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<p class="MsoNormal">Hi Folks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’d like to get your feedback on a change we’ve been looking at which would allow the root disc size to vary within the constraints specified by the image Creator (via image metadata ) and the Cloud Provider (via flavors).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The problem we’re trying to solve is to cope with a range of images that have different root disc requirements without having to either create specific flavours for each image type of have all instances use a large root size when they don’t
need to. Imagine for example trying to have a common set of flavours for Linux and Windows without forcing all Linux instances to have a 30GB root disc.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We think we have an approach which will do this without preventing anyone’s existing use cases. The proposal is capture here as a blueprint
<a href="https://blueprints.launchpad.net/nova/+spec/variable-size-root-disk">https://blueprints.launchpad.net/nova/+spec/variable-size-root-disk</a> which in turn points to a full description here in the Wiki:
<a href="https://wiki.openstack.org/wiki/VariableSizeRootDisk">https://wiki.openstack.org/wiki/VariableSizeRootDisk</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We’ve also posted draft code that shows how this could be implemented here:
<a href="https://review.openstack.org/#/c/31521/">https://review.openstack.org/#/c/31521/</a>
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We’re aware that there is still work to do on this around unit tests, but wanted to get some early feedback on the approach.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Cheers,<o:p></o:p></p>
<p class="MsoNormal">Phil<o:p></o:p></p>
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