Unable to create or migrate a VPS to particular Compute Resource in SolusIO: Storage in enabled state of type fb with disk size 1 GB was not found

Symptoms 

Unable to create or migrate a VPS on particular Compute Resource in SolusIO:

SVM_ERROR: Storage in enabled state of type fb with disk size 1 GB was not found

Cause

The disk space stuck in 'reserved' state in SolusIO database:

# select * from storages where id=8;
id | path                     | created_at          | updated_at          | thin_pool | is_available_for_balancing | free_space | mount | credentials | name | reserved_space | type
----+-------------------------+---------------------+---------------------+-----------+----------------------------+--------------+-------+-------------+------+----------------+------
8  | /var/lib/libvirt/images/ | 2021-10-03 23:39:04 | 2021-11-01 01:36:47 |           | t                          | 1086.76    |     / |             |      | 1524.00        | fb

Resolution

Warning: there should not be active migration processes in SolusIO

1. Connect to SolusIO Management node via SSH
2. Backup SolusIO database
3. Access SolusIO database
4. Release reserved space:

   MYSQL_LIN: UPDATE storages SET reserved_space=0 where id=<ID>;

   Replace <ID> with the corresponding storage ID. Storage ID can be found at SolusIO > Compute Resources > Compute Resource > Storage(ID column)