What is Load Balancing?

Question

Accepted Answer

**Load Balancing** — distributing load across servers.

```nginx
# Nginx load balancer
upstream backend {
    least_conn;
    server backend1:3000;
    server backend2:3000;
    server backend3:3000 backup;
}

server {
    listen 80;
    location / {
        proxy_pass http://backend;
    }
}
```

```yaml
# Kubernetes Service
apiVersion: v1
kind: Service
metadata:
  name: myapp
spec:
  selector:
    app: myapp
  ports:
    - protocol: TCP
      port: 80
      targetPort: 3000
  type: LoadBalancer
```

**Algorithms:**
- Round Robin.
- Least Connections.
- IP Hash.
- Weighted.

DevOps: What is Load Balancing?