Quoting Martin, Jason H <[EMAIL PROTECTED]> (2005-12-06 00:05:30 GMT): > Has there been any thought into having CFE do failover based on a given > name returning multiple IP addresses? Lets say www.yahoo.com was > hosting my CFE server: > > # host www.yahoo.com > www.yahoo.com is an alias for www.yahoo.akadns.net. > www.yahoo.akadns.net has address 68.142.197.85 > www.yahoo.akadns.net has address 68.142.197.64 > www.yahoo.akadns.net has address 68.142.197.65 > www.yahoo.akadns.net has address 68.142.197.67 > www.yahoo.akadns.net has address 68.142.197.68 > www.yahoo.akadns.net has address 68.142.197.76 > www.yahoo.akadns.net has address 68.142.197.80 > www.yahoo.akadns.net has address 68.142.197.83 > > Cfagent could iterate over the whole list trying to perform a copy, > instead of requiring the user to add a 'failover=' line (which is > therefore limited to just 2 potential sources). One could even expand on > that to have it randomly choose from the list or do some sort of check > (ie ping) to try them in some order. This would be very handy when one > has CFE clients on opposite ends of a 3-way WAN pipe with a CFE server > on each end. Clients would pick the best available server and fail over > to the next best on down until they get one that worked.
I agree, something would be useful. I've been looking at DNS SRV records of late, and they cope with this sort of issue. Think of them as a cross between CNAMEs, DNS round-robin and MX records. However, it would require bespoke DNS queries to take advantage of SRV. http://www.dur.ac.uk/a.d.stribblehill/dns+srv.html describes the system. -- SHANNON SOUTH ROCKALL SOUTHWEST BACKING SOUTH OR SOUTHEAST 4 OR 5. OCCASIONAL RAIN AT FIRST. MODERATE OR GOOD -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. _______________________________________________ Help-cfengine mailing list Help-cfengine@gnu.org http://lists.gnu.org/mailman/listinfo/help-cfengine
