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.