On Thu, Jul 2, 2015 at 1:24 PM, Frank Steiner <fsteiner-ma...@bio.ifi.lmu.de > wrote:
> Hi, > > for our diskless clients I setup the network and the root fs in the > kernel/initrd and do two additional mounts in the initrd which are > specific for every client. > > I understand the boot concept with its dependencies and ordering but I've > no idea how to influence the shutdown process in two ways: > > 1. I want to keep the network running. To avoid problems with dependencies > I had to keep it enabled although all the stuff is done in the > kernel/initrd. > Thus, it shuts down during reboot and the diskless client hangs of > course. > > Changing the ExecStop to /usr/bin/true does work, but I wonder if there > is a better way in general to remove a process from the shutdown tree. > In SysV I just did "inserv -r network" in halt.local so that the > shutdown > link was removed before it would be considered. > > Is there something similar for systemd? "systemctl disable network" > didn't work. > No. Being an actual service manager, systemd keeps track _internally_ of which services are active at any moment. Filesystem changes won't affect that. (Messing around with service state was a bad idea in general, even with sysvinit.) If the 'main' network.service doesn't do anything anyway (since the network is already up), you can replace it entirely with Type=oneshot, ExecStart=/bin/true, RemainAfterExit=yes, essentially a service that does nothing at all (but still satisfies dependencies). (If you _actually_ meant "remove a process" instead of "remove a service", then yes, there are some other methods, such as KillMethod= or the "@" prefix [2]. But that isn't of much use for NFS, I think.) 2. The two additional NFS mounts should be kept active, too. There are no > *.mount files for them in /run/systemd/generator, because they are > mounted in the initrd I guess. > Not sure about this one. I wonder if the "shutdown initramfs" feature [1] would help here. [1]: http://www.freedesktop.org/wiki/Software/systemd/InitrdInterface/ [2]: http://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons/ -- Mantas Mikulėnas <graw...@gmail.com>
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