Deployment Case Studies

Deployment case studies provide practical insights into the deployment processes utilized in various environments. Understanding these case studies helps system administrators and DevOps engineers implement effective strategies for deploying applications on Linux systems.

In this case study, we will explore the deployment of a simple web application using Nginx and Docker.

Requirements

• Linux server (Ubuntu 20.04)
• Docker installed
• Nginx as a reverse proxy

Steps

1. Install Docker:

sudo apt update
sudo apt install docker.io

2. Run the web application in a Docker container:

docker run -d -p 3000:80 my-web-app

3. Configure Nginx to reverse proxy to the Docker container:

server {
    listen 80;
    server_name mydomain.com;

    location / {
        proxy_pass http://localhost:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

4. Restart Nginx:

sudo systemctl restart nginx

This case study focuses on deploying a microservices architecture using Kubernetes.

Requirements

• Kubernetes cluster (Minikube for local testing)
• kubectl installed
• Docker for containerization

Steps

1. Create Docker images for each microservice:

docker build -t my-service-1 ./service1
docker build -t my-service-2 ./service2

2. Deploy services to Kubernetes:

kubectl apply -f service1-deployment.yaml
kubectl apply -f service2-deployment.yaml

3. Expose services using NodePort:

kubectl expose deployment my-service-1 --type=NodePort --port=80
kubectl expose deployment my-service-2 --type=NodePort --port=80

Key Takeaways

• Use version control for deployment scripts.
• Automate deployments with CI/CD pipelines.
• Monitor application performance post-deployment.
• Implement rollback strategies for failed deployments.