Comment 6 for bug 1871189

Some small advice unrelated to the bug (I hope). In the log I attached above you can see where snapd creates "writable mimic" when it prints "create-writable-mimic" with a path. This entry is interesting:

utils.go:456: DEBUG: create-writable-mimic "/snap/microk8s/x1/var/lib"

The snap needs a writable mimic in $SNAP/var/lib/snapd/lib/gl - you can avoid that by putting a layout entry that mounts a tmpfs there explicitly.

layout:
  $SNAP/var/lib/snapd/lib/gl:
    type: tmpfs

In addition, ship $SNAP/va/rlib/snapd/lib/gl as an empty mount point in your snap, this will save a lot of redundant operations.