When deploying new software releases to servers or (insert -as-a-service> here), it’s a good idea to either deploy the releases in a controlled manner or to have a quick rollback plan. This article will be diving into blue/green deployments, canary deployments, ring-based deployments, and feature tag deployments. Blue/Green Deployments Blue/green deployments are a deployment model where a new application version never gets deployed to the production servers (green) directly. Instead, it gets deployed to another set of servers (blue) first.