What key parameters and settings must be configured in the Ingress object when working with Kubernetes?

In the Kubernetes Ingress object, the following key parameters must be configured:

• metadata.name — the name of the Ingress resource.
• spec.rules — routing rules specifying hosts and paths for request routing.
• spec.rules.host — the domain name that the Ingress will respond to.
• spec.rules.http.paths — a list of paths and their corresponding backend services.
• spec.rules.http.paths.backend.service.name — the name of the service to which traffic will be directed.
• spec.rules.http.paths.backend.service.port.number — the service port.

Additionally, the following are often configured:

• spec.tls — to enable TLS (HTTPS) with specified secret certificates.
• annotations — to configure specific parameters of the Ingress controller (e.g., timeouts, path rewriting, rate limiting).

Example of a minimal Ingress configuration:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - host: example.com
    http:
      paths:
      - path: /app
        pathType: Prefix
        backend:
          service:
            name: example-service
            port:
              number: 80
  tls:
  - hosts:
    - example.com
    secretName: example-tls-secret

Without proper configuration of these parameters, the Ingress will not be able to route requests correctly to the required services within the cluster.