Comment 1 for bug 1365702

This happens as well with the datastore-version and size optional parameters.

[vkmc@heisenbug ~]$ trove create foo 2
ERROR: Please specify datastore. (HTTP 400)
[vkmc@heisenbug ~]$ trove create fun 2 --datastore mysql
ERROR: Default version for datastore 'mysql' not found. (HTTP 400)
[vkmc@heisenbug ~]$ trove create fun 2 --datastore mysql --datastore_version mysql-5.5
ERROR: Volume size was not specified. (HTTP 400)
[vkmc@heisenbug ~]$ trove create fun 2 --datastore mysql --datastore_version mysql-5.5 --size=2
+-------------------+--------------------------------------+
| Property | Value |
+-------------------+--------------------------------------+
| created | 2014-12-29T20:45:57 |
| datastore | mysql |
| datastore_version | mysql-5.5 |
| flavor | 2 |
| id | 18807037-18da-4539-95b5-df636b08bf67 |
| name | fun |
| status | BUILD |
| updated | 2014-12-29T20:45:57 |
| volume | 2 |
+-------------------+--------------------------------------+

Simply making them required would solve the problem.