[DRBD-user] testing drbd without real deices

Heiko rupertt at gmail.com
Mon Jul 27 14:29:06 CEST 2009

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Mon, Jul 27, 2009 at 2:18 PM, Martin Gombac <martin at isg.si> wrote:

> In my humble opinion, drbd does't crash if you loose network connections.
> :-)
> Would be a first in history.
> Maybe heartbeat puts both sources to primary and when they join you got
> split brain.
> In this case you didn't set up heartbeat correctly.
Hello M.,

i had some people here that confirmed a bug in protocol C that causes these
I also thought of heartbeat, but I now have 2 ucast devices and we still
have crashes and
no entries in the logfile that say it does a reboot on purpose:

only these messages:

heartbeat[2880]: 2009/07/27_11:59:37 ERROR: glib: Unable to send [-1] ucast
packet: No such device
heartbeat[2880]: 2009/07/27_11:59:37 ERROR: write_child: write failure on
ucast eth0.: No such device

my ha config looks like this

#use_logd on
logfile /var/log/ha-log
debugfile /var/log/ha-debug
logfacility local0
keepalive 2
deadtime 10
warntime 3
initdead 20
udpport 694
ucast eth0
ucast eth0
ucast eth1
ucast eth1
node xen-a1.fra1
node xen-b1.fra1
auto_failback on


xen-a1.fra1 drbddisk::blrg  xen::blrg-vm1

thnx a lot


> Regards,
> M.
> On 27, Jul2009, at 1:47 PM, Heiko wrote:
>  Hello,
>> i have to convince my boss that our server crashes i reported on this list
>> are due
>> to a non exsiting dedicated line! We have all our drbd traffic routed
>> through switches
>> and they often just crash.
>> Now I have to create a test setup to show them that when I plug the
>> corg/shutdown the networkdevice
>> the machines tend to crash.
>> Since I dont have any spare machines I would like to use loopback devices,
>> are these supported by now? I found some list entries that say this is not
>> supported by drbd!
>> would this be enough to get the machines crashing?
>> We use drbd8.0 and 8.2 and have on both these crashes.
>> cheers.
>> _______________________________________________
>> drbd-user mailing list
>> drbd-user at lists.linbit.com
>> http://lists.linbit.com/mailman/listinfo/drbd-user
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