Hello I hope this is the right channel for my question. I am using openstack-victoria (packstack) in CentOS 8 for a school assignment. I am trying to create an instance out of a qcow2 image I made, the image size is somewhere around 1.9GB (CentOS 7 - template). I made this image out of an volume that was 30GB.
After creating the instance it takes around 4-5min, then I get this error message in the openstack dashboard:
`Error: Failed to perform requested operation on instance "test", the instance has an error status: Please try again later [Error: Build of instance 2b5bf737-dbd3-4173-afd0-3cb95c7d236b aborted: Volume e87171f3-99bc-4ef1-bdcc-eed55461cd18 did not finish being created even after we waited 188 seconds or 61 attempts. And its status is downloading.].`
The /var/log/cinder/volume.log file contains:
`2021-03-26 15:11:35.972 3029 ERROR oslo_messaging.rpc.server cinder.exception.ImageCopyFailure: Failed to copy image to volume: qemu-img: error while writing at byte 20401094656: No space left on device`
This is strange because I have plenty of storage left

Controller/computenode
packstack.openstack.local:
```
Filesystem                  Size  Used Avail Use% Mounted on
devtmpfs                     12G     0   12G   0% /dev
tmpfs                        12G  4.0K   12G   1% /dev/shm
tmpfs                        12G  9.4M   12G   1% /run
tmpfs                        12G     0   12G   0% /sys/fs/cgroup
/dev/mapper/cl-root         162G   27G  135G  17% /
/dev/mapper/cl-home          30G  246M   30G   1% /home
/dev/loop0                  1.9G  6.1M  1.7G   1% /srv/node/swiftloopback
/dev/sda1                  1014M  254M  761M  25% /boot
tmpfs                       7.1G     0  7.1G   0% /run/user/0
```

NOTE: I am also running 1 compute node, I dont know if it matters but this is the df of that VM:

compute.openstack.local:
Compute Node
```
Filesystem                   Size  Used Avail Use% Mounted on
devtmpfs                     1.8G     0  1.8G   0% /dev
tmpfs                        1.9G     0  1.9G   0% /dev/shm
tmpfs                        1.9G  9.1M  1.9G   1% /run
tmpfs                        1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/mapper/cl_compute-root   17G  2.9G   15G  17% /
/dev/sda1                   1014M  254M  761M  25% /boot
tmpfs                        372M     0  372M   0% /run/user/0
```

I am trying to create the instance on the controller/compute node. Could it be that the qcow2 image I made is not right? I can create a instance from the cirros image without any problems, but I think it has to do with the size of the volume I am trying to make.