[Pacemaker] Migrate resources based on connectivity

[Dan Frincu]

Hi,

Dejan Muhamedagic wrote:
> Hi,
>
> On Sun, Oct 10, 2010 at 10:27:13PM +0300, Dan Frincu wrote:
>   
>> Hi,
>>
>> I have the following setup:
>> - order drbd0:promote drbd1:promote
>> - order drbd1:promote drbd2:promote
>> - order drbd2:promote all:start
>> - collocation all drbd2:Master
>> - all is a group of resources, drbd{0..3} are drbd ms resources.
>>
>> I want to migrate the resources based on ping connectivity to a
>> default gateway. Based on http://www.clusterlabs.org/wiki/Pingd_with_resources_on_different_networks
>> and http://www.clusterlabs.org/wiki/Example_configurations I've
>> tried the following:
>> - primitive ping ocf:pacemaker:ping params host_list=1.2.3.4
>> multiplier=100 op monitor interval=5s timeout=5s
>> - clone ping_clone ping meta globally-unique=false
>> - location ping_nok all \
>>    rule $id="ping_nok-rule" -inf: not_defined ping_clone or
>> ping_clone number:lte 0
>>     
>
> Use pingd to reference the attribute in the location constraint.
>   
Not to be disrespectful, but after 3 days being stuck on this issue, I 
don't exactly understand how to do that. Could you please provide an 
example.

Thank you in advance.

Regards,

Dan
> Thanks,
>
> Dejan
>
>   
>> I've also tried ping instead of ping_clone with the same result,
>> regardless of the node where ping is prohibited, the "all" group
>> gets negative infinite metrics and "cannot run anywhere".
>>
>> Also based on the "crm configure help location" output, I've tried:
>> - location ping_nok all \
>>    rule $id="ping_nok-rule" -inf: ping_clone number:lte 0 and #uname
>> string:eq hostname
>>
>> At this one, nothing happens to the group when ping is prohibited.
>> So far, no luck. I'm using:
>>
>> # rpm -qa | grep -i "(openais|cluster|heartbeat|pacemaker|resource)"
>> cluster-glue-1.0.6-1.6.el5
>> pacemaker-libs-1.0.9.1-1.el5
>> pacemaker-1.0.9.1-1.el5
>> heartbeat-libs-3.0.3-2.el5
>> heartbeat-3.0.3-2.el5
>> openaislib-1.1.3-1.6.el5
>> resource-agents-1.0.3-2.el5
>> cluster-glue-libs-1.0.6-1.6.el5
>> openais-1.1.3-1.6.el5
>>
>> My goal is to move all the resources, drbd's and group from one node
>> to the other if the gateway is unreachable via ping. I can say that
>> the ocf:pacemaker:ping RA works (I've read some complaints about the
>> pingd RA in the mailing lists), if this was just a group of
>> resources, without the ordering and collocation constraints, it
>> would have worked, however I need to specify these as well.
>>
>> Any help would be appreciated, it's been a long weekend and I still
>> haven't figured it out. I hope it's not a bug ...
>>
>> Best regards,
>>
>> Dan
>>
>> -- 
>> Dan FRINCU
>> Systems Engineer
>> CCNA, RHCE
>> Streamwide Romania
>>
>>     
>
>   
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>>
>> Project Home: http://www.clusterlabs.org
>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>> Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>>     
>
>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>   

-- 
Dan FRINCU
Systems Engineer
CCNA, RHCE
Streamwide Romania

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