On Tue, 21 May 2013, Ulrich Windl wrote:
>>>> Tony Stocker <[email protected]> schrieb am 21.05.2013 um 15:21 in
> Nachricht
> <alpine.lrh.2.03.1305211310530.10...@tf6102xuryqne.ccf.rbfqvf.anfn.tbi>:
>> 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))?
>
> Hi!
>
> Maybe that's my fault: "system health" is the term that you should look for
> ("info HealthSMART", "node-health-strategy").
> I don't think the crm can write corresponding rules without using XML.
>
> Regards,
> Ulrich
Okay, let me back up a bit. Maybe you can help me answer the following
questions which sort of underlie what I'm trying to do:
1. Can a location constraint apply to a resource group? Or must
it apply only to resource primitives?
2. Can a location constraint rule apply to a node parameter other
than #uname?
I've tried creating one using crmsh but it doesn't seem to be working as I
anticipate:
# crm configure show
node gpmhac01 \
attributes class="A" kernel="2.6.32-358.6.2.el6.x86_64"
node gpmhac06 \
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"
node gpmhac10 \
attributes class="B" kernel="2.6.32-358.6.2.el6.x86_64"
node gpmhac11 \
attributes class="B" kernel="2.6.32-358.6.2.el6.x86_64"
node gpmhac12 \
attributes class="B" kernel="2.6.32-358.6.2.el6.x86_64"
primitive HACMASTER-BAK-IP ocf:heartbeat:IPaddr2 \
params ip="192.168.1.179" \
op monitor interval="30s"
primitive HACMASTER-COMM-IP ocf:heartbeat:IPaddr2 \
params ip="10.8.1.1" \
op monitor interval="30s"
primitive HACMASTER-EXT-IP ocf:heartbeat:IPaddr2 \
params ip="186.106.183.10" \
op monitor interval="30s"
primitive HACMASTER-JAVA ocf:PPS:hacJavaLinks
primitive HACMASTER-JOBFILE ocf:PPS:hacJobFile \
params role="hac" job="hacmaster"
primitive HACMASTER-PWFILE ocf:PPS:hacPWFile \
params role="hac"
primitive HACMASTER-SSHKEYS ocf:PPS:hacSSHKeys
primitive HACMASTER-STOR-IP ocf:heartbeat:IPaddr2 \
params ip="10.8.3.1" \
op monitor interval="30s"
group HACMASTER HACMASTER-JOBFILE HACMASTER-PWFILE HACMASTER-JAVA
HACMASTER-SSHKEYS HACMASTER-EXT-IP HACMASTER-BAK-IP HACMASTER-COMM-IP
HACMASTER-STOR-IP \
meta target-role="Started"
location hacmaster_prefer_b HACMASTER \
rule $id="hacmaster_prefer_b-rule" 1000: #class eq B
property $id="cib-bootstrap-options" \
dc-version="1.1.8-7.el6-394e906" \
cluster-infrastructure="classic openais (with plugin)" \
expected-quorum-votes="6" \
stonith-enabled="false"
rsc_defaults $id="rsc-options" \
resource-stickiness="500"
# crm_mon -1r
Last updated: Tue May 21 14:15:51 2013
Last change: Tue May 21 14:04:44 2013 via cibadmin on gpmhac12
Stack: classic openais (with plugin)
Current DC: gpmhac10 - partition with quorum
Version: 1.1.8-7.el6-394e906
6 Nodes configured, 6 expected votes
8 Resources configured.
Online: [ gpmhac01 gpmhac06 gpmhac09 gpmhac10 gpmhac11 gpmhac12 ]
Full list of resources:
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 even though I have a location rule with a score of 1000 and
the default stickiness is 500, the resource group 'HACMASTER' continues to
reside on node 'gpmhac01' which is a node that has the node attribute
class='A'
This makes me think that a.) location constraints don't work on resource
groups, or b.) location constraints can't handle custom defined node
attributes, or c.) I'm not configuring something correctly.
Thanks,
Tony
>
>>>
>>> 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
>>>>
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