On Wed, 27 Feb 2019 14:05:03 +0100 Vincent Blut wrote: [...] > On Mon, Feb 25, 2019 at 10:07:28PM +0100, Francesco Poli wrote: [...] > >Nothing is added to /var/log/messages when chrony fails to start. > > Ok so I think I can reproduce this issue on a Debian Buster i386 virtual > machine. However, to double check that I’m facing the same issue as > yours, I’d like you to: > > - stop the chronyd daemon > # service chrony stop > > - install strace > # apt install strace > > - use the log directive in chrony.conf (“log measurements” alone > suffices to trigger the issue) > > - execute strace on chronyd > # strace -o chronyd_debug.txt chronyd -d -F -1 > > - don’t forget to attach the chronyd_debug.txt file when you answer ;-)
# strace -o /tmp/chronyd_debug.txt chronyd -d -F -1 2019-02-27T21:11:34Z chronyd version 3.4 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP +SCFILTER +SIGND +ASYNCDNS +SECHASH +IPV6 -DEBUG) 2019-02-27T21:11:34Z Frequency -63.045 +/- 0.023 ppm read from /var/lib/chrony/chrony.drift 2019-02-27T21:11:34Z Loaded seccomp filter Bad system call File chronyd_debug.txt is attached (gzipped). [...] > >So I tried to think about the differences between the box where it > >fails, and the box where it works. > > > >The first difference is the architecture: > > • the box where it fails is i386 > > Indeed, this is due to a missing syscall needed for this architecture > (and probably some other 32-bit plateforms) in the seccomp filter. Ah, that's it (maybe). > > > • the box where it works is amd64 > >However, I suspect that chrony level of abstraction is high enough to > >make this difference immaterial... Or am I wrong? > > See Above. OK, so I was wrong! ;-) > > >The second difference is the init system and might be more relevant: > > • the box where it fails runs with sysvinit as PID 1 > > • the box where it works runs with systemd as PID 1 > > I think it is safe to exclude PID 1 as the cause of this issue. Funny that I was completely off-track in the search for the relevant difference... :p > > Thanks for yout time, Thanks to you, for your helpfulness and patience! -- http://www.inventati.org/frx/ There's not a second to spare! To the laboratory! ..................................................... Francesco Poli . GnuPG key fpr == CA01 1147 9CD2 EFDF FB82 3925 3E1C 27E1 1F69 BFFE
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