Upgrading PostgreSQL with Zero Downtime Using Blue/Green Deployment in RDS

Upgrading your PostgreSQL database can be a daunting task, especially when aiming for zero downtime. In this blog, we’ll explore how to leverage blue/green deployment in Amazon RDS to achieve a seamless upgrade process.

What is Blue/Green Deployment?

Blue/green deployment is a strategy that allows you to minimize downtime and risk by running two identical production environments. One (the “blue” environment) is live environment, while the other (the “green” environment) is idle and replicating environment. This approach enables you to deploy changes to the green environment, test them, and then switch traffic to it without affecting users. So in this we will be creating blue/green deployment and then upgrading green deployment to latest postgres version upgrade. Then switching the green deployment with blue deployment

Overview of the Upgrade Process

We’ll cover the following steps:

1. Set Up Blue/Green Deployment
2. Replicate Data from Blue to Green
3. Switch Traffic to the Green Environment
4. Verify and Clean Up

Set Up Blue/Green Deployment