Provided by: dracut-core_044+3-3_i386 bug

NAME

       dracut-shutdown.service - unpack the initramfs to /run/initramfs

SYNOPSIS

       dracut-shutdown.service

DESCRIPTION

       This service unpacks the initramfs image to /run/initramfs. systemd
       pivots into /run/initramfs at shutdown, so the root filesytem can be
       safely unmounted.

       The following steps are executed during a shutdown:

       ·   systemd switches to the shutdown.target

       ·   systemd starts
           /lib/systemd/system/shutdown.target.wants/dracut-shutdown.service

       ·   dracut-shutdown.service executes
           /usr/lib/dracut/dracut-initramfs-restore which unpacks the
           initramfs to /run/initramfs

       ·   systemd finishes shutdown.target

       ·   systemd kills all processes

       ·   systemd tries to unmount everything and mounts the remaining
           read-only

       ·   systemd checks, if there is a /run/initramfs/shutdown executable

       ·   if yes, it does a pivot_root to /run/initramfs and executes
           ./shutdown. The old root is then mounted on /oldroot.
           /usr/lib/dracut/modules.d/99shutdown/shutdown.sh is the shutdown
           executable.

       ·   shutdown will try to umount every /oldroot mount and calls the
           various shutdown hooks from the dracut modules

       This ensures, that all devices are disassembled and unmounted cleanly.

       To debug the shutdown process, you can get a shell in the shutdown
       procedure by injecting "rd.break=pre-shutdown rd.shell" or
       "rd.break=shutdown rd.shell".

           # mkdir -p /run/initramfs/etc/cmdline.d
           # echo "rd.break=pre-shutdown rd.shell" > /run/initramfs/etc/cmdline.d/debug.conf
           # touch /run/initramfs/.need_shutdown

AUTHORS

       Harald Hoyer

SEE ALSO

       dracut(8)