https://en.wikipedia.org/wiki/Blue-green_deployment https://en.wikipedia.org/wiki/Blue-green_deployment DNS not required. You can use a load balancer to do the

https://en.wikipedia.org/wiki/Blue-green_deployment https://en.wikipedia.org/wiki/Blue-green_deployment DNS not required. You can use a load balancer to do the same thing. If you don't want a full second setup, do a rolling restart of application servers instead. Edit: I forgot... you can do this with containers too.