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[ubuntu] KVM - Disk Path Help

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I have been researching virt-install's disk path option and how I should use it when installing a new KVM. I have been having some trouble getting my head around the concept. I have used VMWare in the past for virtualization and was expecting KVM to be similar in terms of host system files representing the KVM guest. Below is how I created my KVM and the issue I ran into.

I am installing Ubuntu Desktop on a Server host using virt-install. Soon after the install starts the LV that I am writing the virtual disk image to goes from 50G to 64Z. Impossible since the machine has only a single 1TB hard drive.

What is going on? I feel like I am trying to do something I'm not supposed to.


Install command


Code:

sudo virt-install -n desktop2 -r 1024 --disk path=/dev/ubuntu-vg/desktop2 -c ubuntu-14.04.2-desktop-amd64.iso --network network=default,model=virtio --graphics vnc,listen=0.0.0.0 --noautoconsole -v
Note that /dev/ubuntu-vg/deskop2 is formatted using ext4 and mounted to /mnt/kvm_mounts/desktop2

File system info shortly into Ubuntu ISO install


Code:

andrew@ubuntu:~$ df -T Filesystem Type          1K-blocks        Used          Available    Use% Mounted on
    /dev/mapper/ubuntu--vg-root      ext4          93976460        3140104            86039532  4% / none                                 
    /dev/mapper/ubuntu--vg-storage    ext4          361112164        200317276          142428424  59%    /mnt/storage
    /dev/mapper/ubuntu--vg-monitoring ext4          206293688        60668            195730876  1% /mnt/kvm_mounts/monitoring
    /dev/mapper/ubuntu--vg-desktop2  ext4    73786976294837252732 73786976294785830728  51405620 100% /mnt/kvm_mounts/desktop2

PVDisplay info of the HD


Code:

andrew@ubuntu:~$ sudo pvdisplay 
    --- Physical volume --- 
    PV Name    /dev/sda5 
    VG Name              ubuntu-vg 
    PV Size              931.27 GiB / not usable 4.00 MiB 
    Allocatable          yes         
    PE Size              4.00 MiB 
    Total PE              238405 
    Free PE              48165 
    Allocated PE          190240


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