Linux集群时间同步设置

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打算将11台Linux集群时间同步一下，操作系统都为Ubuntu 11.04 x86 64位

选定其中一台133.133.10.2作为时间服务器（ntp server），其他节点与该节点进行时间同步。

 

1、在133.133.10.2（monitor）上安装ntp server。

root@monitor:~# apt-get install ntp

 

2、修改/etc/ntp.conf如下：（参考了http://blog.sina.com.cn/s/blog_6b86fdc50100ojfn.html）

 

 

# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help

 

driftfile /var/lib/ntp/ntp.drift

 

 

# Enable this if you want statistics to be logged.

#statsdir /var/log/ntpstats/

 

statistics loopstats peerstats clockstats

filegen loopstats file loopstats type day enable

filegen peerstats file peerstats type day enable

filegen clockstats file clockstats type day enable

 

# Specify one or more NTP servers.

 

# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board

# on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for

# more information.

#server 0.ubuntu.pool.ntp.org

#server 1.ubuntu.pool.ntp.org

#server 2.ubuntu.pool.ntp.org

#server 3.ubuntu.pool.ntp.org

 

# Use Ubuntu's ntp server as a fallback.

#server ntp.ubuntu.com

server 127.127.1.0 minpoll 4 maxpoll 5

fudge 127.127.1.0 stratum 2

 

# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for

# details.  The web page

# might also be helpful.

#

# Note that "restrict" applies to both servers and clients, so a configuration

# that might be intended to block requests from certain clients could also end

# up blocking replies from your own upstream servers.

 

# By default, exchange time with everybody, but don't allow configuration.

#restrict -4 default kod notrap nomodify nopeer noquery

#restrict -6 default kod notrap nomodify nopeer noquery

restrict -4 default kod nomodify noper

restrict -6 default kod nomodify noper

 

# Local users may interrogate the ntp server more closely.

restrict 127.0.0.1

restrict ::1

 

# Clients from this (example!) subnet have unlimited access, but only if

# cryptographically authenticated.

#restrict 192.168.123.0 mask 255.255.255.0 notrust

 

 

# If you want to provide time to your local subnet, change the next line.

# (Again, the address is an example only.)

#broadcast 192.168.123.255

 

# If you want to listen to time broadcasts on your local subnet, de-comment the

# next lines.  Please do this only if you trust everybody on the network!

#disable auth

#broadcastclient

3、运行ntpdate命令

首先重启一下ntp服务

root@monitor:/etc#/etc/init.d/ntp restart

 

再运行

root@monitor:/etc# ntpdate -q 127.0.0.1

得到

server 127.0.0.1, stratum 3, offset -0.000003, delay 0.02565

23 Sep 17:12:00 ntpdate[11502]: adjust time server 127.0.0.1 offset -0.000003 sec

4、将其他节点133.133.10.*的时间与133.133.10.2同步

在其他每一个节点运行命令

root@slave1:~# ntpdate 133.133.10.2

这时候发现节点间的时间同步了，但ntpdate只在开机运行，我们若要设置为1小时同步一次，那么进行第5步

5、将其他节点133.133.10.*的时间定期与133.133.10.2同步

安装完以后使用crontab来自动更新时间：

#crontab -e

添加如下行：

* */1 * * * /usr/sbin/ntpdate 133.133.10.2

这行的意思是每个小时与与133.133.10.2时间同步一次。

6、通过date命令发现所有节点时间都一致了