What You'll Learn

• Containerize a simple web app
• Push it to a container registry
• Deploy it to OVHcloud Managed Kubernetes
• Expose it to the internet

Prerequisites

• An OVHcloud account with access to the Public Cloud
• kubectl and helm installed
• Docker installed
• A container registry account (Docker Hub, GitHub Container Registry, or GitLab)
• Basic knowledge of Docker and Kubernetes

Create a Simple Web App (e.g., Python Flask)

# app.py
from flask import Flask
app = Flask(__name__)

@app.route("/")
def home():
    return "Hello from OVHcloud Kubernetes!"

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=5000)

Dockerize the App

# Dockerfile
FROM python:3.11-slim
WORKDIR /app
COPY app.py .
RUN pip install flask
CMD ["python", "app.py"]

Then build and push:

docker build -t yourusername/ovhcloud-k8s-demo:latest .
docker push yourusername/ovhcloud-k8s-demo:latest

Create a Kubernetes Cluster on OVHcloud

• Go to your OVHcloud control panel
• Navigate to “Public Cloud” → “Managed Kubernetes”
• Create a new cluster with at least one node
• Download the kubeconfig file and set it up:

export KUBECONFIG=~/Downloads/your-kubeconfig.yaml
kubectl get nodes

Create Kubernetes Deployment and Service

# deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
    name: flask-app
spec:
    replicas: 2
    selector:
    matchLabels:
        app: flask-app
    template:
    metadata:
        labels:
        app: flask-app
    spec:
        containers:
        - name: flask-app
        image: yourusername/ovhcloud-k8s-demo:latest
        ports:
        - containerPort: 5000
---
# service.yaml
apiVersion: v1
kind: Service
metadata:
    name: flask-service
spec:
    selector:
    app: flask-app
    ports:
    - protocol: TCP
        port: 80
        targetPort: 5000
    type: LoadBalancer

Apply it:

kubectl apply -f deployment.yaml
kubectl apply -f service.yaml

Access Your App

Run:

kubectl get svc

Wait for the external IP to appear (LoadBalancer provisioning).

Visit http://your-external-ip and you should see: "Hello from OVHcloud Kubernetes!"