What is the kubectl scale?

Question

Accepted Answer

**kubectl scale** — **scaling** deployments.

```bash
# Scaling
kubectl scale deployment myapp --replicas=5
kubectl scale deployment myapp --replicas=3 -n production
kubectl scale deployment myapp --replicas=10 --current-replicas=3

# Check
kubectl get deployment myapp
kubectl get rs  # ReplicaSets
kubectl rollout status deployment/myapp

# Auto-scaling (HPA)
kubectl get hpa
kubectl describe hpa myapp-hpa
kubectl autoscale deployment myapp --min=2 --max=10 --cpu-percent=70

# Vertical scaling (VPA)
kubectl get vpa
kubectl describe vpa myapp-vpa

# Cluster Autoscaler
kubectl get nodes  # New nodes appear automatically
kubectl get nodes --show-labels
```

**Tips:**
- Use HPA for auto-scaling.
- Configure resource requests/limits for proper HPA operation.
- Monitor Cluster Autoscaler to understand needs.

DevOps: What is the kubectl scale?