Provide volume name, when create volume from image and boot instance

[Ritesh Paiboina]

To create a bootable volume from an image and launch an instance from this volume, we uses the --block-device parameter.

For example:

$ nova boot --flavor FLAVOR --block-device
source=SOURCE,id=ID,dest=DEST,size=SIZE,shutdown=PRESERVE,bootindex=INDEX
NAME

The parameters are:

    --flavor FLAVOR. The flavor ID or name.

    --block-device source=SOURCE,id=ID,dest=DEST,size=SIZE,shutdown=PRESERVE,bootindex=INDEX

When you list the volumes to see the bootable volume , the display name will be blank.

For example,

nova boot --flavor 2 \
    --block-device source=image,id=484e05af-a14d-4567-812b-28122d1c2260,dest=volume,size=10,shutdown=preserve,bootindex=0 \
    myInstanceFromVolume

$ cinder list
+-------------+--------+--------------+------+-------------+----------+-------------+
| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+-------------+--------+--------------+------+-------------+----------+-------------+
| 2fff50ab... | in-use | | 10 | None | true | 2e65c854... |
+-------------+--------+--------------+------+-------------+----------+-------------+

Now if I want to update the Display Name of the bootable volumn,a user need to execute
following (rename option is not available in Horizon)

$ cinder rename 2fff50ab... bootableVolume

Proposal :

It would be good for a end user to have a optional argument, where he can provide
the name for the bootable volume going to create. A optional argument for --block-device name=VOLUME_NAME
i.e

$ nova boot --flavor FLAVOR --block-device
source=SOURCE,id=ID,dest=DEST,size=SIZE,shutdown=PRESERVE,bootindex=INDEX,name=VOLUME_NAME
NAME