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hi,
After trying to use Direct Routing on an ATM network I discovered that
because of the ATM it is not possible to have duplicate MAC addresses for a
single IP. The cluster will be a telnet / compute cluster which will load
balance telnet, ftp, and SSH traffic.
To solve the problem I am proposing the following setup:
INTERNET
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DIRECTOR eth0
DIRECTOR eth1
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Node1 eth1
Node2 eth1
Node3 eth1
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Node1 eth0
Node2 eth0
Node3 eth0
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INTERNET
I am planning to use NAT LVS with the real servers sending all data back
via the director to ensure only one MAC address for the cluster VIP.
However - for performance, and because the cluster is to be used for a
compute cluster, I need external access to the individual machines via the
internet, and the machines need a high speed link to the external network
(for fileserver and database access) a director bottleneck is not acceptable.
So... Each Real-Server will have both access to a private network for
cluster communications, and the public network for file-server / admin
communications. BUT all traffic for the cluster VIP must travel via the
director to ensure that there is only one machine communicating via the VIP.
I know this will probably create all sorts of routing problems but this is
the only solution that I can think of.
Any suggestions / comments would be really welcome.
Cheers,
Steve.
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