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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi Mark,<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" style="margin-left:5.0pt"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Replied
</span><b><span style="font-size:14.0pt;font-family:"Calibri",sans-serif;color:#1F497D">inline</span></b><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:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Mark Goddard [mailto:mark@stackhpc.com]
<br>
<b>Sent:</b> Monday, June 3, 2019 2:16 PM<br>
<b>To:</b> Kumari, Madhuri <madhuri.kumari@intel.com><br>
<b>Cc:</b> openstack-discuss@lists.openstack.org<br>
<b>Subject:</b> Re: [Nova][Ironic] Reset Configurations in Baremetals Post Provisioning<o:p></o:p></span></p>
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<p class="MsoNormal">On Mon, 3 Jun 2019 at 06:57, Kumari, Madhuri <<a href="mailto:madhuri.kumari@intel.com">madhuri.kumari@intel.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">Hi Ironic, Nova Developers,<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">I am currently working on implementing Intel Speed Select(ISS) feature[1] in Ironic and I have a use case where I want to change ISS configuration in BIOS after a node is provisioned.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Such use case of changing the configuration post deployment is common and not specific to ISS. A real-life example for such a required post-deploy configuration change is the change
of BIOS settings to disable hyper-threading in order to address a security vulnerability.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Currently there is no way of changing any BIOS configuration after a node is provisioned in Ironic. One solution for it is to allow manual deploy steps in Ironic[2](not implemented
yet) which can be trigged by changing traits in Nova.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">For this purpose, we would need to change a trait of the server’s flavor in Nova. This trait is mapped to a deploy step in Ironic which does some operation(change BIOS config and
reboot in this use case).<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">In Nova, the only API to change trait in flavor is resize whereas resize does migration and a reboot as well.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:2.0pt">In short, I am looking for a Nova API that only changes the traits, and trigger the ironic deploy steps but no reboot and migration. Please suggest.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal"><span class="gmaildefault"><span style="font-family:"Verdana",sans-serif">Hi, it is possible to modify a flavor (openstack flavor set <flavor> --property <key>=<value>). However, changes to a flavor are not reflected in instances that were
previously created from that flavor. Internally, nova stores an 'embedded flavor' in the instance state.</span></span> <span class="gmaildefault"><span style="font-family:"Verdana",sans-serif">I'm not aware of any API that would allow modifying the embedded
flavor, nor any process that would synchronise those changes to ironic.<o:p></o:p></span></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"><b><span style="font-size:14.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The resize API in Nova allows changing the flavor of an instance. It does migration and reboots. But the API is not implemented for IronicDriver.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Though this doesn’t match our use case but seems to be the only available one that allows changing a flavor and ultimately a trait.<o:p></o:p></span></b></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Thanks in advance.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b> </b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Regards,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Madhuri<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">[1]
<a href="https://specs.openstack.org/openstack/ironic-specs/specs/not-implemented/support-intel-speed-select.html" target="_blank">
https://specs.openstack.org/openstack/ironic-specs/specs/not-implemented/support-intel-speed-select.html</a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">[2]
<a href="https://storyboard.openstack.org/#!/story/2005129" target="_blank">https://storyboard.openstack.org/#!/story/2005129</a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:2.0pt"><span style="font-size:10.0pt;font-family:"Segoe UI",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:2.0pt"><span style="font-size:10.0pt;font-family:"Segoe UI",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:2.0pt"><span style="font-size:10.0pt;font-family:"Segoe UI",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:2.0pt"><span style="font-size:10.0pt;font-family:"Segoe UI",sans-serif"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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