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 | -               |
+------------------+----------------+------+---------+-------+----------------------------+-----------------+

 

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)
 

 

those settings works fine on O and P version, so any doc / suggestion on how to configure A/A cinder volume on S version?