💰 aws-cost-optimization

Scripts, strategies, and guides for reducing AWS spend — by @ars-devsecops

Real result: ~20% AWS monthly cost reduction across client accounts at Flentas Technologies

---

📦 Contents

Path	Description
scripts/ec2_rightsizing.py	Analyzes EC2 CPU metrics — flags over-provisioned instances
savings-plans/savings-plans-strategy.md	Framework for Savings Plans & Reserved Instance decisions
reports/	Sample cost reports (anonymized)

🚀 Quick Start

# Install dependencies
pip install boto3

# Configure AWS credentials
aws configure

# Run right-sizing analysis (14-day lookback)
python3 scripts/ec2_rightsizing.py --region ap-south-1 --days 14

# Save results to CSV
python3 scripts/ec2_rightsizing.py --region ap-south-1 --days 30 --output report.csv

Sample Output

==========================================================================================
  EC2 RIGHT-SIZING REPORT  |  15 instances analyzed  |  Potential monthly saving: $340
==========================================================================================
Instance ID            Name                 Type           Avg CPU  Max CPU  Suggested       Saving/mo
------------------------------------------------------------------------------------------
i-0abc123def456789a    prod-api-server-01   m5.2xlarge      12.3%   38.1%   m5.xlarge          $140
i-0abc123def456789b    prod-worker-02       m5.xlarge        8.7%   22.4%   m5.large            $70
i-0abc123def456789c    staging-app-01       t3.large         6.1%   15.2%   t3.medium           $34
==========================================================================================
  📉 Instances to downsize:   8
  💰 Total potential saving:  $340/month  ($4,080/year)
==========================================================================================

💡 Cost Reduction Strategies Used

Strategy	Typical Saving
Right-size over-provisioned EC2	20–40% on affected instances
Convert On-Demand → Savings Plans	30–60% on covered usage
Stop dev/test outside business hours	~65% on those instances
Delete unattached EBS volumes	Varies
S3 Intelligent-Tiering	20–40% on storage costs
Reduce CloudWatch log retention	Varies

🤝 Author

Amol Shinde · Cloud & DevOps Engineer · Pune, India