[ClusterLabs] Antw: Re: Q: Configure date_expression rule with crm shell without using XML

[Ulrich Windl]

>>> Kristoffer Grönlund <kgronlund at suse.de> schrieb am 04.09.2018 um 16:17 in
Nachricht <1536070650.9365.15.camel at suse.de>:
> On Tue, 2018‑09‑04 at 16:00 +0200,  Ulrich Windl  wrote:
>> Hi!
>> 
>> I have a question: Can I use crm shell to configure time‑based
>> meta_attributes without using XML?
>> I tried to configure it using XML, but since then the resource
>> configuration can be displayed as XML only.
>> What I'm trying to do is to configure resource‑specific stickiness
>> based on time only, wanting to set stickiness to 0 in the evening
>> hours to allow re‑balancing resources.
>> 
> 
> It should be possible to do this via rule expressions in crm shell, but
> not all XML that possible is expressible via crm shell syntax.
> 
> If you can show me the XML for the resource which doesn't render in crm
> shell I could probably be more specific.
> 
> http://crmsh.github.io/man/#topics_Syntax_RuleExpressions 

Hi Christoffer,

crmsh is so incredibly cool: I could add my changes like the following
(snipplet) withpout having to deal with XML (as presented in clusterlabs'
example "Change resource-stickiness during working hours"):

        meta 1: resource-stickiness=0 \
        meta 2: rule date spec hours=7-18 weekdays=1-5
resource-stickiness=1000

and that translates to

        <meta_attributes score="1" id="prm-meta_attributes">
          <nvpair name="resource-stickiness" value="0"
id="prm-meta_attributes-resource-stickiness"/>
        </meta_attributes>
        <meta_attributes score="2" id="prm-meta_attributes-0">
          <rule score="INFINITY" id="prm-meta_attributes-0-rule">
            <date_expression operation="date_spec"
id="prm-meta_attributes-0-rule-expression">
              <date_spec hours="7-18" weekdays="1-5"
id="prm-meta_attributes-0-rule-expression-date_spec"/>
            </date_expression>
          </rule>
          <nvpair name="resource-stickiness" value="1000"
id="prm-meta_attributes-0-resource-stickiness"/>
        </meta_attributes>

Now if "show changed" could display the changes in "diff -u" or wdiff format,
it would even be cooler. Maybe create another command like "show changes" or
"show diff[erences]"... ;-)

Regards,
Ulrich

> 
>> Regards,
>> Ulrich
>> 
>> 
>> 
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> ‑‑ 
> 
> Cheers,
> Kristoffer
> 
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