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remove_vpc.py
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remove_vpc.py
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"""
Remove those pesky AWS default VPCs.
Python Version: 3.7.0
Boto3 Version: 1.7.50
"""
import sys
import boto3
from botocore.exceptions import ClientError
dryrun = True
def delete_igw(ec2, vpc_id):
"""
Detach and delete the internet gateway
"""
args = {
'Filters' : [
{
'Name' : 'attachment.vpc-id',
'Values' : [ vpc_id ]
}
]
}
try:
igw = ec2.describe_internet_gateways(**args)['InternetGateways']
except ClientError as e:
print(e.response['Error']['Message'])
if igw:
igw_id = igw[0]['InternetGatewayId']
try:
if not dryrun:
print(" Detaching " + str(igw_id))
result = ec2.detach_internet_gateway(InternetGatewayId=igw_id, VpcId=vpc_id)
else:
print("(Dry-run) Detaching " + str(igw_id))
except ClientError as e:
print(e.response['Error']['Message'])
try:
if not dryrun:
print(" Deleting " + str(igw_id))
result = ec2.delete_internet_gateway(InternetGatewayId=igw_id)
else:
print("(Dry-run) Deleting " + str(igw_id))
except ClientError as e:
print(e.response['Error']['Message'])
return
def delete_subs(ec2, args):
"""
Delete the subnets
"""
try:
subs = ec2.describe_subnets(**args)['Subnets']
except ClientError as e:
print(e.response['Error']['Message'])
if subs:
for sub in subs:
sub_id = sub['SubnetId']
try:
if not dryrun:
print(" Deleting " + str(sub_id))
result = ec2.delete_subnet(SubnetId=sub_id)
else:
print("(Dry-run) Deleting " + str(sub_id))
except ClientError as e:
print(e.response['Error']['Message'])
return
def delete_rtbs(ec2, args):
"""
Delete the route tables
"""
try:
rtbs = ec2.describe_route_tables(**args)['RouteTables']
except ClientError as e:
print(e.response['Error']['Message'])
if rtbs:
for rtb in rtbs:
main = 'false'
for assoc in rtb['Associations']:
main = assoc['Main']
if main == True:
continue
rtb_id = rtb['RouteTableId']
try:
if not dryrun:
print(" Deleting " + str(rtb_id))
result = ec2.delete_route_table(RouteTableId=rtb_id)
else:
print("(Dry-run) Deleting " + str(rtb_id))
except ClientError as e:
print(e.response['Error']['Message'])
return
def delete_acls(ec2, args):
"""
Delete the network access lists (NACLs)
"""
try:
acls = ec2.describe_network_acls(**args)['NetworkAcls']
except ClientError as e:
print(e.response['Error']['Message'])
if acls:
for acl in acls:
default = acl['IsDefault']
if default == True:
continue
acl_id = acl['NetworkAclId']
try:
if not dryrun:
print(" Deleting " + str(acl_id))
result = ec2.delete_network_acl(NetworkAclId=acl_id)
else:
print("(Dry-run) Deleting " + str(acl_id))
except ClientError as e:
print(e.response['Error']['Message'])
return
def delete_sgps(ec2, args):
"""
Delete any security groups
"""
try:
sgps = ec2.describe_security_groups(**args)['SecurityGroups']
except ClientError as e:
print(e.response['Error']['Message'])
if sgps:
for sgp in sgps:
default = sgp['GroupName']
if default == 'default':
continue
sg_id = sgp['GroupId']
try:
if not dryrun:
print(" Deleting " + str(sg_id))
result = ec2.delete_security_group(GroupId=sg_id)
else:
print("(Dry-run) Deleting " + str(sg_id))
except ClientError as e:
print(e.response['Error']['Message'])
return
def delete_vpc(ec2, vpc_id, region):
"""
Delete the VPC
"""
try:
if not dryrun:
print(" Deleting " + str(vpc_id))
result = ec2.delete_vpc(VpcId=vpc_id)
else:
print("(Dry-run) Deleting " + str(vpc_id))
except ClientError as e:
print(e.response['Error']['Message'])
else:
if not dryrun:
print('VPC {} has been deleted from the {} region.'.format(vpc_id, region))
else:
print('(Dry-run) VPC {} has been deleted from the {} region.'.format(vpc_id, region))
return
def get_regions(ec2):
"""
Return all AWS regions
"""
regions = []
try:
aws_regions = ec2.describe_regions()['Regions']
except ClientError as e:
print(e.response['Error']['Message'])
else:
for region in aws_regions:
regions.append(region['RegionName'])
return regions
def main(profile):
"""
Do the work..
Order of operation:
1.) Delete the internet gateway
2.) Delete subnets
3.) Delete route tables
4.) Delete network access lists
5.) Delete security groups
6.) Delete the VPC
"""
# AWS Credentials
# https://boto3.amazonaws.com/v1/documentation/api/latest/guide/configuration.html
session = boto3.Session(profile_name=profile)
ec2 = session.client('ec2', region_name='us-east-1')
regions = get_regions(ec2)
if dryrun: print("Dry-run, not actually deleting anything")
for region in regions:
print("Scanning Region: " + str(region))
ec2 = session.client('ec2', region_name=region)
try:
attribs = ec2.describe_account_attributes(AttributeNames=[ 'default-vpc' ])['AccountAttributes']
except ClientError as e:
print(e.response['Error']['Message'])
return
else:
vpc_id = attribs[0]['AttributeValues'][0]['AttributeValue']
if vpc_id == 'none':
print('VPC (default) was not found in the {} region.'.format(region))
continue
if dryrun:
print("(Dry-run) Removing VPC: " + str(vpc_id))
else:
print(" Removing VPC: " + str(vpc_id))
# Are there any existing resources? Since most resources attach an ENI, let's check..
args = {
'Filters' : [
{
'Name' : 'vpc-id',
'Values' : [ vpc_id ]
}
]
}
try:
eni = ec2.describe_network_interfaces(**args)['NetworkInterfaces']
except ClientError as e:
print(e.response['Error']['Message'])
return
if eni:
print(' VPC {} has existing resources in the {} region.'.format(vpc_id, region))
continue
result = delete_igw(ec2, vpc_id)
result = delete_subs(ec2, args)
result = delete_rtbs(ec2, args)
result = delete_acls(ec2, args)
result = delete_sgps(ec2, args)
result = delete_vpc(ec2, vpc_id, region)
return
if __name__ == "__main__":
if ( len(sys.argv) == 2):
dryrun = True
main(profile=sys.argv[1])
elif ( len(sys.argv) == 3):
dryrun = (sys.argv[2].upper() == "TRUE")
main(profile=sys.argv[1])
else:
print("Usage: python3 remove_vpc.py <profilename> <dryrun>")
print("Usage: python3 remove_vpc.py development True")
print("Usage: python3 remove_vpc.py development False")
print("Usage: NOTE: dryrun defaults to True if excluded")