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Old 07-23-2008, 07:11 PM   #1
Registered: Mar 2005
Posts: 103

Rep: Reputation: 15
Question server redundancy

I need to setup some servers for redundancy (same data center).

I saw this now:

I will use Debian and Cpanel for this project.

My questions regarding that article:

- what exactly is the "virtual IP"?

For example:

Let's say the resolvers (yes, resolvers in resolvers.conf)

The *server* IP for server #1 is

The *server* IP for server #2 is:


What/where is this "virtual IP" the article refers to? I'll admit I scanned the article quickly, so bear with me

Also, any issues using cpanel / debian for this method?

Partner's outlined architecture / setup goal:

box 1 – site #1
- some sort of redundancy
- local backup of mysqldbs, and web site files

box 2 - media server
- Debian OS
- local backup to NAS with rsync (about 80GB but growing)

media server (ftp) - not sure where that is now - but seems like a good place to put it ability to easily add ftp access to specific directories for some customers to upload audio content staff ftp sharing area public ftp area that staff can upload to

box 3 -
- centos
- redundant server setup

Last edited by I_AM; 07-23-2008 at 07:30 PM.
Old 07-24-2008, 10:34 AM   #2
Registered: Mar 2005
Posts: 103

Original Poster
Rep: Reputation: 15
Can someone please assist? In a bit of a rush.
Old 07-24-2008, 01:48 PM   #3
Registered: Sep 2007
Location: SF Bay Area, CA
Distribution: CentOS, SLES 10+, RHEL 3+, Debian Sarge
Posts: 159

Rep: Reputation: 32
A virtual IP, in this case, is an IP that is "shared" by a group (called cluster) of servers for a specific service/application. Typically, this is used for HA and/or load balancing purposes.

For example, in your case, you would specify:


(or any other IP that isn't being used really)

As a virtual IP (VIP for short). It will be configured at some point (in your case, during heartbeat configuration), and shared between your .2 and .3 servers. They will in most cases take turns in answering incoming connections to .4.

I don't use debian for clusters, so I can't tell ya...people typically use Redhat for that purpose.


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