NTP-Chrony服务配置手册

1.1 安装与配置chrony

# Centos7默认已经安装chrony为ntp服务.如果chronyd不存在则需要进行安装 # 确认chrony是否安装 [root@ntpsrv ~]# yum info chrony | grep ^Repo Repo : installed # installed为已安装 # 如果未安装chrony,则执行以下命令 [root@ntpsrv ~]# yum install chrony -y

1.2 配置chrony服务

[root@ntpsrv ~]# vim /etc/chrony.conf # 删除第2行-第5行，并改为中国ntp srv server cn.pool.ntp.org iburst server 0.cn.pool.ntp.org iburst server 1.cn.pool.ntp.org iburst server 2.cn.pool.ntp.org iburst ...... ...... ...... ...... ...... ...... # 取消第27行'#'注释符,允许指定网络访问此ntp server allow 192.168.0.0/16 ...... ...... ...... ...... ...... ...... # 修改第30,取消'#'符.允许ntp服务器未能成功同步时间，也可以为ntp客户端提供服务 local stratum 10 ...... ...... ...... ...... ...... ......

1.3 启动chrony服务

1.3.1 启动chrony服务

[root@ntpsrv ~]# systemctl enable --now chronyd [root@ntpsrv ~]# systemctl is-active chronyd active

1.3.2 重启chrony服务

[root@ntpsrv ~]# systemctl restart chronyd

1.3.3 防火墙配置

[root@ntpsrv ~]# firewall-cmd --add-service=ntp --permanent success [root@ntpsrv ~]# firewall-cmd --reload success

1.4 验证chrony

[root@ntpsrv ~]# chronyc sources 210 Number of sources = 4 MS Name/IP address Stratum Poll Reach LastRx Last sample =============================================================================== ^* 122.51.252.99 3 6 17 8 +485us[-1709us] +/- 73ms ^? ntp5.flashdance.cx 2 6 7 10 -513ms[ -513ms] +/- 722ms ^- 139.199.215.251 2 6 17 19 -2265us[-2265us] +/- 35ms ^? 119.28.183.184 2 7 4 16 -1072us[-1072us] +/- 38ms

[root@ntpclient ~]# vim /etc/chrony.conf # 删除第2行-第5行，并改为本地ntp srv server 192.168.188.11 iburst [root@ntpclient ~]# systemctl restart chronyd [root@ntpclient ~]# chronyc sources 210 Number of sources = 1 MS Name/IP address Stratum Poll Reach LastRx Last sample =============================================================================== ^* 192.168.188.11 3 6 77 50 +124us[ +257us] +/- 636ms