What is the difference between Ingress and Gateway API?

Question

Accepted Answer

**Ingress** — basic HTTP routing. **Gateway API** — advanced, role-oriented networking.

**Gateway API:**
- Role-oriented: Infrastructure, Cluster ops, App teams.
- Richer features: header matching, traffic splitting.
- Portable across implementations.

```yaml
apiVersion: gateway.networking.k8s.io/v1
kind: Gateway
metadata:
  name: main-gateway
spec:
  gatewayClassName: nginx
  listeners:
  - name: https
    protocol: HTTPS
    port: 443
    tls:
      mode: Terminate
      certificateRefs:
      - name: tls-cert
---
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: app-route
spec:
  parentRefs:
  - name: main-gateway
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /api
    backendRefs:
    - name: api-service
      port: 80
```

**Advantages over Ingress:**
- Role-based model.
- Traffic splitting.
- Header-based routing.

DevOps: What is the difference between Ingress and Gateway API?