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<p class="MsoNormal">Hello List,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have the following situation and would be thankful for any help or suggestions.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We provide images to our customers, upon which we set the os_type metadata. We use this to help schedule instances to host aggregates, so we can control where certain OS’s land. This works great for new instances, that are created from
our images.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We have the following problems though.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo1">Instances created prior to the introduction of the os_type metadata existing on the image, this metadata is not flowed down, and as such these instances have NULL<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo1">Instances created from a snapshot do not seem to get the os_type flowed down<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l1 level1 lfo1">Instances imported using our migration tool do not end up with the os_type being set either.<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Currently the only way I can see to set os_type on an instance is to manually (yuk) update the database for each and every instance, which is missing it.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Does anyone have any ideas how this can be updated without manually modifying the database.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My second thought was to maybe make use of the instance metadata that you can set via the CLI or API, but then I run in to the issue that there is not a nova filter that is able to use instance metadata, and in my brief play with the code,
it looks like (user) metadata is not passed in as part of the instance spec dict that is used to schedule instances.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I was thinking of writing a custom filter, but I’m not sure how compliant it would be to have a function making a call to try and collect the instance metadata.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In summary, I need to solve two things. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2">How do I set os_type on instances in a way that doesn’t involve editing the database.<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo2">Or How can I use another piece of metadata that I can set via the api, which also is exposed to the filter scheduler.
<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Rgds<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB">Steve.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<div style="mso-element:para-border-div;border-top:solid windowtext 1.0pt;border-left:none;border-bottom:solid windowtext 1.0pt;border-right:none;padding:1.0pt 0cm 1.0pt 0cm">
<p class="MsoNormal" style="line-height:150%;border:none;padding:0cm"><span style="font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-GB">The future has already arrived. It's just not evenly distributed yet - William Gibson<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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