How to troubleshoot the issue involving chrony?
Looking at the output of chrony sources, that question mark (?), in the 'S' column,
indicates that connectivity to the source on this line has been lost.
With the chrony logs showing no errors, and the service (chronyd) is active and
running, this is an indication that chrony is currently functioning as intended, and
successfully synchronizing the system with its configured time sources. However,
time synchronization issues may be occuring due to network connectivity challenges,
or incorrect time server configurations in the chrony settings.
To locate the issue as to why connectivity to the time sources have been lost, along
with why time sync challenges may be occuring, investigate the following:
Verify time source accuracy:
Check if the time servers listed in the chrony configuration are reliable and
accessible from your system.
Network connectivity:
Ensure the system has a stable Internet connection to reach the time servers.
Firewall settings:
Check if a firewall is blocking UDP traffic on port 123; this is used for NTP communication.
Chrony configuration:
Review your /etc/chrony file to confirm the correct time servers and settings are used.
Check for recent system changes:
If the issue started recently, review any recent system updates or configuration
changes that might have impacted chrony.
With all 8 of those time sources showing a question mark (?) in the "S" column,
this suggest to me that there is a reachability problem. So, I'm going to start by
taking a look any firewall(s) to ensure that UDP traffic on port 123 is not somehow
being interferred with.
Trevor "Red Hat Evangelist" Chandler
