system clock weirdness

[stapelberg]

From my most recent boot:

2020/05/27 21:37:53 listeners.go:141: now listening on 127.0.0.1:80

The time being way off resulted in an update not succeeding:

2018/11/28 07:08:22 unhealthy after 39.59549534s: unhealthy: dhcp6: lease expired at 2018-11-28 07:28:03.860663142 +0100 CET

Note that the expiration timestamp is in the future.

Not sure what’s happening here. We’re setting the RTC in https://github.com/gokrazy/gokrazy/blob/2216841c80ef508f43b5b742ff423124f965f868/cmd/ntp/rtc.go

[stapelberg]

One possible theory is that the NTP client set the system time based on a misconfigured NTP pool server. Maybe we should always query 3 NTP servers and set the time only if 2 of them are within a 5s window of each other.