🚀 Kubernetes + Minikube

Deploying MongoDB & Mongo-Express (Step-by-Step Guide)

This guide explains how to deploy MongoDB and Mongo-Express on Minikube using Kubernetes manifests.

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📌 1. Start Fresh (Optional – Reset Minikube)

minikube delete --all

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📌 2. Start Minikube

minikube start --driver=docker

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📌 3. Apply MongoDB Deployment & Service

kubectl apply -f mongo.yml

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📌 4. Apply Mongo-Express Deployment & Service

kubectl apply -f mongo-express.yml

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📌 5. Access Mongo-Express via Minikube Service

minikube service mongo-express-service

This will print a URL like:

http://127.0.0.1:30001

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📌 6. Optional: Port-Forward Mongo-Express Service

kubectl port-forward service/mongo-express-service 30001:8081

Visit:

http://localhost:30001

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📌 7. Check Pods

kubectl get pods

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📌 8. Check Services

kubectl get service
# or
kubectl get svc

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📌 9. Check Deployments

kubectl get deployment

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📌 10. Debugging / Troubleshooting

Describe a Pod

kubectl describe pod <pod-name>

Describe a Service

kubectl describe service mongo-express-service

Describe a Deployment

kubectl describe deployment mongo-express-deployment

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⚡ Notes & Tips

• Use:

kubectl get pods -o wide

to see node assignments and Pod IPs.

• Minikube uses the Docker driver by default; you can change it if needed.

• Production Warning:
  Avoid storing passwords directly in YAML files.
  Use Kubernetes Secrets:

kubectl create secret generic mongo-secret   --from-literal=username=admin   --from-literal=password=pass123