[Linux-ha-dev] Food for thought: add something like cutter to IPaddr2 (or portblock?) RA

[Michael Schwartzkopff]

Am Montag, 13. Oktober 2008 13:38 schrieb Florian Haas:
> Hello,
>
> inspired by a discussion with the SerNet guys at Linux Kongress last
> week, here's a thought I'd like to poll comments on.
>
(...)
> Now I wonder if one could add functionality to the IPaddr2 RA to achieve
> in essence the same thing. Suppose that triggered by an optional
> resource parameter, IPaddr2 would invoke a mechanism similar to the one
> employed by cutter (http://www.lowth.com/cutter/) after IP address
> takeover. In conjunction with a TCP connection state replication utility
> such as conntrackd (http://conntrack-tools.netfilter.org/), this should
> enable the RA to actively cut off TCP connections to that IP address,
> forcing a client reconnect.
(...)

Nice idea. What happens if conntrackd is activated on a cluster and a failover 
occures? Shouldn't the application send a RST on its own? Anybody tried this?

Greetings,

-- 
Dr. Michael Schwartzkopff
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