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</o:shapelayout></xml><![endif]--></head><body lang=ZH-CN link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hi Dolph,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'> Here it is, <a href="http://profsandhu.com/confrnc/misconf/nss14-preprint-bo.pdf">http://profsandhu.com/confrnc/misconf/nss14-preprint-bo.pdf</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'> You may have a look at it and see if it’s reasonable.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'>Darren<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:等线'>发件人<span lang=EN-US>:</span></span></b><span lang=EN-US style='font-size:11.0pt;font-family:等线'> Dolph Mathews [mailto:dolph.mathews@gmail.com] <br></span><b><span style='font-size:11.0pt;font-family:等线'>发送时间<span lang=EN-US>:</span></span></b><span lang=EN-US style='font-size:11.0pt;font-family:等线'> 2015</span><span style='font-size:11.0pt;font-family:等线'>年<span lang=EN-US>12</span>月<span lang=EN-US>15</span>日<span lang=EN-US> 6:10<br></span><b>收件人<span lang=EN-US>:</span></b><span lang=EN-US> OpenStack Development Mailing List (not for usage questions) <openstack-dev@lists.openstack.org><br></span><b>主题<span lang=EN-US>:</span></b><span lang=EN-US> Re: [openstack-dev] [keystone] Is "domain" a mapping to real-world cloud tenant?<o:p></o:p></span></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><div><p class=MsoNormal><span lang=EN-US>Unfortunately, "tenancy" has multiple definitions in our world so let me try to clarify further! Do you have a link to that paper?<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>Tenants (v2) and projects (v3) have a history as serving to isolate the resources (VMs, networks, etc) of multiple tenants. They literally provide for multitenancy.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>Domains exist at a higher level, and actually (unfortunately) serve a multiple purposes.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>The first of which is as a container for multiple tenants/projects - think of domains as the billable entity in a public cloud. A single domain might be responsible for deploying multiple department's or project's resources in the cloud (each of which requires multi-tenant isolation, and thus has many tenants/projects).<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>The second purpose is that of authorization -- in keystone, you might need domain-level authorization to create projects and assign roles. The same might apply to domain-specific quotas, domain-specific policies, and other domain-level concerns.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>Lastly, domains serve as a namespaces for users and groups (identity / authentication) within keystone itself. They are analogous to identity providers in that regard.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>Hope this helps!<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US>On Mon, Dec 14, 2015 at 2:56 AM, darren wang <<a href="mailto:darren_wang@outlook.com" target="_blank">darren_wang@outlook.com</a>> wrote:<o:p></o:p></span></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Hi,<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>I am wondering whether </span>“<span lang=EN-US>domain</span>”<span lang=EN-US> is a mapping to a real-world cloud tenant (not the counterpart of </span>“<span lang=EN-US>project</span>”<span lang=EN-US> in v2 Identity API) because recently I read a paper that describes </span>“<span lang=EN-US>domain</span>”<span lang=EN-US> as a fit for the abstract concept </span>“<span lang=EN-US>cloud tenant</span>”<span lang=EN-US>. Does this saying stay in line with community</span>’<span lang=EN-US>s purpose?<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Thanks!<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US><br>__________________________________________________________________________<br>OpenStack Development Mailing List (not for usage questions)<br>Unsubscribe: <a href="http://OpenStack-dev-request@lists.openstack.org?subject:unsubscribe" target="_blank">OpenStack-dev-request@lists.openstack.org?subject:unsubscribe</a><br><a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><o:p></o:p></span></p></blockquote></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></div></div></body></html>