Before we dive into the project, you should have the following in place:

• Docker installed on your local machine.

• Access to multiple machines (virtual or physical) to set up the Docker Swarm cluster.

Project Steps

GitHub Repository: github.com/Rohit123890/node-todo-cicd.git

1. Dockerize the Web Application

• Create a Dockerfile for your web application.

• Build a Docker image containing your application and its dependencies.

2. Set Up a Docker Swarm Cluster

• Initialize a Docker Swarm cluster with multiple nodes.

• Join worker nodes to the Swarm cluster.

3. Deploy the Web Application as a Service

• Deploy your Docker image as a service in the Swarm.

• Configure the service to utilize Docker Swarm's load balancing.

4. Test High Availability and Load Balancing

• Simulate node failures and observe how Docker Swarm maintains service availability.

• Send traffic to your application and see how Swarm load balancing works.

5. Perform Rolling Updates

• Update your web application while ensuring continuous service availability.

• Monitor the update process and verify that it doesn't impact users.

Conclusion

You'll see firsthand how Swarm simplifies tasks such as high availability, load balancing, rolling updates, and horizontal scaling, making it a powerful choice for orchestrating containers in production environments.