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搭建ntp时间服务器

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查看2238 | 回复0 | 2019-5-17 15:35:50 | 显示全部楼层 |阅读模式
###  ntp服务器:10.0.0.61
###  下载安装
     yum install ntp ntpdate
     
####  修改配置文件:/etc/ntp/conf
     [root@vpn scripts]# cat /etc/ntp.conf
     # For more information about this file, see the man pages
     # ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5).
     
     driftfile /var/lib/ntp/drift
     
     # 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
     service 172.16.1.61
     # 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 3.centos.pool.ntp.org
     
     #broadcast 192.168.1.255 autokey    # broadcast server
     #broadcastclient            # broadcast client
     #broadcast 224.0.1.1 autokey        # multicast server
     #multicastclient 224.0.1.1        # multicast client
     #manycastserver 239.255.254.254        # manycast server
     #manycastclient 239.255.254.254 autokey # manycast client
     
     server 127.127.1.0
     fudge  127.127.1.0 stratum 10
     
     # Enable public key cryptography.
     #crypto
     
     includefile /etc/ntp/crypto/pw
     
     # 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
     
     # Enable writing of statistics records.
     #statistics clockstats cryptostats loopstats peerstats
     
####  启动服务
     service ntpd start
     
####  检查
     ntpq -p
     [root@vpn scripts]# ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
     ==============================================================================
     +ntp5.flashdance 194.58.202.20    2 u   55   64   17  226.709   11.084  13.639
      static-5-103-13 .GPS.            1 u  120   64    2  239.689   18.837   0.000
     *85.199.214.101  .GPS.            1 u   54   64   17  210.012   -3.548  16.501
      cn.ntp.faelix.n 185.134.196.169  2 u  115   64   16  236.597    2.159  23.535
      LOCAL(0)        .LOCL.          10 l   56   64   17    0.000    0.000   0.000
####  ps:jitter数值全部为0 的话表示失败,一般是防火墙未关闭,关闭即可
     service iptables stop
####  或者:在vi /etc/sysconfig/iptables添加如下规则:

     -A INPUT -m state --state NEW -m udp -p udp --dport 123 -j ACCEPT
     

###客户端配置:

####  客户端安装ntp服务

     [root@vpn scripts]# ansible all -m yum -a "name=ntp name=ntpdate state=installed"

####  配置ntp.conf文件

     ansible all -m command -a "echo 10.0.0.61>>/etc/ntp.conf

####  手动同步时间

     ansible all -m command -a "ntpdate 10.0.0.61"








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