From 1b813272d996877ee36b2fd96ad2fbe95fe8f6cb Mon Sep 17 00:00:00 2001 From: Steven Baltakatei Sandoval Date: Mon, 12 Oct 2020 22:22:47 +0000 Subject: [PATCH] doc(time/README):Add working ntp.conf file and refs --- doc/time/README.org | 95 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 94 insertions(+), 1 deletion(-) diff --git a/doc/time/README.org b/doc/time/README.org index 7f84558..6ec544d 100644 --- a/doc/time/README.org +++ b/doc/time/README.org @@ -1,7 +1,7 @@ * Time This document was created by Steven Baltakatei Sandoval on ~2020-07-23T22:27Z~ under a [[https://creativecommons.org/licenses/by-sa/4.0/][Creative Commons BY-SA 4.0 license]]. It -was updated by Steven Baltakatei Sandoval on ~2020-07-25T19:34Z~ +was updated by Steven Baltakatei Sandoval on ~2020-10-12T22:22Z~ ** Development Task list *** Set up prototype unit **** DONE Solder wire for PPS signal @@ -13,6 +13,99 @@ was updated by Steven Baltakatei Sandoval on ~2020-07-25T19:34Z~ - [[https://gpsd.gitlab.io/gpsd/gpsd-time-service-howto.html][GPSD dev ref]] page for ~gpsd~ interfacing with ~ntp~. - [[https://raspberryautomation.com/connect-multiple-ds18b20-temperature-sensors-to-a-raspberry-pi/][Raspberry Autom]] article on specifying custom GPIO pin. *** Document prototype unit +**** TODO Integrate DHCP details from gregledet tutorial +http://www.gregledet.net/computers/building-a-stratum-1-ntp-server-with-a-raspberry-pi-4-and-adafruit-ultimate-gps-hat/ +**** TODO Note working ntp.conf file + +#+BEGIN_EXAMPLE +# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help + +driftfile /var/lib/ntp/ntp.drift +logfile /var/log/ntp.log + +# Leap seconds definition provided by tzdata +leapfile /usr/share/zoneinfo/leap-seconds.list + +# Enable this if you want statistics to be logged. +statsdir /var/log/ntpstats/ + +statistics loopstats peerstats clockstats +filegen loopstats file loopstats type day enable +filegen peerstats file peerstats type day enable +filegen clockstats file clockstats type day enable + + +# You do need to talk to an NTP server or two (or three). +#server ntp.your-provider.example +server time.nist.gov iburst minpoll 5 maxpoll 5 +server tick.usno.navy.mil iburst minpoll 5 maxpoll 5 +server 0.us.pool.ntp.org iburst minpoll 5 maxpoll 5 +server 0.us.pool.ntp.org iburst minpoll 5 maxpoll 5 +server 0.us.pool.ntp.org iburst minpoll 5 maxpoll 5 +server 0.us.pool.ntp.org iburst minpoll 5 maxpoll 5 + +# pool.ntp.org maps to about 1000 low-stratum NTP servers. Your server will +# pick a different set every time it starts up. Please consider joining the +# pool: +#pool 0.debian.pool.ntp.org iburst +#pool 1.debian.pool.ntp.org iburst +#pool 2.debian.pool.ntp.org iburst +#pool 3.debian.pool.ntp.org iburst + +# PPS Kernel mode +server 127.127.22.0 minpoll 4 maxpoll 4 true +fudge 127.127.22.0 flag3 1 refid kPPS + +# GPS PPS reference (NTP2) +server 127.127.28.2 minpoll 4 maxpoll 4 +fudge 127.127.28.2 refid SHM2 + +# GPS Serial data reference (NTP0) +server 127.127.28.0 minpoll 4 maxpoll 4 prefer +fudge 127.127.28.0 time1 +0.593 refid GPS + +# Fix False tickers +tos mindist 0.5 + +# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for +# details. The web page +# might also be helpful. +# +# Note that "restrict" applies to both servers and clients, so a configuration +# that might be intended to block requests from certain clients could also end +# up blocking replies from your own upstream servers. + +# By default, exchange time with everybody, but don't allow configuration. +restrict -4 default kod notrap nomodify nopeer noquery limited +restrict -6 default kod notrap nomodify nopeer noquery limited + +# Local users may interrogate the ntp server more closely. +restrict 127.0.0.1 +restrict ::1 + +# Needed for adding pool entries +restrict source notrap nomodify noquery + +# Clients from this (example!) subnet have unlimited access, but only if +# cryptographically authenticated. +#restrict 192.168.123.0 mask 255.255.255.0 notrust + + +# If you want to provide time to your local subnet, change the next line. +# (Again, the address is an example only.) +#broadcast 192.168.123.255 + +# If you want to listen to time broadcasts on your local subnet, de-comment the +# next lines. Please do this only if you trust everybody on the network! +#disable auth +#broadcastclient +#+END_EXAMPLE + +**** TODO Integreate References +- Some explanations for ~time1~, ~flag1~, ~flag3~, ~refid~, etc. strings in ntp.conf: [[http://doc.ntp.org/4.2.8/drivers/driver28.html][link]]. +- NTP Basics (what "system peer" means): [[https://kb.meinbergglobal.com/kb/time_sync/ntp/ntp_basics][link]]. +- GPSD guide indicating PPS signals should be preferred over GPS signals: [[https://gpsd.gitlab.io/gpsd/gpsd-time-service-howto.html#_feeding_ntpd_from_gpsd][link]] + ** Narrative The ~ninfacyzga-01~ device is equipped with an Ozzmaker BerryGPS-IMU module which provides time and location data to ~gpsd~. The time is -- 2.30.2