博客前几天迁移到米兰的年付12欧的小鸡，发现系统时间有问题，快2个小时，导致NSD的DNS主从服务同步域名zone文件出错，今天好好研究了一下

1、Centos 8 默认没有ntp软件，只能用chrony代替

###安装yum -y install chrony
###修改chrony配置文件
[root@mil ~]# vi /etc/chrony.conf

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 0.africa.pool.ntp.org iburst
server 1.africa.pool.ntp.org iburst
server 2.africa.pool.ntp.org iburst
server 3.africa.pool.ntp.org iburst

###设置开机自启动和启动chrony
systemctl enable chronyd
systemctl restart chronyd

2、坑来了

[root@mil ~]# timedatectl  status
               Local time: Tue 2020-06-30 21:00:51 CST
           Universal time: Tue 2020-06-30 13:00:51 UTC
                 RTC time: Tue 2020-06-30 13:00:51
                Time zone: Asia/Shanghai (CST, +0800)
System clock synchronized: no    (这是为yes才可以，但是系统一直是no的一种状态)
              NTP service: active
          RTC in local TZ: no

###解决方案：
[root@mil ~]# hwclock --systohc --utc   （修改硬件时间为UTC格式）
[root@mil ~]# timedatectl  status
               Local time: Tue 2020-06-30 21:03:04 CST
           Universal time: Tue 2020-06-30 13:03:04 UTC
                 RTC time: Tue 2020-06-30 13:03:04
                Time zone: Asia/Shanghai (CST, +0800)
System clock synchronized: yes
              NTP service: active
          RTC in local TZ: no

###问题解决