Simple Python Flask Multi-Page Dockerized Image Application

Build the image using the following command

$ docker build -t image-app:latest .

Run the Docker container using the command shown below.

$ docker run -d -p 5000:5000 image-app

The application will be accessible at http:127.0.0.1:5000 or if you are using boot2docker then first find ip address using $ boot2docker ip and the use the ip http://<host_ip>:5000

Application should be running on Port 5000

For Ingress Controller:

1. First apply ingress.yaml file to create ingress resource.

2. Next step would be to deploy/install ingress controller. I used following commands to install ingress controller on GCE-GKE cluster: a. First, your user needs to have cluster-admin permissions on the cluster. This can be done with the following command: kubectl create clusterrolebinding cluster-admin-binding
   --clusterrole cluster-admin
   --user $(gcloud config get-value account) b. Then, the ingress controller can be installed like this: kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.12.0/deploy/static/provider/cloud/deploy.yaml

3. Note: when I tried to access the log of the pod created in 2.b above(while creating ingress resource) using following command: kubectl get pods -A | grep nginx kubectl logs podName -n ingress-nginx| grep example above cmd logs gave me following error: Kubernetes IngressClass | error="ingress does not contain a valid IngressClass"

   In order to resolve above error, I used following steps: Step 1 — Create IngressClass resource First we have to create IngressClass ingress resource. (Check if there is any kubectl get ingressclass -A -o yaml ) apiVersion: networking.k8s.io/v1 kind: IngressClass metadata: name: nginx spec: # use your controller name. controller: k8s.io/ingress-nginx Step 2 — Create/Update Ingress Update ingress resource spec.ingressClassName with ingress class name nginx. This should resolve the problem. apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: minimal-ingress annotations: nginx.ingress.kubernetes.io/rewrite-target: / spec: ingressClassName: nginx rules: - http: paths: - path: /testpath pathType: Prefix backend: service: name: test port: number: 80 4. Add address from 'kubectl get ingress -n your-namespace' at the following path file to match it to the foo.bar.com mentioned in ingress.yaml file. eg. I added: 34.69.185.52 foo.bar.com at the end of the following file path: sudo nano /etc/hosts Note: This step is only necessary if you do not have real https path like in production. Since I am only doing this for practice using http so I had to fake this mapping. 5. after step for you can use curl or ping at foo.bar.com like: ping foo.bar.com curl -L foo.bar.com/bar -v

   Commands to delete all the ingress-controller resources: kubectl get all -n ingress-nginx kubectl delete all --all -n ingress-nginx kubectl get all -n ingress-nginx kubectl get ingressClass kubectl get ingressClass -A kubectl delete ingressClass nginx kubectl get ingressClass -A kubectl get ValidatingWebhookConfiguration kubectl delete ValidatingWebhookConfiguration ingress-nginx-admission kubectl get ValidatingWebhookConfiguration kubectl get all kubectl get all -n yourNamespace kubectl get ingress -A