CDH NTP服务安装

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