I am currently using Amazon Lightsail to provide Wordpress Multisite Hosting for a couple of my clients, but I'm running into an issue.
I am working with the following technologies:
1) Wordpress Multisite (2 installations on the same server)
2) Webmin / Virtualmin for server management
3) Amazon Lightsail for Server provisioning
4) Amazon Lightsail Static IP (Pointed to the lightsail server)
Currently Amazon Lightsail only allows 1 static IP address to be assigned to an instance, however, to avoid DNS conflicts, I want to give a dedicated IP address to each wordpress multisite installation.
Webmin / Virtualmin has the ability to manage multiple IP addresses and allows me to assign a specific IP address to a new virtual server once it's provisioned. (detailed here: https://www.hostwinds.com/guide/add-new-ip-address-virtualmin/)
The issue I'm facing is that if a new website (a wordpress multisite's child-site) is set up, the two installations will get "confused" on where to route the domain if they are both running on the same IP address. The current workaround i've used is to set up the domain as an alias to the multisite installation I want to be used. This is effective, but inefficient.
I'm a newbie when it comes to the in-depth setup of server networking so I am hoping to have some assistance here. answering one of these questions may allow me to achieve this goal:
Is there any way to use an ADDITIONAL static IP address with Amazon lightsail?
Is there a way to register / lease / purchase an IP Address from an EXTERNAL source and make it work with my installation?
Is there a way to use this multiple IPv4 addresses for EC2 Solution on Lightsail?
If nothing else, I would just provision a new server and separate the two multisite installations, but then I need to double-up my server management.
At the present time, there is no way to assign two static IP's to a single lightsail instance.
FWIW: I run multiple wordpress instances on a single lightsail instance with no issues. I'm not using multi-site though.
If you're running multiple wordpress multi-site instances on a single server, you probably want to think about using two lightsail instances.