optimizing-costs

# Cost Optimization

## Purpose

Cloud cost optimization transforms uncontrolled spending into strategic resource allocation through the FinOps lifecycle: Inform, Optimize, and Operate. This skill provides decision frameworks for commitment-based discounts (Reserved Instances, Savings Plans), right-sizing strategies, Kubernetes cost management, and automated cost governance across multi-cloud environments.

## When to Use This Skill

Invoke cost-optimization when:
- Reducing cloud spend by 15-40% through systematic optimization
- Implementing cost visibility dashboards and allocation tracking
- Establishing budget alerts and anomaly detection
- Optimizing Kubernetes resource requests and cluster efficiency
- Managing Reserved Instances, Savings Plans, or Committed Use Discounts
- Automating idle resource cleanup and right-sizing recommendations
- Setting up showback/chargeback models for internal teams
- Preventing cost overruns through CI/CD cost estimation (Infracost)
- Responding to finance team requests for cloud cost reduction

## FinOps Principles

### The FinOps Lifecycle

```
┌─────────────────────────────────────────────────────┐
│  INFORM → OPTIMIZE → OPERATE (continuous loop)      │
│    ↓         ↓           ↓                          │
│ Visibility  Action   Automation                     │
└─────────────────────────────────────────────────────┘
```

**Inform Phase:** Establish cost visibility
- Enable cost allocation tags (Owner, Project, Environment)
- Deploy real-time cost dashboards for engineering teams
- Integrate cloud billing data (AWS CUR, Azure Consumption API, GCP BigQuery)
- Set up Kubernetes cost monitoring (Kubecost, OpenCost)

**Optimize Phase:** Take action on cost drivers
- Purchase commitment-based discounts (40-72% savings)
- Right-size over-provisioned resources (target 60-80% utilization)
- Implement spot/preemptible instances for fault-tolerant workloads
- Clean up idle resources (unattached volumes, old snapshots)

**Operate Phase