Public bug reported:
The unit /lib/systemd/system/ifup@.service is Debian and Ubuntu specific, it's
not part of upstream systemd.
On shutdown, it unconditionally ifdowns all interfaces:
ExecStop=/sbin/ifdown %I
This is a regression from previous init systems (sysvinit and upstart)
which cared so that when a network file system was in use, they didn't
ifdown the interfaces.
Specifically, both /etc/init.d/networking and /etc/init/networking contain
these functions:
check_network_file_systems()
check_network_swaps()
which output the message "not deconfiguring network interfaces: network file
systems still mounted" and exit.
So, please call the same functions in the ExecStop= part of
ifup@.service.
** Affects: ltsp (Ubuntu)
Importance: Undecided
Status: New
** Affects: systemd (Ubuntu)
Importance: Undecided
Assignee: Martin Pitt (pitti)
Status: New
** Also affects: ltsp (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1492546
Title:
Systemd runs ifdown on shutdown even when it shouldn't
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