Comment 0 for bug 1928669

**Bug Report**
What Happened:
I cannot get Glance to upload a .vhdx-file to cinder hosted on cinder-volume winsmb (CloudBase Cinder-Volume Service). See attached glance log file. Cinder works fine, as I can create new volumes, but cannot upload images through horizon. Though as horizon is able to upload fine, I assume this is related to Glance only.

My deployment consists of one all-in-one-node with following services enabled and running:
```
docker container list
NAMES
designate_sink
designate_worker
designate_mdns
designate_producer
designate_central
designate_api
designate_backend_bind9
horizon
neutron_metadata_agent
neutron_l3_agent
neutron_dhcp_agent
neutron_linuxbridge_agent
neutron_server
nova_novncproxy
nova_conductor
nova_api
nova_scheduler
placement_api
cinder_scheduler
cinder_api
glance_api
keystone
keystone_fernet
keystone_ssh
rabbitmq
memcached
mariadb_clustercheck
mariadb
cron
kolla_toolbox
fluentd
```

Cinder, Neutron and Nova are running on Windows Server 2019 servers for testing purposes, as I want to leverage my failover cluster and infrastructure for OpenStack. Before rolling this out I wanted to get verification that this works flawlessly, and I hit this issue here.

glance.conf: (stripped for relevant entries)
```
[DEFAULT]
enabled_backends = http:http, cinder:cinder
cinder_catalog_info = volume:cinder:internalURL

[glance_store]
default_backend = cinder
```

What I expect to happen:
Upload images from Horizon to Glance on Cinder-backend on CloudBase OpenStack Cinder-Volume 17.0 Victoria

Reproduce:
* Deploy 1-Node Controller-only (compute and storage-inventory empty)
* Deploy Windows Server 2019 with CloudBase OpenStack Windows Storage 17.0 Victoria, fill in all required fields (use SMB, not iSCSI)
* Upload single .VHDX-image through horizon into the Images-store. Ends up being queued forever, and fails with error, see attachment.

**Environment**
* OS: Ubuntu 20.04.2 LTS
* Kernel: Linux stack 5.4.0-73-generic #82-Ubuntu SMP Wed Apr 14 17:39:42 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
* Docker Version: 20.10.2-0ubuntu1~20.04.2
* Kolla Version: all (source, binary) builds of stable/wallaby and stable/victoria, both CentOS and Ubuntu don't work.
* Cinder Volume: CloudBase OpenStack Windows Storage 17.0 Victoria

I don't see this as a deployment-issue as privsep is supposed to be part of kolla images.

I'm happy to provide further details if necessary.