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Emeline Nerot 2025-04-15 20:11:51 +00:00
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20
Dockerfile Normal file
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# Use the official Node.js 16 image as the base image
FROM node:16
# Set the working directory
WORKDIR /usr/src/app
# Copy the package.json and package-lock.json files
COPY package*.json ./
# Install dependencies
RUN npm install
# Copy the rest of the application code
COPY . .
# Expose the port the app runs on
EXPOSE 8080
# Command to run the application
CMD ["node", "server.js"]

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README.md Normal file
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# Web Application Deployment to Kubernetes
## Description
This project deploys a simple web application to Kubernetes using a Deployment, StatefulSet, Service, PersistentVolume, and PersistentVolumeClaim. The application is a basic Node.js server that serves a web page.
## Containers Used
- **web-app-container**: A container running a Node.js application.
## Kubernetes Objects
- **Namespace**: `my-namespace`
- **Deployment**: `web-app-deployment`
- **StatefulSet**: `web-app-statefulset`
- **Service**: `web-app-service`
- **PersistentVolume**: `pv-volume`
- **PersistentVolumeClaim**: `pvc-claim`
## Virtual Networks and Named Volumes
- The application uses a PersistentVolume and PersistentVolumeClaim to store data.
- The Service exposes the application on port 80.
## Container Configuration
- The Dockerfile builds a Node.js application and exposes port 8080.
- The Deployment and StatefulSet use the image `my-web-app:latest`.
## Instructions
### Prepare the Application
1. Run the `prepare-app.sh` script to build the Docker image and create the namespace and persistent volumes.
```bash
./prepare-app.sh

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deployment.yaml Normal file
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apiVersion: apps/v1
kind: Deployment
metadata:
name: web-app-deployment
namespace: my-namespace
spec:
replicas: 3
selector:
matchLabels:
app: web-app
template:
metadata:
labels:
app: web-app
spec:
containers:
- name: web-app-container
image: elineen/todo-app:latest
ports:
- containerPort: 8080

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namespace.yaml Normal file
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apiVersion: v1
kind: Namespace
metadata:
name: my-namespace

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}

12
package.json Normal file
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@ -0,0 +1,12 @@
{
"name": "todo-app",
"version": "1.0.0",
"description": "A simple todo-list application",
"main": "server.js",
"scripts": {
"start": "node server.js"
},
"dependencies": {
"express": "^4.17.1"
}
}

10
prepare-app.sh Normal file
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@ -0,0 +1,10 @@
#!/bin/bash
# Build the Docker image
docker build -t my-web-app:latest .
# Create the namespace
kubectl create namespace my-namespace
# Apply the PersistentVolume and PersistentVolumeClaim
kubectl apply -f statefulset.yaml

33
server.js Normal file
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@ -0,0 +1,33 @@
const express = require('express');
const app = express();
const port = 8080;
app.use(express.json());
app.use(express.static('public'));
let todos = [];
app.get('/api/todos', (req, res) => {
res.json(todos);
});
app.post('/api/todos', (req, res) => {
const newTodo = {
id: todos.length + 1,
text: req.body.text,
completed: false
};
todos.push(newTodo);
res.status(201).json(newTodo);
});
app.delete('/api/todos/:id', (req, res) => {
const id = parseInt(req.params.id, 10);
todos = todos.filter(todo => todo.id !== id);
res.status(204).send();
});
app.listen(port, () => {
console.log(`Server is running on http://localhost:${port}`);
});

13
service.yaml Normal file
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@ -0,0 +1,13 @@
apiVersion: v1
kind: Service
metadata:
name: web-app-service
namespace: my-namespace
spec:
selector:
app: web-app
ports:
- protocol: TCP
port: 80
targetPort: 8080
type: LoadBalancer

14
start-app.sh Normal file
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@ -0,0 +1,14 @@
#!/bin/bash
# Create the Namespace
minikube kubectl -- create namespace my-namespace
# Apply the Deployment
minikube kubectl -- apply -f deployment.yaml
# Apply the Service
minikube kubectl -- apply -f service.yaml
# Apply the StatefulSet
minikube kubectl -- apply -f statefulset.yaml

33
statefulset.yaml Normal file
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@ -0,0 +1,33 @@
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: web-app-statefulset
namespace: my-namespace
spec:
serviceName: "web-app-service"
replicas: 1
selector:
matchLabels:
app: web-app
template:
metadata:
labels:
app: web-app
spec:
containers:
- name: web-app-container
image: elineen/todo-app:latest # Assurez-vous que ce nom est correct
ports:
- containerPort: 8080
volumeMounts:
- name: pvc-storage
mountPath: /data
volumeClaimTemplates:
- metadata:
name: pvc-storage
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi

13
stop-app.sh Normal file
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@ -0,0 +1,13 @@
#!/bin/bash
# Delete the Deployment
kubectl delete -f deployment.yaml
# Delete the Service
kubectl delete -f service.yaml
# Delete the StatefulSet
kubectl delete -f statefulset.yaml
# Delete the namespace
kubectl delete namespace my-namespace