Deploy a new version and route all production traffic to it while keeping the previous version deployed for rollback. Which deployment strategy is this?

Blue/green deployment involves running two identical production environments: "blue" (current version) and "green" (new version). All traffic is routed to the blue environment. When the new version is ready in the green environment, traffic is switched entirely to green. The blue environment is kept running as a fallback, allowing for instant rollback if issues arise with the new version. Canary deployment routes a small percentage of traffic to the new version first, gradually increasing it. Rolling deployment updates instances in a phased manner, one by one or in small batches. Recreate deployment takes down the old version completely before bringing up the new one, leading to downtime.