On Sep 30, 2010, at 2:35 AM, Sascha Reimann wrote:
> Hi Dejan,
>
> it's working fine with the amount of free ram as the score and a bigger
> default-resource-stickiness:
>
> primitive v01 ocf:heartbeat:Xen \
> params xmfile="/etc/xen/conf.d/v01.cfg" \
> op monitor interval="30s" timeout="30s" \
> op start interval="0" timeout="60s" \
> op stop interval="0" timeout="40s" allow-migrate="true" \
> meta target-role="Started"
> primitive v02 ocf:heartbeat:Xen \
> params xmfile="/etc/xen/conf.d/v02.cfg" \
> op monitor interval="30s" timeout="30s" \
> op start interval="0" timeout="60s" \
> op stop interval="0" timeout="40s" allow-migrate="true" \
> meta target-role="Started"
> primitive v03 ocf:heartbeat:Xen \
> params xmfile="/etc/xen/conf.d/v03.cfg" \
> op monitor interval="30s" timeout="30s" \
> op start interval="0" timeout="60s" \
> op stop interval="0" timeout="40s" allow-migrate="true" \
> meta target-role="Started"
> location RAM01-v01 v01 \
> rule $id="loc-resv01-rule" ram_free: ram_free gt 6000
> location RAM01-v02 v02 \
> rule $id="loc-resv02-rule" ram_free: ram_free gt 3000
> location RAM01-v03 v03 \
> rule $id="RAM01-v03-rule" ram_free: ram_free gt 1000
> property $id="cib-bootstrap-options" \
> dc-version="1.0.9-74392a28b7f31d7ddc86689598bd23114f58978b" \
> cluster-infrastructure="openais" \
> expected-quorum-votes="4" \
> stonith-enabled="false" \
> default-resource-stickiness="16000" \
> last-lrm-refresh="1285761587"
>
> thanks!
Hmm, correct me if I am wrong, but these rules won't migrate a VM anywhere
unless some dom0 has more then 16000 of ram, no?
I don't think this is what you wanted.
And on a related note, why are there two different SysInfo agents? Which one is
supported?
/usr/lib/ocf/resource.d/heartbeat/SysInfo
/usr/lib/ocf/resource.d/pacemaker/SysInfo
Thanks,
Vadym
>
> On 09/28/2010 12:18 PM, Dejan Muhamedagic wrote:
>> Hi,
>>
>> On Tue, Sep 28, 2010 at 11:00:18AM +0200, Sascha Reimann wrote:
>>> howdy!
>>>
>>> I'm trying to configure a resource (xen-domU) that could start on 2
>>> nodes (preferred on node server01):
>>>
>>> primitive v01 ocf:heartbeat:Xen \
>>> params xmfile="/etc/xen/conf.d/v01.cfg" allow-migrate="true"
>>> location loc-v01p v01 200: server01
>>> location loc-v01s v01 100: server02
>>>
>>> That's working fine so far, but I want to ensure that there's enough
>>> hardwareresources available on server01, so I've set up a modified
>>> SysInfo-RA to put the ram_total and ram_free values of xen (xm
>>> info|awk '/free_memory/ {print $3}') to the statusinformation of the
>>> CIB:
>>>
>>> server01:~$ cibadmin -Q -o status|grep status-server01-ram
>>> <nvpair id="status-server01-ram_total" name="ram_total" value="8191"/>
>>> <nvpair id="status-server01-ram_free" name="ram_free" value="2000"/>
>>>
>>> This is working fine, too. BUT:
>>>
>>> When I create a rule like the one below, the xen-domU keeps
>>> restarting (or moving to server02 where the same happens), which is
>>> correct since the SysInfo-RA updates the statusinformation to
>>> value="0" after a start and back to value="2000" after a stop in
>>> this example.
>>>
>>> location loc-resv01 v01 \
>>> rule $id="loc-resv01-rule" -inf: ram_free lt 2000
>>
>> An interesting issue :-)
>>
>> Well, you can introduce resource stickiness and use that to
>> outweigh the negative score coming from the lack of memory (use
>> something less than inf). You may also consider using the amount
>> of free memory as a score.
>>
>> HTH,
>>
>> Dejan
>>
>>> Can anybody help?
>>>
>>> _______________________________________________
>>> Pacemaker mailing list: Pacemaker@oss.clusterlabs.org
>>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>>
>>> Project Home: http://www.clusterlabs.org
>>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>>> Bugs:
>>> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>
>
> --
> Für weitere Fragen stehen wir Ihnen gerne zur Verfügung.
>
> Mit freundlichen Grüßen
>
> Sascha Reimann
>
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http://oss.clusterlabs.org/mailman/listinfo/pacemaker
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