def create_test_subnets(self, vpc, count_per_zone=1):
"""
This method is intended to provided the convenience of returning a number of subnets per
zone equal to the provided 'count_per_zone'. The intention is this method will
take care of first attempting to re-use existing subnets, and creating new ones if needed
to meet the count requested.
:param vpc: boto VPC object
:param count_per_zone: int, number of subnets needed per zone
:return: list of subnets
"""
test_subnets = []
for x in xrange(0, count_per_zone):
for zone in self.zones:
# Use a /24 of the vpc's larger /16
subnets = self.user.ec2.get_all_subnets(filters={'vpc-id': vpc.id})
subnet_cidr = None
attempts = 0
while subnet_cidr is None and attempts < 253:
attempts += 1
subnet_cidr = re.sub("(\d+.\d+).\d+.\d+.\d\d",
r"\1.{0}.0/24".format(attempts), vpc.cidr_block)
if not subnet_cidr:
raise ValueError('Failed to parse subnet_cidr from vpc cidr block:{0}'
.format(vpc.cidr_block))
for sub in subnets:
if sub.cidr_block == subnet_cidr or \
is_address_in_network(subnet_cidr.strip('/24'), sub.cidr_block):
self.log.info('Subnet: {0} conflicts with existing:{1}'
.format(subnet_cidr, sub.cidr_block))
subnet_cidr = None
break
try:
subnet = self.user.ec2.connection.create_subnet(vpc_id=vpc.id,
cidr_block=subnet_cidr,
availability_zone=zone)
except:
try:
self.log.error('Existing subnets during create request:')
self.user.ec2.show_subnets(subnets, printmethod=self.log.error)
except:
pass
self.log.error('Failed to create subnet for vpc:{0}, cidr:{1} zone:{2}'
.format(vpc.id, subnet_cidr, zone))
raise
self.user.ec2.create_tags(subnet.id, {self.test_tag_name: x})
test_subnets.append(subnet)
self.user.log.info('Created the following SUBNET: {0}'.format(subnet.id))
self.user.ec2.show_subnet(subnet)
return test_subnets
def create_test_subnets(self, vpc, count_per_zone=1):
test_subnets = []
for x in xrange(0, count_per_zone):
for zone in self.zones:
# Use a /24 of the vpc's larger /16
subnets = self.user.ec2.get_all_subnets(filters={"vpc-id": vpc.id})
subnet_cidr = None
attempts = 0
while subnet_cidr is None and attempts < 253:
attempts += 1
subnet_cidr = re.sub("(\d+.\d+).\d+.\d+.\d\d", r"\1.{0}.0/24".format(attempts), vpc.cidr_block)
if not subnet_cidr:
raise ValueError("Failed to parse subnet_cidr from vpc cidr block:{0}".format(vpc.cidr_block))
for sub in subnets:
if sub.cidr_block == subnet_cidr or is_address_in_network(
subnet_cidr.strip("/24"), sub.cidr_block
):
self.log.info("Subnet: {0} conflicts with existing:{1}".format(subnet_cidr, sub.cidr_block))
subnet_cidr = None
break
try:
subnet = self.user.ec2.create_subnet(vpc_id=vpc.id, cidr_block=subnet_cidr, availability_zone=zone)
except:
try:
self.log.error("Existing subnets during create request:")
self.user.ec2.show_subnets(subnets, printmethod=self.log.error)
except:
pass
self.log.error(
"Failed to create subnet for vpc:{0}, cidr:{1} zone:{2}".format(vpc.id, subnet_cidr, zone)
)
raise
self.user.ec2.create_tags(subnet.id, {self.test_tag_name: x})
test_subnets.append(subnet)
self.user.log.info("Created the following SUBNET: {0}".format(subnet.id))
self.user.ec2.show_subnet(subnet)
return test_subnets
