Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Fri, Sep 28, 2007 at 04:46:41PM +0200, Matteo Campana wrote: > > > Lars Ellenberg ha scritto: > >On Thu, Sep 27, 2007 at 01:06:39PM +0200, Matteo Campana wrote: > >>Hi Lars and all the guys in ML :). > >>My problem is to understand the behaviur of my HA system: I have read in > >>the documentation about heartbeat that at least 2 channels of > >>communication between 2 nodes are required to preserve the system from > >>the "split brain" problem (in my system I have 1 ethernet + 1 serial). > >>But....in my tests I see however that DRBD says the "infamous" :) > >>message "split-brain detected" ecc.. . > >>My test: > >> > >> * I disconnect primary node from the ethernet > >> * secondary ----> primary (ok) > >> * I reconnect primary > >> * secondary still remain primary (ok for my config) > >> * the problem is that the two nodes are standalone and not > >> re-syncronize theirs drbd partition. > >> > >>DRBD does not use also the serial channel in order to communicate > >>between the nodes? > > > >um. it does use the heartbeat communication infrastructure, > >if you configure the "outdate-peer handler", in which case it had > >outdated the other node, before you try to make it primary, > >thus preventing you from going online with stale data. > > I need to recompile heartbeat to use the "outdate-peer" plugin? > (currently I'm using the heartbeat package for Debian). I think that you should use the "backports" heartbeat 2.1.2, and that should include the "dopt" already. "someone" should probably write up a walk through for how to set it all up "properly"... otherwise, it should be more or less the same as what we have in drbd svn / tarball in the "tools" subdir. so no, you don't need to recompile heartbeat, but either use a more recent heartbeat package that includes it, or compile this heartbeat plugin from the drbd source tarball. -- : Lars Ellenberg http://www.linbit.com : : DRBD/HA support and consulting sales at linbit.com : : LINBIT Information Technologies GmbH Tel +43-1-8178292-0 : : Vivenotgasse 48, A-1120 Vienna/Europe Fax +43-1-8178292-82 : __ please use the "List-Reply" function of your email client.