Hi guys,
I cannot find any documentation on best practices and guidelines to deploy Magento in multiple web front ends (multiple apache versions connecting to a single database).
In practice, I'm experiencing serious issues when it comes to upgrades and session storage (each frontend running redis on master/slave config.).
Are there restrictions that I'm not aware of that prevent this kind of setup? I'd like to have 2 or 3 magento web frontends behind a load balancer and while I can get it to work at first, it breaks after either upgrading magento, or taking the master redis server offline (maybe my redis backup config on env.php is wrong?