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====== Resizing opnSense virtual ======

Steps are mostly as follows

  - shutdown the vm & snapshot or back up image
  - resize the disk image. NOTE: must be larger to retain contents. Use one of the following, depending on where the disk image is stored
    - truncate -s 10G target.img # local image as a file
    - lvextend -L 10G /dev/vgname/lvname # an LVM volume
    - zfs set quota=10G storage/target # a ZFS volume
  - boot up resized opnsense
  - Find  <code bash>gpart show               #Show all to select the correct target drive
gpart show vtbd0         #Will likely show a corrupted GPT ....
gpart recover vtbd0      #Repair the "corrupted" GPT
gpart show vtbd0         #Show again to verify and find the partition we're interested in</code>
   - This will show something similar to the following<file>=>      40  20971440  vtbd0  GPT  (10G)
        40    532480      1  efi  (260M)
    532520      1024      2  freebsd-boot  (512K)
    533544  20437936      3  freebsd-ufs  (9.7G)</file>
   - Now, resize the partition<code bash>gpart resize -i 3 vtdb0  #Resize the freebsd-ufs partition (free space MUST be below the partition)
gpart show vtbd0         #Verify resize is what we expect
growfs /dev/gpt/rootfs   #Grow the filesystem
fsck -y /dev/gpt/rootfs  #Force a filesystem check/repair</code>
   - df should now show expanded file space -- reboot for good measure

  * https://unixcop.com/how-to-resize-and-growing-disks-in-freebsd/