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<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">The use cases defined (so far) cover these cases:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> Single service instance in a single service VM (agree this avoids complexity pointed out by Harshad)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> Multiple service instances on a single service VM (provides flexibility, extensibility)<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">Not explicitly covered is the case of a logical service across >1 VM.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This seems like a potentially common case, and can be added.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">But implementation-wise, when a service wants to span multiple service VMs, it seems that is a policy and scheduling decision to be made by the service plugin.
Question: Does the multiple VM use case put any new requirements on this framework (within its scope as a helper library for service plugins)?<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">Thx,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Greg<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"><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""> Bob Melander (bmelande) [mailto:bmelande@cisco.com]
<br>
<b>Sent:</b> Thursday, October 10, 2013 12:48 PM<br>
<b>To:</b> OpenStack Development Mailing List<br>
<b>Cc:</b> OpenStack Development Mailing List<br>
<b>Subject:</b> Re: [openstack-dev] [Neutron] Service VM discussion - Use Cases<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Possibly but not necessarily. Some VMs have a large footprint, have multi-service capability and physical devices with capabilities sufficient for tenant isolation are not that rare (especially if tenants can only indirectly "control" them
through a cloud service API).<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">My point is that if we take into account, in the design, the case where multiple service instances are hosted by a single service VM we'll be well positioned to support other use cases. But that is not to say the implementation effort should
target that aspect initially.<o:p></o:p></p>
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<p class="MsoNormal"><br>
Thanks,<o:p></o:p></p>
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<p class="MsoNormal"> Bob<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
10 okt 2013 kl. 15:12 skrev "Harshad Nakil" <<a href="mailto:hnakil@contrailsystems.com">hnakil@contrailsystems.com</a>>:<o:p></o:p></p>
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<p class="MsoNormal">Won't it be simpler to keep service instance as one or more VMs, rather than 1VM being many service instances?<o:p></o:p></p>
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<p class="MsoNormal">Usually a appliance is collectively (all it's functions) providing a service. Like firewall or load balancer. A appliance is packaged as VM. <o:p></o:p></p>
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<p class="MsoNormal">It will be easier to manage<o:p></o:p></p>
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<p class="MsoNormal">it will be easier for the provider to charge. <o:p></o:p></p>
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<p class="MsoNormal">It will be easier to control resource allocation. <o:p></o:p></p>
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<p class="MsoNormal">Once a appliance is physical device than you have all of the above issues and usually multi-tenancy implementation is weak in most of physical appliances. <br>
<br>
Regards <o:p></o:p></p>
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<p class="MsoNormal">-Harshad<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
On Oct 10, 2013, at 12:44 AM, "Bob Melander (bmelande)" <<a href="mailto:bmelande@cisco.com">bmelande@cisco.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Harshad,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">By service instance I referred to the logical entities that Neutron creates (e.g. Neutron's router). I see a service VM as a (virtual) host where one or several service instances can be placed.<o:p></o:p></p>
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<p class="MsoNormal">The service VM (at least if managed through Nova) will belong to a tenant and the service instances are owned by tenants.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If the service VM tenant is different from service instance tenants (which is a simple way to "hide" the service VM from the tenants owning the service instances) then it is not clear to me how the existing access control in openstack will
support pinning the service VM to a particular tenant owning a service instance. <o:p></o:p></p>
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<p class="MsoNormal"><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">Bob<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">From:
</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">Harshad Nakil <<a href="mailto:hnakil@contrailsystems.com">hnakil@contrailsystems.com</a>><br>
<b>Reply-To: </b>OpenStack Development Mailing List <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br>
<b>Date: </b>onsdag 9 oktober 2013 18:56<br>
<b>To: </b>OpenStack Development Mailing List <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br>
<b>Subject: </b>Re: [openstack-dev] [Neutron] Service VM discussion - Use Cases<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Admin creating service instance for a tenant could common use case. But ownership of service can be controlled via already existing access control mechanism in openstack. If the service instance belonged to
a particular project then other tenants should by definition should not be able to use this instance.<o:p></o:p></p>
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<p class="MsoNormal">On Tue, Oct 8, 2013 at 11:34 PM, Bob Melander (bmelande) <<a href="mailto:bmelande@cisco.com" target="_blank">bmelande@cisco.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif"">For use case 2, ability to "pin" an admin/operator owned VM to a particular tenant can be useful.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif"">I.e., the service VMs are owned by the operator but a particular service VM will only allow service instances from a single tenant.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif"">Thanks,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif"">Bob<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:
</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><Regnier>, Greg J <<a href="mailto:greg.j.regnier@intel.com" target="_blank">greg.j.regnier@intel.com</a>><br>
<b>Reply-To: </b>OpenStack Development Mailing List <<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>><br>
<b>Date: </b>tisdag 8 oktober 2013 23:48<br>
<b>To: </b>"<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>" <<a href="mailto:openstack-dev@lists.openstack.org" target="_blank">openstack-dev@lists.openstack.org</a>><br>
<b>Subject: </b>[openstack-dev] [Neutron] Service VM discussion - Use Cases<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p> </o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Re: blueprint:
<a href="https://blueprints.launchpad.net/neutron/+spec/adv-services-in-vms" target="_blank">
https://blueprints.launchpad.net/neutron/+spec/adv-services-in-vms</a><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Before going into more detail on the mechanics, would like to nail down use cases.
</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Based on input and feedback, here is what I see so far.
</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Assumptions:</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">- a 'Service VM' hosts one or more 'Service Instances'</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">- each Service Instance has one or more Data Ports that plug into Neutron networks</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">- each Service Instance has a Service Management i/f for Service management (e.g. FW rules)</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">- each Service Instance has a VM Management i/f for VM management (e.g. health monitor)</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Use case 1: Private Service VM
</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Owned by tenant</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">VM hosts one or more service instances</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Ports of each service instance only plug into network(s) owned by tenant</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Use case 2: Shared Service VM</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Owned by admin/operator</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">VM hosts multiple service instances</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:0in;margin-bottom:0in;margin-left:27.0pt;margin-bottom:.0001pt">
<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">The ports of each service instance plug into one tenants network(s)</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Service instance provides isolation from other service instances within VM</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p style="margin:0in;margin-bottom:.0001pt"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Use case 3: Multi-Service VM</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Either Private or Shared Service VM</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Support multiple service types (e.g. FW, LB, …)</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p style="margin-left:.75in"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif"">-</span><span style="font-size:7.0pt">
</span><span style="font-size:10.5pt;font-family:"Calibri","sans-serif"">Greg<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">_______________________________________________<br>
OpenStack-dev mailing list<br>
<a href="mailto:OpenStack-dev@lists.openstack.org">OpenStack-dev@lists.openstack.org</a><br>
<a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><o:p></o:p></p>
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<p class="MsoNormal">_______________________________________________<br>
OpenStack-dev mailing list<br>
<a href="mailto:OpenStack-dev@lists.openstack.org">OpenStack-dev@lists.openstack.org</a><br>
<a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev</a><o:p></o:p></p>
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