** Changed in: apt (Ubuntu)
Importance: Undecided => Low
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Title:
unattended upgrade ran one day after schedule
It seems systemd actually supports restarting oneshot services now, so
any options for timestamps will be removed (anything other than 0 will
behave as always), and systemd timers will have to be configured via
drop-ins instead. Finally.
That said, it seems a bit late for focal now.
Hmm, yeah, I
The thing is that it's only the delta that is handled in UTC not the
iso-8601-part so it will work just fine.
My first idé was to fix the interval calculations must like yours.
The workaround for us was to set interval to always. We have local
mirrors that can handle the load just fine even if
But if I live in UTC+11, I don't want it to run when the day has changed
in UTC+0?
As for date +%s being time zone dependent, hmm, I thought iso-8601
included a timezone, but it does not.
A workaround for DST that might work for non-1-day intervals could be to
change the length of a day to 22
The interesting about the code is that it always only treat the
timestamp of the file as "-MM-DD" and nothing else (this also
includes "now").
The code has functions for allowing the interval to be set down to 1s
but is does not mean anything to the outcome of the script as it always
looks
https://salsa.debian.org/apt-team/apt/-/merge_requests/115 implements
the proposed change for daily runs, and warns if intervals are
configured to anything other than 1 or 0 (and soon, always), telling
people to configure their systemd timer instead.
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** Tags removed: patch
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Title:
unattended upgrade ran one day after schedule
Status in apt package in Ubuntu:
Triaged
Oh but we have the other issue where we have more interval options than
systemd services. Sigh.
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Title:
unattended
It seems reasonable that setting TZ=UTC0 for date --iso-8601 could help
(as that's where a time zone is relevant, the +%s conversion it is not
relevant for).
But then this causes unwanted behaviour for people far off UTC, I guess,
so it's not a solution - It's entirely unclear to me whether a
Arguably, a workaround might be to remove support for the interval
options now, and then treat it as "one day", and just check that
%Y-%m-%d for today != the one for the stamp.
This addresses the problem with DST, and breaks every non-default
configuration. Which is something we will have to live
The attachment "apt.systemd.daily.diff" seems to be a patch. If it
isn't, please remove the "patch" flag from the attachment, remove the
"patch" tag, and if you are a member of the ~ubuntu-reviewers,
unsubscribe the team.
[This is an automated message performed by a Launchpad user owned by
I know that we can sometimes miss a beat so to say, but fixing this will
require fixing systemd to allow retrying of failed timer services, and
then removing the options for intervals inside of apt.
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I'm not convinced there is a bug here or that the patch actually fixes
it. We convert our times to Unix time stamps, which are independent of
time zones and DST.
The proposed patch should not be doing anything.
And no, we apt folks do not need or want a duplicate bug report in
Debian.
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Awesome work Magnus. Well done!
Since the bug is related to APT, is Debian then considered the upstream
of this source?
Would it be appropriate to also file a bug in their bug tracker? If so,
I can arrange that.
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** Patch added: "apt.systemd.daily.diff"
https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1824088/+attachment/5344224/+files/apt.systemd.daily.diff
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Setting TZ for the complete script will not work as it will make strange
behaviour if you are far away from UTC/GMT TZ. You can set it for just
the date command that returns the epoch time.
I did a patch that does that for the bionic version. It also applys
directly on Focal.
I attach the patch
How about this idea?
What if we add this line to the beginning of
usr/lib/apt/apt.systemd.daily:
export TZ="UTC0"
(I got this idea from the GNU Coreutils manual. See
https://www.gnu.org/software/coreutils/manual/html_node/Relative-items-
in-date-strings.html)
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If we look at lines 131 and 132 in /usr/lib/apt/apt.systemd.daily, we
will se the following:
interval="${interval%d}"
interval=$((interval*60*60*24))
I’m not 100% certain but I think that this time logic is what cause the
bug to occur, in accordance with what Magnus has pointed out in his
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: apt (Ubuntu)
Status: New => Confirmed
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It will not run after 36h either. It will not run until next day because
"yesterday" did not have 24 hours until next day.
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It's hardly and issue given that the script runs twice per day, which
compensates for that by running it after 36 hours instead of 24.
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Yes we know that the script does not necessarily run once a day, that's
not a surprise.
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Title:
unattended upgrade ran
This IS related to daylight saving.
The script: /usr/lib/apt/apt.systemd.daily check that the script is not
run twice at the same period.
The script checks the date of today and the date of the last timestamp to
determine the the diff.
The interval is calculated using the number of seconds per
** Attachment added: "Log data from apt"
https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1824088/+attachment/5254618/+files/history.txt
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