Virtualmin and LAMP Redundancy

Virtualmin
1

At the moment my server is down and is being re built by me uploading the backup files of 16 websites hosting on my server at 20.6kb/sec. I need to get some redundancy built into my system.

I am hosting these sites of a single VPS, but after i have worked these problems out i will be purchasing 3 VPS’s.

I use a LAMP stack and over these 3 new servers i need a way of providing some redundancy, the connection between them will just be a internet connection.

At this time i get my clients to add a A record on their domain which just points to my servers IP.

I want them to use my DNS server on two separate machines

so for example

ns1.mycomp.com > 145.443.234.12
ns2.mycomp.com > 145.443.234.13

But each of these servers has to run the websites, files. How do i keep the files the same and the settings of virtualmin the same on both of these servers?

How do i get the DNS name servers to work on client domains?

On the third server i will put MySQL and Email. Which somehow i will have to link into the first two servers.

How on earth do i go about doing this?

Sorry about these questions like this, but i can’t let this go on with real paying clients, i don’t really expect to have a business after todays event. And i don’t have the premisses to run cluster servers over a gigabit network. Otherwise i would do that.

Thanks, David

2

Before going into details about a possible true synchronized redundancy setup, which can be quite complicated to achieve, my question is: if you’re seriously hosting sites for clients, does your VPS provider not offer on-site FTP backup space?

It would be much easier to perform FTP backups of your Virtualmin domains at regular intervals. In case of hardware failure, just install a new Linux and Virtualmin, which takes maybe 15 minutes, and do a config and domain restore from the (at least 300 times faster) backup FTP server instead of your home system…

Except you’re supposed to offer 99,999% availability to your clients, and 30 minutes downtime - in the rare case of server failure that requires a reinstall - is not acceptable. :slight_smile: