moto/tests/test_ec2/test_subnets.py

858 lines
31 KiB
Python

import random
import boto3
import pytest
import sure # noqa # pylint: disable=unused-import
from botocore.exceptions import ClientError
from moto import mock_ec2, settings
from tests import EXAMPLE_AMI_ID
from uuid import uuid4
from unittest import SkipTest
@mock_ec2
def test_subnets():
ec2 = boto3.resource("ec2", region_name="us-east-1")
client = boto3.client("ec2", region_name="us-east-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnet = ec2.create_subnet(VpcId=vpc.id, CidrBlock="10.0.0.0/18")
ours = client.describe_subnets(SubnetIds=[subnet.id])["Subnets"]
ours.should.have.length_of(1)
client.delete_subnet(SubnetId=subnet.id)
with pytest.raises(ClientError) as ex:
client.describe_subnets(SubnetIds=[subnet.id])
err = ex.value.response["Error"]
err["Code"].should.equal("InvalidSubnetID.NotFound")
with pytest.raises(ClientError) as ex:
client.delete_subnet(SubnetId=subnet.id)
ex.value.response["ResponseMetadata"]["HTTPStatusCode"].should.equal(400)
ex.value.response["ResponseMetadata"].should.have.key("RequestId")
ex.value.response["Error"]["Code"].should.equal("InvalidSubnetID.NotFound")
@mock_ec2
def test_subnet_create_vpc_validation():
ec2 = boto3.resource("ec2", region_name="us-east-1")
with pytest.raises(ClientError) as ex:
ec2.create_subnet(VpcId="vpc-abcd1234", CidrBlock="10.0.0.0/18")
ex.value.response["ResponseMetadata"]["HTTPStatusCode"].should.equal(400)
ex.value.response["ResponseMetadata"].should.have.key("RequestId")
ex.value.response["Error"]["Code"].should.equal("InvalidVpcID.NotFound")
@mock_ec2
def test_subnet_tagging():
ec2 = boto3.resource("ec2", region_name="us-east-1")
client = boto3.client("ec2", region_name="us-east-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnet = ec2.create_subnet(VpcId=vpc.id, CidrBlock="10.0.0.0/18")
subnet.create_tags(Tags=[{"Key": "a key", "Value": "some value"}])
tag = client.describe_tags(
Filters=[{"Name": "resource-id", "Values": [subnet.id]}]
)["Tags"][0]
tag["Key"].should.equal("a key")
tag["Value"].should.equal("some value")
# Refresh the subnet
subnet = client.describe_subnets(SubnetIds=[subnet.id])["Subnets"][0]
subnet["Tags"].should.equal([{"Key": "a key", "Value": "some value"}])
@mock_ec2
def test_subnet_should_have_proper_availability_zone_set():
ec2 = boto3.resource("ec2", region_name="us-west-1")
vpcA = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnetA = ec2.create_subnet(
VpcId=vpcA.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1b"
)
subnetA.availability_zone.should.equal("us-west-1b")
@mock_ec2
def test_availability_zone_in_create_subnet():
ec2 = boto3.resource("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="172.31.0.0/16")
subnet = ec2.create_subnet(
VpcId=vpc.id, CidrBlock="172.31.48.0/20", AvailabilityZoneId="use1-az6"
)
subnet.availability_zone_id.should.equal("use1-az6")
@mock_ec2
def test_default_subnet():
if settings.TEST_SERVER_MODE:
raise SkipTest("ServerMode will have conflicting CidrBlocks")
ec2 = boto3.resource("ec2", region_name="us-west-1")
default_vpc = list(ec2.vpcs.all())[0]
default_vpc.cidr_block.should.equal("172.31.0.0/16")
default_vpc.reload()
default_vpc.is_default.should.equal(True)
subnet = ec2.create_subnet(
VpcId=default_vpc.id, CidrBlock="172.31.48.0/20", AvailabilityZone="us-west-1a"
)
subnet.reload()
subnet.map_public_ip_on_launch.should.equal(False)
@mock_ec2
def test_non_default_subnet():
ec2 = boto3.resource("ec2", region_name="us-west-1")
# Create the non default VPC
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
vpc.reload()
vpc.is_default.should.equal(False)
subnet = ec2.create_subnet(
VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
subnet.reload()
subnet.map_public_ip_on_launch.should.equal(False)
@mock_ec2
def test_modify_subnet_attribute_public_ip_on_launch():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
random_ip = ".".join(map(str, (random.randint(0, 99) for _ in range(4))))
vpc = ec2.create_vpc(CidrBlock=f"{random_ip}/16")
random_subnet_cidr = f"{random_ip}/20" # Same block as the VPC
subnet = ec2.create_subnet(
VpcId=vpc.id, CidrBlock=random_subnet_cidr, AvailabilityZone="us-west-1a"
)
# 'map_public_ip_on_launch' is set when calling 'DescribeSubnets' action
subnet.reload()
# For non default subnet, attribute value should be 'False'
subnet.map_public_ip_on_launch.should.equal(False)
client.modify_subnet_attribute(
SubnetId=subnet.id, MapPublicIpOnLaunch={"Value": False}
)
subnet.reload()
subnet.map_public_ip_on_launch.should.equal(False)
client.modify_subnet_attribute(
SubnetId=subnet.id, MapPublicIpOnLaunch={"Value": True}
)
subnet.reload()
subnet.map_public_ip_on_launch.should.equal(True)
@mock_ec2
def test_modify_subnet_attribute_assign_ipv6_address_on_creation():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
random_ip = ".".join(map(str, (random.randint(0, 99) for _ in range(4))))
vpc = ec2.create_vpc(CidrBlock=f"{random_ip}/16")
random_subnet_cidr = f"{random_ip}/20" # Same block as the VPC
subnet = ec2.create_subnet(
VpcId=vpc.id, CidrBlock=random_subnet_cidr, AvailabilityZone="us-west-1a"
)
# 'map_public_ip_on_launch' is set when calling 'DescribeSubnets' action
subnet.reload()
client.describe_subnets()
# For non default subnet, attribute value should be 'False'
subnet.assign_ipv6_address_on_creation.should.equal(False)
client.modify_subnet_attribute(
SubnetId=subnet.id, AssignIpv6AddressOnCreation={"Value": False}
)
subnet.reload()
subnet.assign_ipv6_address_on_creation.should.equal(False)
client.modify_subnet_attribute(
SubnetId=subnet.id, AssignIpv6AddressOnCreation={"Value": True}
)
subnet.reload()
subnet.assign_ipv6_address_on_creation.should.equal(True)
@mock_ec2
def test_modify_subnet_attribute_validation():
# TODO: implement some actual logic
ec2 = boto3.resource("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
ec2.create_subnet(
VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
@mock_ec2
def test_subnet_get_by_id():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpcA = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnetA = ec2.create_subnet(
VpcId=vpcA.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
vpcB = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnetB1 = ec2.create_subnet(
VpcId=vpcB.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
ec2.create_subnet(
VpcId=vpcB.id, CidrBlock="10.0.1.0/24", AvailabilityZone="us-west-1b"
)
subnets_by_id = client.describe_subnets(SubnetIds=[subnetA.id, subnetB1.id])[
"Subnets"
]
subnets_by_id.should.have.length_of(2)
subnets_by_id = tuple(map(lambda s: s["SubnetId"], subnets_by_id))
subnetA.id.should.be.within(subnets_by_id)
subnetB1.id.should.be.within(subnets_by_id)
with pytest.raises(ClientError) as ex:
client.describe_subnets(SubnetIds=["subnet-does_not_exist"])
ex.value.response["ResponseMetadata"]["HTTPStatusCode"].should.equal(400)
ex.value.response["ResponseMetadata"].should.have.key("RequestId")
ex.value.response["Error"]["Code"].should.equal("InvalidSubnetID.NotFound")
@mock_ec2
def test_get_subnets_filtering():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpcA = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnetA = ec2.create_subnet(
VpcId=vpcA.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
vpcB = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnetB1 = ec2.create_subnet(
VpcId=vpcB.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
subnetB2 = ec2.create_subnet(
VpcId=vpcB.id, CidrBlock="10.0.1.0/24", AvailabilityZone="us-west-1b"
)
nr_of_a_zones = len(client.describe_availability_zones()["AvailabilityZones"])
all_subnets = client.describe_subnets()["Subnets"]
if settings.TEST_SERVER_MODE:
# ServerMode may have other tests running that are creating subnets
all_subnet_ids = [s["SubnetId"] for s in all_subnets]
all_subnet_ids.should.contain(subnetA.id)
all_subnet_ids.should.contain(subnetB1.id)
all_subnet_ids.should.contain(subnetB2.id)
else:
all_subnets.should.have.length_of(3 + nr_of_a_zones)
# Filter by VPC ID
subnets_by_vpc = client.describe_subnets(
Filters=[{"Name": "vpc-id", "Values": [vpcB.id]}]
)["Subnets"]
subnets_by_vpc.should.have.length_of(2)
set([subnet["SubnetId"] for subnet in subnets_by_vpc]).should.equal(
set([subnetB1.id, subnetB2.id])
)
# Filter by CIDR variations
subnets_by_cidr1 = client.describe_subnets(
Filters=[{"Name": "cidr", "Values": ["10.0.0.0/24"]}]
)["Subnets"]
subnets_by_cidr1 = [s["SubnetId"] for s in subnets_by_cidr1]
subnets_by_cidr1.should.contain(subnetA.id)
subnets_by_cidr1.should.contain(subnetB1.id)
subnets_by_cidr1.shouldnt.contain(subnetB2.id)
subnets_by_cidr2 = client.describe_subnets(
Filters=[{"Name": "cidr-block", "Values": ["10.0.0.0/24"]}]
)["Subnets"]
subnets_by_cidr2 = [s["SubnetId"] for s in subnets_by_cidr2]
subnets_by_cidr2.should.contain(subnetA.id)
subnets_by_cidr2.should.contain(subnetB1.id)
subnets_by_cidr2.shouldnt.contain(subnetB2.id)
subnets_by_cidr3 = client.describe_subnets(
Filters=[{"Name": "cidrBlock", "Values": ["10.0.0.0/24"]}]
)["Subnets"]
subnets_by_cidr3 = [s["SubnetId"] for s in subnets_by_cidr3]
subnets_by_cidr3.should.contain(subnetA.id)
subnets_by_cidr3.should.contain(subnetB1.id)
subnets_by_cidr3.shouldnt.contain(subnetB2.id)
# Filter by VPC ID and CIDR
subnets_by_vpc_and_cidr = client.describe_subnets(
Filters=[
{"Name": "vpc-id", "Values": [vpcB.id]},
{"Name": "cidr", "Values": ["10.0.0.0/24"]},
]
)["Subnets"]
subnets_by_vpc_and_cidr.should.have.length_of(1)
subnets_by_vpc_and_cidr[0]["SubnetId"].should.equal(subnetB1.id)
# Filter by subnet ID
subnets_by_id = client.describe_subnets(
Filters=[{"Name": "subnet-id", "Values": [subnetA.id]}]
)["Subnets"]
subnets_by_id.should.have.length_of(1)
subnets_by_id[0]["SubnetId"].should.equal(subnetA.id)
# Filter by availabilityZone
subnets_by_az = client.describe_subnets(
Filters=[
{"Name": "availabilityZone", "Values": ["us-west-1a"]},
{"Name": "vpc-id", "Values": [vpcB.id]},
]
)["Subnets"]
subnets_by_az.should.have.length_of(1)
subnets_by_az[0]["SubnetId"].should.equal(subnetB1.id)
if not settings.TEST_SERVER_MODE:
# Filter by defaultForAz
subnets_by_az = client.describe_subnets(
Filters=[{"Name": "defaultForAz", "Values": ["true"]}]
)["Subnets"]
subnets_by_az.should.have.length_of(nr_of_a_zones)
# Unsupported filter
filters = [{"Name": "not-implemented-filter", "Values": ["foobar"]}]
client.describe_subnets.when.called_with(Filters=filters).should.throw(
NotImplementedError
)
@mock_ec2
def test_create_subnet_response_fields():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnet = client.create_subnet(
VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)["Subnet"]
subnet.should.have.key("AvailabilityZone")
subnet.should.have.key("AvailabilityZoneId")
subnet.should.have.key("AvailableIpAddressCount")
subnet.should.have.key("CidrBlock")
subnet.should.have.key("State")
subnet.should.have.key("SubnetId")
subnet.should.have.key("VpcId")
subnet.should.have.key("Tags")
subnet.should.have.key("DefaultForAz").which.should.equal(False)
subnet.should.have.key("MapPublicIpOnLaunch").which.should.equal(False)
subnet.should.have.key("OwnerId")
subnet.should.have.key("AssignIpv6AddressOnCreation").which.should.equal(False)
subnet.should.have.key("Ipv6Native").which.should.equal(False)
subnet_arn = "arn:aws:ec2:{region}:{owner_id}:subnet/{subnet_id}".format(
region=subnet["AvailabilityZone"][0:-1],
owner_id=subnet["OwnerId"],
subnet_id=subnet["SubnetId"],
)
subnet.should.have.key("SubnetArn").which.should.equal(subnet_arn)
subnet.should.have.key("Ipv6CidrBlockAssociationSet").which.should.equal([])
@mock_ec2
def test_describe_subnet_response_fields():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnet_object = ec2.create_subnet(
VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
subnets = client.describe_subnets(SubnetIds=[subnet_object.id])["Subnets"]
subnets.should.have.length_of(1)
subnet = subnets[0]
subnet.should.have.key("AvailabilityZone")
subnet.should.have.key("AvailabilityZoneId")
subnet.should.have.key("AvailableIpAddressCount")
subnet.should.have.key("CidrBlock")
subnet.should.have.key("State")
subnet.should.have.key("SubnetId")
subnet.should.have.key("VpcId")
subnet.shouldnt.have.key("Tags")
subnet.should.have.key("DefaultForAz").which.should.equal(False)
subnet.should.have.key("MapPublicIpOnLaunch").which.should.equal(False)
subnet.should.have.key("OwnerId")
subnet.should.have.key("AssignIpv6AddressOnCreation").which.should.equal(False)
subnet.should.have.key("Ipv6Native").which.should.equal(False)
subnet_arn = "arn:aws:ec2:{region}:{owner_id}:subnet/{subnet_id}".format(
region=subnet["AvailabilityZone"][0:-1],
owner_id=subnet["OwnerId"],
subnet_id=subnet["SubnetId"],
)
subnet.should.have.key("SubnetArn").which.should.equal(subnet_arn)
subnet.should.have.key("Ipv6CidrBlockAssociationSet").which.should.equal([])
@mock_ec2
def test_create_subnet_with_invalid_availability_zone():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnet_availability_zone = "asfasfas"
with pytest.raises(ClientError) as ex:
client.create_subnet(
VpcId=vpc.id,
CidrBlock="10.0.0.0/24",
AvailabilityZone=subnet_availability_zone,
)
assert str(ex.value).startswith(
"An error occurred (InvalidParameterValue) when calling the CreateSubnet "
"operation: Value ({}) for parameter availabilityZone is invalid. Subnets can currently only be created in the following availability zones: ".format(
subnet_availability_zone
)
)
@mock_ec2
def test_create_subnet_with_invalid_cidr_range():
ec2 = boto3.resource("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
vpc.reload()
vpc.is_default.should.equal(False)
subnet_cidr_block = "10.1.0.0/20"
with pytest.raises(ClientError) as ex:
ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
str(ex.value).should.equal(
"An error occurred (InvalidSubnet.Range) when calling the CreateSubnet "
"operation: The CIDR '{}' is invalid.".format(subnet_cidr_block)
)
@mock_ec2
def test_create_subnet_with_invalid_cidr_range_multiple_vpc_cidr_blocks():
ec2 = boto3.resource("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
ec2.meta.client.associate_vpc_cidr_block(CidrBlock="10.1.0.0/16", VpcId=vpc.id)
vpc.reload()
vpc.is_default.should.equal(False)
subnet_cidr_block = "10.2.0.0/20"
with pytest.raises(ClientError) as ex:
ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
str(ex.value).should.equal(
"An error occurred (InvalidSubnet.Range) when calling the CreateSubnet "
"operation: The CIDR '{}' is invalid.".format(subnet_cidr_block)
)
@mock_ec2
def test_create_subnet_with_invalid_cidr_block_parameter():
ec2 = boto3.resource("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
vpc.reload()
vpc.is_default.should.equal(False)
subnet_cidr_block = "1000.1.0.0/20"
with pytest.raises(ClientError) as ex:
ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
str(ex.value).should.equal(
"An error occurred (InvalidParameterValue) when calling the CreateSubnet "
"operation: Value ({}) for parameter cidrBlock is invalid. This is not a valid CIDR block.".format(
subnet_cidr_block
)
)
@mock_ec2
def test_create_subnets_with_multiple_vpc_cidr_blocks():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
ec2.meta.client.associate_vpc_cidr_block(CidrBlock="10.1.0.0/16", VpcId=vpc.id)
vpc.reload()
vpc.is_default.should.equal(False)
subnet_cidr_block_primary = "10.0.0.0/24"
subnet_primary = ec2.create_subnet(
VpcId=vpc.id, CidrBlock=subnet_cidr_block_primary
)
subnet_cidr_block_secondary = "10.1.0.0/24"
subnet_secondary = ec2.create_subnet(
VpcId=vpc.id, CidrBlock=subnet_cidr_block_secondary
)
subnets = client.describe_subnets(
SubnetIds=[subnet_primary.id, subnet_secondary.id]
)["Subnets"]
subnets.should.have.length_of(2)
for subnet in subnets:
subnet.should.have.key("AvailabilityZone")
subnet.should.have.key("AvailabilityZoneId")
subnet.should.have.key("AvailableIpAddressCount")
subnet.should.have.key("CidrBlock")
subnet.should.have.key("State")
subnet.should.have.key("SubnetId")
subnet.should.have.key("VpcId")
subnet.shouldnt.have.key("Tags")
subnet.should.have.key("DefaultForAz").which.should.equal(False)
subnet.should.have.key("MapPublicIpOnLaunch").which.should.equal(False)
subnet.should.have.key("OwnerId")
subnet.should.have.key("AssignIpv6AddressOnCreation").which.should.equal(False)
@mock_ec2
def test_create_subnets_with_overlapping_cidr_blocks():
ec2 = boto3.resource("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
vpc.reload()
vpc.is_default.should.equal(False)
subnet_cidr_block = "10.0.0.0/24"
with pytest.raises(ClientError) as ex:
ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
str(ex.value).should.equal(
"An error occurred (InvalidSubnet.Conflict) when calling the CreateSubnet "
"operation: The CIDR '{}' conflicts with another subnet".format(
subnet_cidr_block
)
)
@mock_ec2
def test_create_subnet_with_tags():
ec2 = boto3.resource("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="172.31.0.0/16")
random_ip = "172.31." + ".".join(
map(str, (random.randint(10, 40) for _ in range(2)))
)
random_cidr = f"{random_ip}/20"
subnet = ec2.create_subnet(
VpcId=vpc.id,
CidrBlock=random_cidr,
AvailabilityZoneId="use1-az6",
TagSpecifications=[
{"ResourceType": "subnet", "Tags": [{"Key": "name", "Value": "some-vpc"}]}
],
)
assert subnet.tags == [{"Key": "name", "Value": "some-vpc"}]
@mock_ec2
def test_available_ip_addresses_in_subnet():
if settings.TEST_SERVER_MODE:
raise SkipTest(
"ServerMode is not guaranteed to be empty - other subnets will affect the count"
)
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
cidr_range_addresses = [
("10.0.0.0/16", 65531),
("10.0.0.0/17", 32763),
("10.0.0.0/18", 16379),
("10.0.0.0/19", 8187),
("10.0.0.0/20", 4091),
("10.0.0.0/21", 2043),
("10.0.0.0/22", 1019),
("10.0.0.0/23", 507),
("10.0.0.0/24", 251),
("10.0.0.0/25", 123),
("10.0.0.0/26", 59),
("10.0.0.0/27", 27),
("10.0.0.0/28", 11),
]
for (cidr, expected_count) in cidr_range_addresses:
validate_subnet_details(client, vpc, cidr, expected_count)
@mock_ec2
def test_available_ip_addresses_in_subnet_with_enis():
if settings.TEST_SERVER_MODE:
raise SkipTest(
"ServerMode is not guaranteed to be empty - other ENI's will affect the count"
)
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
# Verify behaviour for various CIDR ranges (...)
# Don't try to assign ENIs to /27 and /28, as there are not a lot of IP addresses to go around
cidr_range_addresses = [
("10.0.0.0/16", 65531),
("10.0.0.0/17", 32763),
("10.0.0.0/18", 16379),
("10.0.0.0/19", 8187),
("10.0.0.0/20", 4091),
("10.0.0.0/21", 2043),
("10.0.0.0/22", 1019),
("10.0.0.0/23", 507),
("10.0.0.0/24", 251),
("10.0.0.0/25", 123),
("10.0.0.0/26", 59),
]
for (cidr, expected_count) in cidr_range_addresses:
validate_subnet_details_after_creating_eni(client, vpc, cidr, expected_count)
def validate_subnet_details(client, vpc, cidr, expected_ip_address_count):
subnet = client.create_subnet(
VpcId=vpc.id, CidrBlock=cidr, AvailabilityZone="us-west-1b"
)["Subnet"]
subnet["AvailableIpAddressCount"].should.equal(expected_ip_address_count)
client.delete_subnet(SubnetId=subnet["SubnetId"])
def validate_subnet_details_after_creating_eni(
client, vpc, cidr, expected_ip_address_count
):
subnet = client.create_subnet(
VpcId=vpc.id, CidrBlock=cidr, AvailabilityZone="us-west-1b"
)["Subnet"]
# Create a random number of Elastic Network Interfaces
nr_of_eni_to_create = random.randint(0, 5)
ip_addresses_assigned = 0
enis_created = []
for _ in range(0, nr_of_eni_to_create):
# Create a random number of IP addresses per ENI
nr_of_ip_addresses = random.randint(1, 5)
if nr_of_ip_addresses == 1:
# Pick the first available IP address (First 4 are reserved by AWS)
private_address = "10.0.0." + str(ip_addresses_assigned + 4)
eni = client.create_network_interface(
SubnetId=subnet["SubnetId"], PrivateIpAddress=private_address
)["NetworkInterface"]
enis_created.append(eni)
ip_addresses_assigned = ip_addresses_assigned + 1
else:
# Assign a list of IP addresses
private_addresses = [
"10.0.0." + str(4 + ip_addresses_assigned + i)
for i in range(0, nr_of_ip_addresses)
]
eni = client.create_network_interface(
SubnetId=subnet["SubnetId"],
PrivateIpAddresses=[
{"PrivateIpAddress": address} for address in private_addresses
],
)["NetworkInterface"]
enis_created.append(eni)
ip_addresses_assigned = ip_addresses_assigned + nr_of_ip_addresses #
# Verify that the nr of available IP addresses takes these ENIs into account
updated_subnet = client.describe_subnets(SubnetIds=[subnet["SubnetId"]])["Subnets"][
0
]
private_addresses = []
for eni in enis_created:
private_addresses.extend(
[address["PrivateIpAddress"] for address in eni["PrivateIpAddresses"]]
)
error_msg = (
"Nr of IP addresses for Subnet with CIDR {0} is incorrect. Expected: {1}, Actual: {2}. "
"Addresses: {3}"
)
with sure.ensure(
error_msg,
cidr,
str(expected_ip_address_count),
updated_subnet["AvailableIpAddressCount"],
str(private_addresses),
):
updated_subnet["AvailableIpAddressCount"].should.equal(
expected_ip_address_count - ip_addresses_assigned
)
# Clean up, as we have to create a few more subnets that shouldn't interfere with each other
for eni in enis_created:
client.delete_network_interface(NetworkInterfaceId=eni["NetworkInterfaceId"])
client.delete_subnet(SubnetId=subnet["SubnetId"])
@mock_ec2
def test_run_instances_should_attach_to_default_subnet():
# https://github.com/spulec/moto/issues/2877
ec2 = boto3.resource("ec2", region_name="sa-east-1")
client = boto3.client("ec2", region_name="sa-east-1")
sec_group_name = str(uuid4())[0:6]
ec2.create_security_group(
GroupName=sec_group_name, Description="Test security group sg01"
)
# run_instances
instances = client.run_instances(
ImageId=EXAMPLE_AMI_ID, MinCount=1, MaxCount=1, SecurityGroups=[sec_group_name]
)
# Assert subnet is created appropriately
subnets = client.describe_subnets(
Filters=[{"Name": "defaultForAz", "Values": ["true"]}]
)["Subnets"]
default_subnet_id = subnets[0]["SubnetId"]
if len(subnets) > 1:
default_subnet_id1 = subnets[1]["SubnetId"]
assert (
instances["Instances"][0]["NetworkInterfaces"][0]["SubnetId"]
== default_subnet_id
or instances["Instances"][0]["NetworkInterfaces"][0]["SubnetId"]
== default_subnet_id1
)
if not settings.TEST_SERVER_MODE:
# Available IP addresses will depend on other resources that might be created in parallel
assert (
subnets[0]["AvailableIpAddressCount"] == 4090
or subnets[1]["AvailableIpAddressCount"] == 4090
)
@mock_ec2
def test_describe_subnets_by_vpc_id():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc1 = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnet1 = ec2.create_subnet(
VpcId=vpc1.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
vpc2 = ec2.create_vpc(CidrBlock="172.31.0.0/16")
subnet2 = ec2.create_subnet(
VpcId=vpc2.id, CidrBlock="172.31.48.0/20", AvailabilityZone="us-west-1b"
)
subnets = client.describe_subnets(
Filters=[{"Name": "vpc-id", "Values": [vpc1.id]}]
).get("Subnets", [])
subnets.should.have.length_of(1)
subnets[0]["SubnetId"].should.equal(subnet1.id)
subnets = client.describe_subnets(
Filters=[{"Name": "vpc-id", "Values": [vpc2.id]}]
).get("Subnets", [])
subnets.should.have.length_of(1)
subnets[0]["SubnetId"].should.equal(subnet2.id)
# Specify multiple VPCs in Filter.
subnets = client.describe_subnets(
Filters=[{"Name": "vpc-id", "Values": [vpc1.id, vpc2.id]}]
).get("Subnets", [])
subnets.should.have.length_of(2)
# Specify mismatched SubnetIds/Filters.
subnets = client.describe_subnets(
SubnetIds=[subnet1.id], Filters=[{"Name": "vpc-id", "Values": [vpc2.id]}]
).get("Subnets", [])
subnets.should.have.length_of(0)
@mock_ec2
def test_describe_subnets_by_state():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
ec2.create_subnet(
VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
subnets = client.describe_subnets(
Filters=[{"Name": "state", "Values": ["available"]}]
).get("Subnets", [])
for subnet in subnets:
subnet["State"].should.equal("available")
@mock_ec2
def test_associate_subnet_cidr_block():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnet_object = ec2.create_subnet(
VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
subnets = client.describe_subnets(SubnetIds=[subnet_object.id])["Subnets"]
association_set = subnets[0]["Ipv6CidrBlockAssociationSet"]
association_set.should.equal([])
res = client.associate_subnet_cidr_block(
Ipv6CidrBlock="1080::1:200C:417A/112", SubnetId=subnet_object.id
)
res.should.have.key("Ipv6CidrBlockAssociation")
association = res["Ipv6CidrBlockAssociation"]
association.should.have.key("AssociationId").match("subnet-cidr-assoc-[a-z0-9]+")
association.should.have.key("Ipv6CidrBlock").equals("1080::1:200C:417A/112")
association.should.have.key("Ipv6CidrBlockState").equals({"State": "associated"})
subnets = client.describe_subnets(SubnetIds=[subnet_object.id])["Subnets"]
association_set = subnets[0]["Ipv6CidrBlockAssociationSet"]
association_set.should.have.length_of(1)
association_set[0].should.have.key("AssociationId").equal(
association["AssociationId"]
)
association_set[0].should.have.key("Ipv6CidrBlock").equals("1080::1:200C:417A/112")
@mock_ec2
def test_disassociate_subnet_cidr_block():
ec2 = boto3.resource("ec2", region_name="us-west-1")
client = boto3.client("ec2", region_name="us-west-1")
vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
subnet_object = ec2.create_subnet(
VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
)
client.associate_subnet_cidr_block(
Ipv6CidrBlock="1080::1:200C:417A/111", SubnetId=subnet_object.id
)
association_id = client.associate_subnet_cidr_block(
Ipv6CidrBlock="1080::1:200C:417A/999", SubnetId=subnet_object.id
)["Ipv6CidrBlockAssociation"]["AssociationId"]
subnets = client.describe_subnets(SubnetIds=[subnet_object.id])["Subnets"]
association_set = subnets[0]["Ipv6CidrBlockAssociationSet"]
association_set.should.have.length_of(2)
client.disassociate_subnet_cidr_block(AssociationId=association_id)
subnets = client.describe_subnets(SubnetIds=[subnet_object.id])["Subnets"]
association_set = subnets[0]["Ipv6CidrBlockAssociationSet"]
association_set.should.have.length_of(1)
association_set[0]["Ipv6CidrBlock"].should.equal("1080::1:200C:417A/111")
@mock_ec2
def test_describe_subnets_dryrun():
client = boto3.client("ec2", region_name="us-east-1")
with pytest.raises(ClientError) as ex:
client.describe_subnets(DryRun=True)
ex.value.response["ResponseMetadata"]["HTTPStatusCode"].should.equal(412)
ex.value.response["Error"]["Code"].should.equal("DryRunOperation")
ex.value.response["Error"]["Message"].should.equal(
"An error occurred (DryRunOperation) when calling the DescribeSubnets operation: Request would have succeeded, but DryRun flag is set"
)