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<p><font size="2" face="sans-serif">Continuing the discussion we had earlier today during the Neutron Group Policy weekly meeting [0], I would like to initiate a couple of email threads and follow up on a couple of important issues we need to agree on so we can move forward. In this email thread, I would like to discuss the policy-group relationship.</font><br>
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<font size="2" face="sans-serif">I want to summarize the discussion we had during the meeting [1] and see if we have reached an agreement:</font><br>
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<font size="2" face="sans-serif">There are two models for expressing the relationship between Groups and Policies that were discussed:</font><br>
<font size="2" face="sans-serif">1- Policies are defined for a source Group and a destination Group</font><br>
<font size="2" face="sans-serif">2- Groups specify the Policies they "provide" and the Policies they "consume"</font><br>
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<font size="2" face="sans-serif">As expressed during the IRC meeting, both models have strong support and we decided to have a resource model that can be used to express both models. The solution we came up with was rather simple:</font><br>
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<font size="2" face="sans-serif">Update the resource model (shown in the attribute tables and the taxonomy in the google doc [2]) such that policy can refer to a "list" of source Groups and a "list" of destination Groups.</font><br>
<font size="2" face="sans-serif">This boils down to having two attributes namely, src_groups and destination_groups (both list of uuid-str type) replacing the current attributes src_group and dest_group, respectively.</font><br>
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<font size="2" face="sans-serif">This change simply allows the support for both models. For supporting model 1, specify a single source Group and a single destination Group. For model 2, specify the producers of a Policy in the source Group list and specify the consumers of the Policy in the destination Group list. </font><br>
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<font size="2" face="sans-serif">If there is agreement, I will update the taxonomy and the attribute tables in the doc.</font><br>
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<font size="2" face="sans-serif">Best,</font><br>
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<font size="2" face="sans-serif">Mohammad</font><br>
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<font size="2" face="sans-serif">[0] <a href="https://wiki.openstack.org/wiki/Meetings/Neutron_Group_Policy">https://wiki.openstack.org/wiki/Meetings/Neutron_Group_Policy</a></font><br>
<font size="2" face="sans-serif">[1] <a href="http://eavesdrop.openstack.org/meetings/networking_policy/2013/networking_policy.2013-12-12-16.01.log.html">http://eavesdrop.openstack.org/meetings/networking_policy/2013/networking_policy.2013-12-12-16.01.log.html</a></font><br>
<font size="2" face="sans-serif">[2] <a href="https://docs.google.com/document/d/1ZbOFxAoibZbJmDWx1oOrOsDcov6Cuom5aaBIrupCD9E/edit#heading=h.x1h06xqhlo1n">https://docs.google.com/document/d/1ZbOFxAoibZbJmDWx1oOrOsDcov6Cuom5aaBIrupCD9E/edit#heading=h.x1h06xqhlo1n</a> (Note the new additions are at the end of the document.)</font><br>
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