编辑
我已经尝试了所有的建议,但似乎ntpd只是拒绝与服务器同步.
[vivs@peter-centos ~]$/usr/sbin/ntpq -np
remote refid st t when poll reach delay offset jitter
==============================================================
192.168.0.30 .LOCL. 1 u 11 64 3 0.984 232732. 20083.2
此抖动“20083.2”是否表示手动更改时间？
我已经关闭了vmware的时间同步.
原始问题
这是ntp的状态
[root@peter-centos gw]# /usr/sbin/ntpq -pn remote refid st t when poll reach delay offset jitter ============================================= 192.168.0.30 .LOCL. 1 u 153 1024 377 0.950 1905553 274023. *127.127.1.0 .LOCL. 10 l 9 64 377 0.000 0.000 0.001
您可以看到它只与本地时钟’127.127.1.0’同步.
是因为偏移量太大了吗？
但是在我手动设置date by date命令后,它仍然拒绝同步到192.168.0.30
这可能是ntp.conf
# Permit time synchronization with our time source,but do not # permit the source to query or modify the service on this system. restrict default kod nomodify notrap nopeer noquery restrict -6 default kod nomodify notrap nopeer noquery # Permit all access over the loopback interface. This Could # be tightened as well,but to do so would effect some of # the administrative functions. restrict 127.0.0.1 restrict -6 ::1 # Hosts on local network are less restricted. #restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap # Use public servers from the pool.ntp.org project. # Please consider joining the pool (http://www.pool.ntp.org/join.html). #server 0.centos.pool.ntp.org #server 1.centos.pool.ntp.org #server 2.centos.pool.ntp.org server 192.168.0.30 #blf #broadcast 192.168.1.255 key 42 # broadcast server #broadcastclient # broadcast client #broadcast 224.0.1.1 key 42 # multicast server #multicastclient 224.0.1.1 # multicast client #manycastserver 239.255.254.254 # manycast server #manycastclient 239.255.254.254 key 42 # manycast client # Undisciplined Local Clock. This is a fake driver intended for backup # and when no outside source of synchronized time is available. #server 127.127.1.0 # local clock #fudge 127.127.1.0 stratum 10 # Drift file. Put this in a directory which the daemon can write to. # No symbolic links allowed,either,since the daemon updates the file # by creating a temporary in the same directory and then rename()'ing # it to the file. driftfile /var/lib/ntp/drift # Key file containing the keys and key identifiers used when operating # with symmetric key cryptography. keys /etc/ntp/keys # Specify the key identifiers which are trusted. #trustedkey 4 8 42 # Specify the key identifier to use with the ntpdc utility. #requestkey 8 # Specify the key identifier to use with the ntpq utility. #controlkey 8 lkey 8 h the ntpdc utility. #requestkey 8 # Specify the key identifier to use with the ntpq utility. #controlkey 8 lkey 8 olkey 8 lkey 8
解决方法
啊 – 现在变得清晰了：
My machine is installed in vmware
workstation. So,form all the answers,
I guess maybe the jitter becomes so
large is because that vmware adjust
the time. I will see if I am right.
不要在VM中运行ntp.主机不保证cpu片,因此VM的时钟不准确.正如你所看到的那样,ntp正试图跟上看起来像一个异常变化的外部时钟并最终放弃的东西.
这个问题的一般答案是不运行ntp,安装VMware工具并将VM的时钟锁定到主机的时钟.
具体答案取决于您运行的Linux版本.我在CentOS上有一些注释(可能一般适用于其他RedHat系列发行版)here.
