DZone

Today, I’d like to offer an approach that will allow most organizations to proceed with zero-downtime deployments with help from the Hazelcast platform.

Applications Are Not Stateless!

A couple of years ago, I became interested in Continuous Deployment as the natural extension of my deep interest in Continuous Integration. Among the CD patterns, Blue-Green deployment was the first. Here’s a sample architecture:  The idea is that a router component directs the requests to one environment; by convention blue. This environment contains all the necessary components for the application to achieve its task. Meanwhile, Ops can deploy a new version of the application in the green environment. When all is ready, they can switch the router to direct all the requests to the new green environment.

Source: DZone