[Openstack] Recovering VMs in OPenStack ESSEX

Narayanan, Krishnaprasad narayana at uni-mainz.de
Mon Nov 11 16:40:31 UTC 2013


Hi Razique,

I executed the start command on the compute node using the domain name option. I got an error message saying that
Error:"Failed to start domain instance-UUID"
Error: Unable to precreate char dev file '/var/lib/nova/instances/ instance-UUID/console.log: No such file or directory.

Can I get help to get rid of this problem?

Thanks,
Krishnaprasad
From: Razique Mahroua [mailto:razique.mahroua at gmail.com]
Sent: Montag, 11. November 2013 17:22
To: Narayanan, Krishnaprasad
Cc: openstack at lists.openstack.org
Subject: Re: [Openstack] Recovering VMs in OPenStack ESSEX

You have many solutions for that
first try to power it on via
$ virsh start
and check /var/log/libvritd.log

you can use kpartx to discover the partitions within the images, and use the different builtin system tools to fix the partitions
fsck.ext4/ xfs_adm, etc...


Razique

On 11 Nov 2013, at 04:14, Narayanan, Krishnaprasad <narayana at uni-mainz.de<mailto:narayana at uni-mainz.de>> wrote:


Hallo all,

I looked in to forums about recovering VMs in OpenStack ESSEX.  In the dashboard, I could see that the VMs status is "Hard rebooting" with power state Shutoff.  In virsh, I could see that the state is Shutoff. The complete process is taking longer time to finish and I assume it is in a unrecoverable state. Can anybody help me in recovering the data on the VM and the VM itself?

Thanks,
Krishnaprasad
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