when all tags have been
evaluated. The return value is intended FOR TESTING ONLY because:
- You must not use the `Deferred` in the calling thread; it must only be
manipulated in the reactor thread. Pretending it's not there is safer
than chaining code onto it because it's easy to get wrong.
- The call may not finish for 10 minutes or more. It is therefore not a
good thing to be waiting for in a web request.
"""
# This function cannot be called inside a transaction. The function manages
# its own transaction.
if in_transaction():
raise TransactionManagementError(
'`populate_tags` cannot be called inside an existing transaction.')
logger.debug('Evaluating the "%s" tag for all nodes.', tag.name)
clients = getAllClients()
if len(clients) == 0:
# We have no clients so we need to do the work locally.
@transactional
def _populate_tag():
return populate_tag_for_multiple_nodes(tag, Node.objects.all())
return _populate_tag()
else:
# Split the work between the connected rack controllers.
@transactional
def _generate_work():
node_ids = Node.objects.all().values_list("system_id", flat=True)
node_ids = [{"system_id": node_id} for node_id in node_ids]
chunked_node_ids = list(chunk_list(node_ids, len(clients)))
connected_racks = []
for idx, client in enumerate(clients):
rack = RackController.objects.get(system_id=client.ident)
token = _get_or_create_auth_token(rack.owner)
creds = convert_tuple_to_string(get_creds_tuple(token))
if len(chunked_node_ids) > idx:
connected_racks.append({
"system_id": rack.system_id,
"hostname": rack.hostname,
"client": client,
"tag_name": tag.name,
"tag_definition": tag.definition,
"tag_nsmap": [
{"prefix": prefix, "uri": uri}
for prefix, uri in tag_nsmap.items()
],
"credentials": creds,
"nodes": list(chunked_node_ids[idx]),
})
return connected_racks
return _do_populate_tags(_generate_work())
def populate_tags(tag):
"""Send worker for all nodegroups an update_node_tags request.
"""
items = {
'tag_name': tag.name,
'tag_definition': tag.definition,
'tag_nsmap': tag_nsmap,
}
# Rather than using NodeGroup.objects.refresh_workers() we call
# refresh_worker immediately before we pass the requet. This is mostly for
# the test suite, where we need the single real worker to switch to the
# worker for a given nodegroup, before we have that worker process the
# request.
logger.debug('Refreshing tag definition for %s' % (items, ))
for nodegroup in NodeGroup.objects.all():
refresh_worker(nodegroup)
update_node_tags.apply_async(queue=nodegroup.work_queue, kwargs=items)
def _gen_reverse_zones(subnets, serial, ns_host_name, mappings,
default_ttl):
"""Generator of reverse zones, sorted by network."""
subnets = set(subnets)
# Generate the list of parent networks for rfc2317 glue. Note that we
# need to handle the case where we are controlling both the small net
# and a bigger network containing the /24, not just a /24 network.
rfc2317_glue = {}
for subnet in subnets:
network = IPNetwork(subnet.cidr)
if subnet.rdns_mode == RDNS_MODE.RFC2317:
# If this is a small subnet and we are doing RFC2317 glue for
# it, then we need to combine that with any other such subnets
# We need to know this before we start creating reverse DNS
# zones.
if network.version == 4 and network.prefixlen > 24:
# Turn 192.168.99.32/29 into 192.168.99.0/24
basenet = IPNetwork(
"%s/24" % IPNetwork("%s/24" % network.network).network)
rfc2317_glue.setdefault(basenet, set()).add(network)
elif network.version == 6 and network.prefixlen > 124:
basenet = IPNetwork(
"%s/124" %
IPNetwork("%s/124" % network.network).network)
rfc2317_glue.setdefault(basenet, set()).add(network)
# Since get_hostname_ip_mapping(Subnet) ignores Subnet.id, so we can
# just do it once and be happy. LP#1600259
if len(subnets):
mappings['reverse'] = mappings[Subnet.objects.first()]
# For each of the zones that we are generating (one or more per
# subnet), compile the zone from:
# 1. Dynamic ranges on this subnet.
# 2. Node: ip mapping(subnet), including DNSResource records for
# StaticIPAddresses in this subnet.
# All of this needs to be done smallest to largest so that we can
# correctly gather the rfc2317 glue that we need. Failure to sort
# means that we wind up grabbing (and deleting) the rfc2317 glue info
# while processing the wrong network.
for subnet in sorted(
subnets,
key=lambda subnet: IPNetwork(subnet.cidr).prefixlen,
reverse=True):
network = IPNetwork(subnet.cidr)
if subnet.rdns_mode == RDNS_MODE.DISABLED:
# If we are not doing reverse dns for this subnet, then just
# skip to the next subnet.
logger.debug("%s disabled subnet in DNS config list" %
subnet.cidr)
continue
# 1. Figure out the dynamic ranges.
dynamic_ranges = [
ip_range.netaddr_iprange
for ip_range in subnet.get_dynamic_ranges()
]
# 2. Start with the map of all of the nodes, including all
# DNSResource-associated addresses. We will prune this to just
# entries for the subnet when we actually generate the zonefile.
# If we get here, then we have subnets, so we noticed that above
# and created mappings['reverse']. LP#1600259
mapping = mappings['reverse']
# Use the default_domain as the name for the NS host in the reverse
# zones. If this network is actually a parent rfc2317 glue
# network, then we need to generate the glue records.
# We need to detect the need for glue in our networks that are
# big.
if ((network.version == 6 and network.prefixlen < 124)
or network.prefixlen < 24):
glue = set()
# This is the reason for needing the subnets sorted in
# increasing order of size.
for net in rfc2317_glue.copy().keys():
if net in network:
glue.update(rfc2317_glue[net])
del (rfc2317_glue[net])
elif network in rfc2317_glue:
glue = rfc2317_glue[network]
del (rfc2317_glue[network])
else:
glue = set()
yield DNSReverseZoneConfig(
ns_host_name,
serial=serial,
default_ttl=default_ttl,
ns_host_name=ns_host_name,
mapping=mapping,
network=IPNetwork(subnet.cidr),
dynamic_ranges=dynamic_ranges,
rfc2317_ranges=glue,
)
# Now provide any remaining rfc2317 glue networks.
for network, ranges in rfc2317_glue.items():
yield DNSReverseZoneConfig(
ns_host_name,
serial=serial,
default_ttl=default_ttl,
network=network,
ns_host_name=ns_host_name,
rfc2317_ranges=ranges,
)
