12 factor Cloud native web application

The 12-factor app is a methodology for building software-as-a-service (SaaS) applications that are cloud-native and distributed. The 12 factors are a set of best practices that are independent of programming languages and software stacks, and can be applied to a variety of apps. The goal of the 12-factor app is to make applications more portable, resilient, scalable, and robust when deployed to the web. Used google cloud platform to develop this. Made with Love and Fun.

Architecture Diagram:

This repository can act as tutorial or example project for following concepts

Employed 12-factor methodology to create user auth CI/CD project with cloud and devops best practices.

Implementation details:

• Developed a robust RESTful API using Python Flask, Postgresql and Pytest
• Utilized REST Assured for comprehensive integration testing, ensuring reliability and performance
• Crafted custom compute engine images using HashiCorp Packer
• Implemented systemd service files for smooth application startup
• Established secure VPCs, subnets, and CloudSQL instances
• Enabled VPC peering and private service access for enhanced security
• Leveraged Cloud DNS for seamless domain resolution
• Configured Ops Agent for streamlined application logging, ensuring observability and troubleshooting ease
• Orchestrated message publication to Google Pub/Sub topics
• Triggered Cloud Functions for automated email verification using Sinch Mailgun
• Engineered compute instance templates, and managed instance groups, and load balancers for autoscaling based on the CPU utilization metrics.
• Implemented SSL certificates managed by GCP
• Enabled automated rolling updates on merge to ensure seamless deployment

Other repositories in this project.

• Terraform code to build Infrastructure on GCP platform
• Cloud Function Repo or Serverless code

Packer runs

Install plugins

packer init packer/gci-machine-image.pkr.hcl

Format the packer file

packer fmt packer/gci-machine-image.pkr.hcl

Validate packer configuration

packer validate packer/gci-machine-image.pkr.hcl

Build Image and upload google cloud

packer build packer/gci-machine-image.pkr.hcl

Note: In an ideal situation when a developer raises a PR, GitHub actions automatically trigger the integration tests, build GCI image, and deploy in the GCP cloud automatically. Please check out the GitHub actions for more details.