I think it would make it more complicated if we setup a third node.
On 10/28/2011 11:11 AM, Van Tonder, Raymond wrote:
On 10/28/2011 9:28 AM, Andreas Kurz wrote:
> Hello,
>
> On 10/28/2011 04:06 PM, Joe wrote:
>> Hello everyone,
>>
>> My goal is to build a HA DRBD and MYSQL on two
nodes(active/passive). I
>> followed the " cluster from scratch" article to build this
environment.
>> If I do standby failover host, it works fine but when I pull the
>> heartbeat cable from the active node, the resources do not fail
over to
>> the secondary. Please advise. Thank you very much. Joe
> * "the" heartbeat cable == one heartbeat cable? Not supported setup --
> use at least two heartbeat channels, add at least the DRBD replication
> network.
>
> * you produced a split brain situation. I'd expect you see errors in
> your cluster status and see DRBD log entries with a wording similar to
> "not allowed to become primary because allow-two-primaries is not set"
> ... if you had also pulled DRBD link you would have all resources
> running twice
>
> * use stonith to recover from a split-brain situation (or block if its
> unsuccessful)
>
> * read more manuals ;-)
>
>> *CENTOS 5.6/drbd8.3/corosync/pacemaker
>>
>> node-0 IP: 192.168.1.101 (heartbeat) 10.0.0.10 (drdb)
>> node-1 IP: 192.168.1.102 (heartbeat) 10.0.0.20 ( drbd)
>> Cluster Virtual IP: 192.168.1.160
>>
>> * _crm configure show_
>> node $id="2b68511d-b96f-4b56-9f66-70262e3e2c46" mysqldrbd01 \
>> attributes standby="off"
>> node $id="d86dc58b-2309-43d9-af96-6519127e83d7" mysqldrbd02 \
>> attributes standby="off"
> These ids are from Heartbeat CCM ... but you attached a Corosync
> configuration? Decide for one ... either Heartbeat or Corosync.
>
> Regards,
> Andreas
>
>
>
I would suggest adding a third node (without the mysql and drdb) just
for quorum/heartbeat checking
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