[ClusterLabs] Reusing resource set in multiple constraints

Andrei Borzenkov arvidjaar at gmail.com
Sat Aug 3 12:07:39 EDT 2019

29.07.2019 22:07, Ken Gaillot пишет:
> On Sat, 2019-07-27 at 11:04 +0300, Andrei Borzenkov wrote:
>> Is it possible to have single definition of resource set that is
>> later
>> references in order and location constraints? All syntax in
>> documentation or crmsh presumes inline set definition in location or
>> order statement.
>> In this particular case there will be set of filesystems that need to
>> be
>> colocated and ordered against other resources; these filesystems will
>> be
>> extended over time and I would like to add new definition in just one
>> place.
> Tags can do what you want:
> https://clusterlabs.org/pacemaker/doc/en-US/Pacemaker/2.0/html-single/Pacemaker_Explained/index.html#_tagging_configuration_elements

Thanks, it indeed appears to be exactly the right thing. It also allows
adding new resources first as standalone (so they do not cause chain
reaction if anything goes wrong) and integrating into application after
it was verified resource starts/stops properly.

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