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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]))
@jezhumble

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commented Dec 16, 2016

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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