This is really just stuff we forget how to do and want to keep around. Hopefully it helps anyone else vis the magic of search results.
Compress VDISK for WSL2 Instance in DISKPART
In powershell:
wsl.exe --list --verbose
If the WSL in question is running, stop it, e.g.:
wsl.exe --terminate 'Ubuntu'
Locate the package directory for your WSL2 instance in your user folder in \AppData\Local\Packages\
.
Look for the vendor:
WhitewaterFoundryLtd.Co
for PengwinCanonicalGroupLimited
for UbuntuTheDebianProject
for Debian- etc
The VHDX is in the LocalState
subdirectory.
Then in DISKPART:
DISKPART> select vdisk file="C:\Users\kk\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu_79rhkp1fndgsc\LocalState\ext4.vhdx"
DiskPart successfully selected the virtual disk file.
DISKPART> compact vdisk
100 percent completed
DiskPart successfully compacted the virtual disk file.