[Bug 1655182] Re: keystone-manage mapping_engine tester problems

[Frode Nordahl]

As bug 1677730 demonstrates, this is also a bug that renders the
mapping_engine command unusable on stable/newton and stable/mitaka.

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https://bugs.launchpad.net/bugs/1655182

Title:
  keystone-manage mapping_engine tester problems

Status in Ubuntu Cloud Archive:
  Fix Released
Status in OpenStack Identity (keystone):
  Fix Released
Status in keystone package in Ubuntu:
  Fix Released

Bug description:
  [Impact]

   * A bug in keystone-manage tool prohibits the use of the
  mapping_engine command for testing federation rules.

   * Users of Keystone Federation will not be able to verify their
  mapping rules before pushing these to production.

   * Not being able to test rules before pushing to production is a
  major operational challenge for our users.

   * The proposed upload fixes this by backporting a fix for this issue
  from upstream stable/ocata.

  [Test Case]

   * Deploy keystone using Juju with this bundle:
     http://pastebin.ubuntu.com/24855409/

   * ssh to keystone unit, grab artifacts and run command:
     - mapping.json: http://pastebin.ubuntu.com/24855419/
     - input.txt: http://pastebin.ubuntu.com/24855420/
     - command:
     'keystone-manage mapping_engine --rules mapping.json --input input.txt'

   * Observe that command provides no output and that a Python Traceback
  is printed in /var/log/keystone/keystone.log

   * Install the proposed package, repeat the above steps and observe
  that the command now outputs its interpretation and effect of the
  rules.

  [Regression Potential]

   * keystone-manage mapping_engine is a operational test tool and is
  solely used by the operator to test their rules.

   * The distributed version of this command in Xenial and Yakkety does
  currently not work at all.

   * The change will make the command work as our users expect it to.

  [Original bug description]
  There are several problems with keystone-manage mapping_engine

  * It aborts with a backtrace because of wrong number of arguments
    passed to the RuleProcessor

  * The --engine-debug option does not work.

  * Error messages related to input data are cryptic and inprecise.

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