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Mastering Microservices Deployment: A Step-by-Step Guide to Deploying User Authentication Service Using Docker, Kubernetes, and Rancher


In this guide, we'll walk you through the process of deploying a well-defined User Authentication microservice. We'll use a stack comprising CentOS, Docker, Kubernetes, Rancher, Jenkins, Prometheus, Helm, MongoDB, Kong, and HAproxy on a dedicated server from

Step 1: Setting up the Environment

1.1 Setting up CentOS

Install the latest version of CentOS on your dedicated server provided by DomainIndia. Make sure all necessary security updates are installed.

1.2 Installing Necessary Software

Install Docker, Kubernetes, Jenkins, Prometheus, Helm, MongoDB, Kong, and HAproxy. Make sure to verify successful installations.

Step 2: Developing the User Service

Develop your User Authentication service. This service should handle user data management and authentication processes. Once the service is developed, test it thoroughly.

Step 3: Containerizing the User Service with Docker

3.1 Writing a Dockerfile

Write a Dockerfile for your service. This file should define how to build a Docker image of your service, including defining the base image, copying your code into the image, and specifying any necessary dependencies.

3.2 Building and Testing the Docker Image

Use Docker to build an image from your Dockerfile, then run the image to create a container. Test the container to ensure that your service runs correctly within it.

Step 4: Deploying the User Service with Kubernetes

4.1 Writing a Kubernetes Deployment Manifest

Write a Kubernetes Deployment manifest for your service. This will define how your service should be deployed on Kubernetes.

4.2 Deploying the Service

Use kubectl to deploy your service to Kubernetes. Verify the deployment.

Step 5: Managing the Deployment with Rancher

Use Rancher to manage your Kubernetes cluster. Import your cluster into Rancher and use its user interface to observe your running services.

Step 6: Setting Up Continuous Integration/Continuous Deployment with Jenkins

Set up a Jenkins pipeline for your service. This pipeline should automatically build a new Docker image and deploy it to Kubernetes whenever you make changes to your service's code.

Step 7: Monitoring Your Service with Prometheus

Set up Prometheus to scrape metrics from your service. Use these metrics to monitor the performance and health of your service.

Step 8: Managing Configuration with Helm

Use Helm to manage the configuration of your Kubernetes deployments. Write a Helm chart for your service.

Step 9: Setting Up Your Database with MongoDB

Set up a MongoDB database for your service. This database will store your user data.

Step 10: Managing Access to Your Service with Kong

Set up Kong as your API gateway. This will manage external access to your service.

Step 11: Load Balancing with HAproxy

Use HAproxy to distribute network traffic to your service. This will help ensure that your service remains available even under heavy load.


Congratulations! You have successfully deployed your User Authentication microservice using Docker, Kubernetes, and Rancher. By following this guide, you've taken a big step towards mastering microservices deployment.

Remember, this is a continuous learning process. Keep refining and improving your setup to better meet your users' needs and the goals of your organization. Happy deploying!

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