Chrony configuration file to sync the system timestamp with host server's timestamp. For more details visit https://amalgjose.com

chrony.conf

apt-get update
apt-get install chrony -y

cp -pr /etc/chrony/chrony.conf /etc/chrony/chrony.conf.bk
vim /etc/chrony/chrony.conf

=========================chrony.conf==============================

# Welcome to the chrony configuration file. See chrony.conf(5) for more
# information about usuable directives.



# 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



# 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



# 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
# Settings come from: https://docs.microsoft.com/en-us/azure/virtual-machines/linux/time-sync
refclock PHC /dev/ptp0 poll 3 dpoll -2 offset 0
makestep 1.0 -1
===================================================================


systemctl restart chrony

chronyc tracking