I've read the Redis install guide for Ubuntu 16.04: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-redis-on-ubuntu-16-04 (http://)
What about configuring more than one instance of Redis ...
Let's say I have two subdomains set on one droplet.
app.mydomain.com and api.mydomain.com
app.mydomain.com makes a request to api.mydomain.com which then returns data to app.mydomain.com. I've tested this and it works...