On Tue, 21 May 2013, Ulrich Windl wrote:
> Hi!
>
> I don't know what you are trying to do, but could "node coloring" do what you
> want (run resources on nodes with a specific color (red/green/yellow))?
>
> Regards,
> Ulrich
I can't find any references to "node coloring" in the documentation that I
have, or through a quick search online so I don't know if that applies to
my situation.
What I am trying to do is to have a resource group prefer to run on a
specific class of node over other classes of nodes by using a special node
attribute that I define for each node. I want to do this so that I can
avoid setting a location constraint score for each individual node, and
instead provide a location constraint score for each 'class' of nodes -
based on the node attribute value. But I do NOT want the resource group
excluded from running on other classes of nodes, I just want it to prefer
a specific class.
I **think** what I need would look like this in XML, based on Example 8.9
from the document previously mentioned in my original post:
<rsc_location id="hacmaster-prefers-b" rsc="HACMASTER">
<rule id="prefer-b-rule" score="1000">
<expression id="prefer-b-expr" attribute="#class"
operation="eq" value="B"/>
</rule>
</rsc_location>
However since we are frequently and repeatedly admonished to NOT directly
edit XML code - and I honestly do NOT want to edit XML code - but rather
to use the tools provided (i.e. crm, pcs, etc.) I am looking for the
syntax for setting such a rule using crm. Assuming to begin with, of
course, that such a rule is possible in the first place.
Thanks!
Tony
>
>>>> Tony Stocker <[email protected]> schrieb am 21.05.2013 um 14:25 in
> Nachricht
> <alpine.lrh.2.03.1305211212370.10...@tf6102xuryqne.ccf.rbfqvf.anfn.tbi>:
>
>> Version Info:
>> OS: CentOS 6.4
>> Kernel (current): 2.6.32-358.6.2.el6.x86_64
>> Pacemaker: 1.1.8-7.el6
>> Corosync: 1.4.1-15.el6_4
>> CRMSH: 1.2.5-55.4
>>
>> I'm using a number of documents from clusterlabs.org, specific to this
>> question I'm using "Pacemaker-1.1-Pacemaker_Explained-en-US.pdf" and I'm
>> in Chapter 8, section 8.4 regarding the use of node parameters to control
>> resource location. This particular document appears to rely almost solely
>> on XML snippets for its examples, and in this case these snippets are the
>> only examples. In an online archive of the mailing list for Pacemaker I
>> found a similar question from Jan 11, 2010 where the questioner was
>> referred to:
>> "Or read the crm_cli doc at clusterlabs.org.
>> Thanks,
>> Dejan "
>>
>> However the document referred to, "crm_cli doc", no longer appears to be
>> hosted on clusterlabs.org. Does anyone know of its new location? Or the
>> location of a similar document which will explain the correct syntax for
>> using 'crm' to configure a rule?
>>
>> I have defined a node parameter called "class", and I want to have a rule
>> which provides a score based on the class value (which is either 'A' or
>> 'B' at the moment, but could increase to other values at a later date.)
>> For example here is a snippet from 'crm configure show' of two nodes in
>> the cluster:
>>
>> node gpmhac01 \
>> attributes class="A" kernel="2.6.32-358.6.2.el6.x86_64"
>> node gpmhac09 \
>> attributes class="B" kernel="2.6.32-358.6.2.el6.x86_64"
>>
>> I have a defined group called 'HACMASTER':
>>
>> Resource Group: HACMASTER
>> HACMASTER-JOBFILE (ocf::PPS:hacJobFile): Started gpmhac01
>> HACMASTER-PWFILE (ocf::PPS:hacPWFile): Started gpmhac01
>> HACMASTER-JAVA (ocf::PPS:hacJavaLinks): Started gpmhac01
>> HACMASTER-SSHKEYS (ocf::PPS:hacSSHKeys): Started gpmhac01
>> HACMASTER-EXT-IP (ocf::heartbeat:IPaddr2): Started gpmhac01
>> HACMASTER-BAK-IP (ocf::heartbeat:IPaddr2): Started gpmhac01
>> HACMASTER-COMM-IP (ocf::heartbeat:IPaddr2): Started gpmhac01
>> HACMASTER-STOR-IP (ocf::heartbeat:IPaddr2): Started gpmhac01
>>
>> As you can see it got started on 'gpmhac01', which from the snippet above
>> this has a node class of 'A'. I would like to write a location constraint
>> rule which basically gives a significantly higher score if the node class
>> is 'B'. I do not want to prohibit the resource group from running on a
>> class 'A' system, but I want it to run on a class 'B' if at all possible.
>>
>> Can someone either point me to a document which more fully explains the
>> syntax, and hopefully provides examples, of the crm shell for the use of
>> things beyond simple configuration of primitives, to include configuration
>> examples of rules? Or at the very least can someone give me an example of
>> a crm configure rule configuration for a node parameter OTHER THAN then
>> node name? I have twelve (12) nodes in this cluster, six are class 'A'
>> and six are class 'B', I don't want to have to write twelve location
>> constraints for the same resource group if I can simply use a node
>> parameter to do the same thing -- which I think I should be able to do.
>>
>> Thanks very much,
>>
>> Tony
>>
>> --
>> This message has been scanned for viruses and
>> dangerous content by MailScanner, and is
>> believed to be clean.
>>
>> _______________________________________________
>> Linux-HA mailing list
>> [email protected]
>> http://lists.linux-ha.org/mailman/listinfo/linux-ha
>> See also: http://linux-ha.org/ReportingProblems
>
>
> _______________________________________________
> Linux-HA mailing list
> [email protected]
> http://lists.linux-ha.org/mailman/listinfo/linux-ha
> See also: http://linux-ha.org/ReportingProblems
>
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
_______________________________________________
Linux-HA mailing list
[email protected]
http://lists.linux-ha.org/mailman/listinfo/linux-ha
See also: http://linux-ha.org/ReportingProblems
