blocks|key|203360|text|我为集群设置了一个额外的时间服务器。集群中的客户机现在每秒钟与时间服务器同步一次。自那时以来，这一问题一直没有发生。我想问题已经解决了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|203361|server+clustertimeserver+minpoll+0+maxpoll+0
(using+one+second+polling+interval)+|code-block|syntax|javascript|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|I|8|@]|9|@]|A|$E|F]]]|G|$]]

I set up an extra time server for the cluster. The clients in the cluster now synchronize with the time server every second. The problem has not occurred since then. I guess the problem is solved.
<pre><code>server clustertimeserver minpoll 0 maxpoll 0
(using one second polling interval) 
</code></pre>

We have a cluster where exact time synchronization is very important. We use Ubuntu 20.04 servers and and chrony. Unfortunately there are always problems with time synchronization. No other known time synchronization service is running. I can also provide the Chrony logs It would be very nice if someone can help me.
<blockquote>
host1-mstr01 ntpq environment: line 7: ntpq: command not found
ntpstat environment: line 10: ntpstat: command not found
● systemd-timesyncd.service
Loaded: masked (Reason: Unit systemd-timesyncd.service is masked.)
Active: inactive (dead)
timedatectl
Local time: Tue 2020-12-22 09:43:50 CET
Universal time: Tue 2020-12-22 08:43:50 UTC
RTC time: Tue 2020-12-22 08:43:50
Time zone: Europe/Berlin (CET, +0100) System clock synchronized: yes
NTP service: active
RTC in local TZ: no
chronyc tracking Reference ID : 0A0010FE (host1-timeserver) Stratum
: 3 Ref time (UTC) : Tue Dec 22 08:43:41 2020 System time :
0.000016022 seconds slow of NTP time Last offset : -0.000016416 seconds RMS offset : 0.000014285 seconds Frequency : 34.582
ppm slow Residual freq : +0.002 ppm Skew : 0.042 ppm Root
delay : 0.004369508 seconds Root dispersion : 0.016251557 seconds
Update interval : 514.3 seconds Leap status : Normal
chronyc sources 210 Number of sources = 1 MS Name/IP address 
Stratum Poll Reach LastRx Last sample
=============================================================================== ^* host1-timeserver 2 8 377 9 -7039ns[ -23us] +/- 
34ms
host2-mstr01 ntpq environment: line 7: ntpq: command not found
environment: line 10: ntpstat: command not found
ntpstat
● systemd-timesyncd.service
Loaded: masked (Reason: Unit systemd-timesyncd.service is masked.)
Active: inactive (dead) since Tue 2020-09-29 17:46:17 CEST; 2 months 22 days ago Main PID: 12619 (code=exited, status=0/SUCCESS)
Status: &quot;Shutting down...&quot;
Aug 11 13:31:33 host2-mstr01 systemd[1]: Started Network Time
Synchronization. Aug 11 13:31:33 host2-mstr01
systemd-timesyncd[12619]: Initial synchronization to time server
10.0.16.254:123 (host1-NTP01). Sep 17 10:44:52 host2-mstr01 systemd-timesyncd[12619]: Timed out waiting for reply from
10.0.16.254:123 (host1-NTP01). Sep 17 13:00:51 host2-mstr01 systemd-timesyncd[12619]: Initial synchronization to time server
10.0.16.254:123 (host1-NTP01). Sep 21 04:03:23 host2-mstr01 systemd-timesyncd[12619]: Initial synchronization to time server
10.0.16.254:123 (host1-NTP01). Sep 26 10:58:27 host2-mstr01 systemd-timesyncd[12619]: Initial synchronization to time server
10.0.16.254:123 (host1-NTP01). Sep 27 02:49:01 host2-mstr01 systemd-timesyncd[12619]: Initial synchronization to time server
10.0.16.254:123 (host1-NTP01). Sep 29 17:46:17 host2-mstr01 systemd[1]: Stopping Network Time Synchronization... Sep 29 17:46:17
host2-mstr01 systemd[1]: systemd-timesyncd.service: Succeeded. Sep 29
17:46:17 host2-mstr01 systemd[1]: Stopped Network Time
Synchronization.
timedatectl
Local time: Tue 2020-12-22 09:43:51 CET
Universal time: Tue 2020-12-22 08:43:51 UTC
RTC time: Tue 2020-12-22 08:43:51
Time zone: Europe/Berlin (CET, +0100) System clock synchronized: yes
NTP service: active
RTC in local TZ: no
chronyc tracking Reference ID : 0A0010FE (host1-timeserver) Stratum
: 3 Ref time (UTC) : Tue Dec 22 08:33:06 2020 System time :
0.000032089 seconds fast of NTP time Last offset : +0.000019423 seconds RMS offset : 0.000798126 seconds Frequency : 2.984
ppm slow Residual freq : +0.000 ppm Skew : 0.036 ppm Root
delay : 0.018379021 seconds Root dispersion : 0.010704475 seconds
Update interval : 1040.9 seconds Leap status : Normal
chronyc sources 210 Number of sources = 1 MS Name/IP address 
Stratum Poll Reach LastRx Last sample
=============================================================================== ^* host1-timeserver 2 10 377 644 +78us[ +97us] +/- 
32ms environment: line 7: ntpq: command not found
host1-node01 ntpq
ntpstat environment: line 10: ntpstat: command not found
● systemd-timesyncd.service
Loaded: masked (Reason: Unit systemd-timesyncd.service is masked.)
Active: inactive (dead)
timedatectl
Local time: Tue 2020-12-22 09:43:52 CET
Universal time: Tue 2020-12-22 08:43:52 UTC
RTC time: Tue 2020-12-22 08:43:52
Time zone: Europe/Berlin (CET, +0100) System clock synchronized: yes
NTP service: active
RTC in local TZ: no
chronyc tracking Reference ID : 0A0010FE (host1-timeserver) Stratum
: 3 Ref time (UTC) : Tue Dec 22 08:42:25 2020 System time :
0.000003835 seconds fast of NTP time Last offset : +0.000009851 seconds RMS offset : 0.000719458 seconds Frequency : 34.179
ppm slow Residual freq : +0.014 ppm Skew : 0.088 ppm Root
delay : 0.004465697 seconds Root dispersion : 0.021002445 seconds
Update interval : 128.5 seconds Leap status : Normal
chronyc sources 210 Number of sources = 1 MS Name/IP address 
Stratum Poll Reach LastRx Last sample
=============================================================================== ^* host1-timeserver 2 7 377 86 +14us[ +24us] +/- 
33ms environment: line 7: ntpq: command not found
host1-node02 ntpq environment: line 10: ntpstat: command not found
ntpstat
● systemd-timesyncd.service
Loaded: masked (Reason: Unit systemd-timesyncd.service is masked.)
Active: inactive (dead)
timedatectl
Local time: Tue 2020-12-22 09:43:53 CET
Universal time: Tue 2020-12-22 08:43:53 UTC
RTC time: Tue 2020-12-22 08:43:53
Time zone: Europe/Berlin (CET, +0100) System clock synchronized: yes
NTP service: active
RTC in local TZ: no
chronyc tracking Reference ID : 0A0010FE (host1-timeserver) Stratum
: 3 Ref time (UTC) : Tue Dec 22 08:42:28 2020 System time :
0.000008563 seconds slow of NTP time Last offset : -0.000016512 seconds RMS offset : 0.002114891 seconds Frequency : 32.695
ppm slow Residual freq : -0.029 ppm Skew : 0.250 ppm Root
delay : 0.004427484 seconds Root dispersion : 0.021170758 seconds
Update interval : 130.4 seconds Leap status : Normal
chronyc sources 210 Number of sources = 1 MS Name/IP address 
Stratum Poll Reach LastRx Last sample
=============================================================================== ^* host1-timeserver 2 7 377 84 -16us[ -32us] +/- 
33ms environment: line 7: ntpq: command not found
host1-node03 ntpq
ntpstat environment: line 10: ntpstat: command not found
● systemd-timesyncd.service
Loaded: masked (Reason: Unit systemd-timesyncd.service is masked.)
Active: inactive (dead)
timedatectl
Local time: Tue 2020-12-22 09:43:55 CET
Universal time: Tue 2020-12-22 08:43:55 UTC
RTC time: Tue 2020-12-22 08:43:55
Time zone: Europe/Berlin (CET, +0100) System clock synchronized: yes
NTP service: active
RTC in local TZ: no
chronyc tracking Reference ID : 0A0010FE (host1-timeserver) Stratum
: 3 Ref time (UTC) : Tue Dec 22 08:42:16 2020 System time :
0.000002321 seconds fast of NTP time Last offset : -0.000001159 seconds RMS offset : 0.000047930 seconds Frequency : 34.080
ppm slow Residual freq : +0.001 ppm Skew : 0.060 ppm Root
delay : 0.006130085 seconds Root dispersion : 0.017225547 seconds
Update interval : 519.0 seconds Leap status : Normal
chronyc sources 210 Number of sources = 1 MS Name/IP address 
Stratum Poll Reach LastRx Last sample
=============================================================================== ^* host1-timeserver 2 9 377 99 -3398ns[-4557ns] +/- 
33ms
host2-node01 ntpq environment: line 7: ntpq: command not found
ntpstat environment: line 10: ntpstat: command not found
● systemd-timesyncd.service
Loaded: masked (Reason: Unit systemd-timesyncd.service is masked.)
Active: inactive (dead)
timedatectl
Local time: Tue 2020-12-22 09:43:56 CET
Universal time: Tue 2020-12-22 08:43:56 UTC
RTC time: Tue 2020-12-22 08:43:56
Time zone: Europe/Berlin (CET, +0100) System clock synchronized: yes
NTP service: active
RTC in local TZ: no
chronyc tracking Reference ID : 0A0010FE (host1-timeserver) Stratum
: 3 Ref time (UTC) : Tue Dec 22 08:29:07 2020 System time :
0.000026769 seconds fast of NTP time Last offset : +0.000061154 seconds RMS offset : 0.000095979 seconds Frequency : 1.427
ppm slow Residual freq : +0.001 ppm Skew : 0.021 ppm Root
delay : 0.017465375 seconds Root dispersion : 0.011619666 seconds
Update interval : 1044.3 seconds Leap status : Normal
chronyc sources 210 Number of sources = 1 MS Name/IP address 
Stratum Poll Reach LastRx Last sample
=============================================================================== ^* host1-timeserver 2 10 377 889 +380us[ +441us] +/- 
27ms environment: line 7: ntpq: command not found
host2-node02 ntpq environment: line 10: ntpstat: command not found
ntpstat
● systemd-timesyncd.service
Loaded: masked (Reason: Unit systemd-timesyncd.service is masked.)
Active: inactive (dead)
timedatectl
Local time: Tue 2020-12-22 09:43:57 CET
Universal time: Tue 2020-12-22 08:43:57 UTC
RTC time: Tue 2020-12-22 08:43:57
Time zone: Europe/Berlin (CET, +0100) System clock synchronized: yes
NTP service: active
RTC in local TZ: no
chronyc tracking Reference ID : 0A0010FE (host1-timeserver) Stratum
: 3 Ref time (UTC) : Tue Dec 22 08:31:51 2020 System time :
0.000060706 seconds fast of NTP time Last offset : +0.000152064 seconds RMS offset : 0.000274430 seconds Frequency : 1.858
ppm slow Residual freq : +0.005 ppm Skew : 0.116 ppm Root
delay : 0.019006269 seconds Root dispersion : 0.018152438 seconds
Update interval : 1030.5 seconds Leap status : Normal
chronyc sources 210 Number of sources = 1 MS Name/IP address 
Stratum Poll Reach LastRx Last sample
=============================================================================== ^* host1-timeserver 2 10 377 726 +297us[ +449us] +/- 
30ms environment: line 7: ntpq: command not found
host2-node03 ntpq
ntpstat environment: line 10: ntpstat: command not found
● systemd-timesyncd.service
Loaded: masked (Reason: Unit systemd-timesyncd.service is masked.)
Active: inactive (dead)
timedatectl
Local time: Tue 2020-12-22 09:43:59 CET
Universal time: Tue 2020-12-22 08:43:59 UTC
RTC time: Tue 2020-12-22 08:43:59
Time zone: Europe/Berlin (CET, +0100) System clock synchronized: yes
NTP service: active
RTC in local TZ: no
chronyc tracking Reference ID : 0A0010FE (host1-timeserver) Stratum
: 3 Ref time (UTC) : Tue Dec 22 08:38:06 2020 System time :
0.000103265 seconds fast of NTP time Last offset : +0.000101621 seconds RMS offset : 0.000754228 seconds Frequency : 2.710
ppm slow Residual freq : +0.002 ppm Skew : 0.065 ppm Root
delay : 0.018792789 seconds Root dispersion : 0.015140322 seconds
Update interval : 1035.0 seconds Leap status : Normal
chronyc sources 210 Number of sources = 1 MS Name/IP address 
Stratum Poll Reach LastRx Last sample
=============================================================================== ^* host1-timeserver 2 10 377 353 +342us[ +443us] +/- 
36ms
</blockquote>

chrony time synchronization problems

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

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