1.安装ntp服务端
[root@kafka1 ~]# yum install ntp -y
2.修改配置
cat /etc/ntp.conf driftfile /var/lib/ntp/drift restrict default nomodify notrap nopeer noquery restrict 127.0.0.1 restrict ::1 restrict 10.23.215.0 mask 255.255.255.0 nomodify server 127.127.1.0 fudge 127.127.1.0 stratum 10 includefile /etc/ntp/crypto/pw keys /etc/ntp/keys
3.启动服务
systemctl start ntpd
4.查看服务
[root@kafka1 ~]# systemctl status ntpd ● ntpd.service - Network Time Service Loaded: loaded (/usr/lib/systemd/system/ntpd.service; disabled; vendor preset: disabled) Active: active (running) since Fri 2020-06-12 20:55:06 CST; 54s ago Process: 26124 ExecStart=/usr/sbin/ntpd -u ntp:ntp $OPTIONS (code=exited, status=0/SUCCESS) Main PID: 26125 (ntpd) CGroup: /system.slice/ntpd.service └─26125 /usr/sbin/ntpd -u ntp:ntp -g Jun 12 20:55:06 kafka1 ntpd[26125]: Listen and drop on 1 v6wildcard :: UDP 123 Jun 12 20:55:06 kafka1 ntpd[26125]: Listen normally on 2 lo 127.0.0.1 UDP 123 Jun 12 20:55:06 kafka1 ntpd[26125]: Listen normally on 3 ens160 10.23.215.101 UDP 123 Jun 12 20:55:06 kafka1 ntpd[26125]: Listen normally on 4 lo ::1 UDP 123 Jun 12 20:55:06 kafka1 ntpd[26125]: Listen normally on 5 ens160 fe80::250:56ff:febe:26fb UDP 123 Jun 12 20:55:06 kafka1 ntpd[26125]: Listening on routing socket on fd #22 for interface updates Jun 12 20:55:06 kafka1 ntpd[26125]: 0.0.0.0 c016 06 restart Jun 12 20:55:06 kafka1 ntpd[26125]: 0.0.0.0 c012 02 freq_set kernel 0.000 PPM Jun 12 20:55:06 kafka1 ntpd[26125]: 0.0.0.0 c011 01 freq_not_set Jun 12 20:55:07 kafka1 ntpd[26125]: 0.0.0.0 c514 04 freq_mode [root@kafka1 ~]# ntpq -np remote refid st t when poll reach delay offset jitter ============================================================================== *127.127.1.0 .LOCL. 10 l 26 64 3 0.000 0.000 0.000 [root@kafka1 ~]# timedatectl Local time: Fri 2020-06-12 20:57:00 CST Universal time: Fri 2020-06-12 12:57:00 UTC RTC time: Fri 2020-06-12 12:57:00 Time zone: Asia/Shanghai (CST, +0800) NTP enabled: no NTP synchronized: yes RTC in local TZ: no DST active: n/a
[root@kafka1 ~]# timedatectl set-ntp yes [root@kafka1 ~]# timedatectl Local time: Fri 2020-06-12 20:57:47 CST Universal time: Fri 2020-06-12 12:57:47 UTC RTC time: Fri 2020-06-12 12:57:48 Time zone: Asia/Shanghai (CST, +0800) NTP enabled: yes NTP synchronized: yes RTC in local TZ: no DST active: n/a
[root@kafka1 ~]# ntpstat synchronised to local net (127.127.1.0) at stratum 11 time correct to within 3948 ms polling server every 64 s
[root@kafka1 ~]# ntpq -np remote refid st t when poll reach delay offset jitter ============================================================================== *127.127.1.0 .LOCL. 10 l 26 64 3 0.000 0.000 0.000
客户端安装
[root@kafka2 ~]# yum install ntp -y
修改配置
[root@kafka2 ~]# cat /etc/ntp.conf driftfile /var/lib/ntp/drift restrict default nomodify notrap nopeer noquery restrict 127.0.0.1 restrict ::1 restrict 10.23.215.0 mask 255.255.255.0 nomodify server 10.23.215.101 prefer fudge 127.127.1.0 stratum 15 includefile /etc/ntp/crypto/pw keys /etc/ntp/keys
启动客户端
[root@kafka2 ~]# systemctl start ntpd
[root@kafka2 ~]# timedatectl Local time: Fri 2020-06-12 21:06:45 CST Universal time: Fri 2020-06-12 13:06:45 UTC RTC time: Fri 2020-06-12 13:06:46 Time zone: Asia/Shanghai (CST, +0800) NTP enabled: yes NTP synchronized: no RTC in local TZ: no DST active: n/a
[root@kafka2 ~]# timedatectl set-ntp yes
[root@kafka2 ~]# ntpstat synchronised to NTP server (10.23.215.101) at stratum 12 time correct to within 972 ms polling server every 64 s [root@kafka2 ~]# ntpq -np remote refid st t when poll reach delay offset jitter ============================================================================== *10.23.215.101 LOCAL(0) 11 u 29 64 17 0.315 -21.375 0.018
时间同步正常