Hi, I'm trying to use overlay to create temporary virtual root filesystem. I need a copy of / with custom files on top of it. To achieve that I used a simple mount like this: mount -t overlay overlay -o lowerdir=/,upperdir=/tmp/ov/upper,workdir=/tmp/ov/work /tmp/ov/virtual In /tmp/ov/virtual/ I can see my main filesystem and I can make temporary changes to it. Almost perfect! The problem are mounts. I have some standard ones: proc on /proc type proc (rw,nosuid,nodev,noexec,noatime) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,noatime) tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noatime) They are not visible in my virtual root: # ls -l /tmp/ov/proc/ # ls -l /tmp/ov/sys/ # ls -l /tmp/ov/tmp/ (all empty) Would that be possible to make overlayfs follow such mounts in lowerdir? -- Rafał
