10k-20k domains on single vps

I don't need emails/cgi/ssl/logs/etc on my vps.
I just need to host 10k-20k domains with index page.
And I wish mod_rewrite could work on that vps.

I couldn't handle with this task with the help of directadmin panel.
Centos 6.9

What could you advise? Is there any manual how to add domains in bulk without any panel? Thanks for any advice.

Wix is hosting about 3.5 million domains from a single IP... I'm sure there is some networking magic and that those are actually on a cluster of many many servers.

I think admins use tools like Chef https://www.chef.io/chef/ to automate the process of host configurations, service restarts, etc and making them all database driven.

There is a lot of custom development in making that happen though.

What about WHM/Cpanel -- I'm sure that would be able to handle a large volume.
But if you are thinking of going for a VPS - I don't think this could handle that much though, due to limited space/memory -- unless if you pay more for the VPS to get a larger size one that can handle your volume.
Most likely a good 16 core dedicated server with 32 GB RAM and 1TB SSD hard drive would be suitable for your usage. Each account created for the domain would take up disk space thus a 1TB SSD drive would be good.

You will surely need a dedicated server for this. mod_rewrite or virtual host config could work for you, but that initial read from the config file will take time because of the high number of entries. So, the initital byte will be slower than usual. You could also try using operating systems that are specifically designed for web hosting, e.g. CloudLinux OS. I don't think Cpanel/Webmin will help, as these are only scripts. They can do what your server can do. These softwares run as services, so they eat up your RAM.