openstack server create has the following flag to specify the volume creation during server creation which takes volume_type as a argument:

--block-device

Create a block device on the server.

Either a path to a JSON file or a CSV-serialized string describing the block device mapping.

The following keys are accepted for both:

uuid=<uuid>: UUID of the volume, snapshot or ID (required if using source image, snapshot or volume),

source_type=<source_type>: source type (one of: image, snapshot, volume, blank),

destination_type=<destination_type>: destination type (one of: volume, local) (optional),

disk_bus=<disk_bus>: device bus (one of: uml, lxc, virtio, ...) (optional),

device_type=<device_type>: device type (one of: disk, cdrom, etc. (optional),

device_name=<device_name>: name of the device (optional),

volume_size=<volume_size>: size of the block device in MiB (for swap) or GiB (for everything else) (optional),

guest_format=<guest_format>: format of device (optional),

boot_index=<boot_index>: index of disk used to order boot disk (required for volume-backed instances),

delete_on_termination=<true|false>: whether to delete the volume upon deletion of server (optional),

tag=<tag>: device metadata tag (optional),

volume_type=<volume_type>: type of volume to create (name or ID) when source if blank, image or snapshot and dest is volume (optional)

From: garcetto <garcetto@gmail.com>
Sent: 29 January 2024 15:36
To: OpenStack Discuss <openstack-discuss@lists.openstack.org>
Subject: [cinder][nova] server create boot volume choosing

CAUTION: This email originates from outside THG

good afternoon,

i have multiple backend types, so also different volumes types; is there an option on "openstack server create" to also specify the volume type on instance creation time?

thank you.