Change Default Volume Type for Block Storage

Problem

How to set a default volume type in PCD per project.

• A request to delete the currently configured default_volume_type type will fail. (Manual volume-type deletion is possible, but won't work if the value is set as a configuration option.)
• If the default_volume_type_ is misconfigured with the value referring to a non-existent volume-type, requests that rely on the default volume-type (a volume-create request without specifying the volume-type) will result in a HTTP 500 response.

Environment

• Private Cloud Director Virtualization - v2025.4 and Higher
• Private Cloud Director Kubernetes – v2025.4 and Higher
• Self-Hosted Private Cloud Director Virtualization - v2025.4 and Higher
• Self-Hosted Private Cloud Director Kubernetes - v2025.4 and Higher
• Component - Block Storage

Cause

• The default_volume_type configuration option is required to have a value. The default value is __DEFAULT__.
• There must always be at least one volume-type defined in a Cinder installation. The type-delete call enforces this.

Procedure

1. Use the below cinder commands to set, unset or list the default volume type per project.

# To set default volume type per project 

$ cinder default-type-set <PROJECT_UUID> <TYPE_NAME>

​

# To unset default volume type per project 

$ cinder default-type-unset <PROJECT_UUID>

​

# To list default volume type per project 

$ cinder default-type-list [--project <PROJECT_UUID>]

2. To set a default volume type in cinder.conf .

• Edit the file/opt/pf9/etc/pf9-cindervolume-base/conf.d/cinder.conf to add the below in the[DEFAULT] section:

$ vim /opt/pf9/etc/pf9-cindervolume-base/conf.d/cinder.conf

[DEFAULT]

#Add below to existing values

default_volume_type = <VOLUME_TYPE_NAME>

3. Restart Block Storage (cinder) service on the host

$ systemctl restart pf9-cindervolume-base

Validation

Create a new volume in the project without specifying the volume type, and the new volume should be created in the default volume configured at project level. Verify the same using below:

$ openstack volume show <VOLUME_UUID> -c type