thanks for the info @gpatel-fr
I got the value “criu.enable” from this post: Is live migration with snap installed lxd 3.0.1 possible?
I tried setting both criu.enable and criu.enabled, restarted, and no dice.
...:~$ sudo snap set lxd criu.enabled=true
...:~$ sudo snap get lxd criu
Key Value
criu.enable true
criu.enabled true
...:~$ systemctl reload snap.lxd.daemon
...:~$ lxc snapshot dev-dwk --stateful
Error: Unable to create a stateful snapshot. CRIU isn't installed
regarding this suggestion: sudo cat /proc/16688/environ
to check the environment (forgive the stupid question), which process do I target? htop shows a number of processes referring to LXD, so wasn’t quite sure which one to look at.