def _try_generate_ip(context, subnets):
"""Generate an IP address.
The IP address will be generated from one of the subnets defined on
the network.
"""
range_qry = context.session.query(
models_v2.IPAvailabilityRange).join(
models_v2.IPAllocationPool).with_lockmode('update')
for subnet in subnets:
ip_range = range_qry.filter_by(subnet_id=subnet['id']).first()
if not ip_range:
LOG.debug("All IPs from subnet %(subnet_id)s (%(cidr)s) "
"allocated",
{'subnet_id': subnet['id'],
'cidr': subnet['cidr']})
continue
ip_address = ip_range['first_ip']
if ip_range['first_ip'] == ip_range['last_ip']:
# No more free indices on subnet => delete
LOG.debug("No more free IP's in slice. Deleting "
"allocation pool.")
context.session.delete(ip_range)
else:
# increment the first free
new_first_ip = str(netaddr.IPAddress(ip_address) + 1)
ip_range['first_ip'] = new_first_ip
LOG.debug("Allocated IP - %(ip_address)s from %(first_ip)s "
"to %(last_ip)s",
{'ip_address': ip_address,
'first_ip': ip_address,
'last_ip': ip_range['last_ip']})
return {'ip_address': ip_address,
'subnet_id': subnet['id']}
raise n_exc.IpAddressGenerationFailure(net_id=subnets[0]['network_id'])
def _choose_available_subnet(self,
context,
net_id,
version=None,
ip_address=None):
filters = {}
if version:
filters["version"] = version
subnets = db_api.subnet_find_allocation_counts(context,
net_id,
scope=db_api.ALL,
**filters)
for subnet, ips_in_subnet in subnets:
ipnet = netaddr.IPNetwork(subnet["cidr"])
if ip_address and ip_address not in ipnet:
continue
ip_policy_rules = None
if not ip_address:
ip_policy_rules = self.get_ip_policy_rule_set(subnet)
policy_size = ip_policy_rules.size if ip_policy_rules else 0
if ipnet.size > (ips_in_subnet + policy_size):
return subnet
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
def _choose_available_subnet(self, context, net_id, version=None,
segment_id=None, ip_address=None,
reallocated_ips=None):
subnets = super(QuarkIpamBOTHREQ, self)._choose_available_subnet(
context, net_id, version, segment_id, ip_address, reallocated_ips)
if len(reallocated_ips) + len(subnets) < 2:
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
return subnets
def _choose_available_subnet(self, context, net_id, version=None,
segment_id=None, ip_address=None,
reallocated_ips=None):
filters = {}
if version:
filters["ip_version"] = version
subnet = self.select_subnet(context, net_id, ip_address, segment_id,
**filters)
if subnet:
return [subnet]
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
def test_generate_ip_exhausted_pool(self):
with mock.patch.object(non_ipam.IpamNonPluggableBackend,
'_try_generate_ip') as generate:
with mock.patch.object(non_ipam.IpamNonPluggableBackend,
'_rebuild_availability_ranges') as rebuild:
exception = n_exc.IpAddressGenerationFailure(net_id='n')
# fail first call but not second
generate.side_effect = [exception, None]
non_ipam.IpamNonPluggableBackend._generate_ip('c', 's')
self.assertEqual(2, generate.call_count)
rebuild.assert_called_once_with('c', 's')
def _ipam_allocate_single_ip(self, context, ipam_driver, port, subnets):
"""Allocates single ip from set of subnets
Raises n_exc.IpAddressGenerationFailure if allocation failed for
all subnets.
"""
for subnet in subnets:
try:
return [
self._ipam_try_allocate_ip(context, ipam_driver, port,
subnet), subnet
]
except ipam_exc.IpAddressGenerationFailure:
continue
raise n_exc.IpAddressGenerationFailure(net_id=port['network_id'])
def _allocate_floatingip_from_configured_subnets(self, context):
cfg.CONF.register_opts(explicit_floating_ip_opts, group='akanda')
# NOTE(dhellmann): There may be a better way to do this, but
# the "filter" argument to get_subnets() is not documented so
# who knows.
e_context = context.elevated()
subnets = [
self._get_subnet(e_context, unicode(s))
for s in cfg.CONF.akanda.floatingip_subnet
]
if not subnets:
LOG.error('config setting akanda.floatingip_subnet missing')
raise q_exc.IpAddressGenerationFailure(net_id='UNKNOWN')
# The base class method _generate_ip() handles the allocation
# ranges and going from one subnet to the next when a network
# is exhausted.
return self._generate_ip(context, subnets)
def _choose_available_subnet(self, context, net_id, version=None,
segment_id=None, ip_address=None,
reallocated_ips=None):
both_subnet_versions = []
need_versions = [4, 6]
for i in reallocated_ips:
if i["version"] in need_versions:
need_versions.remove(i["version"])
filters = {}
for ver in need_versions:
filters["ip_version"] = ver
sub = self.select_subnet(context, net_id, ip_address, segment_id,
**filters)
if sub:
both_subnet_versions.append(sub)
if not reallocated_ips and not both_subnet_versions:
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
return both_subnet_versions
def test_create_port_catch_ip_generation_failure_reraise(self):
self.assertRaises(
n_exc.IpAddressGenerationFailure,
self._test__port_action_with_failures,
exc=n_exc.IpAddressGenerationFailure(net_id='foo_network_id'),
action='create_port')
def _allocate_from_v6_subnet(self, context, net_id, subnet,
port_id, reuse_after, ip_address=None,
**kwargs):
"""This attempts to allocate v6 addresses as per RFC2462 and RFC3041.
To accomodate this, we effectively treat all v6 assignment as a
first time allocation utilizing the MAC address of the VIF. Because
we recycle MACs, we will eventually attempt to recreate a previously
generated v6 address. Instead of failing, we've opted to handle
reallocating that address in this method.
This should provide a performance boost over attempting to check
each and every subnet in the existing reallocate logic, as we'd
have to iterate over each and every subnet returned
"""
LOG.info("Attempting to allocate a v6 address - [{0}]".format(
utils.pretty_kwargs(network_id=net_id, subnet=subnet,
port_id=port_id, ip_address=ip_address)))
if ip_address:
LOG.info("IP %s explicitly requested, deferring to standard "
"allocation" % ip_address)
return self._allocate_from_subnet(context, net_id=net_id,
subnet=subnet, port_id=port_id,
reuse_after=reuse_after,
ip_address=ip_address, **kwargs)
else:
mac = kwargs.get("mac_address")
if mac:
mac = kwargs["mac_address"].get("address")
ip_policy_cidrs = models.IPPolicy.get_ip_policy_cidrs(subnet)
for tries, ip_address in enumerate(
generate_v6(mac, port_id, subnet["cidr"])):
LOG.info("Attempt {0} of {1}".format(
tries + 1, CONF.QUARK.v6_allocation_attempts))
if tries > CONF.QUARK.v6_allocation_attempts - 1:
LOG.info("Exceeded v6 allocation attempts, bailing")
raise exceptions.IpAddressGenerationFailure(
net_id=net_id)
ip_address = netaddr.IPAddress(ip_address).ipv6()
LOG.info("Generated a new v6 address {0}".format(
str(ip_address)))
# NOTE(mdietz): treating the IPSet as a boolean caused netaddr
# to attempt to enumerate the entire set!
if (ip_policy_cidrs is not None and
ip_address in ip_policy_cidrs):
LOG.info("Address {0} excluded by policy".format(
str(ip_address)))
continue
# TODO(mdietz): replace this with a compare-and-swap loop
with context.session.begin():
address = db_api.ip_address_find(
context, network_id=net_id, ip_address=ip_address,
scope=db_api.ONE, reuse_after=reuse_after,
deallocated=True, subnet_id=subnet["id"],
lock_mode=True)
if address:
LOG.info("Address {0} exists, claiming".format(
str(ip_address)))
return db_api.ip_address_update(
context, address, deallocated=False,
deallocated_at=None,
used_by_tenant_id=context.tenant_id,
allocated_at=timeutils.utcnow(),
address_type=kwargs.get('address_type',
ip_types.FIXED))
# This triggers when the IP is allocated to another tenant,
# either because we missed it due to our filters above, or
# in an extremely unlikely race between the find and here.
try:
with context.session.begin():
return db_api.ip_address_create(
context, address=ip_address,
subnet_id=subnet["id"],
version=subnet["ip_version"], network_id=net_id,
address_type=kwargs.get('address_type',
ip_types.FIXED))
except db_exception.DBDuplicateEntry:
LOG.info("{0} exists but was already "
"allocated".format(str(ip_address)))
LOG.debug("Duplicate entry found when inserting subnet_id"
" %s ip_address %s", subnet["id"], ip_address)
def allocate_ip_address(self,
context,
net_id,
port_id,
reuse_after,
version=None,
ip_address=None):
elevated = context.elevated()
if ip_address:
ip_address = netaddr.IPAddress(ip_address)
address = db_api.ip_address_find(elevated,
network_id=net_id,
reuse_after=reuse_after,
deallocated=True,
scope=db_api.ONE,
ip_address=ip_address)
if address:
return db_api.ip_address_update(elevated,
address,
deallocated=False,
deallocated_at=None)
subnet = self._choose_available_subnet(elevated,
net_id,
ip_address=ip_address,
version=version)
ip_policy_rules = self.get_ip_policy_rule_set(subnet)
# Creating this IP for the first time
next_ip = None
if ip_address:
next_ip = ip_address
address = db_api.ip_address_find(elevated,
network_id=net_id,
ip_address=next_ip,
tenant_id=elevated.tenant_id,
scope=db_api.ONE)
if address:
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
else:
address = True
while address:
next_ip_int = int(subnet["next_auto_assign_ip"])
next_ip = netaddr.IPAddress(next_ip_int)
if subnet["ip_version"] == 4:
next_ip = next_ip.ipv4()
subnet["next_auto_assign_ip"] = next_ip_int + 1
if ip_policy_rules and next_ip in ip_policy_rules:
continue
address = db_api.ip_address_find(elevated,
network_id=net_id,
ip_address=next_ip,
tenant_id=elevated.tenant_id,
scope=db_api.ONE)
address = db_api.ip_address_create(elevated,
address=next_ip,
subnet_id=subnet["id"],
version=subnet["ip_version"],
network_id=net_id)
address["deallocated"] = 0
return address
def allocate_ip_address(self, context, new_addresses, net_id, port_id,
reuse_after, segment_id=None, version=None,
ip_addresses=None, subnets=None, **kwargs):
elevated = context.elevated()
subnets = subnets or []
ip_addresses = ip_addresses or []
ipam_log = kwargs.get('ipam_log', None)
LOG.info("Starting a new IP address(es) allocation. Strategy "
"is {0} - [{1}]".format(
self.get_name(),
utils.pretty_kwargs(network_id=net_id, port_id=port_id,
new_addresses=new_addresses,
ip_addresses=ip_addresses,
subnets=subnets,
segment_id=segment_id,
version=version)))
def _try_reallocate_ip_address(ipam_log, ip_addr=None):
new_addresses.extend(self.attempt_to_reallocate_ip(
context, net_id, port_id, reuse_after, version=None,
ip_address=ip_addr, segment_id=segment_id, subnets=subnets,
**kwargs))
def _try_allocate_ip_address(ipam_log, ip_addr=None, sub=None):
for retry in xrange(CONF.QUARK.ip_address_retry_max):
attempt = None
if ipam_log:
attempt = ipam_log.make_entry("_try_allocate_ip_address")
LOG.info("Allocating new IP attempt {0} of {1}".format(
retry + 1, CONF.QUARK.ip_address_retry_max))
if not sub:
subnets = self._choose_available_subnet(
elevated, net_id, version, segment_id=segment_id,
ip_address=ip_addr, reallocated_ips=new_addresses)
else:
subnets = [self.select_subnet(context, net_id,
ip_addr, segment_id,
subnet_ids=[sub])]
LOG.info("Subnet selection returned {0} viable subnet(s) - "
"IDs: {1}".format(len(subnets),
", ".join([str(s["id"])
for s in subnets if s])))
try:
self._allocate_ips_from_subnets(context, new_addresses,
net_id, subnets,
port_id, reuse_after,
ip_addr, **kwargs)
except q_exc.IPAddressRetryableFailure:
LOG.exception("Error in allocating IP")
if attempt:
LOG.debug("ATTEMPT FAILED")
attempt.failed()
remaining = CONF.QUARK.ip_address_retry_max - retry - 1
if remaining > 0:
LOG.info("{0} retries remain, retrying...".format(
remaining))
else:
LOG.info("No retries remaing, bailing")
continue
finally:
if attempt:
attempt.end()
break
ip_addresses = [netaddr.IPAddress(ip_address)
for ip_address in ip_addresses]
if ip_addresses:
for ip_address in ip_addresses:
_try_reallocate_ip_address(ipam_log, ip_address)
else:
_try_reallocate_ip_address(ipam_log)
if self.is_strategy_satisfied(new_addresses):
return
else:
LOG.info("Reallocated addresses {0} but still need more addresses "
"to satisfy strategy {1}. Falling back to creating "
"IPs".format(new_addresses, self.get_name()))
if ip_addresses or subnets:
for ip_address, subnet in itertools.izip_longest(ip_addresses,
subnets):
_try_allocate_ip_address(ipam_log, ip_address, subnet)
else:
_try_allocate_ip_address(ipam_log)
if self.is_strategy_satisfied(new_addresses, allocate_complete=True):
self._notify_new_addresses(context, new_addresses)
LOG.info("IPAM for port ID {0} completed with addresses "
"{1}".format(port_id,
[a["address_readable"]
for a in new_addresses]))
return
ipam_log.failed()
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
def allocate_ip_address(self,
context,
new_addresses,
net_id,
port_id,
reuse_after,
segment_id=None,
version=None,
ip_address=None,
subnets=None,
**kwargs):
elevated = context.elevated()
if ip_address:
ip_address = netaddr.IPAddress(ip_address)
new_addresses.extend(
self.attempt_to_reallocate_ip(context,
net_id,
port_id,
reuse_after,
version=None,
ip_address=ip_address,
segment_id=segment_id,
subnets=subnets,
**kwargs))
if self.is_strategy_satisfied(new_addresses):
return
for retry in xrange(cfg.CONF.QUARK.ip_address_retry_max):
if not subnets:
subs = self._choose_available_subnet(
elevated,
net_id,
version,
segment_id=segment_id,
ip_address=ip_address,
reallocated_ips=new_addresses)
else:
subs = [
self.select_subnet(context,
net_id,
ip_address,
segment_id,
subnet_ids=subnets)
]
try:
self._allocate_ips_from_subnets(context, new_addresses, net_id,
subs, port_id, reuse_after,
ip_address, **kwargs)
except q_exc.IPAddressRetryableFailure:
LOG.exception("Error in allocating IP")
continue
break
if self.is_strategy_satisfied(new_addresses, allocate_complete=True):
self._notify_new_addresses(context, new_addresses)
return
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
def _allocate_from_v6_subnet(self,
context,
net_id,
subnet,
port_id,
reuse_after,
ip_address=None,
**kwargs):
"""This attempts to allocate v6 addresses as per RFC2462 and RFC3041.
To accomodate this, we effectively treat all v6 assignment as a
first time allocation utilizing the MAC address of the VIF. Because
we recycle MACs, we will eventually attempt to recreate a previously
generated v6 address. Instead of failing, we've opted to handle
reallocating that address in this method.
This should provide a performance boost over attempting to check
each and every subnet in the existing reallocate logic, as we'd
have to iterate over each and every subnet returned
"""
if not (ip_address is None and "mac_address" in kwargs
and kwargs["mac_address"]):
return self._allocate_from_subnet(context, net_id, subnet,
reuse_after, ip_address,
**kwargs)
else:
ip_policy_cidrs = models.IPPolicy.get_ip_policy_cidrs(subnet)
for tries, ip_address in enumerate(
generate_v6(kwargs["mac_address"]["address"], port_id,
subnet["cidr"])):
if tries > CONF.QUARK.v6_allocation_attempts - 1:
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
ip_address = netaddr.IPAddress(ip_address)
# NOTE(mdietz): treating the IPSet as a boolean caused netaddr
# to attempt to enumerate the entire set!
if (ip_policy_cidrs is not None
and ip_address in ip_policy_cidrs):
continue
# TODO(mdietz): replace this with a compare-and-swap loop
with context.session.begin():
address = db_api.ip_address_find(context,
network_id=net_id,
ip_address=ip_address,
scope=db_api.ONE,
reuse_after=reuse_after,
deallocated=True,
subnet_id=subnet["id"],
lock_mode=True)
if address:
return db_api.ip_address_update(
context,
address,
deallocated=False,
deallocated_at=None,
used_by_tenant_id=context.tenant_id,
allocated_at=timeutils.utcnow())
# This triggers when the IP is allocated to another tenant,
# either because we missed it due to our filters above, or
# in an extremely unlikely race between the find and here.
try:
with context.session.begin():
return db_api.ip_address_create(
context,
address=ip_address,
subnet_id=subnet["id"],
version=subnet["ip_version"],
network_id=net_id)
except db_exception.DBDuplicateEntry:
LOG.debug(
"Duplicate entry found when inserting subnet_id"
" %s ip_address %s", subnet["id"], ip_address)
def attempt_to_reallocate_ip(self,
context,
net_id,
port_id,
reuse_after,
version=None,
ip_address=None,
segment_id=None,
subnets=None,
**kwargs):
version = version or [4, 6]
elevated = context.elevated()
if version == 6 and "mac_address" in kwargs and kwargs["mac_address"]:
# Defers to the create case. The reason why is we'd have to look
# up subnets here to correctly generate the v6. If we split them
# up into reallocate and create, we'd be looking up the same
# subnets twice, which is a waste of time.
# TODO(mdietz): after reviewing this code, this block annoyingly
# doesn't trigger in the ANY case, since we end up
# using a list of [4, 6]. It works as expected most
# of the time, but we can anticipate that isolated
# networks will end up using sequential assignment.
# Probably want to rework this logic to compensate
# at some point. Considering they all come from the
# same MAC address pool, nothing bad will happen,
# just worth noticing and fixing.
return []
sub_ids = []
if subnets:
sub_ids = subnets
else:
if segment_id:
subnets = db_api.subnet_find(elevated,
network_id=net_id,
segment_id=segment_id)
sub_ids = [s["id"] for s in subnets]
if not sub_ids:
raise exceptions.IpAddressGenerationFailure(net_id=net_id)
ip_kwargs = {
"network_id": net_id,
"reuse_after": reuse_after,
"deallocated": True,
"scope": db_api.ONE,
"ip_address": ip_address,
"lock_mode": True,
"version": version,
"order_by": "address",
"do_not_use": False
}
if sub_ids:
ip_kwargs["subnet_id"] = sub_ids
# We never want to take the chance of an infinite loop here. Instead,
# we'll clean up multiple bad IPs if we find them (assuming something
# is really wrong)
for retry in xrange(cfg.CONF.QUARK.ip_address_retry_max):
get_policy = models.IPPolicy.get_ip_policy_cidrs
try:
with context.session.begin():
# NOTE(mdietz): Before I removed the lazy=joined, this
# raised with an unknown column "address"
# error.
address = db_api.ip_address_find(elevated, **ip_kwargs)
if address:
# NOTE(mdietz): We should always be in the CIDR but we
# also said that before :-/
subnet = address.get('subnet')
if subnet:
policy = get_policy(subnet)
cidr = netaddr.IPNetwork(address["subnet"]["cidr"])
addr = netaddr.IPAddress(int(address["address"]))
if address["subnet"]["ip_version"] == 4:
addr = addr.ipv4()
else:
addr = addr.ipv6()
if policy is not None and addr in policy:
context.session.delete(address)
continue
if addr in cidr:
updated_address = db_api.ip_address_update(
elevated,
address,
deallocated=False,
deallocated_at=None,
used_by_tenant_id=context.tenant_id,
allocated_at=timeutils.utcnow())
return [updated_address]
else:
# Make sure we never find it again
context.session.delete(address)
else:
break
except Exception:
LOG.exception("Error in reallocate ip...")
return []
def test_create_port_catch_and_handle_ip_generation_failure(self):
self.plugin.get_subnet.side_effect = (
n_exc.SubnetNotFound(subnet_id='foo_subnet_id'))
self._test__port_action_with_failures(
exc=n_exc.IpAddressGenerationFailure(net_id='foo_network_id'),
action='create_port')
def attempt_to_reallocate_ip(self, context, net_id, port_id, reuse_after,
version=None, ip_address=None,
segment_id=None, subnets=None, **kwargs):
version = version or [4, 6]
elevated = context.elevated()
LOG.info("Attempting to reallocate an IP (step 1 of 3) - [{0}]".format(
utils.pretty_kwargs(network_id=net_id, port_id=port_id,
version=version, segment_id=segment_id,
subnets=subnets)))
if version == 6:
# Defers to the create case. The reason why is we'd have to look
# up subnets here to correctly generate the v6. If we split them
# up into reallocate and create, we'd be looking up the same
# subnets twice, which is a waste of time.
# TODO(mdietz): after reviewing this code, this block annoyingly
# doesn't trigger in the ANY case, since we end up
# using a list of [4, 6]. It works as expected most
# of the time, but we can anticipate that isolated
# networks will end up using sequential assignment.
# Probably want to rework this logic to compensate
# at some point. Considering they all come from the
# same MAC address pool, nothing bad will happen,
# just worth noticing and fixing.
LOG.info("Identified as v6 case, deferring to IP create path")
return []
sub_ids = []
if subnets:
sub_ids = subnets
elif segment_id:
subnets = db_api.subnet_find(elevated,
network_id=net_id,
segment_id=segment_id)
sub_ids = [s["id"] for s in subnets]
if not sub_ids:
LOG.info("No subnets matching segment_id {0} could be "
"found".format(segment_id))
raise exceptions.IpAddressGenerationFailure(
net_id=net_id)
ip_kwargs = {
"network_id": net_id,
"reuse_after": reuse_after,
"deallocated": True,
"ip_address": ip_address,
"version": version,
}
if ip_address:
del ip_kwargs["deallocated"]
if sub_ids:
ip_kwargs["subnet_id"] = sub_ids
ipam_log = kwargs.get('ipam_log', None)
for retry in xrange(CONF.QUARK.ip_address_retry_max):
attempt = None
if ipam_log:
attempt = ipam_log.make_entry("attempt_to_reallocate_ip")
LOG.info("Attempt {0} of {1}".format(
retry + 1, CONF.QUARK.ip_address_retry_max))
try:
with context.session.begin():
transaction = db_api.transaction_create(context)
m = models.IPAddress
update_kwargs = {
m.transaction_id: transaction.id,
m.address_type: kwargs.get("address_type", ip_types.FIXED),
m.deallocated: False,
m.deallocated_at: None,
m.used_by_tenant_id: context.tenant_id,
m.allocated_at: timeutils.utcnow(),
}
result = db_api.ip_address_reallocate(
elevated, update_kwargs, **ip_kwargs)
if not result:
LOG.info("Couldn't update any reallocatable addresses "
"given the criteria")
if attempt:
attempt.failed()
break
updated_address = db_api.ip_address_reallocate_find(
elevated, transaction.id)
if not updated_address:
if attempt:
attempt.failed()
continue
LOG.info("Address {0} is reallocated".format(
updated_address["address_readable"]))
return [updated_address]
except Exception:
if attempt:
attempt.failed()
LOG.exception("Error in reallocate ip...")
finally:
if attempt:
attempt.end()
return []
def _validate_subnet(self, context, s, cur_subnet=None):
"""Validate a subnet spec."""
# This method will validate attributes which may change during
# create_subnet() and update_subnet().
# The method requires the subnet spec 's' has 'ip_version' field.
# If 's' dict does not have 'ip_version' field in an API call
# (e.g., update_subnet()), you need to set 'ip_version' field
# before calling this method.
ip_ver = s['ip_version']
if attributes.is_attr_set(s.get('cidr')):
self._validate_ip_version(ip_ver, s['cidr'], 'cidr')
# TODO(watanabe.isao): After we found a way to avoid the re-sync
# from the agent side, this restriction could be removed.
if cur_subnet:
dhcp_was_enabled = cur_subnet.enable_dhcp
else:
dhcp_was_enabled = False
if s.get('enable_dhcp') and not dhcp_was_enabled:
subnet_prefixlen = netaddr.IPNetwork(s['cidr']).prefixlen
error_message = _("Subnet has a prefix length that is "
"incompatible with DHCP service enabled.")
if ((ip_ver == 4 and subnet_prefixlen > 30)
or (ip_ver == 6 and subnet_prefixlen > 126)):
raise n_exc.InvalidInput(error_message=error_message)
else:
# NOTE(watanabe.isao): The following restriction is necessary
# only when updating subnet.
if cur_subnet:
range_qry = context.session.query(
models_v2.IPAvailabilityRange).join(
models_v2.IPAllocationPool)
ip_range = range_qry.filter_by(subnet_id=s['id']).first()
if not ip_range:
raise n_exc.IpAddressGenerationFailure(
net_id=cur_subnet.network_id)
if attributes.is_attr_set(s.get('gateway_ip')):
self._validate_ip_version(ip_ver, s['gateway_ip'], 'gateway_ip')
if (cfg.CONF.force_gateway_on_subnet
and not ipam.utils.check_gateway_in_subnet(
s['cidr'], s['gateway_ip'])):
error_message = _("Gateway is not valid on subnet")
raise n_exc.InvalidInput(error_message=error_message)
# Ensure the gateway IP is not assigned to any port
# skip this check in case of create (s parameter won't have id)
# NOTE(salv-orlando): There is slight chance of a race, when
# a subnet-update and a router-interface-add operation are
# executed concurrently
if cur_subnet:
alloc_qry = context.session.query(models_v2.IPAllocation)
allocated = alloc_qry.filter_by(
ip_address=cur_subnet['gateway_ip'],
subnet_id=cur_subnet['id']).first()
if allocated and allocated['port_id']:
raise n_exc.GatewayIpInUse(
ip_address=cur_subnet['gateway_ip'],
port_id=allocated['port_id'])
if attributes.is_attr_set(s.get('dns_nameservers')):
if len(s['dns_nameservers']) > cfg.CONF.max_dns_nameservers:
raise n_exc.DNSNameServersExhausted(
subnet_id=s.get('id', _('new subnet')),
quota=cfg.CONF.max_dns_nameservers)
for dns in s['dns_nameservers']:
try:
netaddr.IPAddress(dns)
except Exception:
raise n_exc.InvalidInput(
error_message=(_("Error parsing dns address %s") %
dns))
self._validate_ip_version(ip_ver, dns, 'dns_nameserver')
if attributes.is_attr_set(s.get('host_routes')):
if len(s['host_routes']) > cfg.CONF.max_subnet_host_routes:
raise n_exc.HostRoutesExhausted(
subnet_id=s.get('id', _('new subnet')),
quota=cfg.CONF.max_subnet_host_routes)
# check if the routes are all valid
for rt in s['host_routes']:
self._validate_host_route(rt, ip_ver)
if ip_ver == 4:
if attributes.is_attr_set(s.get('ipv6_ra_mode')):
raise n_exc.InvalidInput(
error_message=(_("ipv6_ra_mode is not valid when "
"ip_version is 4")))
if attributes.is_attr_set(s.get('ipv6_address_mode')):
raise n_exc.InvalidInput(
error_message=(_("ipv6_address_mode is not valid when "
"ip_version is 4")))
if ip_ver == 6:
self._validate_ipv6_attributes(s, cur_subnet)
