AWS Cost Cleanup Automate the identification and removal of unused AWS resources to eliminate waste. When to Use This Skill Use this skill when you need to automatically clean up unused AWS resources to reduce costs and eliminate waste. Automated Cleanup Targets Storage Unattached EBS volumes Old EBS snapshots (>90 days) Incomplete multipart S3 uploads Old S3 versions in versioned buckets Compute Stopped EC2 instances (>30 days) Unused AMIs and associated snapshots Unused Elastic IPs Networking Unused Elastic Load Balancers Unused NAT Gateways Orphaned ENIs Cleanup Scripts Safe Cleanup (Dry-Run First)

!/bin/bash

cleanup-unused-ebs.sh

echo "Finding unattached EBS volumes..." VOLUMES = $( aws ec2 describe-volumes \ --filters Name = status,Values = available \ --query 'Volumes[*].VolumeId' \ --output text ) for vol in $VOLUMES ; do echo "Would delete: $vol "

Uncomment to actually delete:

aws ec2 delete-volume --volume-id $vol

done

!/bin/bash

cleanup-old-snapshots.sh

CUTOFF_DATE

$( date -d '90 days ago' --iso-8601 ) aws ec2 describe-snapshots --owner-ids self \ --query "Snapshots[?StartTime<=' $CUTOFF_DATE '].[SnapshotId,StartTime,VolumeSize]" \ --output text | while read snap_id start_time size ; do echo "Snapshot: $snap_id (Created: $start_time , Size: ${size} GB)"

Uncomment to delete:

aws ec2 delete-snapshot --snapshot-id $snap_id

done

!/bin/bash

release-unused-eips.sh

aws ec2 describe-addresses \ --query 'Addresses[?AssociationId==null].[AllocationId,PublicIp]' \ --output text | while read alloc_id public_ip ; do echo "Would release: $public_ip ( $alloc_id )"

Uncomment to release:

aws ec2 release-address --allocation-id $alloc_id

done S3 Lifecycle Automation

Apply lifecycle policy to transition old objects to cheaper storage

cat

lifecycle-policy.json << EOF { "Rules": [ { "Id": "Archive old objects", "Status": "Enabled", "Transitions": [ { "Days": 90, "StorageClass": "STANDARD_IA" }, { "Days": 180, "StorageClass": "GLACIER" } ], "NoncurrentVersionExpiration": { "NoncurrentDays": 30 }, "AbortIncompleteMultipartUpload": { "DaysAfterInitiation": 7 } } ] } EOF aws s3api put-bucket-lifecycle-configuration \ --bucket my-bucket \ --lifecycle-configuration file://lifecycle-policy.json Cost Impact Calculator

!/usr/bin/env python3

calculate-savings.py

import boto3 from datetime import datetime , timedelta ec2 = boto3 . client ( 'ec2' )

Calculate EBS volume savings

volumes

ec2 . describe_volumes ( Filters = [ { 'Name' : 'status' , 'Values' : [ 'available' ] } ] ) total_size = sum ( v [ 'Size' ] for v in volumes [ 'Volumes' ] ) monthly_cost = total_size * 0.10

$0.10/GB-month for gp3

print ( f"Unattached EBS Volumes: { len ( volumes [ 'Volumes' ] ) } " ) print ( f"Total Size: { total_size } GB" ) print ( f"Monthly Savings: $ { monthly_cost : .2f } " )

Calculate Elastic IP savings

addresses

ec2 . describe_addresses ( ) unused = [ a for a in addresses [ 'Addresses' ] if 'AssociationId' not in a ] eip_cost = len ( unused ) * 3.65

$0.005/hour * 730 hours

print ( f"\nUnused Elastic IPs: { len ( unused ) } " ) print ( f"Monthly Savings: $ { eip_cost : .2f } " ) print ( f"\nTotal Monthly Savings: $ { monthly_cost + eip_cost : .2f } " ) print ( f"Annual Savings: $ { ( monthly_cost + eip_cost ) * 12 : .2f } " ) Automated Cleanup Lambda import boto3 from datetime import datetime , timedelta def lambda_handler ( event , context ) : ec2 = boto3 . client ( 'ec2' )

Delete unattached volumes older than 7 days

volumes

ec2 . describe_volumes ( Filters = [ { 'Name' : 'status' , 'Values' : [ 'available' ] } ] ) cutoff = datetime . now ( ) - timedelta ( days = 7 ) deleted = 0 for vol in volumes [ 'Volumes' ] : create_time = vol [ 'CreateTime' ] . replace ( tzinfo = None ) if create_time < cutoff : try : ec2 . delete_volume ( VolumeId = vol [ 'VolumeId' ] ) deleted += 1 print ( f"Deleted volume: { vol [ 'VolumeId' ] } " ) except Exception as e : print ( f"Error deleting { vol [ 'VolumeId' ] } : { e } " ) return { 'statusCode' : 200 , 'body' : f'Deleted { deleted } volumes' } Cleanup Workflow Discovery Phase (Read-only) Run all describe commands Generate cost impact report Review with team Validation Phase Verify resources are truly unused Check for dependencies Notify resource owners Execution Phase (Dry-run first) Run cleanup scripts with dry-run Review proposed changes Execute actual cleanup Verification Phase Confirm deletions Monitor for issues Document savings Safety Checklist Run in dry-run mode first Verify resources have no dependencies Check resource tags for ownership Notify stakeholders before deletion Create snapshots of critical data Test in non-production first Have rollback plan ready Document all deletions Example Prompts Discovery "Find all unused resources and calculate potential savings" "Generate a cleanup report for my AWS account" "What resources can I safely delete?" Execution "Create a script to cleanup unattached EBS volumes" "Delete all snapshots older than 90 days" "Release unused Elastic IPs" Automation "Set up automated cleanup for old snapshots" "Create a Lambda function for weekly cleanup" "Schedule monthly resource cleanup" Integration with AWS Organizations

Run cleanup across multiple accounts

for account in $( aws organizations list-accounts \ --query 'Accounts[*].Id' --output text ) ; do echo "Checking account: $account " aws ec2 describe-volumes \ --filters Name = status,Values = available \ --profile account- $account done Monitoring and Alerts

Create CloudWatch alarm for cost anomalies

aws cloudwatch put-metric-alarm \ --alarm-name high-cost-alert \ --alarm-description "Alert when daily cost exceeds threshold" \ --metric-name EstimatedCharges \ --namespace AWS/Billing \ --statistic Maximum \ --period 86400 \ --evaluation-periods 1 \ --threshold 100 \ --comparison-operator GreaterThanThreshold Best Practices Schedule cleanup during maintenance windows Always create final snapshots before deletion Use resource tags to identify cleanup candidates Implement approval workflow for production Log all cleanup actions for audit Set up cost anomaly detection Review cleanup results weekly Risk Mitigation Medium Risk Actions: Deleting unattached volumes (ensure no planned reattachment) Removing old snapshots (verify no compliance requirements) Releasing Elastic IPs (check DNS records) Always: Maintain 30-day backup retention Use AWS Backup for critical resources Test restore procedures Document cleanup decisions Kiro CLI Integration

Analyze and cleanup in one command

kiro-cli chat "Use aws-cost-cleanup to find and remove unused resources"

Generate cleanup script

kiro-cli chat "Create a safe cleanup script for my AWS account"

Schedule automated cleanup

kiro-cli chat "Set up weekly automated cleanup using aws-cost-cleanup" Additional Resources AWS Resource Cleanup Best Practices AWS Systems Manager Automation AWS Config Rules for Compliance