Virt-resize

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virt-resize - Resize a virtual machine disk https://linux.die.net/man/1/virt-resize

Example[edit]

Reference: http://wiki.docking.org/index.php/To_resize_a_virtual_drive

Overview: qemu-img resize -> virt-resize -> (Check virt-filesystems) -> lvextend --resizefs


0) Backup 
cp my_machine.qcow2 my_machine-ORIGIN.qcow2 (progress -m to track status)
1) qemu-img resize image_name.qcow2 +3G
2) Resize:
virt-resize --expand /dev/sda4 my_machine-ORIGIN.qcow2 my_machine-DESTINATION.qcow2
3) Verify name of your devices you can use:
virt-filesystems --partitions --long -a VM_NAME.qcow2
4) lvextend --resizefs or fdisk
5) Start your machine: virsh start VM_NAME and discard your backups if everything is working properly.


Virt-resize execution with errors[edit]

Failed to get "write" lock[edit]

virt-resize: error: libguestfs error: guestfs_launch failed.
This usually means the libguestfs appliance failed to start or crashed.
Do:
  export LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1
and run the command again.  For further information, read:
  http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs
You can also run 'libguestfs-test-tool' and post the *complete* output
into a bug report or message to the libguestfs mailing list.

If reporting bugs, run virt-resize with debugging enabled and include the
complete output:

  virt-resize -v -x [...]


After debugging: 
 qemu-system-x86_64: -drive file=/path/to/image/VM_NAME.qcow2,cache=unsafe,id=hd1,if=none: 
 Failed to get "write" lock
 Is another process using the image?

partition not found in the source disk image[edit]

libguestfs: trace: lvs = []
libguestfs: trace: canonical_device_name "/dev/vdb1"
libguestfs: trace: canonical_device_name = "/dev/sdb1"
virt-resize: error: /dev/sdb1: partition not found in the source disk image
(this error came from '--expand' option on the command line).  Try running
this command: virt-filesystems --partitions --long -a
VM_NAME.qcow2

No such file or directory[edit]

virt-resize --expand /dev/sda1 IMAGE.qcow2 IMAGE-DST.qcow2
[   0.0] Examining IMAGE.qcow2
virt-resize: error: libguestfs error: IMAGE-DST.qcow2: No such file or directory

If reporting bugs, run virt-resize with debugging enabled and include the
complete output:

 virt-resize -v -x [...]

Related commands[edit]

Activities[edit]

See also[edit]