zulip/puppet/zulip_ops/files/chrony.conf

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# Welcome to the chrony configuration file. See chrony.conf(5) for more
# information about usable directives.
# This will use the AWS local atomic clocks as a datasource; see
# https://aws.amazon.com/blogs/aws/keeping-time-with-amazon-time-sync-service/
server 169.254.169.123 prefer iburst minpoll 4 maxpoll 4
# 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 cant 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