On Mon, Dec 27, 1999 at 07:06:36PM +0800, Michael Boman wrote:
> I am writing to you all looking for some answers for a future project.. Is
> it possible to do a cluster of qmail servers using DNS and NFS?
>
> This is what I am planning to do:
>
> DNS:
> ====
>
> Add serveral MX records in the DNS
>
> Add a few mashines with different IP but the same hostname in the DNS
> (So the DNS will switch between the servers).
I'm doing the same thing with one MX record which points to a name with
multiple IPs on it. Same idea, more transparent.
> The computers:
> ==============
>
> mail00: The master server, using raid 5, have allot of diskspace,
> memory etc..
Like our comin-up NetApp :)
> mail01-xx: Slave servers. Same software configuration except that the
> /home/vpopmail and /var/qmail/ is NFS mounted from mail00. Running on
> a cheaper computer (no raid).
>
> I am running:
>
> qmail 1.03
> ezmlm 0.53
> vpopmail 3.4.10
> sqwebmail 0.26
> qmailadmin 0.25
>
> Services provided: SMTP/POP3/IMAP(?)/WebBased mail
>
> Can you see any problems with this setup? What should I think about?
The big problem is your mail00 - if that one goes down, all is gone.
There are basically 2 ways to solve your problem: this one, or having front-end
mailservers that know which users are on which system, and something similar
to that for POP. casema.net is running this, for example.
Greetz, Peter.
--
Peter van Dijk - student/sysadmin/ircoper/madly in love/pretending coder
|
| 'C makes it easy to shoot yourself in the foot;
| C++ makes it harder, but when you do it blows your whole leg off.'
| Bjarne Stroustrup, Inventor of C++
