I currently have a web infrastructure on amazon ec2, with a loadbalancer and three servers apache with a php application on it.
And my database is on amazon RDS.
I am looking for an application which allows me to manage my apache servers and to facilitate the deployment of an update on this three servers.
For example if I want to deploy an update on one of these servers, it can be useful to migrate the actives sessions on another server during the update.
Do you know any application which allow this kind of feature ?