I am currently re-structuring the (poor) hosting workflow that my company has been using to host our clients’ websites.

Current Setup:

• WHMCS, WHM, cPanel on Shared Server (insert cringe here)
• Billing through QuickBooks, not WHMCS (for whatever reason)
• Making accounts in WHMCS manually

Clearly, this is not a viable setup. It’s a hassle and billing is even worse. The sites are slow and I can’t change PHP limits or permissions, making many backup and migrations impossible. Below is a general explanation of what I wish to do.

Future Setup:

• Small Ubuntu Droplet for (our) company homepage
• Large Ubuntu Droplet for client hosting

In the latter (Large) droplet, the following setup:

• WHMCS (manages Billing, Domains, Hosting Packages, Support System, Maintenance Notifications, etc.)
• WHM (implements WHMCS automation and users)
• cPanel (we believe that on the rare occasion a client desires access to make chances on the backend, cPanel is the best option)
• The Websites - Roughly 10 of them in our current situation.

My Question:

It’s all a good Idea, but I’ve never worked with a single VPS hosting groups of websites on the same disk. My questions are as follows:

• How do I partition the server to host several WordPress websites while maintaining reliability and isolation from one-another (in other words, being able to make PHP changes, etc without having an adverse effect on other sites)
• How do I set up WHM(CS) to manipulate said partitions
• How can I automate WordPress installation without having to use cPanel or manual setup. Because all of the websites run on the same infrastructure (PHP, SQL, WordPress), I want to find an efficient way to automate the WordPress installation. Ideally, after someone makes their first payment, the following will happen:

1. Environment is set up (Server space is allotted)
2. WordPress and it’s prerequisites are installed
3. I can go to the domain which points to the installation and complete the graphic WP setup.

I do appreciate everyone who shares their input. Much thanks,

Brennen