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chrony 의 설정 파일은 /etc/chrony.conf 입니다. 에디터로 열어서 기존 서버 정보를 주석 처리하고 한국과 아시아를 추가합니다.

Code Block
title/etc/chrony.conf 
# server 0.centos.pool.ntp.org iburst
# server 1.centos.pool.ntp.org iburst
# server 2.centos.pool.ntp.org iburst
# server 3.centos.pool.ntp.org iburst

server time.bora.net iburst
server time.postech.ac.kr iburst
server time.kaist.ac.kr iburst


동기화 설정이 제대로 되었는지 확인하기 위해 timedatectl 명령을 실행합니다.

Code Block
# timedatectl 

 Local time: Sat 2020-01-11 17:19:18 KST
  Universal time: Sat 2020-01-11 08:19:18 UTC
        RTC time: Sat 2020-01-11 08:19:18
       Time zone: Asia/Seoul (KST, +0900)
     NTP enabled: yes
NTP synchronized: yes
 RTC in local TZ: no
      DST active: n/a


chronyd 를 콘트롤하는 명령어인 chronyc 로 정상 연결 여부를 확인합니다. 

Code Block
# chronyc sources -v

210 Number of sources = 4

  .-- Source mode  '^' = server, '=' = peer, '#' = local clock.
 / .- Source state '*' = current synced, '+' = combined , '-' = not combined,
| /   '?' = unreachable, 'x' = time may be in error, '~' = time too variable.
||                                                 .- 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               
===============================================================================
^* 106.247.248.106               2  10   377   778  -1074us[-1068us] +/-   29ms
^+ 210.183.236.141               2  10   377   920  +5391us[+5396us] +/-   67ms
^+ send.mx.cdnetworks.com        2  10   377   860  +1092us[+1098us] +/-   58ms
^+ dadns.cdnetworks.co.kr        2  10   377     5   +206us[ +206us] +/-   33ms


같이 보기


참고