[DRBD-user] GFS2 freezes

[Zohair Raza]

Hi,

What are disadvantages of disabling fencing

It worked for me with fencing disabled, Now I still have access to my gfs2
partition when one node is unplugged

I have only this in cluster.conf

<?xml version="1.0"?>
<cluster alias="cluster-setup" config_version="1" name="cluster-setup">
  <rm log_level="4"/>
  <fence_daemon clean_start="1"/>
  <clusternodes>
    <clusternode name="node1" nodeid="1" votes="1">
        <fence> </fence>
    </clusternode>
    <clusternode name="node2" nodeid="2" votes="1">
        <fence> </fence>
    </clusternode>
  </clusternodes>
  <cman expected_votes="1" two_node="1"/>
        <dlm enable_fencing="0"/>
</cluster>

and this in drbd.conf

global { usage-count yes; }
common { syncer { rate 100M; } }
resource res0 {
  protocol C;
  startup {
    wfc-timeout 20;
    degr-wfc-timeout 10;
    # we will keep this commented until tested successfully:
     become-primary-on both;
  }
  net {
    # the encryption part can be omitted when using a dedicated link for
DRBD only:
    # cram-hmac-alg sha1;
    # shared-secret anysecrethere123;
    allow-two-primaries;
  }
  on node1 {
    device /dev/drbd0;
    disk /dev/sdb1;
    address 192.168.23.128:7789;
    meta-disk internal;
  }
  on node2 {
    device /dev/drbd0;
    disk /dev/sdb1;
    address 192.168.23.129:7789;
    meta-disk internal;
  }
  disk {
    fencing dont-care;
  }
}


but still I see messages in log trying to fence other node

Oct 29 15:15:37 node1 corosync[1319]:   [MAIN  ] Completed service
synchronization, ready to provide service.
Oct 29 15:15:37 node1 kernel: dlm: closing connection to node 2
Oct 29 15:15:37 node1 fenced[1377]: fencing node node2
Oct 29 15:15:37 node1 fenced[1377]: fence node2 dev 0.0 agent none result:
error no method
Oct 29 15:15:37 node1 fenced[1377]: fence node2 failed
Oct 29 15:15:40 node1 fenced[1377]: fencing node node2




Regards,
Zohair Raza



On Mon, Oct 29, 2012 at 7:08 PM, Felix Frank <ff at mpexnet.de> wrote:

> Hi,
>
> On 10/29/2012 02:43 PM, Maurits van de Lande wrote:
> > I think that adding the following option to the dlm section in
> cluster.conf
> >
> > enable_fencing="0"
> >
> > might solve this problem. (but I have not tested this) This will disable
> > fencing.
>
> ...but from what I remember from training and other threads here, it is
> a Bad Idea to have a production dual-primary setup without fencing.
>
> Cheers,
> Felix
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
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>
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