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On Tue, 31 Mar 2009, Fabio Coatti wrote:
> Basically, the scenario is the following: 5 servers (RIP),
> balanced with ipvs on linux 2.6.23, DR is used. All works
> just fine, but if for some reasons the real servers
> freezes and need reboot, ipvs keeps as "alive" all the
> connections so the balancing is not correctly done.
ipvs has no way of knowing that a machine has been rebooted,
so this is the expected behaviour. Health checking is all
external to ipvs. Since in LVS-DR the director doesn't see
the returning packets, it has to guess when connections
expire, and you've set a long timeout.
Either
o use the -SH scheduler to direct clients to the same
database server and return the timeouts to the default
period.
o use one of the ioctls that Horms wrote to handle crashed
realservers when ipvs is using persistence. These clear out
the connection table
Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!
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