def _assure_subnet_snats(self, assure_bigips, service, subnetinfo):
# Ensure snat for subnet exists on bigips
tenant_id = service['loadbalancer']['tenant_id']
subnet = subnetinfo['subnet']
snats_per_subnet = self.conf.f5_snat_addresses_per_subnet
lb_id = service['loadbalancer']['id']
assure_bigips = \
[bigip for bigip in assure_bigips
if tenant_id not in bigip.assured_tenant_snat_subnets or
subnet['id'] not in
bigip.assured_tenant_snat_subnets[tenant_id]]
LOG.debug("_assure_subnet_snats: getting snat addrs for: %s" %
subnet['id'])
if len(assure_bigips):
snat_addrs = self.bigip_snat_manager.get_snat_addrs(
subnetinfo, tenant_id, snats_per_subnet, lb_id)
if len(snat_addrs) != snats_per_subnet:
raise f5_ex.SNATCreationException(
"Unable to satisfy request to allocate %d "
"snats. Actual SNAT count: %d SNATs" %
(snats_per_subnet, len(snat_addrs)))
for assure_bigip in assure_bigips:
self.bigip_snat_manager.assure_bigip_snats(
assure_bigip, subnetinfo, snat_addrs, tenant_id)
def _assure_bigip_snats(self, bigip, subnetinfo, snat_info, tenant_id):
# Configure the ip addresses for snat
network = subnetinfo['network']
subnet = subnetinfo['subnet']
if tenant_id not in bigip.assured_tenant_snat_subnets:
bigip.assured_tenant_snat_subnets[tenant_id] = []
if subnet['id'] in bigip.assured_tenant_snat_subnets[tenant_id]:
return
snat_name = self._get_snat_name(subnet, tenant_id)
for i, snat_address in enumerate(snat_info['addrs']):
ip_address = snat_address + \
'%' + str(network['route_domain_id'])
index_snat_name = snat_name + "_" + str(i)
snat_traffic_group = self._get_snat_traffic_group(tenant_id)
# snat.create() did the following in LBaaSv1
# Creates the SNAT
# * if the traffic_group is empty it uses a const
# but this seems like it should be an error see message
# in this file about this
# Create a SNAT Pool if a name was passed in
# * Add the snat to the list of members
model = {
"name": index_snat_name,
"partition": snat_info['network_folder'],
"address": ip_address,
"trafficGroup": snat_traffic_group
}
try:
if not self.snat_translation_manager.exists(
bigip,
name=index_snat_name,
partition=snat_info['network_folder']):
self.snat_translation_manager.create(bigip, model)
except Exception as err:
LOG.exception(err)
raise f5_ex.SNATCreationException(
"Error creating snat translation manager %s" %
index_snat_name)
model = {
"name": snat_info['pool_name'],
"partition": snat_info['network_folder'],
}
snatpool_member = ('/' + model["partition"] + '/' +
index_snat_name)
model["members"] = [snatpool_member]
try:
if not self.snatpool_manager.exists(
bigip,
name=model['name'],
partition=model['partition']):
LOG.debug("Creating SNAT pool: %s" % model)
self.snatpool_manager.create(bigip, model)
else:
LOG.debug("Updating SNAT pool")
snatpool = self.snatpool_manager.load(
bigip,
name=model["name"],
partition=model["partition"]
)
snatpool.members.append(snatpool_member)
snatpool.modify(members=snatpool.members)
except Exception as err:
LOG.error("Create SNAT pool failed %s" % err.message)
raise f5_ex.SNATCreationException(
"Failed to create SNAT pool")
if self.l3_binding:
self.l3_binding.bind_address(subnet_id=subnet['id'],
ip_address=ip_address)
bigip.assured_tenant_snat_subnets[tenant_id].append(subnet['id'])