Maros Timko wrote:
Heiko,
whhich machine crashes? Primary only, both?
I think it is primary but only in case xen VM is running on top of DRBD. You can prevent crashes by disabling TOE. Or use DRBD 8.3.2, AFAIK there should be a parameter that should help in such setups.
Check older posts in this list.
Tino

Hello Tino,

in one case I have a primary on each machine, means 2 drbd devices.
In the other case we have only 1 drbd device, and there only the primary crashed.
What means TOE, havent found anything about that yet?
Someone on this list suggested that I should use protocol A, but we dont want to loose
any data, so we cant use that.
I am thinking about updating, but I first have to test if these packages work with our system,
CentOS 5.x.

so long

2009/7/27 Heiko <[email protected] <mailto:[email protected]>>



    On Mon, Jul 27, 2009 at 2:18 PM, Martin Gombac <[email protected]
    <mailto:[email protected]>> 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 crashes.
    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 172.17.8.201
    ucast eth0 172.17.8.202
    ucast eth1 172.31.0.1
    ucast eth1 172.31.0.2
    node xen-a1.fra1
    node xen-b1.fra1
    auto_failback on

    haresources:

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

    thnx a lot


    .r


        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.
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