I am trying to create a setup where my main store is on www.mystore.com (behind a google cloud load balancer)
I would like to create another machine that has the admin accessible via subdomain,
I am having trouble doing so. I tried to go into the Magento configuration > advanced > admin and set
Use Custom Admin URL: http://admin.mystore.com/
Use Custom Admin Path: <leave blank>
in my env.php I have my admin front, set us admin.
So I'm trying to access via http://admin.mystore.com/admin
but I am having a lot of redirect issues and this does not seem to be working properly.
Any ideas, if this is the right configuration to or should I be doing it elsewhere? Hoping it is possible.