Leapp Upgrade Messages About Unmounted /proc File System
Warning messages are displayed in the package installation logs during Leapp preupgrade and
Leapp
upgrade:
/proc/ is not mounted. This is not a supported mode of operation. Please fix your invocation environment to mount /proc/ and /sys/ properly. Proceeding anyway. Your mileage may vary.
During upgrade /proc is mounted in a temporary chroot as part of the
preparation for the upgrade rootfs. This process is normal and the warning messages aren't
indicative of any real problem. You can ignore warning messages about the
/proc file system.
(Bug ID 36512929)