• Namespace for the Ingress Controller is in nginx-ingress
  • What is the name of the Ingress Controller deployment?
    • Find this out with kubectl get deploy -A / kubectl get deploy --all-namespaces
    • The answer here was ingress-nginx-controller
  • How to find how many applications are deployed in a particular namespace: 
    kubectl get deploy -A
  • How to find the host configured on the Ingress Resource? Run kubectl describe ingress --namespace app-space and then check under the Rules section for Host.
    • A star under Host means this affects all hosts.
  • How to check the backend and see which permission 
    kubectl describe ingress --namespace app-space
  • Then check under the rules.
  • If the requirement listed there does not match any of the configured paths in the Ingress, to which service is the request forwarded too?
    • default-backend-service is the answer here.
  • How to change the URL at which an application is made available:
  • Use this manifest file: ``` apiVersion: networking.k8s.io/v1 kind: Ingress metadata: annotations: nginx.ingress.kubernetes.io/rewrite-target: / nginx.ingress.kubernetes.io/ssl-redirect: “false” name: ingress-wear-watch namespace: app-space spec: rules:
    • http: paths:
      • backend: service: name: wear-service port: number: 8080 path: /wear pathType: Prefix
      • backend: service: name: video-service port: number: 8080 path: /stream pathType: Prefix ```
  • Then apply this with kubectl create -f <name>.
    • How to add a new path to the Ingress, that is customer-facing.
  • Here is the manifest file to deploy for that: ``` apiVersion: networking.k8s.io/v1 kind: Ingress metadata: annotations: nginx.ingress.kubernetes.io/rewrite-target: / nginx.ingress.kubernetes.io/ssl-redirect: “false” name: ingress-wear-watch namespace: app-space spec: rules:
    • http: paths:
      • backend: service: name: wear-service port: number: 8080 path: /wear pathType: Prefix
      • backend: service: name: video-service port: number: 8080 path: /stream pathType: Prefix
      • backend: service: name: food-service port: number: 8080 path: /eat pathType: Prefix ```
  • Example manifest file to make the application available at /pay: ``` — apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: test-ingress namespace: critical-space annotations: nginx.ingress.kubernetes.io/rewrite-target: / nginx.ingress.kubernetes.io/ssl-redirect: “false” spec: rules:
    • http: paths:
      • path: /pay pathType: Prefix backend: service: name: pay-service port: number: 8282 ```

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