Hi All,
Just need some clarification and would like to get you guys feedback on
managing VMs using OpenNebula in your environment.
Our current practice as below (using OpenNebula 4.2):
1. New VM request
- Clone existing image (master image) to a new image. All the images
are persistent.
- Clone existing template (master template) to a new template.
- Update the new template - set cpu/vcpu, memory, image (point to
newly created image), ip address, etc
- Instantiate the template
2. Update the spec of the VM
- Shutdown / delete the running VM
- Update the template belongs to that particular VM - e.g set the new
memory size
- Instantiate the template
Note: a) In our setup, every VM will have their own template as per done in #1
b) Reason being update the template & re-instantiate instead of
just update the memory in VM is because of #3 below
3. Repair the VM
- 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.
- Image type CDROM cannot be attached thru VM list page (click on the
VM -> storage tab)
- Update the VM's template - add disk and choose the ISO image, choose
boot = cdrom
- Instantiate the template and fix the errors using the live CD
- Shutdown / delete the running VM
- Update the VM's template - remove the ISO image and choose boot = hd
- Instantiate the template
>From the above scenario, anything that we are doing inefficiently? Im still
>new to this OpenNebula so appreciate you guys feedback / suggestion
Testing environment (OpenNebula 4.8)
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.
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.
So what I think Cloud View can be improved is:
- 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
- Able to attach / detach CDROM
Feel free to comment on this and provide some feedback.
--
Regards,
Anandharaj
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