[ClusterLabs] Make sure either 0 or all resources in a group are running

[Sam Gardner]

'on-fail=standby' works well, however, setting a failure-timeout appears
to automatically bring the node out of standby after it expires.

--
Sam Gardner
Trustwave | SMART SECURITY ON DEMAND







On 3/28/16, 3:31 PM, "Ken Gaillot" <kgaillot at redhat.com> wrote:

>On 03/28/2016 02:19 PM, Sam Gardner wrote:
>> Is there any way to modify the behavior of a resource group N of A, B,
>>and C so that either A, B, and C are running on the same node, or none
>>of them are?
>>
>> With Pacemaker 1.1.12 and Corosync 1.4.8, if a group N is defined via:
>> pcs resource group N A B C
>>
>> if resource C cannot run, A and B still do.
>>
>> --
>> Sam Gardner
>> Trustwave | SMART SECURITY ON DEMAND
>
>The problem with that model is that none of the resources can be placed
>or started, because each depends on the others being placed and started
>already.
>
>I can think of two similar alternatives, though they would only work for
>failures, not for any other reasons C might be stopped:
>
>* Use on-fail=standby, so that if any resource fails, all resources are
>forced off that node. The node must be manually taken out of standby to
>be used again.
>
>* Use rules to say that A cannot run on any node where fail-count-B gt 0
>or fail-count-C gt 0, and B cannot run on any node where fail-count C gt
>0. (The group should handle the rest of the dependencies.)
>
>
>_______________________________________________
>Users mailing list: Users at clusterlabs.org
>http://scanmail.trustwave.com/?c=4062&d=oJX51sQWSGT59IqY1PSn5CA3HNnKYhWEdx
>7Y26jDOQ&s=5&u=http%3a%2f%2fclusterlabs%2eorg%2fmailman%2flistinfo%2fusers
>
>Project Home:
>http://scanmail.trustwave.com/?c=4062&d=oJX51sQWSGT59IqY1PSn5CA3HNnKYhWEdx
>za2ajHbQ&s=5&u=http%3a%2f%2fwww%2eclusterlabs%2eorg
>Getting started:
>http://scanmail.trustwave.com/?c=4062&d=oJX51sQWSGT59IqY1PSn5CA3HNnKYhWEdx
>-P0PTEOA&s=5&u=http%3a%2f%2fwww%2eclusterlabs%2eorg%2fdoc%2fCluster%5ffrom
>%5fScratch%2epdf
>Bugs:
>http://scanmail.trustwave.com/?c=4062&d=oJX51sQWSGT59IqY1PSn5CA3HNnKYhWEdx
>3f3qDDbA&s=5&u=http%3a%2f%2fbugs%2eclusterlabs%2eorg


________________________________

This transmission may contain information that is privileged, confidential, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is strictly prohibited. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format.