# Todo App Kubernetes Deployment

This repository contains the Kubernetes configuration files to deploy my Todo App.

## Description

The Todo App is a web application for creating, reading, updating, and deleting the task to do. It is built using Node.js and is containerized using Docker.

## Containers Used

- **elineen/todo-app:latest**: The main application container that runs the Todo App.

## Kubernetes Objects

- **Namespace**: `namespace.yaml` - The namespace in which all other objects are created.
- **Deployment**: `deployment.yaml` - Defines the deployment configuration for the Todo App.
- **StatefulSet**: `statefulset.yaml` - Defines the stateful set configuration for the Todo App, including PersistentVolume and PersistentVolumeClaim objects.
- **Service**: `service.yaml` - Exposes the Todo App to the network.

## Virtual Networks and Named Volumes

- **PersistentVolume**: Defines a persistent volume for storing application data.
- **PersistentVolumeClaim**: Claims the persistent volume for use by the StatefulSet.

## Container Configuration

The container configuration includes the following:
- **Image**: `elineen/todo-app:latest`
- **Ports**: The application listens on port 8080.
- **Volume Mounts**: The container mounts the persistent volume at `/data`.

## Instructions

### Prerequisites

- Kubernetes cluster (e.g., Minikube, Docker Desktop, or a cloud provider like GKE, EKS, AKS)
- `kubectl` command-line tool installed and configured to interact with your Kubernetes cluster
- Docker installed and configured to pull images from Docker Hub

### Prepare the Application

Run the following script to prepare the application, build the Docker image, and create the persistent volumes:

```bash
./prepare-app.sh
```
### Start the Application

Run the following script to create all Kubernetes objects and start the application:

```
./start-app.sh
```
### Stop the Application

Run the following script to delete all created Kubernetes objects and stop the application:

```bash
./stop-app.sh
```
### View the Application

If you are using a LoadBalancer service, you can access the application using the external IP address provided by the service. Run the following command to get the service details:

```
kubectl get services -n my-namespace
```

##Documentation

- **Description**: The Todo App is a simple web application for managing todo items.
- **Containers**: The application uses the elineen/todo-app:latest container.
- **Kubernetes Objects**: The deployment includes a Namespace, Deployment, StatefulSet, Service, PersistentVolume, and PersistentVolumeClaim.
- **Virtual Networks and Named Volumes**: The application uses a persistent volume for data storage.
- **Container Configuration**: The container is configured to use the elineen/todo-app:latest image and mounts the persistent volume at /data.