diff --git a/overlay/etc/chrony/chrony.conf b/overlay/etc/chrony/chrony.conf new file mode 100644 index 0000000..ce4bfcd --- /dev/null +++ b/overlay/etc/chrony/chrony.conf @@ -0,0 +1,65 @@ +# Welcome to the chrony configuration file. See chrony.conf(5) for more +# information about usable directives. + +# Include configuration files found in /etc/chrony/conf.d. +confdir /etc/chrony/conf.d + +# This will use (up to): +# - 4 sources from ntp.ubuntu.com which some are ipv6 enabled +# - 2 sources from 2.ubuntu.pool.ntp.org which is ipv6 enabled as well +# - 1 source from [01].ubuntu.pool.ntp.org each (ipv4 only atm) +# This means by default, up to 6 dual-stack and up to 2 additional IPv4-only +# sources will be used. +# At the same time it retains some protection against one of the entries being +# down (compare to just using one of the lines). See (LP: #1754358) for the +# discussion. +# +# About using servers from the NTP Pool Project in general see (LP: #104525). +# Approved by Ubuntu Technical Board on 2011-02-08. +# See http://www.pool.ntp.org/join.html for more information. +pool ntp.ubuntu.com iburst maxsources 4 +pool 0.ubuntu.pool.ntp.org iburst maxsources 1 +pool 1.ubuntu.pool.ntp.org iburst maxsources 1 +pool 2.ubuntu.pool.ntp.org iburst maxsources 2 + +# Use time sources from DHCP. +sourcedir /run/chrony-dhcp + +# Use NTP sources found in /etc/chrony/sources.d. +sourcedir /etc/chrony/sources.d + +# This directive specify the location of the file containing ID/key pairs for +# NTP authentication. +keyfile /etc/chrony/chrony.keys + +# This directive specify the file into which chronyd will store the rate +# information. +driftfile /var/lib/chrony/chrony.drift + +# Save NTS keys and cookies. +ntsdumpdir /var/lib/chrony + +# Uncomment the following line to turn logging on. +#log tracking measurements statistics + +# Log files location. +logdir /var/log/chrony + +# Stop bad estimates upsetting machine clock. +maxupdateskew 100.0 + +# This directive enables kernel synchronisation (every 11 minutes) of the +# real-time clock. Note that it can’t be used along with the 'rtcfile' directive. +rtcsync + +# Step the system clock instead of slewing it if the adjustment is larger than +# one second, but only in the first three clock updates. +makestep 1 3 + +# Get TAI-UTC offset and leap seconds from the system tz database. +# This directive must be commented out when using time sources serving +# leap-smeared time. +leapsectz right/UTC + +# ET: Enable GPS as a time source +refclock SHM 0 refid GPS poll 4 precision 1e-3 offset 0.128 diff --git a/scripts/install-gps.sh b/scripts/install-gps.sh index ede7e4c..cdc28f5 100755 --- a/scripts/install-gps.sh +++ b/scripts/install-gps.sh @@ -2,9 +2,8 @@ # # Author : Gaston Gonzalez # Date : 1 October 2022 -# Updated : 4 October 2024 +# Updated : 6 October 2024 # Purpose : Configure GPS and time synch -set -e et-log "Installing GPS packages and dependencies..." apt install \ @@ -26,6 +25,5 @@ et-log "Disable automatic start of gpsd..." systemctl disable gpsd et-log "Updating chronyd to support GPS as a time source..." -echo "# ET: Enable GPS as a time source" >> /etc/chrony/chrony.conf -echo "refclock SHM 0 refid GPS poll 4 precision 1e-3 offset 0.128" >> /etc/chrony/chrony.conf +cp ../overlay/etc/chrony/chrony.conf /etc/chrony/ systemctl restart chronyd