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Thread: virt-p2v, clonezilla, or dd > disk.img

  1. #1
    Join Date
    May 2007
    NY's first capital
    Ubuntu 18.04 Bionic Beaver

    virt-p2v, clonezilla, or dd > disk.img


    I'd like to convert a physical server running an outdated version of Ubuntu.
    I'll be setting up an Ubuntu 20.04 running kvm/qemu hypervisor.

    I would like to convert the physical server so I can decomission the old
    hardware and keep the services running while I build a new VM to
    replace the outdated version of Ubuntu.... TMI I know!

    Anyway, has anyone had good luck running virt-ptv/virt-vtv in a live
    environment to convert a physical server to a VM on KVM?

    Did you use any specific live distro for the conversion?

    The pysical server has two physical disks (presented via hardware RAID controller)

    Disk 1:
    Disk /dev/sda: 80.0 GB, 80026361856 bytes
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *           1          32      248832   83  Linux
    Partition 1 does not end on cylinder boundary.
    /dev/sda2              32        9730    77899777    5  Extended
    /dev/sda5              32        9730    77899776   8e  Linux LVM
    root@cpdata:~# pvs
      PV         VG        Fmt  Attr PSize  PFree
      /dev/sda5  poweredge lvm2 a-   74.29g    0 
    root@cpdata:~# vgs
      VG        #PV #LV #SN Attr   VSize  VFree
      poweredge   1   2   0 wz--n- 74.29g    0 
    root@cpdata:~# lvs
      LV     VG        Attr   LSize  Origin Snap%  Move Log Copy%  Convert
      root   poweredge -wi-ao 70.30g                                      
      swap_1 poweredge -wi-ao  3.99g
    Disk 2:
    Disk /dev/sdb: 249.9 GB
       Device Boot      Start         End      Blocks   Id  System
    /dev/sdb1               1       30384   244056032+  83  Linux
    Some additional info if it helps:

    root@cpdata:~# df -h
    Filesystem            Size  Used Avail Use% Mounted on
                           70G   57G  9.1G  87% /
    none                  2.0G  196K  2.0G   1% /dev
    none                  2.0G     0  2.0G   0% /dev/shm
    none                  2.0G  2.5M  2.0G   1% /var/run
    none                  2.0G     0  2.0G   0% /var/lock
    /dev/sda1             228M  145M   71M  68% /boot
    /dev/sdb1             230G  186G   32G  86% /mnt/sdb1
    root@cpdata:~# blkid
    /dev/sda1: UUID="6eda98e8-97cd-4e43-9e40-e2ff9c46366c" TYPE="ext2" 
    /dev/sda5: UUID="zQy8xH-NN5r-tVKN-YTbS-3UyN-De6n-rAIIay" TYPE="LVM2_member" 
    /dev/mapper/poweredge-root: UUID="bace58f8-03f8-4b26-8e63-4a8441f2b18a" TYPE="ext4" 
    /dev/mapper/poweredge-swap_1: UUID="df18c186-e97b-43ca-9ab7-d78eadf52bb9" TYPE="swap" 
    /dev/sdb1: UUID="3f5ed8e1-3eef-474d-b128-b8adecf8251c" TYPE="ext4"
    I'm looking for advice on how to accomplish the conversion from physical
    machine to a virtual machine.

    What's your preferred method and why?
    I only saw a few posts when searching "virt-p2v".

    The instructions for virt-p2v seem straight forward enough. It
    just seems like a lot of "back-end magic" to make this work.

    I'm curious if my specific disk layout may cause issues.

    I've seen folks first create the disk image on the hypervisor host,
    but I don't see that as part of the official documentation linked above.

    EDIT: Actually I misread/misunderstood what this meant:
    "I used virt-p2v-make-disk on the server and created a USB"
    I see now that's how they created the "live environment/bootable image", yes?

    Thanks in advance.
    Last edited by volkswagner; August 8th, 2021 at 06:15 PM. Reason: make-disk meaning
    Nothing is ever easy, but if it is difficult you must be doing it wrong.

  2. #2
    Join Date
    Oct 2009
    Ubuntu 18.04 Bionic Beaver

    Re: virt-p2v, clonezilla, or dd > disk.img

    I've used clonezilla for that task since it'll only clone the used blocks. dd would take everything, so if there is a bunch of free space, clonezilla will likely be faster.

    I haven't used virt-p2v though, so that might be a better tool for the job, but I wouldn't know.
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    Tomorrow's an illusion and yesterday's a dream, today is a solution...

  3. #3
    Join Date
    Aug 2021

    Re: virt-p2v, clonezilla, or dd > disk.img

    I haven't tried this yet but want to... Have this bookmarked for when I do, hope it helps.


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