[Bug 1849156] Re: systemd-timesyncd.service broken on upgrade to 19.10 if ntp was installed

[Christian Ehrhardt ]

Debian MP is merged at the end of last Week.
It is in 245.4-2 in debian/unstable since Saturday.
It is not yet in 245.2-1ubuntu3 which is the current focal-proposed.

I was working on bug 1870144 and considering to modify timesyncd there,
but seeing this change coming I'll (on the chrony side) only fix the
tests but leave this upload to systemd.

@Rbalint - please let me know if you expect this to not land in time for 20.04.
Because then I need to have chrony stopping systemd-timesyncd on install to avoid both are running concurrently.

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Title:
  systemd-timesyncd.service broken on upgrade to 19.10 if ntp was
  installed

Status in ntp package in Ubuntu:
  Confirmed
Status in systemd package in Ubuntu:
  In Progress
Status in ntp source package in Eoan:
  Confirmed
Status in systemd source package in Eoan:
  Confirmed
Status in ntp source package in Focal:
  Confirmed
Status in systemd source package in Focal:
  In Progress

Bug description:
  Ubuntu 19.10's systemd package introduced /lib/systemd/system/systemd-
  timesyncd.service.d/disable-with-time-daemon.conf.  This prevents
  systemd-timesyncd.service from starting if the ntp package has been
  installed.  However, ntp.service has a Conflicts directive for
  systemd-timesyncd.service.  If both services are enabled, neither will
  start on boot.  This breaks upgrades from < 19.10 to 19.10 for systems
  that have both ntp and systemd installed.

  Possible workarounds:

  - Uninstall ntp
  - Disable systemd-timesyncd.service

  % lsb_release -rd
  Description:    Ubuntu 19.10
  Release:        19.10

  % apt-cache policy systemd
  systemd:
    Installed: 242-7ubuntu3
    Candidate: 242-7ubuntu3
    Version table:
   *** 242-7ubuntu3 500
          500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu eoan/main amd64 Packages
          100 /var/lib/dpkg/status

  % apt-cache policy ntp
  ntp:
    Installed: 1:4.2.8p12+dfsg-3ubuntu2
    Candidate: 1:4.2.8p12+dfsg-3ubuntu2
    Version table:
   *** 1:4.2.8p12+dfsg-3ubuntu2 500
          500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu eoan/universe amd64 Packages
          100 /var/lib/dpkg/status

  % dpkg -S /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf
  systemd: /lib/systemd/system/systemd-timesyncd.service.d/disable-with-time-daemon.conf

  % sudo systemctl status ntp
  ● ntp.service - Network Time Service
     Loaded: loaded (/lib/systemd/system/ntp.service; enabled; vendor preset: enabled)
     Active: inactive (dead)
       Docs: man:ntpd(8)

  % sudo systemctl status systemd-timesyncd.service
  ● 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 Mon 2019-10-21 12:05:38 EDT; 29s ago
       Docs: man:systemd-timesyncd.service(8)

  Oct 21 12:05:38 ubuntu systemd[1]: Condition check resulted in Network
  Time Synchronization being skipped.

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