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Troubleshooting Docker and Kubernetes Containers

Resolving Ingress Configuration Issues

Explore how to identify and resolve common Kubernetes ingress configuration errors including undefined host-based routing, invalid rules, and missing backend definitions. This lesson provides practical steps to validate and correct your ingress.yaml files, apply fixes, and verify successful ingress service creation, helping you maintain reliable Kubernetes service accessibility.

We'll cover the following...

Resolving ingress resource issues related to undefined host-based routing, invalid rules, and undefined backends involves ensuring the correct configuration and troubleshooting problems. To address these issues, we define host rules for hostname-based routing and validate and correct any rule inaccuracies. We also ensure that backend services are correctly defined within the ingress resource.

Undefined host-based routing

We’ll be using the ingress.yaml file below to explain how to resolve errors regarding undefined host-based routing.

YAML
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: invalid-ingress
spec:
  rules:       
    - host: ourapp.com
      paths:
        - path: /
          pathType: Prefix
          backend:
            service:
              name: web-service
              port:
                number: 80

We create the ingress service with the command below.

kubectl apply -f ingress.yaml

We get the following error upon using the command ...