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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">I have not yet done a blueprint or spec for this in Glance.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">But can do that now.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Is Glance using Launchpad or Storyboard ?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri">Greg.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Calibri"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Calibri;color:black">From: </span>
</b><span style="font-family:Calibri;color:black">Abhishek Kekane <akekane@redhat.com><br>
<b>Reply-To: </b>"openstack-dev@lists.openstack.org" <openstack-dev@lists.openstack.org><br>
<b>Date: </b>Thursday, October 4, 2018 at 2:08 AM<br>
<b>To: </b>"openstack-dev@lists.openstack.org" <openstack-dev@lists.openstack.org><br>
<b>Subject: </b>Re: [openstack-dev] [glance] Glance API Caching Enhancements for Edge Computing<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"><span style="font-family:Verdana">Hi Greg,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Verdana"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Verdana">Have you actually filed a blueprint or specs for this in glance?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Verdana">If yes could you please provide a reference for the same.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:Verdana"><o:p> </o:p></span></p>
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<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Thanks & Best Regards,<o:p></o:p></p>
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<p class="MsoNormal">Abhishek Kekane<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, Oct 4, 2018 at 12:34 AM Waines, Greg <<a href="mailto:Greg.Waines@windriver.com">Greg.Waines@windriver.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Glance Team,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">I am following up on discussions in the edge-computing PTG meetings.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">There were discussions on potential enhancements to Glance API Caching for support of the proposed MVP Edge Architecture.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">And I took the action to write up a blueprint and a specification for these enhancements ... and will follow up with implementation.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">I thought I’d start the discussions on the mailing list ... and if everyone is still in agreement,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">then I’ll move the high-level definition/requirements to Glance’s Launchpad (or Storyboard?) and</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">write up a Glance spec and review it in Gerrit.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<b><u><span style="font-size:11.0pt">THE PROPOSAL:</span></u></b><o:p></o:p></p>
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<span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="font-size:11.0pt">Enhance Glance API Caching such that </span><o:p></o:p></p>
<p class="m4283397071727045102msolistparagraph" style="margin-left:1.0in"><span style="font-size:11.0pt">a)</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt">It works between two Glance Services (i.e. Glance at a Central OpenStack Cloud and Glance at an Edge OpenStack Cloud)</span><o:p></o:p></p>
<p class="m4283397071727045102msolistparagraph" style="margin-left:1.5in"><span style="font-size:11.0pt;font-family:Symbol">·</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt">i.e. current Glance API Caching only works with external webservers</span><o:p></o:p></p>
<p class="m4283397071727045102msolistparagraph" style="margin-left:1.0in"><span style="font-size:11.0pt">b)</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt">Enable the Edge Cloud Glance API Caching to support the ability to locally use those cached images (e.g. nova boot ...)<br>
even when network connectivity is lost to the Central Cloud Glance Service</span><o:p></o:p></p>
<p class="m4283397071727045102msolistparagraph" style="margin-left:1.5in"><span style="font-size:11.0pt;font-family:Symbol">·</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt">i.e. image meta-data is required in order to service a ‘nova boot ...’, and<br>
today image meta-data is NOT cached by Glance API Caching.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="font-size:11.0pt">The proposed solution should generically work between any two Glance Services.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="font-size:11.0pt">e.g. </span><o:p></o:p></p>
<p class="m4283397071727045102msolistparagraph" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:Symbol">·</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt">in a Multi-Region Environment, </span><o:p></o:p></p>
<p class="m4283397071727045102msolistparagraph" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:Symbol">·</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt">in a StarlingX Distributed Cloud,</span><o:p></o:p></p>
<p class="m4283397071727045102msolistparagraph" style="margin-left:1.0in"><span style="font-size:11.0pt;font-family:Symbol">·</span><span style="font-size:7.0pt">
</span><span style="font-size:11.0pt">etc.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="font-size:11.0pt">The proposed solution need only deal with the Edge Cloud Glance talking to a single Central Cloud Glance.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.5in">
<span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Let me know if you have any a questions or comments,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">Greg.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">p.s.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><u><span style="font-size:11.0pt">Background:</span></u><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">More info on the edge-computing group’s MVP Edge Architecture can be found here:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">
<a href="https://www.dropbox.com/s/255x1cao14taer3/MVP-Architecture_edge-computing_PTG.pptx?dl=0" target="_blank">
https://www.dropbox.com/s/255x1cao14taer3/MVP-Architecture_edge-computing_PTG.pptx?dl=0</a>
</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">and</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt">
<a href="https://docs.google.com/document/d/1Mq6bSm_lES56S4gygEuhmMbEeCI2nBFl_U5vl50wih8/edit?ts=5baa654e#heading=h.ncllqse6iw0u" target="_blank">
https://docs.google.com/document/d/1Mq6bSm_lES56S4gygEuhmMbEeCI2nBFl_U5vl50wih8/edit?ts=5baa654e#heading=h.ncllqse6iw0u</a>
</span><o:p></o:p></p>
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