[Pacemaker] Failback problem with active/active cluster

[Charles KOPROWSKI]

Le 11/03/2011 11:47, Andrew Beekhof a écrit :
> On Thu, Mar 10, 2011 at 1:50 PM, Charles KOPROWSKI<cko at audaxis.com>  wrote:
>> Hello,
>>
>> I set up a 2 nodes cluster (active/active) to build an http reverse
>> proxy/firewall. There is one vip shared by both nodes and an apache instance
>> running on each node.
>>
>> Here is the configuration :
>>
>> node lpa \
>>         attributes standby="off"
>> node lpb \
>>         attributes standby="off"
>> primitive ClusterIP ocf:heartbeat:IPaddr2 \
>>         params ip="10.1.52.3" cidr_netmask="16" clusterip_hash="sourceip" \
>>         op monitor interval="30s"
>> primitive HttpProxy ocf:heartbeat:apache \
>>         params configfile="/etc/apache2/apache2.conf" \
>>         op monitor interval="1min"
>> clone HttpProxyClone HttpProxy
>> clone ProxyIP ClusterIP \
>>         meta globally-unique="true" clone-max="2" clone-node-max="2"
>> colocation HttpProxy-with-ClusterIP inf: HttpProxyClone ProxyIP
>> order HttpProxyClone-after-ProxyIP inf: ProxyIP HttpProxyClone
>> property $id="cib-bootstrap-options" \
>>         dc-version="1.0.8-042548a451fce8400660f6031f4da6f0223dd5dd" \
>>         cluster-infrastructure="openais" \
>>         expected-quorum-votes="2" \
>>         stonith-enabled="false" \
>>         no-quorum-policy="ignore"
>>
>>
>> Everything works fine at the beginning :
>>
>>
>> Online: [ lpa lpb ]
>>
>>   Clone Set: ProxyIP (unique)
>>      ClusterIP:0        (ocf::heartbeat:IPaddr2):       Started lpa
>>      ClusterIP:1        (ocf::heartbeat:IPaddr2):       Started lpb
>>   Clone Set: HttpProxyClone
>>      Started: [ lpa lpb ]
>>
>>
>> But after simulating an outage of one of the nodes with "crm node standby"
>> and a recovery with "crm node online", all resources stay on the same node :
>>
>>
>> Online: [ lpa lpb ]
>>
>>   Clone Set: ProxyIP (unique)
>>      ClusterIP:0        (ocf::heartbeat:IPaddr2):       Started lpa
>>      ClusterIP:1        (ocf::heartbeat:IPaddr2):       Started lpa
>>   Clone Set: HttpProxyClone
>>      Started: [ lpa ]
>>      Stopped: [ HttpProxy:1 ]
>>
>>
>> Can you tell me if something is wrong in my configuration ?
>
> Essentially you have encountered a limitation in the allocation
> algorithm for clones in 1.0.x
> The recently released 1.1.5 has the behavior you're looking for, but
> the patch is far too invasive to consider back-porting to 1.0.

Thanks Andrew,

Is there any possibility to move back manualy a part of the ClusterIP 
resource (for example ClusterIP:1) to the other node ? Or is it just 
impossible with this version ?

>>
>> crm_verify give me the following output :
>>
>> crm_verify[22555]: 2011/03/10_13:49:00 ERROR: clone_rsc_order_lh: Cannot
>> interleave clone ProxyIP and HttpProxyClone because they do not support the
>> same number of resources per node
>> crm_verify[22555]: 2011/03/10_13:49:00 ERROR: clone_rsc_order_lh: Cannot
>> interleave clone HttpProxyClone and ProxyIP because they do not support the
>> same number of resources per node
>>
>>
>> Many thanks,
>>
>> Regards,
>>
>> --
>> Charles KOPROWSKI
>>
>>
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>>
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>> Bugs:
>> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>>
>>


-- 
Charles KOPROWSKI
Administrateur Systèmes et Réseaux
Audaxis

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