Le jeu. 10 févr. 2022 à 11:49, Ulrich Windl <ulrich.wi...@rz.uni-regensburg.de> a écrit : > > >>> Lennart Poettering <lenn...@poettering.net> schrieb am 10.02.2022 um 11:31 > in > Nachricht <YgTpdVFRgL+uQoY9@gardel-login>: > > On Mi, 09.02.22 22:05, Etienne Champetier (champetier.etie...@gmail.com) > > wrote: > > > >> Hello systemd hackers, > >> > >> After flashing the firmware of some pcie card I need to power cycle > >> the server to finish the flashing process. > >> For now I have a simple script in lib/systemd/system-shutdown/ running > >> "ipmitool power cycle" but I would like to make sure it runs after > >> other scripts like fwupd.shutdown or mdadm.shutdown > >> > >> Is there any way to have systemd cleanly power cycle my server instead > >> of rebooting it ? > > > > What does "power cycle" entail that "reboot" doesnt? i.e. why doesn't > > "systemctl reboot" suffice? > > My guess is that some smart cards with their own firmware and CPu do not > reboot unless they are power cycled, so maybe if the firmware upgrade on the > card does not force it to reboot, it my need a power cycle. > > > > > /usr/lib/systemd/system-shutdown/ drop-ins are executed before the OS > > transitions back into the initrd — the initrd will then detach the > > root fs (i.e. undo what it attached at boot) and actually reboot. This > > means if your command turns off the power source you should stick it > > in the initrd's shutdown logic, and not into > > /usr/lib/systemd/system-shutdown/. If you are using RHEL this means > > into dracut. But adding it there is something to better discuss with > > the dracut community than here. > > My guess is that it would be handled best by some special GRUB boot menu entry > (like "boot 'power cycle' once).
This is pretty clean but it means going through "BIOS" init twice which can be pretty long on physical servers Etienne > Regards, > Ulrich > > > > > Lennart > > > > -- > > Lennart Poettering, Berlin
