NTP issues

dpearceFL

I have three hosts, all pointing to a single NTP server yet XOA says hosts 2 and 3 are not synchronized.

If I ssh into a host I see this:

# timedatectl
      Local time: Wed 2024-09-04 13:54:08 EDT
  Universal time: Wed 2024-09-04 17:54:08 UTC
        RTC time: Wed 2024-09-04 17:54:08
       Time zone: America/New_York (EDT, -0400)
     NTP enabled: yes
NTP synchronized: no
 RTC in local TZ: no
      DST active: yes
 Last DST change: DST began at
                  Sun 2024-03-10 01:59:59 EST
                  Sun 2024-03-10 03:00:00 EDT
 Next DST change: DST ends (the clock jumps one hour backwards) at
                  Sun 2024-11-03 01:59:59 EDT
                  Sun 2024-11-03 01:00:00 EST

Why is it not synchronized. Is it just a case of "you need to wait."

dpearceFL

@olivierlambert You are totally right. I 'thought' I had added a firewall rule to allow incoming NTP requests, but I added it again and reloaded and now all three hosts are syncing. Thanks!

olivierlambert

Hi,

To watch/check timesync, you need to use chrony commands. Eg chronyc tracking and chronyc sources.

dpearceFL

@olivierlambert All three hosts say this:

# chronyc tracking
Reference ID    : 00000000 ()
Stratum         : 0
Ref time (UTC)  : Thu Jan 01 00:00:00 1970
System time     : 0.000000000 seconds fast of NTP time
Last offset     : +0.000000000 seconds
RMS offset      : 0.000000000 seconds
Frequency       : 0.000 ppm slow
Residual freq   : +0.000 ppm
Skew            : 0.000 ppm
Root delay      : 1.000000000 seconds
Root dispersion : 1.000000000 seconds
Update interval : 0.0 seconds
Leap status     : Not synchronised

The XOA host says this:

# chronyc tracking
Reference ID    : AC1415FE (172.20.21.254)
Stratum         : 4
Ref time (UTC)  : Wed Sep 04 18:05:52 2024
System time     : 0.000297567 seconds slow of NTP time
Last offset     : -0.000314209 seconds
RMS offset      : 0.000475838 seconds
Frequency       : 9.984 ppm slow
Residual freq   : -0.001 ppm
Skew            : 0.408 ppm
Root delay      : 0.003664614 seconds
Root dispersion : 0.015663998 seconds
Update interval : 1040.9 seconds
Leap status     : Normal

Nothing seems off. Yet, XOA keeps saying "Host time and XOA time are not consistent with each other." I know that time sync is really important.

olivierlambert

All three hosts aren't sync, as you can see. Only XOA is. So you need to get your XCP-ng host to be sync and have a reachable NTP source. Check chrony sources command on them.

dpearceFL

@olivierlambert You are totally right. I 'thought' I had added a firewall rule to allow incoming NTP requests, but I added it again and reloaded and now all three hosts are syncing. Thanks!