cost-optimization

Cloud cost management, rightsizing, and FinOps practices.

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Install this agent skill to your Project

npx add-skill https://github.com/timequity/vibe-coder/tree/main/skills/infra/cost-optimization

SKILL.md

Cost Optimization

FinOps Principles

Visibility - Know what you spend
Optimization - Reduce waste
Governance - Control growth

Quick Wins

Action	Savings
Reserved instances	30-70%
Spot instances	60-90%
Rightsizing	20-40%
Unused resources	100%
Storage tiering	50-80%

Rightsizing

bash

# AWS: Find underutilized instances
aws cloudwatch get-metric-statistics \
  --namespace AWS/EC2 \
  --metric-name CPUUtilization \
  --dimensions Name=InstanceId,Value=i-xxx \
  --start-time 2024-01-01T00:00:00Z \
  --end-time 2024-01-31T00:00:00Z \
  --period 86400 \
  --statistics Average

If CPU < 20% avg: Downsize or use smaller instance.

Reserved vs Spot

Workload	Recommendation
Steady baseline	Reserved (1-3 year)
Variable load	On-demand + Spot
Batch processing	Spot
Stateless services	Spot with fallback

Storage Optimization

hcl

# S3 Lifecycle
resource "aws_s3_bucket_lifecycle_configuration" "main" {
  bucket = aws_s3_bucket.main.id

  rule {
    id     = "archive"
    status = "Enabled"

    transition {
      days          = 30
      storage_class = "STANDARD_IA"
    }

    transition {
      days          = 90
      storage_class = "GLACIER"
    }
  }
}

Monitoring Costs

AWS Cost Explorer
GCP Billing Reports
Azure Cost Management
Third-party: CloudHealth, Spot.io

Tagging Strategy

hcl

tags = {
  Environment = "production"
  Team        = "platform"
  Service     = "api"
  CostCenter  = "engineering"
}