Open Stack

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 at 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 at 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 at 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.

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