[Pacemaker] Migrate resources based on connectivity

[Dejan Muhamedagic]

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.

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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