Haproxy on-site installation horizontal balancing
We have an on-site installation of a customer, where they have setup haproxy as a load balancer that is distributing request to 2 application servers, these 2 application servers communicate with a single database.
Something similar to what is described here:
We will now pass the customizations that are in one package, (including sql scripts, new objects, etc) from our development environment to the customer environment.
My question is: how to assure that the the package that is installed, is installed in both application servers? As anyone had any experience with something similar and are there any guidelines on do in such cases?