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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I support this API proposal. It is simple and conveys clear semantics. Thanks Ryan!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Cathy<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Hemanth Ravi [mailto:hemanthraviml@gmail.com]
<br>
<b>Sent:</b> Wednesday, July 30, 2014 11:13 AM<br>
<b>To:</b> OpenStack Development Mailing List (not for usage questions)<br>
<b>Cc:</b> Subrahmanyam Ongole<br>
<b>Subject:</b> Re: [openstack-dev] [neutron][policy] Bridging the 2-group gap in group policy<o:p></o:p></span></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal">Adding this CLI command seems to be a good way to provide support for the second model. This can be submitted as a new review patch to work through the approaches to implement this. I suggest the current CLI patch [1] be reviewed for the
existing spec and completed.<o:p></o:p></p>
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<p class="MsoNormal">Ryan, would it possible for you to start a new review submit for the new command(s). Could you also provide any references for "profiled" API in IETF, CCITT.<o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">-hemanth<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">[1] <a href="https://review.openstack.org/#/c/104013">https://review.openstack.org/#/c/104013</a><o:p></o:p></p>
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<p class="MsoNormal">On Tue, Jul 29, 2014 at 3:16 PM, Ryan Moats <<a href="mailto:rmoats@us.ibm.com" target="_blank">rmoats@us.ibm.com</a>> wrote:<o:p></o:p></p>
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<p><span style="font-family:"Arial","sans-serif"">As promised in Monday's Neutron IRC minutes [1], this mail is a "trip down memory lane" looking at the history of the</span><br>
<span style="font-family:"Arial","sans-serif"">Neutron GP project.. The original GP google doc [2] included specifying policy via both a produce/consume 1-group</span><br>
<span style="font-family:"Arial","sans-serif"">approach and as a link between two groups. There was an email thread [3] that discussed the relationship between</span><br>
<span style="font-family:"Arial","sans-serif"">these models early on, but that discussion petered out and during a later IRC meeting [4] the concept of contracts</span><br>
<span style="font-family:"Arial","sans-serif"">were added, but without changing the basic use case requirements from the original document. A followup meeting [5]</span><br>
<span style="font-family:"Arial","sans-serif"">began the discussion of how to express the original model from the contract data model but that discussion doesn't</span><br>
<span style="font-family:"Arial","sans-serif"">appear to have been completed either. The PoC in Atlanta raised a set of issues [6],[7] around the complexity of the</span><br>
<span style="font-family:"Arial","sans-serif"">resulting PoC code.</span><br>
<br>
<span style="font-family:"Arial","sans-serif"">The good news is that having looked through the proposed GP code commits (links to which can be found at [8) I</span><br>
<span style="font-family:"Arial","sans-serif"">believe that folks that want to be able to specify policies via the 2-group approach (and yes, I'm one of them) can have</span><br>
<span style="font-family:"Arial","sans-serif"">that without changing the model encoded in those commits. Rather, it can be done via the WiP CLI code commit by</span><br>
<span style="font-family:"Arial","sans-serif"">providing a "profiled" API - this is a technique used by the IETF, CCITT, etc. to allow a rich API to be consumed in</span><br>
<span style="font-family:"Arial","sans-serif"">common ways. In this case, what I'm envisioning is something like</span><br>
<br>
<span style="font-family:"Arial","sans-serif"">neutron policy-apply [policy rule] [src group] [destination group]</span><br>
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<span style="font-family:"Arial","sans-serif"">in this case, the CLI would perform the contract creation for the policy rule, and assigning the proper produce/consume</span><br>
<span style="font-family:"Arial","sans-serif"">edits to the specified source and destination groups. Note: this is in addition to the CLI providing direct access to the</span><br>
<span style="font-family:"Arial","sans-serif"">underlying data model. I believe that this is the simplest way to "bridge the gap" and provide support to folks who want</span><br>
<span style="font-family:"Arial","sans-serif"">to specify policy as something between two groups.</span><br>
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<span style="font-family:"Arial","sans-serif"">Ryan Moats (regXboi)</span><br>
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<span style="font-family:"Arial","sans-serif"">References:</span><br>
<span style="font-family:"Arial","sans-serif"">[1] </span><a href="http://eavesdrop.openstack.org/meetings/networking/2014/networking.2014-07-28-21.02.log.txt" target="_blank"><span style="font-family:"Arial","sans-serif"">http://eavesdrop.openstack.org/meetings/networking/2014/networking.2014-07-28-21.02.log.txt</span></a><br>
<span style="font-family:"Arial","sans-serif"">[2] </span><a href="https://docs.google.com/document/d/1ZbOFxAoibZbJmDWx1oOrOsDcov6Cuom5aaBIrupCD9E/edit" target="_blank"><span style="font-family:"Arial","sans-serif"">https://docs.google.com/document/d/1ZbOFxAoibZbJmDWx1oOrOsDcov6Cuom5aaBIrupCD9E/edit#</span></a><br>
<span style="font-family:"Arial","sans-serif"">[3] </span><a href="http://lists.openstack.org/pipermail/openstack-dev/2013-December/022150.html" target="_blank"><span style="font-family:"Arial","sans-serif"">http://lists.openstack.org/pipermail/openstack-dev/2013-December/022150.html</span></a><br>
<span style="font-family:"Arial","sans-serif"">[4] </span><a href="http://eavesdrop.openstack.org/meetings/networking_policy/2014/networking_policy.2014-02-27-19.00.log.html" target="_blank"><span style="font-family:"Arial","sans-serif"">http://eavesdrop.openstack.org/meetings/networking_policy/2014/networking_policy.2014-02-27-19.00.log.html</span></a><br>
<span style="font-family:"Arial","sans-serif"">[5] </span><a href="http://eavesdrop.openstack.org/meetings/networking_policy/2014/networking_policy.2014-03-20-19.00.log.html" target="_blank"><span style="font-family:"Arial","sans-serif"">http://eavesdrop.openstack.org/meetings/networking_policy/2014/networking_policy.2014-03-20-19.00.log.html</span></a><br>
<span style="font-family:"Arial","sans-serif"">[6] </span><a href="http://lists.openstack.org/pipermail/openstack-dev/2014-May/035661.html" target="_blank"><span style="font-family:"Arial","sans-serif"">http://lists.openstack.org/pipermail/openstack-dev/2014-May/035661.html</span></a><br>
<span style="font-family:"Arial","sans-serif"">[7] </span><a href="http://eavesdrop.openstack.org/meetings/networking_policy/2014/networking_policy.2014-05-22-18.01.log.html" target="_blank"><span style="font-family:"Arial","sans-serif"">http://eavesdrop.openstack.org/meetings/networking_policy/2014/networking_policy.2014-05-22-18.01.log.html</span></a><br>
<span style="font-family:"Arial","sans-serif"">[8] </span><a href="https://wiki.openstack.org/wiki/Meetings/Neutron_Group_Policy" target="_blank"><span style="font-family:"Arial","sans-serif"">https://wiki.openstack.org/wiki/Meetings/Neutron_Group_Policy</span></a><o:p></o:p></p>
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