Set NTP Server in varies linux
·620 字
目录
0x01 Fedora #
chrony #
Fedora use chrony, just edit /etc/chrony.conf
;
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (https://www.pool.ntp.org/join.html).
#pool 2.fedora.pool.ntp.org iburst
server time.apple.com iburst
Then restart chronyd with systemd.
[root@crazy ~]# systemctl restart chronyd.service
Use chronyc to check sync status:
[root@crazy ~]# chronyc sources -v
.-- Source mode '^' = server, '=' = peer, '#' = local clock.
/ .- Source state '*' = current best, '+' = combined, '-' = not combined,
| / 'x' = may be in error, '~' = too variable, '?' = unusable.
|| .- xxxx [ yyyy ] +/- zzzz
|| Reachability register (octal) -. | xxxx = adjusted offset,
|| Log2(Polling interval) --. | | yyyy = measured offset,
|| \ | | zzzz = estimated error.
|| | | \
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* hkhkg1-ntp-002.aapl> 3 6 37 32 +32us[ +451us] +/- 5801us
^? 106.55.184.199 2 6 3 38 -834us[ -414us] +/- 42ms
0x02 Ubuntu #
systemd-timesyncd #
Edit /etc/systemd/timesyncd.conf
;
[Time]
NTP=time1.tencentyun.com
Then restart systemd-timesyncd;
root@crazy:~# systemctl restart systemd-timesyncd.service
Check sync status with timedatectl:
root@crazy:~# timedatectl timesync-status
Server: 169.254.0.79 (time1.tencentyun.com)
Poll interval: 2min 8s (min: 32s; max 34min 8s)
Leap: normal
Version: 4
Stratum: 2
Reference: 914B85C
Precision: 1us (-25)
Root distance: 20.522ms (max: 5s)
Offset: -129us
Delay: 2.881ms
Jitter: 49us
Packet count: 2
Frequency: -1.536ppm
0x03 Alpine Linux #
ntpd + crontab #
Create /etc/periodic/daily/do-ntp
for cron.
#!/bin/sh
ntpd -d -q -n -p time.apple.com
Test it in bash:
crazy:~# bash /etc/periodic/daily/do-ntp
ntpd: 'time.apple.com' is 2403:300:a0c:4000::1f2
ntpd: sending query to 2403:300:a0c:4000::1f2
ntpd: reply from 2403:300:a0c:4000::1f2: offset:+0.028085 delay:0.001039 status:0x24 strat:1 refid:0x004d4853 rootdelay:0.000000 reach:0x01
ntpd: sending query to 2403:300:a0c:4000::1f2
ntpd: reply from 2403:300:a0c:4000::1f2: offset:+0.028060 delay:0.001038 status:0x24 strat:1 refid:0x004d4853 rootdelay:0.000000 reach:0x03
Chrony #
But ntpd not works well, so i switched to Chrony.
crazy:~# setup-ntp
Which NTP client to run? ('busybox', 'openntpd', 'chrony' or 'none') [chrony]
* service chronyd added to runlevel default
* Caching service dependencies ... [ ok ]
* Starting chronyd ... [ ok ]
Then edit /etc/chrony/chrony.conf
as well.
pool time.apple.com iburst
#initstepslew 10 pool.ntp.org
driftfile /var/lib/chrony/chrony.drift
rtcsync
cmdport 0
Restart chrony service:
crazy:~# service chronyd restart
* Stopping chronyd ... [ ok ]
* Starting chronyd ... [ ok ]
Check chrony status:
crazy:~# chronyc sources -v
.-- Source mode '^' = server, '=' = peer, '#' = local clock.
/ .- Source state '*' = current best, '+' = combined, '-' = not combined,
| / 'x' = may be in error, '~' = too variable, '?' = unusable.
|| .- xxxx [ yyyy ] +/- zzzz
|| Reachability register (octal) -. | xxxx = adjusted offset,
|| Log2(Polling interval) --. | | yyyy = measured offset,
|| \ | | zzzz = estimated error.
|| | | \
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^- ussjc2-ntp-001.aaplimg.c> 1 6 17 51 +108us[ +108us] +/- 3869us
^- uslax1-ntp-001.aaplimg.c> 1 6 17 52 +88us[ +88us] +/- 340us
^* uslax1-ntp-002.aaplimg.c> 1 6 17 52 +21us[ +17us] +/- 389us
crazy:~# chronyc tracking
Reference ID : 11FD1AFD (uslax1-ntp-002.aaplimg.com)
Stratum : 2
Ref time (UTC) : Fri Mar 03 05:10:54 2023
System time : 0.000000001 seconds fast of NTP time
Last offset : -0.000004359 seconds
RMS offset : 0.000004359 seconds
Frequency : 34.442 ppm fast
Residual freq : -4.737 ppm
Skew : 46.485 ppm
Root delay : 0.000530292 seconds
Root dispersion : 0.003259220 seconds
Update interval : 1.6 seconds
Leap status : Normal
Test connection:
lax6:~# chronyd -Q -t 3 'server time.cloudflare.com iburst maxsamples 1'
2023-03-04T03:34:19Z chronyd version 4.3 starting (+CMDMON +NTP +REFCLOCK +RTC +PRIVDROP -SCFILTER +SIGND +ASYNCDNS +NTS +SECHASH +IPV6 -DEBUG)
2023-03-04T03:34:19Z Disabled control of system clock
2023-03-04T03:34:20Z System clock wrong by -0.002741 seconds (ignored)
2023-03-04T03:34:20Z chronyd exiting
参考资料: