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[Prateek Arora <parora@xxxxxxxxxx>]

As per the last comment of Kenichi, this need not be fixed now as it is
in RPCv2 which has been deprecated.

** Changed in: nova
     Assignee: Prateek Arora (parora) => (unassigned)

** Changed in: nova
       Status: In Progress => Invalid

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https://bugs.launchpad.net/bugs/1431932

Title:
  Make the server group invalid format message more verbose

Status in OpenStack Compute (nova):
  Invalid

Bug description:
  The ServerGroup create v2 API does the following check on the
  requested name for the group:

          if not common.VALID_NAME_REGEX.search(value):
                  msg = _("Invalid format for name: '%s'") % value
                  raise nova.exception.InvalidInput(reason=msg)

  where VALID_NAME_REGEX = re.compile("^(?! )[\w. _-]+(?<! )$",
  re.UNICODE)

  Since other APIs allow non-alphanumeric characters for names, the
  "Inavlid format for name" error message is not especially helpful in
  letting the caller know what is invalid about the name they requested.

  I think a more descriptive/helpful message would be:

  msg = _("Invalid format for name: '%s'. Names can only contain
  alphanumeric characters, dashes, underscores, periods, and spaces and
  cannot begin or end with a space.") % value

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