Later to be combined in SRU Template Reasoning - snippest updated from
my old commit log to be readable here in the bug:
Cases of the codepath (Ubuntu Delta) that we intent to remove:
Case 1 - bug that it meant to fix initially:
- ntpd comes up and can not find peers to associate with
- an interface comes up
- stop ntpd
- sync time once with ntpdate-debian
- (re-)start ntpd (now able to find its peers, but it will throw away what
ntpdate just has set, so not worth)
Case 2 - more common case:
- ntpd comes up normally
- the admin brings interfaces up/down rather often
- ntp is restarted very very often due to this for no reason
=> That behavior is close to a bug on its own, which is the reason for
bugs like https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=823533
Case 3 - still more common
- ntpd is installed but disabled (for whatever reason)
- all is fine on any ifup/down
- one installs ntpdate, maybe even without realizing due to a depends
- now on the next ifup ntpd (or openntpd) will be started
By dropping this section we fix it for Case 2 and Case 3.
Users of Case 1 still have no impact - their call to ntpdate will refuse to
change things as there is a running ntp.
Like:
$ /usr/sbin/ntpdate-debian
20 Jun 08:02:32 ntpdate[519]: the NTP socket is in use, exiting
And as outlined in Case 1 the running ntp would resync over it anyway.
If there was nothing running at all - well then the sync works and things are
fine still.
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https://bugs.launchpad.net/bugs/1593907
Title:
ntpdate startup routine prevents ntp service from launching up on
Ubuntu 16.04 server on system boot; manually starting ntp service
works: [FIX in DESCRIPTION], just need to apply it and release a new
version
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