[ClusterLabs] Antw: [EXT] Re: Serialize and symmetrical=true does not work together

[Ulrich Windl]

>>> Ken Gaillot <kgaillot at redhat.com> schrieb am 17.03.2020 um 00:58 in
Nachricht
<1227_1584403147_5E7012CB_1227_2106_1_3a13cd73f8738e6967d6b1c399e994a1155495c3.c
mel at redhat.com>:
> It has always been the case that symmetrical=true was ignored (with a
> warning) for serialized constraints; the only recent change was making
> false the default so the warning wouldn't be displayed.
> 
> If you want the services to start and stop in a particular order, you
> don't want a serialized constraint, just a regular order constraint. A
> serialized constraint merely says that the actions can't be done at the
> same time, either one may be done first.
> 
> If you have a serialized constraint saying the resources can't start at
> the same time, and want that to apply to stops as well, then you can
> create a second serialized constraint explicitly specifying stop as the
> action to be ordered.

Maybe a simple, but realistic example would help to understand.

> 
> On Mon, 2020‑03‑16 at 19:41 +0530, Dileep V Nair wrote:
>> Hi,
>> 
>> I have pacemaker clusters which were working fine with Serialize and
>> symmetrical=true together. After an upgrade, I see that Serialize
>> does not work with symmetrical=true. How do I make sure the resources
>> in Serialize stop in reverse order of start ? All the clusters are
>> already in production. Please help.
>> 
>> Thanks & Regards
>> 
>> Dileep Nair
>> Squad Lead ‑ SAP Base 
>> Togaf Certified Enterprise Architect
>> IBM Services for Managed Applications
>> +91 98450 22258 Mobile
>> dilenair at in.ibm.com 
>> 
>> IBM Services
>> 
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> ‑‑ 
> Ken Gaillot <kgaillot at redhat.com>
> 
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