def allocate_ip_from_pools(pool_rows, userid, address=None, floating_ip=False):
"""Try to allocate a value from a number of pools.
This function takes as argument a number of PoolTable objects and tries to
allocate a value from them. If all pools are empty EmptyPool is raised.
If an address is specified and does not belong to any of the pools,
InvalidValue is raised.
"""
for pool_row in pool_rows:
pool = pool_row.pool
try:
value = pool.get(value=address)
pool.save()
subnet = pool_row.subnet
ipaddress = IPAddress.objects.create(subnet=subnet,
network=subnet.network,
userid=userid,
address=value,
floating_ip=floating_ip,
ipversion=4)
return ipaddress
except pools.EmptyPool:
pass
except pools.InvalidValue:
pass
if address is None:
raise pools.EmptyPool("No more IP addresses available on pools %s" %
pool_rows)
else:
raise pools.InvalidValue("Address %s does not belong to pools %s" %
(address, pool_rows))
def release_address(self, address, external=False):
for ip_pool in self.get_ip_pools():
if ip_pool.contains(address):
ip_pool.put(address, external=external)
ip_pool.save()
return
raise pools.InvalidValue("Network %s does not have an IP pool that"
" contains address %s" % (self, address))