Notice: The latest versions of systemd in git (after v238) have systemd-time-wait-sync.service; presumably it will be present in systemd-239. If you have systemd v239 or greater, you should use systemd-time-sync-wait instead.
Proper time-sync.target support for systemd-timesyncd
This package essentially just works around systemd/systemd#5097
systemd.special(7) tells us that "All services where correct time is essential should be ordered after [time-sync.target]". However, systemd-timesyncd allows time-sync.target to be reached before timesyncd has actually synchronized the time. This is because it sends READY=1 as soon as the daemon has initialized, rather that waiting until it has successfully synchronized to an NTP server.
It would be trivial to patch timesyncd to wait, but that would introduce some other problems.
So, I'm introducing systemd-timesyncd-wait. It is a service that listens for messages from systemd-timesyncd, and blocks until it sees a message indicating that systemd-timesyncd has synchronized the time.
To compile systemd-timesyncd-wait, you will need the following
- Go >= 1.4
- GNU Make
The only run-time dependencies are systemd (obviously), and the rm
program.
To install, simply grab a copy of the repo, and run make install,
with any configuration options specified as arguments:
make prefix=/usr install
Of course, the desired value prefix= depends on your system. Arch
and Parabola users will be most happy with prefix=/usr,
Ubuntu Xenial users will want to set prefix=/.