Open Stack

If the partition is part of a volume group you'll need to mount the  
device mapper part (if the VG is active):

# scan if the VG is recognized
vgs

# activate VG if necessary
vgchange -ay <VG_NAME>

# scan for logical volumes
lvs

# mount it
mount /dev/<VG_NAME>/<LV_NAME>  /mnt


It can get tricky if your own system's VG has the same name, I would  
try to avoid that.


Zitat von KK CHN <kkchn.in at gmail.com>:

> Members,
>
> We are in need of   migrating  of VMs from another vendor who has hosted
> all the VMs  on  their host machine using  KVM. hypervisor. No OpenStack
> they are using.
>
> We want to migrate these VMs to our fresh OpenStack Ussuri environment
> setup with two host machine which using KVM and Debian as Host Operating
> System.
>
> ( The VMs are  in RedHat,CentOS and Windows  machines )
>
> The vendor has provided each VM as Three files(qcow2 files). Because they
> are using additional disks for each partition.  They are telling us they
> can provide this way only. They are unable to provide as single file( I'm
> also not sure whether there is a way to get it as single file ? )
>
> The existing Vendor provides the files for each VM as follows.
>
> 1. First file is Operating Sytem ( CentOS) qcow2 image
>
> 2. Second file is Boot file system as qcow2 image.
>
> 3.  Third file is  data volume(LVM data  also qcow2 image)  : The data
> volume which contains the application data.
>
>
> When we are uploding these files to OpenStack glance using Horizon
> dashboard  the first two files  Operating Sytem and boot files are detected
> for the VM.   But the Third file unable to attach.  Its not detecting.
>
> So I tried manually mount the  data volume in command line but it throws
> error "unknown filesystem type 'LVM2_member'
>
> #mount /dev/vdc2 /mnt/
>
> mount:unknown filesystem type 'LVM2_member'      // here vdc2 is the data
> volume in question.
>
> // /dev/vda1 is the OS partion which when uploaded to glance through
> horizon no error in mounting. similarly  /dev/vdc1 the boot partion also
> able to attach through horizon dash board.
>
> Only the data volume is not getting attached and when manually tried to
> mount that volume /dev/vdc2 throws the error
>
>  "mount:unknown filesystem type 'LVM2_member'  "
>
>
> How to resolve this issue ? whats the root cause ?
>
>
> Kindly share your inputs .
>
>
> Thanks in advance
> Kris