Date: Wed, 25 Feb 1998 14:30:17 +0000 From: Marco Masotti <masotti@mclink.it> To: questions@FreeBSD.ORG Cc: masotti@mclink.it Subject: Web fault folerance through DNS Round Robin and Ip alias Message-ID: <34F42AF9.167EB0E7@mclink.it>
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I would like to provide a web service with a a sort of "fault
tolerance", using DNS round robin and IP alias technique.
The scheme is fairly conventional: the DNS round robin would spread the
web requests between two machines, mapping to the respective IP alias
addresses.
In the same time the two machines, using simple shell scripts, monitor
each others pinging to the primary ip addresses.
As soon as one of the two machines doesn't reply to the ping, it's
assumed to be faulty by the other still alive, that immediately
temporarily install the Ip alias corresponding to the faulty machine.
As soon as the first machine comes back from outage, the second one
de-install the temporary Ip alias.
My question is:
---------------
Is anywhere available a ready set of scripts that can do the simple
job I want?
Thanks for any help
- Marco M.
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