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<p class="MsoNormal"><span style="color:#1F497D">Hi All,</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D">Just need some clarification and would like to get you guys feedback on managing VMs using OpenNebula in your environment.
</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><u><span style="color:#1F497D">Our current practice as below (using OpenNebula 4.2):</span></u></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="color:#1F497D"><span style="">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">New VM request</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Clone existing image (master image) to a new image. All the images are persistent.
</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Clone existing template (master template) to a new template.</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Update the new template – set cpu/vcpu, memory, image (point to newly created image), ip address, etc</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Instantiate the template</span></p>
<p class="MsoListParagraph"><span style="color:#1F497D"> </span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="color:#1F497D"><span style="">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Update the spec of the VM</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Shutdown / delete the running VM</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Update the template belongs to that particular VM – e.g set the new memory size</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Instantiate the template</span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="color:#1F497D">Note: a) In our setup, every VM will have their own template as per done in #1</span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="color:#1F497D"> b) Reason being update the template & re-instantiate instead of just update the memory in VM is because of #3 below</span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="color:#1F497D"> </span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt"><span style="color:#1F497D"><span style="">3.<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Repair the VM</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">In some cases the VM’s filesystem will have some errors (eg: due to force shutdown / nfs issues) therefore require to run fsck using live CD.</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Image type CDROM cannot be attached thru VM list page (click on the VM -> storage tab)</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Update the VM’s template – add disk and choose the ISO image, choose boot = cdrom</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Instantiate the template and fix the errors using the live CD</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Shutdown / delete the running VM</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Update the VM’s template – remove the ISO image and choose boot = hd</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Instantiate the template</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D">From the above scenario, anything that we are doing inefficiently? Im still new to this OpenNebula so appreciate you guys feedback / suggestion</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><u><span style="color:#1F497D">Testing environment (OpenNebula 4.8)</span></u></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D">To further understand on this OpenNebula, I have setup ONE 4.8 and testing the Cloud View and see how I can improve my operation / VM administration.</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D">The way user can create VM in Cloud View is the one I need – user define the VM name, choose the template (OS), set the memory & CPU and launch it. Very simple. But unfortunately this only works with non-persistent
image type. In my case, I cannot use non-persistent image because of the reason stated in #2 and #3 above.</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D">So what I think Cloud View can be improved is:</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Based on config parameter (oned.conf -> ONE_DEPLOY=Persistent), when user create a VM, a template should be created and the image should be cloned as persistent image. This is kinda same behavior as “Save” VM
with only different is the image persistent yes/no and template spec</span></p>
<p class="MsoListParagraph" style="margin-left:54.0pt; text-indent:-18.0pt"><span style="color:#1F497D"><span style="">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><span style="color:#1F497D">Able to attach / detach CDROM</span></p>
<p class="MsoNormal"><span style="color:#1F497D"></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Feel free to comment on this and provide some feedback.</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D">--</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Regards,</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Anandharaj</span></p>
<p class="MsoNormal"> </p>
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