[openstack-dev][cinder] question on cinder-volume A/A configuration
On 2019/09/19 7:17 PM, Chen CH Ji wrote:
compute node1 and node 2 both use this backend and I can see only 1 compute services
It's not quite clear to me what you mean by "backend" for compute nodes 1 and 2. But see my guess below.
[root@controller ~]# cinder service-list +------------------+----------------+------+---------+-------+----------------------------+-----------------+ | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason | +------------------+----------------+------+---------+-------+----------------------------+-----------------+ | cinder-scheduler | controller | nova | enabled | up | 2019-09-19T09:16:21.000000 | - | | cinder-volume | FC@POWERMAX_FC | nova | enabled | up | 2019-09-19T09:16:30.000000 | - | +------------------+----------------+------+---------+-------+----------------------------+-----------------+
You say that you can see only one compute service, but here you are listing Cinder services, not Nova services.
and now I am creating 5 instances from nova at same time (boot from volume) , the scheduler will report those error time to time like following ,but actually the 2 services on both 2 compute nodes runs fine ..
I guess that you are running cinder-volume on both compute nodes, and your problem is that only one of the cinder-volume services is up. Is that correct?
If I am guessing correctly, one of the two cinder-volume services is unable to reach cinder-api or is not running fine or not running at all. As a result, cinder-api is not aware of it and doesn't list it.
2019-09-19 17:53:10.951 20916 WARNING cinder.scheduler.host_manager [req-19e722e8-1523-4121-8987-3cb450a8038e 071294a19fa8463788822565e0927fce f43175c07dc8415899d6b350dbede772 - default default] volume service is down. (host: FC@POWERMAX_FC)
Where do you see this warning message? It looks like this particular service is not running fine.
If my guess is correct, I would expect to see additional information in the log of the problematic cinder-volume service.
Bernd.
On Thu, Sep 19, 2019 at 12:19 PM Chen CH Ji jichenjc@cn.ibm.com wrote:
Hi stackers I have a 1 controller + 2 compute nodes settings, same configuration works fine on Ocata version but failed to run on Stein version , I am using
compute node1 and node 2 both use this backend and I can see only 1 compute services
[root@controller ~]# cinder service-list
+------------------+----------------+------+---------+-------+----------------------------+-----------------+ | Binary | Host | Zone | Status | State | Updated_at | Disabled Reason |
+------------------+----------------+------+---------+-------+----------------------------+-----------------+ | cinder-scheduler | controller | nova | enabled | up | 2019-09-19T09:16:21.000000 | - | | cinder-volume | FC@POWERMAX_FC | nova | enabled | up | 2019-09-19T09:16:30.000000 | - |
+------------------+----------------+------+---------+-------+----------------------------+-----------------+
Hi,
The subject mentions cinder-volume A/A, but then you say you only have 1 controller node and there's only 1 scheduler and API service, so how is it running as A/A?
cinder.conf
[backend] backend_host=FC@POWERMAX_FC
and now I am creating 5 instances from nova at same time (boot from volume) , the scheduler will report those error time to time like following ,but actually the 2 services on both 2 compute nodes runs fine ..
2019-09-19 17:53:10.951 20916 WARNING cinder.scheduler.host_manager [req-19e722e8-1523-4121-8987-3cb450a8038e 071294a19fa8463788822565e0927fce f43175c07dc8415899d6b350dbede772 - default default] volume service is down. (host: FC@POWERMAX_FC)
You should check the cinder-volume logs to see the frequency of the stats reports, since slow stats reports will make the scheduler think the nodes are down.
If you had multiple controller nodes it could be out of sync clocks.
Cheers, Gorka.
those settings works fine on O and P version, so any doc / suggestion on how to configure A/A cinder volume on S version?
Ji Chen z Infrastructure as a Service architect Phone: 10-82451493 E-mail: jichenjc@cn.ibm.com
participants (3)
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Bernd Bausch
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Chen CH Ji
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Gorka Eguileor Gimeno