How to deploy php application to multiple servers?

Question

PHP

There is an application on several servers and one balancer.
The developers made changes and pushed it into the git, and you need to pour it on all the servers.
And there you need to assemble the front and do composer install. And while this is being done, everything falls off. This should not be.
What's the best way to do it?
What tools do you use?

Answer 1

https://deployer.org
Great tool. Pick up and roll. written in php

Answer 2

The easiest way is to use docker containers that will be collected in a pipeline and pushed into the docker registry. And then you can deploy either on k8s or docker swarm cluster without downtime.