[Users] Cluster corosync mulicast issue

[Itamar Heim]

On 03/13/2013 07:21 PM, Winfried de Heiden wrote:
> Hi all,
>
> I have no idea if it is ovirt related, nevertheless I give it a try.
> Playing around with Red Hat Clustering I created a 3 node cluster.
>
> It seems to works fine, but after changing a couple of things
> /var/log/messages is flooding with warnings like:
>
> Mar 13 18:13:58 node3 corosync[1560]:   [TOTEM ] Retransmit List: 9b 9c
> 88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a
> Mar 13 18:13:58 node3 corosync[1560]:   [TOTEM ] Retransmit List: 9b 9c
> 88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a
> Mar 13 18:13:58 node3 corosync[1560]:   [TOTEM ] Retransmit List: 9b 9c
> 88 8a 8b 8e 8f 90 91 92 93 94 95 96 97 98 99 9a
>
> It seems multicast related, which all seems fine:
>
> [root at node1 ~]# netstat -g
> IPv6/IPv4 Group Memberships
> Interface       RefCnt Group
> --------------- ------ ---------------------
> lo              1      all-systems.mcast.net
> eth0            1      239.192.7.246
> eth0            1      all-systems.mcast.net
> eth1            1      all-systems.mcast.net
>
> Testing with omping works well.
>
> OK, I'm using home hardware, but the 3 nodes are doing virtually
> nothing. It's on one local network, using local storage etc.
>
> Anyone familiar with this problem? That is: after some "heavy"
> multicasting packages seem not to arrive.
>
> It might be an virtio network thing, ovirt...?
>
>
>
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I'm not clear on what you are trying to cluster - the hosts, or 3 guests?
if the hosts - why?

thanks,
    Itamar