Bug#803373: systemd: fail to enable/disable services that have no LSB init script

[Martin Pitt]

Control: tag -1 moreinfo unreproducible

Hello Luca,

Luca Bruno [2015-10-29 12:29 +0100]:
> I've put a simple service in /lib/systemd/system. Doing systemctl
> start/stop on this service works correctly, however enable/disable
> doesn't work: "Failed to execute operation: No such file or directory".

Did you systemctl daemon-reload after placing the file there? What's
the exact file name you are adding and which command do you run? Does
this involve Alias= or templates? Does your file perhaps refer to a
nonexisting WantedBy= or RequiredBy=?

I tried to reproduce this here:

# cat << EOF > /lib/systemd/system/foo.service
[Unit]
Description=test
[Service]
Type=oneshot
ExecStart=/bin/echo hello
[Install]
WantedBy=multi-user.target
EOF
# systemctl daemon-reload
# systemctl enable foo.service
Created symlink from /etc/systemd/system/multi-user.target.wants/foo.service to /lib/systemd/system/foo.service.

So all as expected. I'm afraid we need a more detailled reproducer.

> The reason is that my systemd service has no LSB init script.

That should be fine. We do call update-rc.d *if* there is an LSB init
script, but we have plenty of units even in a default install which
don't have one (e. g. hwclock-save.service).

> By doing a touch /etc/init.d/servicename then enable/disable works,
> though update-rc.d will spit out some warning.

Interesting. So somehow your new unit thinks there is a SysV init
script and tries to call update-rc.d.

> I can see this behaviour only on debian, so pretty sure it must caused
> by one of the 200+ patches.

The vast majority of them are actually ones from 215-stable and
cherry-picked ones from newer upstream versions, it's not actually
that bad.

Do you have a chance to try this under testing/unstable? The whole
SysV init script handling got dramatically simplified there.

Thanks,

Martin

-- 
Martin Pitt                        | http://www.piware.de
Ubuntu Developer (www.ubuntu.com)  | Debian Developer  (www.debian.org)