Migrating a fragile manual deployment process to a robust Zero-Downtime architecture using Docker, GitHub Actions, and Prometheus.
View ArchitectureA rapidly growing SaaS startup was facing critical stability issues. Deployment was a manual, error-prone process that took hours, leading to developer fatigue and customer dissatisfaction due to frequent outages.
user@prod-server:~$ git pull origin master
> Unpacking objects: 100% (45/45), done.
user@prod-server:~$ npm install
> added 142 packages in 8s
user@prod-server:~$ npm start
> Starting production server...
> Error: EADDRINUSE: address already in use :::80
> Critical: Database schema mismatch detected.
> System crashing... [Segmentation fault]
FATAL ERRORI implemented a fully automated pipeline to ensure consistency and reliability. Every commit is tested, built into a Docker container, and deployed with zero downtime.
Leveraged GitHub Actions to run automated unit tests and build Docker images upon every push to the `main` branch.
Packaged the application with Docker to eliminate "it works on my machine" issues and ensure environment parity.
Configured Nginx as a Reverse Proxy to handle Blue-Green deployments, ensuring users experience no interruptions during updates.
Deployed Prometheus & Grafana to scrape metrics and visualize system health (CPU, Memory, Request Rate) in real-time.