[systemd-devel] Cannot get Shutdown Script to Run (Libvirt Virtual Machine Shutdown)

[Andrei Borzenkov]

On Mon, Sep 22, 2014 at 7:40 AM, Alexander Groleau <awgneo at xbetanet.com> wrote:
> Hello systemd users,
>
> I have been trying desperately for weeks to get my simple shutdown script
> for a Libvirt guest to run before libvirtd is shut down, without success.
> Essentially, I need the libvirt-windows.sh script to run before the libvirtd
> service is terminated (which occurs right after systemd-logind outputs its
> reboot message). How can I get my script into this initial section of daemon
> shutdowns, at the top?
>
> Thanks so much. <3
>
> -Alex
>
> Here is my shutdown systemd service configuration:
>
> [Unit]
> Description=Stop Libvirt Windows Guest
> Documentation=man:libvirtd(8)
> Documentation=http://libvirt.org
> Before=shutdown.target
> DefaultDependencies=no
>

Why? Do you have special reasons to avoid default dependencies? What
are these reasons? I suggest removing it - it is always better to
start with default configuration before customizing it.

Also you do not specify any dependency to other services, so your
service and libvirtd service are stopped concurrently. To be stopped
before some other service it needs to be started *after* this service.
I.e.

After=your-virtd.service

> [Service]
> ExecStart=/usr/bin/libvirt-windows.sh stop

That's usually does not work, at least when using default
dependencies. During shutdown services are stopped. And you cannot
tell it to wait for starting one service before stopping another
service (I wish it could). So try

RemainAfterExit=true
ExecStop=/usr/bin/libvirt-windows.sh stop

Not sure if ExecStart is mandatory; if yes, just use /usr/bin/true.

> Type=oneshot
> StandardOutput=journal+console
>
> [Install]
> WantedBy=shutdown.target
>

No, you must start it on on boot for above stopping on shutdown to work, so use

WantedBy=default.target (or multi-user.target or graphical.target
depending on your configuration)

> Here is my journalctl log:
>
> Sep 21 23:14:53 Xerxes9 systemd-logind[340]: System is rebooting.
> Sep 21 23:14:53 Xerxes9 libvirtd[605]: End of file while reading data:
> Input/output error // HERE IS LIBVIRTD TERMINATING
> Sep 21 23:14:53 Xerxes9 systemd[1]: Failed to reset devices.list on
> /system.slice: Invalid argument
> Sep 21 23:14:53 Xerxes9 bluetoothd[458]: Terminating
> Sep 21 23:14:53 Xerxes9 avahi-daemon[335]: Got SIGTERM, quitting.
> Sep 21 23:14:53 Xerxes9 ntpd[606]: ntpd exiting on signal 15 (Terminated)
> Sep 21 23:14:53 Xerxes9 avahi-daemon[335]: Leaving mDNS multicast group on
> interface virbr0.IPv4 with address 192.168.122.1.
> Sep 21 23:14:53 Xerxes9 ModemManager[338]: <info>  Caught signal, shutting
> down...
> Sep 21 23:14:53 Xerxes9 avahi-daemon[335]: Leaving mDNS multicast group on
> interface br0.IPv4 with address 192.168.1.2.
> Sep 21 23:14:53 Xerxes9 NetworkManager[334]: <info> ModemManager disappeared
> from bus
> Sep 21 23:14:53 Xerxes9 bluetoothd[458]: Stopping SDP server
> Sep 21 23:14:53 Xerxes9 bluetoothd[458]: Exit
> Sep 21 23:14:53 Xerxes9 ModemManager[338]: <info>  ModemManager is shut down
> Sep 21 23:14:53 Xerxes9 avahi-daemon[335]: avahi-daemon 0.6.31 exiting.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopping Default.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopped target Default.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopping Basic System.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopped target Basic System.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopping Paths.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopped target Paths.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopping Timers.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopped target Timers.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopping Sockets.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Stopped target Sockets.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Starting Shutdown.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Reached target Shutdown.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopping Default.
> Sep 21 23:14:53 Xerxes9 systemd[681]: Starting Exit the Session...
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopped target Default.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopping Basic System.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopped target Basic System.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopping Paths.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopped target Paths.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopping Timers.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopped target Timers.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopping Sockets.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Stopped target Sockets.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Starting Shutdown.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Reached target Shutdown.
> Sep 21 23:14:53 Xerxes9 systemd[419]: Starting Exit the Session...
> Sep 21 23:14:53 Xerxes9 systemd[419]: Received SIGRTMIN+24 from PID 1202
> (kill).
> Sep 21 23:14:53 Xerxes9 systemd[681]: Received SIGRTMIN+24 from PID 1197
> (kill).
> Sep 21 23:14:53 Xerxes9 systemd[682]: pam_unix(systemd-user:session):
> session closed for user awgneo
> Sep 21 23:14:53 Xerxes9 systemd[420]: pam_unix(systemd-user:session):
> session closed for user lightdm
> Sep 21 23:14:53 Xerxes9 systemd[1]: pulseaudio.service: main process exited,
> code=exited, status=1/FAILURE
> Sep 21 23:14:53 Xerxes9 systemd[1]: Unit pulseaudio.service entered failed
> state.
> Sep 21 23:14:53 Xerxes9 libvirt-windows.sh[1195]: error: failed to connect
> to the hypervisor  // HERE IS MY SCRIPT FAILING
> Sep 21 23:14:53 Xerxes9 libvirt-windows.sh[1195]: error: Failed to connect
> socket to '/var/run/libvirt/libvirt-sock': No such file or directory
> ...
>
>
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