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ducle
12-Dec-2017, 22:59
Hi guys,
I have one case to ask. So, I have the OpenStack Cloud 7(SOC 7) up and running. One of the purpose is to provide VMs that people can use to do labs exercises. Currently, I have an instance on the cloud running SLES12 SP3 and i tried to install XEN hypervisor on top of that instance. After installation, the system ask to reboot to XEN kernel. I did reboot to the XEN kernel but it failed eventually. The instance shut down itself. So i tried to start it again and booted to XEN hypervisor kernel. Then the system hang forever at the step "A start job is running for dev-disk-by\x2duuid-ebdeead6\x2d...". I have the screenshot. Can anyone tell me what is the problems? Are there any way to work around for that. Thanks alot. I am happy to give more details on the environment.

smflood
13-Dec-2017, 00:17
ducle Wrote in message:

> I have one case to ask. So, I have the OpenStack Cloud 7(SOC 7) up and
> running. One of the purpose is to provide VMs that people can use to do
> labs exercises. Currently, I have an instance on the cloud running
> SLES12 SP3 and i tried to install XEN hypervisor on top of that
> instance. After installation, the system ask to reboot to XEN kernel. I
> did reboot to the XEN kernel but it failed eventually. The instance shut
> down itself. So i tried to start it again and booted to XEN hypervisor
> kernel. Then the system hang forever at the step "A start job is running
> for dev-disk-by\x2duuid-ebdeead6\x2d...". I have the screenshot. Can
> anyone tell me what is the problems? Are there any way to work around
> for that. Thanks alot. I am happy to give more details on the
> environment.

Firstly please note there is a forum dedicated to SUSE OpenStack
Cloud at https://forums.suse.com/forumdisplay.php?65-SUSE-OpenSta
ck-Cloud

I'm not sure I've understood your post so can I check my
interpretation - are you saying that your compute node is set up
with the Xen hypervisor or that you have a guest running on your
compute node in which you want to run Xen?

Can you post the screenshot somewhere then link here?

HTH.
--
Simon Flood
SUSE Knowledge Partner


----Android NewsGroup Reader----
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ducle
13-Dec-2017, 02:44
Hi,
As I said, my OpenStack Cloud 7 is up and running and we are using our cloud to provide VMs for people to do lab exercises(related to virtualization technologies like KVM,XEN,LXC...). The case is that, I have an instance of SLES 12 SP3, which is running on OpenStack Cloud 7. And I try to install XEN hypervisor on that instance. After installing XEN, the system ask to reboot to XEN kernel. I did reboot to the XEN kernel but it failed eventually. The instance shut down itself. So i tried to start it again and booted to XEN hypervisor kernel. Then the system hang forever at the step "A start job is running for dev-disk-by\x2duuid-ebdeead6\x2d...".
So my case is related to both XEN hypervisor and also OpenStack Cloud 7. My OpenStack Cloud 7 is already up and running and it is using KVM as it compute services.
Here is the screenshot on drive(https://drive.google.com/file/d/1vQS6YjwG0ikGuix-eA7HfSy6lDHdqqUs/view?usp=sharing). Thanks alot.

thsundel
13-Dec-2017, 09:39
Hi,
As I said, my OpenStack Cloud 7 is up and running and we are using our cloud to provide VMs for people to do lab exercises(related to virtualization technologies like KVM,XEN,LXC...). The case is that, I have an instance of SLES 12 SP3, which is running on OpenStack Cloud 7. And I try to install XEN hypervisor on that instance. After installing XEN, the system ask to reboot to XEN kernel. I did reboot to the XEN kernel but it failed eventually. The instance shut down itself. So i tried to start it again and booted to XEN hypervisor kernel. Then the system hang forever at the step "A start job is running for dev-disk-by\x2duuid-ebdeead6\x2d...".
So my case is related to both XEN hypervisor and also OpenStack Cloud 7. My OpenStack Cloud 7 is already up and running and it is using KVM as it compute services.
Here is the screenshot on drive(https://drive.google.com/file/d/1vQS6YjwG0ikGuix-eA7HfSy6lDHdqqUs/view?usp=sharing). Thanks alot.

I have not tried nested virtualization but you might need to do some extra steps to get it working: https://docs.openstack.org/devstack/latest/guides/devstack-with-nested-kvm.html or https://www.server-world.info/en/note?os=SUSE_Linux_Enterprise_12&p=kvm&f=8

Thomas

ducle
13-Dec-2017, 10:44
I have not tried nested virtualization but you might need to do some extra steps to get it working: https://docs.openstack.org/devstack/latest/guides/devstack-with-nested-kvm.html or https://www.server-world.info/en/note?os=SUSE_Linux_Enterprise_12&p=kvm&f=8

Thomas

Hi Thomas,
I have already enable nested virtualization feature on OpenStack. As a proof, I have already tried doing same thing with KVM and LXC and they worked perfectly.

thsundel
14-Dec-2017, 15:58
Hi Thomas,
I have already enable nested virtualization feature on OpenStack. As a proof, I have already tried doing same thing with KVM and LXC and they worked perfectly.

Looks somewhat similar to this: https://www.novell.com/support/kb/doc.php?id=7015462 take a look and see if multipath is enabled and if so try disable it.

Thomas

ducle
14-Dec-2017, 23:59
Looks somewhat similar to this: https://www.novell.com/support/kb/doc.php?id=7015462 take a look and see if multipath is enabled and if so try disable it.

Thomas

Hi, Thomas
My SLES12 is an instance on cloud with attached with only 1 volume so there is nothing to do with MPIO or multipath. Do you any more ideas?
Btw, @smflood what do you think?