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["Gary W. Smith" <gary.smith@xxxxxxxx>]

Horizon is simply forwarding on nova's (arguably misleading) error
message to the user.  The proper place to fix this is in nova rather
than horizon.  It is not appropriate for horizon to try to reverse-
engineer nova's errors to try to figure out what the "real" problem is.

** Changed in: horizon
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1655964

Title:
  the error message when a invalid instance name is given on an instance
  creation have a generic error

Status in OpenStack Dashboard (Horizon):
  Invalid

Bug description:
  Hello guys,

  Here is my problem, when you give your instance a name with an
  exclusive numeric last part, it fails, example :

  cow.moo => ok
  cow.moo3 => ok
  cow => ok
  cow. => ok
  cow.333 => KO
  cow.333. => KO

  it's ok, because it's a conceptual choice :
  https://bugs.launchpad.net/nova/+bug/1581977

    RESP BODY: {"NeutronError": {"message": "Invalid input for dns_name.
  Reason: 'myinstance6.4' not a valid PQDN or FQDN. Reason: TLD '4' must
  not be all numeric.", "type": "HTTPBadRequest", "detail": ""}}

  
  but when a customer gives a invalid instance name the instance creation fails and the standard error message "no valid host was found" appears in Horizon, which has nothing to do with it.

  Could it be more interesting to get a more obvious error, in the same
  format we could have when we forget to chose an image ? something like
  "this instance name is not valid".

  I tried to modify "create_instance.py" and "update_instance.py" myself
  by simply add a regexp in

  name = forms.CharField(label=_("Instance Name"), max_length=255)

  but it isn't seems to be satisfactory at all.

  
  If you have a better idea it could be great !

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