[systemd-devel] systemctl [en|dis]able weirdness + reload (writes /run/nologin)

[Colin Guthrie]

'Twas brillig, and Colin Guthrie at 13/01/14 11:30 did gyre and gimble:
> 'Twas brillig, and Colin Guthrie at 13/01/14 11:16 did gyre and gimble:
>> 2. This is the much odder part of the problem I'm seeing. The call to
>> daemon_reload() at the end of the enable_unit() seems to trigger some
>> kind of broken daemon reload that puts things into a bad state,
>> including a stale /run/nologin file.
>>
>> I'm not sure WHY this does this, but it's very reliably reproducible. I
>> have a native sysvinit script called numlock. All I need to do to
>> trigger the bad state is "systemctl disable numlock". After the call,
>> the systemd daemon is reloaded and it goes into this bad state
>> completely with /run/nologin file.
>>
>> If I comment out call or use --no-reload, then all is well. If I call
>> "systemctl daemon-reload" on it's own, all seems well. It just seems to
>> be this reload call specifically at the end of enable_unit() that
>> triggers the bad state.
>>
>>
>>
>> I'm going to try reverting some of the patches I have applied to see
>> where I get with things, as I see Zbigniew backed a few out of fedora
>> due to freeze rules, but I did also see some threads from Zbigniew about
>> the whole /run/nologin, so I suspect he may be interested in this.
> 
> I reverted the same patches that were reverted in Fedora so our builds
> should be quite similar.
> 
> I really hope fedora has this same issue otherwise my debugging just got
> more confusing.
> 
> Zbigniew can you reproduce this on F20?

It seems to be specifically related to chkconfig. If I shell out instead
to something different (e.g. "whoami") all runs fine.

I'm wondering if it's something related to semi-systemd stuff supported
in our chkconfig... Perhaps our patches are out of date compared to
fedora...

Still hunting :)


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Colin Guthrie
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http://colin.guthr.ie/

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