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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi Dave,<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">When we try to boot our VM we mount the label config-2 and access its contents,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">But it is seen that in some customer deployments, the label has different name (ex: CONFIG-2), hence our code breaks.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">We want to make sure, if it is always config-2 ?? on what basis it can change ?? or is it set at some location in Openstack config files ??<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">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Bhaskar<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"><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"> Dave Walker [mailto:email@daviey.com]
<br>
<b>Sent:</b> Monday, April 27, 2015 2:35 PM<br>
<b>To:</b> Bhaskar Rao<br>
<b>Cc:</b> openstack-qa@lists.openstack.org; openstack@lists.openstack.org<br>
<b>Subject:</b> Re: [Openstack] config drive on opentack label query<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p><br>
On 27 Apr 2015 09:32, "Bhaskar Rao" <<a href="mailto:bhaskar.rao@citrix.com">bhaskar.rao@citrix.com</a>> wrote:<br>
><br>
> Hi All,<br>
><br>
> <br>
><br>
> With help of user data files, we can provide instance specific details (like IP address, Gateway etc.) to VM booting in OpenStack environment.<br>
><br>
> This user data file gets attached with VM as part of specific label for example config-2.<br>
><br>
> <br>
><br>
> We want to know how this labeling mechanism works? Who decides to give name ‘config-2’ to use for supplied info?<br>
><br>
> Is there any possibility that instead of ‘config-2’, it can use another name e.g. ‘config-x’?<br>
><br>
> <br>
><br>
> Thanks,<br>
><br>
> Bhaskar<br>
><o:p></o:p></p>
<p>Hi,<o:p></o:p></p>
<p>The name is specifically crafted for config-drive version 2. The reference consumer of this is cloud-init (on linux), but other projects such as cloudbase-init (on windows), also consume this standard. This standard was originally written for OpenStack.<o:p></o:p></p>
<p>Version 2 was created due to short fallings with the original spec, and both of these consumers specifically match on the device being named 'config-v2' to avoid miss-parsing the wrong device. Therefore changing the name in the hard coded portion of nova
would break the consumers.<o:p></o:p></p>
<p>To flip the topic slightly, why would you want to use a different named device? What are you trying to do?<o:p></o:p></p>
<p>--<br>
Kind Regards,<br>
Dave Walker<o:p></o:p></p>
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