# DO NOT EDIT - This file is being maintained by Chef
+<% if node[:lsb][:release].to_f >= 22.04 -%>
+# Include configuration files found in /etc/chrony/conf.d.
+confdir /etc/chrony/conf.d
+<% end -%>
+
# Servers
<% node[:ntp][:servers].each do |server| -%>
pool <%= server %> iburst
<% end -%>
+# Add additional non-pool NTP servers
+# pool.ntp.org can sometimes be aggressive with KoD
+pool time.cloudflare.com iburst
+pool time.google.com iburst
+
+# Allow local queries for monitoring
+allow 127.0.0.1/32
+allow ::1/128
+
+# Run an initial NTP sync on daemon startup
+# Use a few IPs here to workaround DNSSEC failure if time is wrong: https://github.com/openstreetmap/operations/issues/654
+initstepslew 30 216.239.35.0 216.239.35.4 216.239.35.8 216.239.35.12 time.google.com time.cloudflare.com <%= node[:ntp][:servers].join(" ") %>
+
+<% if node[:lsb][:release].to_f >= 22.04 -%>
+# Use NTP sources found in /etc/chrony/sources.d.
+sourcedir /etc/chrony/sources.d
+<% end -%>
# This directive specify the location of the file containing ID/key pairs for
# NTP authentication.
# information.
driftfile /var/lib/chrony/chrony.drift
+<% if node[:lsb][:release].to_f >= 22.04 -%>
+# Save NTS keys and cookies.
+ntsdumpdir /var/lib/chrony
+<% end -%>
+
# Uncomment the following line to turn logging on.
#log tracking measurements statistics
# real-time clock. Note that it can’t be used along with the 'rtcfile' directive.
rtcsync
+<% if node[:virtualization][:role] == "guest" -%>
+# Allow anytime step on VM guests
+makestep 1 -1
+<% else -%>
# 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
+<% end -%>
-# Enable leap second smearing
-# Using recommended options
+# Enable leap second slew
leapsecmode slew
maxslewrate 1000
-smoothtime 400 0.001 leaponly
+
+# Enable hardware timestamps if available
+hwtimestamp *