?1、安裝ntp服務
root@localhost ~]# yum -y install ntp
已加載插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile* base: mirrors.nju.edu.cn* centos-sclo-rh: mirrors.nju.edu.cn* centos-sclo-sclo: mirrors.huaweicloud.com* epel: mirrors.huaweicloud.com* extras: mirrors.nju.edu.cn* nux-dextop: mirror.li.nux.ro* updates: mirrors.nju.edu.cn
軟件包 ntp-4.2.6p5-29.el7.centos.2.x86_64 已安裝并且是最新版本2、啟動ntpd
[root@localhost elasticsearch]# systemctl start ntpd
[root@localhost elasticsearch]# systemctl enable ntpd#列顯示了 NTP 服務器的 IP 地址或主機名
[root@localhost elasticsearch]# ntpq -premote refid st t when poll reach delay offset jitter
==============================================================================119.28.206.193 .STEP. 16 u 614 64 0 0.000 0.000 0.000
+ntp.ams1.nl.lea 130.133.1.10 2 u 23 64 1 211.185 -1.552 6.721
+ntp1.flashdance 194.58.202.20 2 u 57 64 1 257.396 0.792 0.827
*electrode.felix 131.188.3.221 2 u 55 64 1 184.682 6.590 0.424
?3、修改ntp配置文件
vim /etc/ntp.conf
#同步阿里云時間
#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 ntp.aliyun.com iburst#重啟服務
systemctl restart ntpd?4、203.107.6.88? ? 就是阿里云的ntp服務器的ip地址了
[root@localhost elasticsearch]# ntpq -p
? ? ?remote ? ? ? ? ? refid ? ? ?st t when poll reach ? delay ? offset ?jitter
==============================================================================
*203.107.6.88 ? ?100.107.25.114 ? 2 u ? 20 ? 64 ? ?1 ? 29.587 ? ?6.472 ? 0.839
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