K8S Custom Default Backend

Build instructions

React.JS

1. Run docker build

docker build -t some_tag --build-arg REDIRECT_URL=https://some-url.com .

2. Push image to registry

docker push some_registry/k8s-custom-default-backend:some_tag

Build Instructions (Native HTML + CSS + JS)

1. Delete template from content folder
2. Place index.html and related css/js files in content folder
3. Remove lines 1 through 19 inclusive in Dockerfile
4. Replace the new line 12 with COPY ./content /var/www/html/ in Dockerfile
5. Run docker build

docker build -t some_tag .

6. Push image to registry

docker push some_registry/k8s-custom-default-backend:some_tag

Usage instructions

1. Create manifest (custom_default_backend.yaml)

---
apiVersion: v1
kind: Service
metadata:
  name: custom-default-backend
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: custom-default-backend
    app.kubernetes.io/part-of: ingress-nginx
spec:
  selector:
    app.kubernetes.io/name: custom-default-backend
    app.kubernetes.io/part-of: ingress-nginx
  ports:
  - port: 80
    targetPort: 80
    name: http
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: custom-default-backend
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: custom-default-backend
    app.kubernetes.io/part-of: ingress-nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: custom-default-backend
      app.kubernetes.io/part-of: ingress-nginx
  template:
    metadata:
      labels:
        app.kubernetes.io/name: custom-default-backend
        app.kubernetes.io/part-of: ingress-nginx
    spec:
      containers:
      - name: custom-default-backend
        image: registry/k8s-custom-default-backend:some_tag
        imagePullPolicy: Always
        ports:
        - containerPort: 80

2. Kubectl create the manifest

kubectl create -f custom_default_backend.yaml

3. Delete previous Nginx Ingress Controller Helm installation

helm delete nginx-ingress -n ingress-nginx

4. Reinstall

helm install nginx-ingress --namespace kube-system ingress-nginx/ingress-nginx --set defaultBackend.enabled=false,controller.defaultBackendService=ingress-nginx/custom-default-backend

Supporting

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