Comment 4 for bug 915151

Add Mark created FAQ here, since this page is more likely to get searched.
It solves my configuration problem.

faq/2004
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If you get e.g.
  ERROR: Malformed request url (HTTP 400) (Request-ID: req-b83b862f-6aed-4420-8849-6dcf7c2fe9ae)
as a response to Nova API, consider the following:
 1) If you think you're using keystone, make sure that
         auth_strategy = keystone
      is set in nova.conf
 2) Check that the tenant ID in the request matches the tenant you are authenticated under
See also bug #915151
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