Blue-Green Deployments - What Are They and Why Are They Important?
Introduction With all the higher-level patterns I wanted to go back to basics a little bit and look at Blue-Green deployments. Though it can be deemed a design pattern (we’d certainly have to keep it in mind when we design our application), it’s probably more of a deployment strategy.
What is a Blue-Green Deployment? A blue-green deployment is a software deployment strategy that involves creating two identical production environments, one for the current production release (blue) and one for the new release (green). Traffic is initially routed to the blue environment. Once the green environment is tested and ready, traffic gets switched over to green. Now intense monitoring takes place, we’re talking people glued to Grafana dashboards watching for things like exceptions, abnormal performance spikes, etc.
