Mounting / Unmounting KVM Image: Difference between revisions
From Leo's Notes
This page was last edited on 21 May 2013, at 18:41.
Created page with "Suppose you have a KVM virtual machine using a virtual disk located in a LV group. To gain access to the data, use <code>kpartx</code>. To list partitions in the disk image:..." |
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To map the parititions: | To map the parititions: | ||
# kpartx -av /dev/ | # kpartx -av /dev/vol_vm1/kvm101_img | ||
add map vol_vm1-kvm101_img1 (253:6): 0 61861441 linear /dev/vol_vm1/kvm101_img 63 | add map vol_vm1-kvm101_img1 (253:6): 0 61861441 linear /dev/vol_vm1/kvm101_img 63 | ||
add map vol_vm1-kvm101_img2 (253:7): 0 1048576 linear /dev/vol_vm1/kvm101_img 61861504 | add map vol_vm1-kvm101_img2 (253:7): 0 1048576 linear /dev/vol_vm1/kvm101_img 61861504 | ||
Revision as of 18:41, 21 May 2013
Suppose you have a KVM virtual machine using a virtual disk located in a LV group. To gain access to the data, use kpartx.
To list partitions in the disk image:
# kpartx -l /dev/vol_vm1/kvm101_img vol_vm1-kvm101_img1 : 0 61861441 /dev/vol_vm1/kvm101_img 63 vol_vm1-kvm101_img2 : 0 1048576 /dev/vol_vm1/kvm101_img 61861504
Knowing that the first partition is / and the second is the swap, we will attempt to mount the first partition.
To map the parititions:
# kpartx -av /dev/vol_vm1/kvm101_img add map vol_vm1-kvm101_img1 (253:6): 0 61861441 linear /dev/vol_vm1/kvm101_img 63 add map vol_vm1-kvm101_img2 (253:7): 0 1048576 linear /dev/vol_vm1/kvm101_img 61861504
To mount the newly mapped partitions:
# mount -t ext4 -o ro /dev/mapper/vol_vm1-kvm101_img1 /mnt/vm101
Once completed, simply unmount and unmap the image:
# umount /mnt/vm101 # kpartx -d /dev/vol_vm1/kvm101_img