cinder的api.log中发现如下错误：
2016-09-20 12:01:50.410 21508 ERROR cinder.api.middleware.fault [req-8a22425c-064b-4c50-9203-00f3760ba4d4 cd3c4133acc94226b4b2d868fd6a1e19 ea60e55e114a41d3b9d86d298c07bc99 - - -] Caught error: Could not determine a suitable URL for the plugin
2016-09-20 12:01:50.411 21508 INFO cinder.api.middleware.fault [req-8a22425c-064b-4c50-9203-00f3760ba4d4 cd3c4133acc94226b4b2d868fd6a1e19 ea60e55e114a41d3b9d86d298c07bc99 - - -] https://10.167.14.164:8776/v2/ea60e55e114a41d3b9d86d298c07bc99/os-quota-sets/ea60e55e114a41d3b9d86d298c07bc99?usage=False returned with HTTP 500
2016-09-20 12:01:50.412 21508 INFO eventlet.wsgi.server [req-8a22425c-064b-4c50-9203-00f3760ba4d4 cd3c4133acc94226b4b2d868fd6a1e19 ea60e55e114a41d3b9d86d298c07bc99 - - -] 10.167.14.164 - - [20/Sep/2016 12:01:50] "GET /v2/ea60e55e114a41d3b9d86d298c07bc99/os-quota-sets/ea60e55e114a41d3b9d86d298c07bc99?usage=False HTTP/1.1" 500 425 0.095734经调查发现是openstack的bug，修复如下：