[SATLUG] Simple fail-over options

[Victor]

How about this?

Run BIND on both servers. Primary server is ns1, backup is ns2. Both
servers have their respective A records and if the primary server
crashes it fails over to the other one.

On 11/14/07, Channing.ML <Channing.ML at channingc.com> wrote:
> Samuel Leon wrote:
> > I need to get redundancy on a business webserver.  Not really sure how
> > to go about this.  First I got to figure out the best way to keep the
> > 2 servers synced.  And then I was thinking about maybe writing a bash
> > script on server#2 or something that would ping server#1 every minute
> > or so.  Then if the ping times out, it will run another script to
> > change its IP to server#1's IP.  Seems like it would work as long as
> > server#1 is truly down and doesn't come back to life and we end up
> > with 2 of the same IP's on the same network.  Sound good or alittle
> > too dirty?
> >
> >
> > Sam
> Regarding file-system synchronizing, here is a tool that I read about
> some time back, but have not had a chance to use yet.  It's based on
> rsync, but targets those needs such as you have described.
>
> http://blog.kowalczyk.info/articles/usingUnison.html
>
> There are also tools such as drdb & enbd which are designed to mirror
> filesystems across a network (think RAID 1 via TCP/IP).
>
> HTH,
> Channing
>
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