Hi, I want to check if my local servers are sychronized with NTP servers. Can I use ntp collector? And can I use node_ntp_offset to know the offset between local servers' system clock and NTP servers
>From https://github.com/prometheus/node_exporter/blob/master/docs/TIME.md node_ntp_offset Clock offset <https://en.wikipedia.org/wiki/Network_Time_Protocol#Clock_synchronization_algorithm> between local time and NTPD time. ntp.org always sets NTPD time to local clock instead of relaying remote NTP time, so this offset is irrelevant for this NTPD. This value is used in sanity check as part of causality violation estimate. >From source code https://github.com/beevik/ntp/blob/master/ntp.go#L504 func offset(org, rec, xmt, dst ntpTime) time.Duration { // local clock offset // offset = ((rec-org) + (xmt-dst)) / 2 a := rec.Time().Sub(org.Time()) b := xmt.Time().Sub(dst.Time()) return (a + b) / time.Duration(2) } -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/497f01a8-22e1-4433-9491-0fa23a6fb4b8n%40googlegroups.com.
