Name contianing special character "<" gives multiple results

[Danny Cocks]

In creating this bug report, I want to mention it is hard to place into the right package, as the responsibility for it lies in several packages. I believe that if the behaviour in the python-designateclient library were improved, then it'd allow the other packages to behave in more expected fashion. For this report I have kept it as specific to python-designateclient as possible.

The bug in particular is: attempting to create a recordset using a name beginning with "<" fails as the designate REST API returns multiple results. The errors given are similar to:

  Multiple matches found for <project_id>.example.org., please use ID instead.

I believe this is due to the REST API translating an initial "<" as a SQL "less than" query, and this query is made when the designateclient tries to call

  zone = v2_utils.resolve_by_name(self.list, zone)

This attempts to obtain the ID of the zone by querying the REST API with something like:

  GET /v2/zones?name=%3Cproject_id%3E.example.org.

And as the result can return more than 1 name, we hit the unusual "Multiple matches" error.

I believe this scenario could be handled in several different ways:

1) Change how the query is sent to designate, to not invoke the "less than" SQL. I'm not sure how to do this though...

2) Reject names which begin with "<" with a NotFound exception.

3) Throw a different kind of error.

Note: There is a separate issue at play that is causing us to make this weird query. We are setting the dns_domain in neutron netorks/ports to "<project_id>.example.org." and finding it is not being translated by the neutron dns extension. I am yet to explore this other issue fully yet.