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Kubernetes with web application and mongo database

Get started

The following application illustrate simple kubernetes cluster. It contains few modules, which is spring boot web application, mongo database server, mongo express client, k8s secret with database configuration, config map and ingress component.

The configuration and statistics can be done with using kubernetes dashboard. Project describe how to access dashboard UI.

Installation

minikube start

Applying all k8s config files:

kubectl apply -f db-secret.yaml
kubectl apply -f db-config.yaml
kubectl apply -f mongo.yaml
kubectl apply -f mongo-express.yaml
kubectl apply -f webapp.yaml
kubectl apply -f ingress.yaml

Accessing web application

minikube ip

http://<cluster_ip>:30100/

Accessing mongo express client

minikube ip
http://<cluster_ip>:30200/

Checking pod logs

kubectl get pod
kubectl logs <pod_name>
kubectl describe pod <pod_name>

Kubernetes dashboard

Create account for kubernetes dashboard

cd dashboard
kubectl apply -f admin-user.yaml
kubectl apply -f cluster-role.yaml

Create Bearer Token

kubectl -n kubernetes-dashboard create token admin-user

Accessing kubernetes dashboard

http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/

Documentation of the libraries used