cloud-infrastructure

# Cloud Infrastructure Skill

## Quick Reference

| Platform | Market | Best For | Learning |
|----------|--------|----------|----------|
| **AWS** | 32% | Everything | 3-6 mo |
| **Azure** | 24% | Microsoft stack | 3-6 mo |
| **GCP** | 11% | Data, ML | 3-6 mo |
| **Cloudflare** | Edge | CDN, Workers | 2-4 wk |

---

## Learning Paths

### AWS
```
[1] IAM + VPC (1-2 wk)
 │  └─ Roles, policies, networking
 │
 ▼
[2] Compute: EC2, Lambda (2-3 wk)
 │
 ▼
[3] Storage: S3, EBS (1-2 wk)
 │
 ▼
[4] Database: RDS, DynamoDB (2-3 wk)
 │
 ▼
[5] Containers: ECS, EKS (3-4 wk)
 │
 ▼
[6] Monitoring: CloudWatch (1-2 wk)
```

### Docker & Containers
```
[1] Docker Basics (1 wk)
 │  └─ Images, containers, Dockerfile
 │
 ▼
[2] Multi-stage Builds (1 wk)
 │  └─ Optimization, layer caching
 │
 ▼
[3] Docker Compose (1 wk)
 │  └─ Multi-container apps
 │
 ▼
[4] Registry & Security (1 wk)
    └─ Push/pull, scanning, non-root
```

### Kubernetes
```
[1] Pods & Deployments (2 wk)
 │
 ▼
[2] Services & Networking (1-2 wk)
 │
 ▼
[3] ConfigMaps & Secrets (1 wk)
 │
 ▼
[4] Helm Charts (2 wk)
 │
 ▼
[5] Production Patterns (ongoing)
    └─ HPA, PDB, resource limits
```

### Terraform (IaC)
```
[1] Resources & State (1 wk)
 │
 ▼
[2] Variables & Outputs (1 wk)
 │
 ▼
[3] Modules (1-2 wk)
 │
 ▼
[4] Remote State (1 wk)
 │
 ▼
[5] Workspaces & Environments (1 wk)
```

---

## Kubernetes Quick Reference

| Resource | Purpose | Example |
|----------|---------|---------|
| **Pod** | Smallest unit | Single container |
| **Deployment** | Manage replicas | Web app |
| **Service** | Network access | ClusterIP, LoadBalancer |
| **Ingress** | HTTP routing | Path-based routing |
| **ConfigMap** | Configuration | Environment variables |
| **Secret** | Sensitive data | Credentials |
| **StatefulSet** | Stateful apps | Databases |

---

## Terraform Structure

```
project/
├── main.tf           # Resources
├── variables.tf      # Inputs
├── outputs.tf        # Outputs
├── providers.tf      # Provider config
├── versions.tf