[ClusterLabs] pacemaker as data store

George Melikov mail at gmelikov.ru
Wed May 16 04:28:35 EDT 2018

Thank you, it works great on healthy cluster.

George Melikov,
Tel. 7-915-278-39-36
Skype: georgemelikov

С наилучшими пожеланиями,
Георгий Меликов,
mail at gmelikov.ru
Моб:         +7 9152783936
Skype:     georgemelikov

15.05.2018, 18:01, "Ken Gaillot" <kgaillot at redhat.com>:
> On Tue, 2018-05-15 at 13:25 +0300, George Melikov wrote:
>>  Hello,
>>  Sorry for a (likely) dumb question,
>>  but is there a way to store and sync data via pacemaker/corosync?
>>  Are there any way to store key/value properties or files?
>>  I've found `pcs property set --force`, but it didn't survive cluster
>>  restart.
> That's surprising, cluster properties (even unrecognized ones) should
> persist. After setting it, try double-checking that it was written to
> disk with pcs cluster cib | less. I would use some prefix (like the
> name of your organization) for all property names, to make conflicts
> with real properties less likely.
> Permanent node attributes are another possibility, though they record a
> separate value for each node. The values of any node, however, can be
> queried from any other node. That means you could just pick one node
> and set all your name/value pairs using its name.
> However, there's a reason not to use pacemaker for this purpose:
> changes to cluster properties or node attributes will trigger a new
> calculation of where resources should be. It won't cause any harm, but
> it will add CPU and I/O load unnecessarily. Similarly, if your data set
> is large, it will take longer to do such calculations, slowing down
> recovery unnecessarily.
> You could run etcd or some NoSQL database as a cluster resource, then
> keep your data there.
>>  ____________________________________
>>  Sincerely,
>>  George Melikov,
>>  Tel. 7-915-278-39-36
>>  Skype: georgemelikov
>>  С наилучшими пожеланиями,
>>  Георгий Меликов,
>>  mail at gmelikov.ru
>>  Моб:         +7 9152783936
>>  Skype:     georgemelikov
> --
> Ken Gaillot <kgaillot at redhat.com>
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