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Blue-Green Deployment: A Safer Path to Zero Downtime
Delivering features faster without sacrificing stability has become the holy grail for DevOps teams. One of the methods to achieve this is blue-green deployment, a release management strategy that minimizes downtime and risk during software deployments. In this article, we’ll dive into what blue-green deployment is, how it works, and why it’s an essential practice for modern software development.
What is Blue-Green Deployment?
Blue-green deployment is a technique where you maintain two production environments — Blue and Green — that are as identical as possible. While one environment (let’s say Blue) is live and handling user traffic, the other (Green) is where the new version of the application is deployed and tested. Once the Green environment is confirmed to be stable, you switch traffic from Blue to Green, instantly bringing the new version live with minimal or no downtime. The previous (Blue) environment is kept intact as a fallback until the new version proves stable, providing a fast rollback option if needed.
The Workflow of Blue-Green Deployment
- Prepare the Green Environment: The current version of the application runs on the Blue environment, handling all traffic. Meanwhile, the Green environment is prepared and is deploying…
