[Pacemaker] Resources move on Pacemaker + Corosync cluster with set stickiness

Danilo Malcangio d.malcangio at eletech.it
Tue May 27 10:23:32 UTC 2014 

I've removed the location constraint and it seems the resources don't 
move anymore if I reboot BX-1.
During reboot I noticed on crm_mon that resources for one second 
appeared offline and then they stayed on BX-2. Does anyone know why that 
happened?

I've tried reconfiguring my cluster following this official guide 
(http://clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html/Clusters_from_Scratch/index.html) 
5. Creating an Active/Passive Cluster
but I still get the same problem, at reboot nodes go back to the 
preferred node BX-1 that is exactly the contrary of what is stated in 
the guide.

Still wondering how the location constraint and stickiness work.

> Try crm_mon -o and look for monitor operations that return 0 instead of 7

I am sorry Andrew, I've tried to follow your advice but didn't quite 
catch what you want me to look for :(


Il 23/05/2014 2.42, Andrew Beekhof ha scritto:
> On 22 May 2014, at 9:00 pm, Danilo Malcangio <d.malcangio at eletech.it> wrote:
>
>> Hi Andrew, first of all thanks for answering.
>>
>>> Almost certainly the node is configured to start those resources at bootup.
>>> Don't do that :)
>>>
>> Are you advicing me to delete the location constraint? (location prefer-et-ipbx-1 cluster-group 100: BX-1)
>> Or is it something else that starts the resources on BX-1 Node??
> By the looks of it, yes.
> Try crm_mon -o and look for monitor operations that return 0 instead of 7
>
>> I've removed all the scripts from the startup sequence with "update-rc.d -f  SCRIPT_NAME remove"
>>
>> Thank you
>>
>> Il 22/05/2014 12.25, Andrew Beekhof ha scritto:
>>> On 22 May 2014, at 5:31 pm, Danilo Malcangio <d.malcangio at eletech.it>
>>>   wrote:
>>>
>>>
>>>> Hi everyone,
>>>> I've created an active/passive 2 node cluster following the documentation on clusterlabs.
>>>> My cluster has the following characteristics
>>>> Debian Wheezy 7.2.0
>>>> Pacemaker 1.1.7
>>>> Corosync 1.4.2
>>>>
>>>> I've made it with the following configuration
>>>>
>>>> node BX-1
>>>> node BX-2
>>>> primitive cluster-apache2 ocf:heartbeat:apache \
>>>>      params configfile="/etc/apache2/apache2.conf" httpd="/usr/sbin/apache2" port="80" \
>>>>      op monitor interval="10s" timeout="60s" \
>>>>      op start interval="0" timeout="40s" \
>>>>      op stop interval="0" timeout="60s"
>>>> primitive cluster-asterisk lsb:asterisk \
>>>>      op monitor interval="30" \
>>>>      op start interval="0" timeout="120s" \
>>>>      op stop interval="0" timeout="120s"
>>>> primitive cluster-ip ocf:heartbeat:IPaddr2 \
>>>>      params ip="10.2.30.10" cidr_netmask="20" \
>>>>      op monitor interval="10s" timeout="20s" \
>>>>      op start interval="0" timeout="20s" \
>>>>      op stop interval="0" timeout="20s"
>>>> primitive cluster-ntp lsb:ntp \
>>>>      op monitor interval="30" \
>>>>      op start interval="0" timeout="120s" \
>>>>      op stop interval="0" timeout="120s"
>>>> primitive cluster-tftp lsb:tftpd-hpa \
>>>>      op monitor interval="30" \
>>>>      op start interval="0" timeout="120s" \
>>>>      op stop interval="0" timeout="120s"
>>>> group cluster-group cluster-ip cluster-asterisk cluster-apache2 cluster-tftp cluster-ntp \
>>>>      meta resource-stickiness="101"
>>>> location prefer-et-ipbx-1 cluster-group 100: BX-1
>>>> colocation cluster-dependency inf: cluster-ip cluster-asterisk cluster-apache2 cluster-tftp cluster-ntp
>>>> property $id="cib-bootstrap-options" \
>>>>      dc-version="1.1.7-ee0730e13d124c3d58f00016c3376a1de5323cff" \
>>>>      cluster-infrastructure="openais" \
>>>>      expected-quorum-votes="2" \
>>>>      stonith-enabled="false" \
>>>>      no-quorum-policy="ignore" \
>>>>      default-resource-stickiness="1"
>>>> rsc_defaults $id="rsc-options" \
>>>>      failure-timeout="60s"
>>>>
>>>> I've set location constraint to have BX-1 as the preferred node at cluster startup, and group stickiness at 101 to avoid moving resources when the master node comes back up (following this guide
>>>> http://foaa.de/old-blog/2010/10/intro-to-pacemaker-part-2-advanced-topics/trackback/index.html
>>>> ).
>>>>
>>>> I've got the following problem: resources move when I reboot nodes.
>>>>
>>>> If i stop corosync on BX-1 resources move to BX-2 and when i restart corosync on BX-1 they stay on BX-2 (as I expected).
>>>> But all this doesn't happen with reboot (when I reboot BX-1).
>>>>
>>> Almost certainly the node is configured to start those resources at bootup.
>>> Don't do that :)
>>>
>>>
>>>> After the reboot of BX-1 resources move to BX-2 and when BX-1 comes back up the resources move back to BX-1.
>>>>
>>>> What am I missing in the configuration??
>>>>
>>>> Thank you very much for the support
>>>>
>>>>
>>>>
>>>> P.s. I attach also the allocation scores obtained with ptest -sL
>>>>
>>>> BX-1 has resources
>>>>
>>>> Allocation scores:
>>>> group_color: et-cluster allocation score on ET-IPBX-1: 100
>>>> group_color: et-cluster allocation score on ET-IPBX-2: 0
>>>> group_color: cluster-ip allocation score on ET-IPBX-1: 201
>>>> group_color: cluster-ip allocation score on ET-IPBX-2: 0
>>>> group_color: cluster-asterisk allocation score on ET-IPBX-1: 101
>>>> group_color: cluster-asterisk allocation score on ET-IPBX-2: 0
>>>> group_color: cluster-apache2 allocation score on ET-IPBX-1: 101
>>>> group_color: cluster-apache2 allocation score on ET-IPBX-2: 0
>>>> group_color: cluster-tftp allocation score on ET-IPBX-1: 101
>>>> group_color: cluster-tftp allocation score on ET-IPBX-2: 0
>>>> group_color: cluster-ntp allocation score on ET-IPBX-1: 101
>>>> group_color: cluster-ntp allocation score on ET-IPBX-2: 0
>>>> native_color: cluster-ip allocation score on ET-IPBX-1: 3231
>>>> native_color: cluster-ip allocation score on ET-IPBX-2: 0
>>>> native_color: cluster-asterisk allocation score on ET-IPBX-1: 1515
>>>> native_color: cluster-asterisk allocation score on ET-IPBX-2: -INFINITY
>>>> native_color: cluster-apache2 allocation score on ET-IPBX-1: 707
>>>> native_color: cluster-apache2 allocation score on ET-IPBX-2: -INFINITY
>>>> native_color: cluster-tftp allocation score on ET-IPBX-1: 303
>>>> native_color: cluster-tftp allocation score on ET-IPBX-2: -INFINITY
>>>> native_color: cluster-ntp allocation score on ET-IPBX-1: 101
>>>> native_color: cluster-ntp allocation score on ET-IPBX-2: -INFINITY
>>>>
>>>> BX-2 has resources (while BX-1 reboot)
>>>>
>>>> Allocation scores:
>>>> group_color: et-cluster allocation score on ET-IPBX-1: -INFINITY
>>>> group_color: et-cluster allocation score on ET-IPBX-2: 0
>>>> group_color: cluster-ip allocation score on ET-IPBX-1: -INFINITY
>>>> group_color: cluster-ip allocation score on ET-IPBX-2: 101
>>>> group_color: cluster-asterisk allocation score on ET-IPBX-1: 0
>>>> group_color: cluster-asterisk allocation score on ET-IPBX-2: 101
>>>> group_color: cluster-apache2 allocation score on ET-IPBX-1: 0
>>>> group_color: cluster-apache2 allocation score on ET-IPBX-2: 101
>>>> group_color: cluster-tftp allocation score on ET-IPBX-1: 0
>>>> group_color: cluster-tftp allocation score on ET-IPBX-2: 101
>>>> group_color: cluster-ntp allocation score on ET-IPBX-1: 0
>>>> group_color: cluster-ntp allocation score on ET-IPBX-2: 101
>>>> native_color: cluster-ip allocation score on ET-IPBX-1: -INFINITY
>>>> native_color: cluster-ip allocation score on ET-IPBX-2: 3131
>>>> native_color: cluster-asterisk allocation score on ET-IPBX-1: -INFINITY
>>>> native_color: cluster-asterisk allocation score on ET-IPBX-2: 1515
>>>> native_color: cluster-apache2 allocation score on ET-IPBX-1: -INFINITY
>>>> native_color: cluster-apache2 allocation score on ET-IPBX-2: 707
>>>> native_color: cluster-tftp allocation score on ET-IPBX-1: -INFINITY
>>>> native_color: cluster-tftp allocation score on ET-IPBX-2: 303
>>>> native_color: cluster-ntp allocation score on ET-IPBX-1: -INFINITY
>>>> native_color: cluster-ntp allocation score on ET-IPBX-2: 101
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>>>
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>>>
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>
>
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