GPS - Fixed Chrony configuration

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

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
+cp ../overlay/etc/chrony/chrony.conf /etc/chrony/
-echo "refclock SHM 0 refid GPS poll 4 precision 1e-3 offset 0.128" >> /etc/chrony/chrony.conf
 systemctl restart chronyd