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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">To the best of my understanding there are two parts to this, neither of which is fully where it ought to be:<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="MsoListParagraph" style="margin-left:22.5pt;text-indent:-.25in;mso-list:l1 level1 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It shouldn’t be a required parameter. If you give it a volume with everything it needs and not an image it should try to boot from that without throwing
an exception. Horizon only enforces the requirement because Nova does.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:22.5pt;text-indent:-.25in;mso-list:l1 level1 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As an optional parameter, specifying an image should allow you to create the instance with that image loaded onto the volume, which is a very important
part of the workflow for creating your own bootable volumes. This feature doesn’t currently exist in Nova, however.<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">I also don’t know offhand if there are blueprints or bug reports for either of those…<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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<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Gabriel<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""> openstack-bounces+gabriel.hurley=nebula.com@lists.launchpad.net [mailto:openstack-bounces+gabriel.hurley=nebula.com@lists.launchpad.net]
<b>On Behalf Of </b>Vishvananda Ishaya<br>
<b>Sent:</b> Saturday, May 26, 2012 8:35 PM<br>
<b>To:</b> Lorin Hochstein<br>
<b>Cc:</b> openstack@lists.launchpad.net (openstack@lists.launchpad.net)<br>
<b>Subject:</b> Re: [Openstack] Why is an image required when booting from volume<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If there is a separate kernel and ramdisk needed for the boot from volume, it is pulled from image properties. Otherwise it is basically useless.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Vish<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 May 26, 2012, at 8:22 AM, Lorin Hochstein wrote:<o:p></o:p></p>
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<p class="MsoNormal"><br>
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<o:p></o:p></p>
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<p class="MsoNormal">I'm trying to figure out boot from volume, both so I can use it and so I can add it to the docs. <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"> It seems that when calling "nova boot" or using Horizon, you need to specify an image. Why is that?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I naively tried to create a volume image by creating a volume and then doing on my volume server:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">dd if=/tmp/precise-server-cloudimg-amd64-disk1.img of=/dev/nova-volumes/volume-0000000d<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Then I tried this:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">$ nova boot --flavor 2 --key_name lorin --block_device_mapping /dev/vda=13:::0 test<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Which generated an error:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Invalid imageRef provided. (HTTP 400)<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 I try to specify an image, it at least attempts to boot:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">$ nova boot --flavor 2 --key_name lorin --block_device_mapping /dev/vda=13:::0 --image 7d6923d9-1c13-4405-ba0c-41c7487dd6bc test<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I noticed that the devstack example specifies an image: <a href="https://github.com/openstack-dev/devstack/blob/master/exercises/boot_from_volume.sh">https://github.com/openstack-dev/devstack/blob/master/exercises/boot_from_volume.sh</a>:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">VOL_VM_UUID=`nova boot --flavor $INSTANCE_TYPE --image $IMAGE --block_device_mapping vda=$VOLUME_ID:::0 --security_groups=$SECGROUP --key_name $KEY_NAME $VOL_INSTANCE_NAME | grep ' id ' | get_field 2`<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Looking at nova/api/openstack/compute/servers.py, it does look like _image_uuid_from_href() is called regardless of whether we are booting from volume or not. What is "--image" used for when booting from volume?<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">Take care,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Lorin<o:p></o:p></p>
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<p class="MsoNormal">--<o:p></o:p></p>
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<p class="MsoNormal">Lorin Hochstein<o:p></o:p></p>
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<p class="MsoNormal">Lead Architect - Cloud Services<o:p></o:p></p>
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<p class="MsoNormal">Nimbis Services, Inc.<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://www.nimbisservices.com/">www.nimbisservices.com</a><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" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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