Can't create volume snapshots on microstack ussuri

[Yannick Barone]

Hi all,

I've install microstack ussuri on 2 different servers (1 physical & 1 virtual) and I get the same issue on the 2 servers :
I' am unable to create a volume.

When I triy, the volume is in error status with the message : "schedule allocate volume:Could not find any available weighted backend."

$ microstack.openstack service list
+----------------------------------+-----------+-----------+
| ID | Name | Type |
+----------------------------------+-----------+-----------+
| 541c63f2156841668f4b5b80b7fc1f53 | cinderv3 | volumev3 |
| 5a1f8c11546a43e4b12398b60bc446e9 | glance | image |
| 718feb502dea4ae5b919b13b9847d55a | keystone | identity |
| 75d4f37dd4044379abd23ff229aedd14 | neutron | network |
| c5f0a408e5514c4bb6edbdc19f7001fd | placement | placement |
| d0a8be96301a4f068dd69cdcdd80cd41 | cinderv2 | volumev2 |
| e3ef02a4148148f4920c60f8fb4af1e4 | nova | compute |
+----------------------------------+-----------+-----------+

Thanks.

Yannick

[Yannick Barone (yannickbarone)]

I've been able to have cinder-volume UP using :

# sudo microstack init --auto --control --setup-loop-based-cinder-lvm-backend

Unfortunately, now this is volume snapshots that are in status error.

[Yannick Barone (yannickbarone)]

Snapshots are working fine now.
Seems it needs a bit some time :

$ microstack.openstack volume list
+--------------------------------------+---------+-----------+------+-------------+
| ID | Name | Status | Size | Attached to |
+--------------------------------------+---------+-----------+------+-------------+
| 27a8515b-949c-47ed-9cdf-17cb9ee5d8dd | windisk | available | 100 | |
+--------------------------------------+---------+-----------+------+-------------+
$ microstack.openstack volume service list
+------------------+--------------------------------+------+---------+-------+----------------------------+
| Binary | Host | Zone | Status | State | Updated At |
+------------------+--------------------------------+------+---------+-------+----------------------------+
| cinder-scheduler | macmini | nova | enabled | up | 2021-02-07T12:26:08.000000 |
| cinder-backup | macmini | nova | enabled | up | 2021-02-07T12:26:10.000000 |
| cinder-volume | macmini@lvm-loop-based-backend | nova | enabled | up | 2021-02-07T12:26:17.000000 |
+------------------+--------------------------------+------+---------+-------+----------------------------+

$ microstack.openstack volume snapshot list
+--------------------------------------+----------------+-------------+-----------+------+
| ID | Name | Description | Status | Size |
+--------------------------------------+----------------+-------------+-----------+------+
| 30575734-e4b9-4a39-ac09-574845125b9c | test snapshots | | available | 100 |
+--------------------------------------+----------------+-------------+-----------+------+

[Keith Ellis (kellis5137)]

@Yannick I'm having the same problem. Are you saying you just had to wait and eventually the volume services came up? How long did you wait?

[Juan Otero (juanoterocas)]

 Hi, --setup-loop-based-cinder-lvm-backend worked at the beginning but now is throwing the same exception, I'm Using multinode approach and I cannot make snapshots.