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@jezhumble
Last active October 9, 2019 05:52
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List EC2, RDS and ElastiCache instances, grouped by VPC
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import argparse, sys, boto3
from colorama import Fore, Style
def count(my_list, my_key):
if my_key not in my_list:
return '0'
else:
return str(len(my_list[my_key]))
def append(my_list, my_key, my_value):
if my_key not in my_list:
my_list[my_key] = [ my_value ]
else:
my_list[my_key].append(my_value)
parser = argparse.ArgumentParser(description='List EC2, RDS and ElastiCache instances, grouped by VPC.')
parser.add_argument('--aws-key', dest='aws_key', help='AWS Key')
parser.add_argument('--aws-secret-key', dest='aws_secret_key', help='AWS Secret Key')
parser.add_argument('--region', dest='region', help='Limit to a single region')
args = parser.parse_args()
if args.aws_key and args.aws_secret_key:
session = boto3.Session(aws_access_key_id=args.aws_key, aws_secret_access_key=args.aws_secret_key)
else:
session = boto3.Session()
regions = session.get_available_regions('ec2')
for region in regions:
print("Region: " + region)
if (not args.region) or (args.region == region):
ec2client = session.client('ec2', region)
rdsclient = session.client('rds', region)
cacheclient = session.client('elasticache', region)
instances = {}
dbs = {}
caches = {}
cache_subnets = {}
ec2_instances = ec2client.describe_instances(Filters=[ { 'Name': 'instance-state-name', 'Values': [ 'running' ] } ])
for reservation in ec2_instances['Reservations']:
for instance in reservation['Instances']:
instance_name = instance['InstanceId']
for tag in instance['Tags']:
if tag['Key'] == 'Name':
instance_name = instance['InstanceId'] + ' (' + tag['Value'] + ')'
append(instances, instance['VpcId'], instance_name)
db_instances = rdsclient.describe_db_instances()
for db_instance in db_instances['DBInstances']:
if 'DBSubnetGroup' in db_instance:
db_vpc = db_instance['DBSubnetGroup']['VpcId']
append(dbs, db_vpc, db_instance['DBInstanceIdentifier'])
aws_cache_subnets = cacheclient.describe_cache_subnet_groups()
for cache_subnet in aws_cache_subnets['CacheSubnetGroups']:
cache_subnets[cache_subnet['CacheSubnetGroupName']] = cache_subnet['VpcId']
cache_clusters = cacheclient.describe_cache_clusters()
for cache_cluster in cache_clusters['CacheClusters']:
cache_name = cache_cluster['CacheSubnetGroupName']
cache_vpc = cache_subnets[cache_name]
append(caches, cache_vpc, cache_name)
vpcs = ec2client.describe_vpcs()
for vpc in vpcs['Vpcs']:
if vpc['IsDefault'] == False:
vpc_id = vpc['VpcId']
for tag in vpc['Tags']:
if tag['Key'] == "Name":
vpc_name = tag['Value']
print(Fore.GREEN + Style.BRIGHT + vpc_id + ' | ' + vpc_name + ' | ' + vpc['CidrBlock'] + ' (' + count(instances, vpc_id) + ' ec2 instances, ' + count(dbs, vpc_id) + ' rds instances, ' + count(caches, vpc_id) + ' elastica\
che instances)' + Style.RESET_ALL)
if vpc_id in instances:
print(Fore.YELLOW + ' ec2 instances: ' + Style.RESET_ALL + ','.join(instances[vpc_id]))
if vpc_id in dbs:
print(Fore.CYAN + ' rds instances: ' + Style.RESET_ALL + ','.join(dbs[vpc_id]))
if vpc_id in caches:
print(Fore.BLUE + ' elasticache instances: ' + Style.RESET_ALL + ','.join(caches[vpc_id]))
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This project is in the public domain within the United States, and copyright and related rights in the work worldwide are waived through the CC0 1.0 Universal public domain dedication.

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