[Bug 1703381] Re: ntpd does not restart after failing to start upon boot

[Andreas Hasenack]

Thanks for filing this bug in Ubuntu.

The logs you pasted showed ntp failing to run because something else was
listening on its socket already.

In xenial, there is a systemd service that also tries to keep the clock
accurate, called systemd-timesyncd.service. It has checks, though, to
not try to start if ntp is installed:

# systemctl status systemd-timesyncd
● systemd-timesyncd.service - Network Time Synchronization
   Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled)
  Drop-In: /lib/systemd/system/systemd-timesyncd.service.d
           └─disable-with-time-daemon.conf
   Active: inactive (dead)
Condition: start condition failed at Ter 2017-07-11 08:55:03 BRT; 7h ago
     Docs: man:systemd-timesyncd.service(8)

This is what is preventing systemd-timesyncd from running on my system, where I have ntp installed:
# cat /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf 
[Unit]
# don't run timesyncd if we have another NTP daemon installed
ConditionFileIsExecutable=!/usr/sbin/ntpd
ConditionFileIsExecutable=!/usr/sbin/openntpd
ConditionFileIsExecutable=!/usr/sbin/chronyd
ConditionFileIsExecutable=!/usr/sbin/VBoxService


Do you have that file /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf, and does it have the same content as above?

Can you show the output of "sudo systemctl status systemd-
timesyncd.service"?


Assuming you can reproduce the problem at will, could you please run this command right at the time where ntp has failed to start:

sudo fuser -v 123/udp


Thanks!


** Changed in: ntp (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1703381

Title:
  ntpd does not restart after failing to start upon boot

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