Use this tag to describe questions related to Blue-Green Deployments, the technique for delivering zero-downtime deployments in a continuous deployment pipeline.
Blue-Green Deployment is a technique for supporting zero or low-downtime deployments. Engineers implement Blue-Green Deployments by provisioning identical sets of infrastructure labelled "Blue" and "Green", both pieces of infrastructure sit behind a router or load balancer:
At any one time, either Blue or Green is active and serving live traffic; make all deployments to the inactive infrastructure, where they can be deployed and verified without impacting the live infrastructure. When a deployment is validated, the router is configured to switch traffic from the current live infrastructure to the newly deployed infrastructure.
Blue-Green Deployment is related to the concepts of Immutable Infrastructure and Canary Releasing.
