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Containerization-Orchestration/Kubernetes/workloads/05-hpa.md

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+# 📈 Horizontal Pod Autoscaler (HPA)
+
+The Horizontal Pod Autoscaler automatically scales the number of pods in a deployment based on observed CPU utilization (or other select metrics).
+
+---
+
+## ⚙️ Basic Commands
+
+### 🚀 Create an HPA
+Create an HPA for a deployment, scaling based on CPU usage:
+
+```bash
+kubectl -n <namespace> autoscale deployment <deployment-name> --cpu-percent=20 --min=4 --max=10
+````
+
+### 📊 View Existing HPAs
+
+List all HPAs in a specific namespace:
+
+```bash
+kubectl get hpa -n <namespace>
+```
+
+### ❌ Delete an HPA
+
+Remove a Horizontal Pod Autoscaler:
+
+```bash
+kubectl delete hpa -n <namespace> <hpa-name>
+```
+
+### 🛠️ Edit an HPA
+
+Manually edit an existing HPA configuration:
+
+```bash
+kubectl edit hpa -n <namespace> <hpa-name>
+```
+
+---
+
+## 🧾 Example HPA Manifest
+
+You can define an HPA using a YAML file for more control:
+
+```yaml
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: hpa-test
+  namespace: dev
+spec:
+  minReplicas: 1
+  maxReplicas: 10
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 50
+```
+
+> ℹ️ **Note:** The above manifest uses API version `autoscaling/v2` for enhanced metric support.
+
+---
+