def _allocate_IP():
"""
Determine next available IP for pool in input_ and assign it
"""
pool = input_json['ipam']['subnet']
candidate = SequentialAssignment().allocate(IPNetwork(pool))
print_stderr("Using IP %s" % candidate)
return candidate
def assign_ip(version):
"""
Assign a IP address from the configured pools.
:param version: 4 for IPv4, 6 for IPv6.
:return: An IPAddress, or None if an IP couldn't be
assigned
"""
ip = None
assert version in [4, 6]
# For each configured pool, attempt to assign an IP before giving up.
for pool in client.get_ip_pools(version):
assigner = SequentialAssignment()
ip = assigner.allocate(pool)
if ip is not None:
ip = IPNetwork(ip)
break
return ip
def _assign_to_pool(subnet):
"""
Take subnet (str), create IP pool in datastore if none exists.
Allocate next available IP in pool
:param subnet (str): Subnet to create pool from
:rtype: (IPPool, IPAddress)
"""
pool = IPPool(subnet)
version = IPNetwork(subnet).version
datastore_client.add_ip_pool(version, pool)
candidate = SequentialAssignment().allocate(pool)
candidate = IPAddress(candidate)
_log.info("Using Pool %s" % pool)
_log.info("Using IP %s" % candidate)
return pool, candidate
def assign_ipv4():
"""
Assign a IPv4 address from the configured pools.
:return: An IPAddress, or None if an IP couldn't be
assigned
"""
ip = None
# For each configured pool, attempt to assign an IP before giving up.
for pool in datastore.get_ip_pools("v4"):
assigner = SequentialAssignment()
ip = assigner.allocate(pool)
if ip is not None:
_log.info("Found free address %s in pool %s", ip, pool)
ip = IPAddress(ip)
break
else:
_log.error("Couldn't assign address in pool %s", pool)
return ip