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assisi / systemd-timesyncd-wait

A systemd service that enters the finished state only when systemd-timesyncd successfully synchronizes the time and date with an NTP server.
Apache License 2.0
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readme

The functionality provided on this repo was finally implemented on Systemd with "systemd-time-wait-sync"

https://github.com/systemd/systemd/issues/5097

Proper time-sync.target support for systemd-timesyncd

This package essentially just works around https://github.com/systemd/systemd/issues/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 block until it sees a message indicating that systemd-timesyncd has synchronized the time.

Requirements

go > 1.4
make

Installation

Clone the repo and execute:

make && make install