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Bug
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Resolution: Won't Do
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Normal
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None
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rhos-16.2.z
Description of problem:
Currently when uploading a cinder volume to a glance image in qcow2 format,
size of the newly created glance image is computed as size of the actual qcow2 file
instead of original volume size.
For example if we create an empty 1GiB volume
~~~
(overcloud) [stack@undercloud-0 ~]$ openstack volume create sourcevolume --size 2
...
(overcloud) [stack@undercloud-0 ~]$ openstack volume show sourcevolume
---------------------------------------------------------------------+
| Field | Value |
---------------------------------------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| consistencygroup_id | None |
| created_at | 2021-07-21T07:47:18.000000 |
| description | None |
| encrypted | False |
| id | cb2113ce-2768-412c-81c2-190bdd7e7b2c |
| migration_status | None |
| multiattach | False |
| name | sourcevolume |
| os-vol-host-attr:host | hostgroup@tripleo_iscsi#tripleo_iscsi |
| os-vol-mig-status-attr:migstat | None |
| os-vol-mig-status-attr:name_id | None |
| os-vol-tenant-attr:tenant_id | 942783ae248c4e9eb353a6e6b327bda5 |
| properties | |
| replication_status | None |
| size | 2 |
| snapshot_id | None |
| source_volid | None |
| status | available |
| type | tripleo |
| updated_at | 2021-07-21T07:47:19.000000 |
| user_id | 06b547a0af8f49fd8239c85ce5d9571b |
---------------------------------------------------------------------+
~~~
... and then create a qcow2 image from the volume
~~~
(overcloud) [stack@undercloud-0 ~]$ openstack image create --volume sourcevolume --disk-format qcow2 testimage
...
~~~
... then the image gets 197120 Bi which is the actual size of qcow2 file.
~~~
(overcloud) [stack@undercloud-0 ~]$ openstack image show testimage
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Field | Value |
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| checksum | dc9ef2e7cf57a420ef03a408178a4076 |
| container_format | bare |
| created_at | 2021-07-21T07:48:24Z |
| disk_format | qcow2 |
| file | /v2/images/e1272ef7-f39b-460e-a529-89f5eb0c8e14/file |
| id | e1272ef7-f39b-460e-a529-89f5eb0c8e14 |
| min_disk | 0 |
| min_ram | 0 |
| name | testimage |
| owner | 942783ae248c4e9eb353a6e6b327bda5 |
| properties | direct_url='swift+config://ref1/glance/e1272ef7-f39b-460e-a529-89f5eb0c8e14', os_hash_algo='sha512', os_hash_value='fe600797d0cc7e4a2a598841b129709a327981a52e7de3a1b13dc09427c53136ca42df9bb174b79984f829c1ba8e8ee64891de542194cd9243d149c6593680db', os_hidden='False', stores='default_backend' |
| protected | False |
| schema | /v2/schemas/image |
| size | 197120 |
| status | active |
| tags | |
| updated_at | 2021-07-21T07:48:28Z |
| virtual_size | None |
| visibility | shared |
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
~~~
If we try to create a 1GB volume form that image, the request is accpeted but
the volume eventually becomes error status.
~~~
(overcloud) [stack@undercloud-0 ~]$ openstack volume create smallervolume --image testimage --size 1
...
(overcloud) [stack@undercloud-0 ~]$ openstack volume show smallervolume
---------------------------------------------------------------------+
| Field | Value |
---------------------------------------------------------------------+
| attachments | [] |
| availability_zone | nova |
| bootable | false |
| consistencygroup_id | None |
| created_at | 2021-07-21T07:52:37.000000 |
| description | None |
| encrypted | False |
| id | a72f04f5-0351-4a3a-856d-2d7a9586a4fc |
| migration_status | None |
| multiattach | False |
| name | smallervolume |
| os-vol-host-attr:host | hostgroup@tripleo_iscsi#tripleo_iscsi |
| os-vol-mig-status-attr:migstat | None |
| os-vol-mig-status-attr:name_id | None |
| os-vol-tenant-attr:tenant_id | 942783ae248c4e9eb353a6e6b327bda5 |
| properties | |
| replication_status | None |
| size | 1 |
| snapshot_id | None |
| source_volid | None |
| status | error |
| type | tripleo |
| updated_at | 2021-07-21T07:52:39.000000 |
| user_id | 06b547a0af8f49fd8239c85ce5d9571b |
| volume_image_metadata | {'signature_verified': 'False'} |
---------------------------------------------------------------------+
~~~
It is because that virtual size of the image(2GB) doesn't fit in a volume size(1GB),
but this error is not exposed to users.
This makes it difficult to let users know actual cause of the error.
~~~
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server [req-30713ed0-564d-4f28-8035-252b63e697a5 06b547a0af8f49fd8239c85ce5d9571b 942783ae248c4e9eb353a6e6b327bda5 - default default] Exception during message handling: cinder.exception.
ImageUnacceptable: Image e1272ef7-f39b-460e-a529-89f5eb0c8e14 is unacceptable: Image virtual size is 2GB and doesn't fit in a volume of size 1GB.
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/oslo_messaging/rpc/server.py", line 165, in _process_incoming
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server res = self.dispatcher.dispatch(message)
...
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/cinder/volume/flows/manager/create_volume.py", line 1035, in _create_from_image
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server image_service)
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/cinder/volume/flows/manager/create_volume.py", line 915, in _create_from_image_cache_or_download
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server data.virtual_size, volume.size, image_id)
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server File "/usr/lib/python3.6/site-packages/cinder/image/image_utils.py", line 742, in check_virtual_size
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server reason=reason)
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server cinder.exception.ImageUnacceptable: Image e1272ef7-f39b-460e-a529-89f5eb0c8e14 is unacceptable: Image virtual size is 2GB and doesn't fit in a volume of size 1GB.
2021-07-21 07:52:39.678 74 ERROR oslo_messaging.rpc.server
~~~
Version-Release number of selected component (if applicable):
How reproducible:
Always
Steps to Reproduce:
1. Create a 2GB empty volume
2. Create qcow2 image from the 2GB volume
3. Create a 1GB volume from the image
Actual results:
Request to create a 1GB volume is accepted but the volume becomes error status
Expected results:
Request to create a 1GB volume is rejected according to image virtual size.
Additional info:
- external trackers
