zoukankan      html  css  js  c++  java
  • RHEL 7 NTP配置实验

    RHEL 7 NTP配置实验

    系统环境:
    RHEL 7.3 (Maipo) 3.10.0-514.el7.x86_64
    NTP Server IP:192.168.74.130
    NTP Client IP: 192.168.74.131

    一,使用传统NTP服务进行配置
    NTP Server和NTP Client上安装
    1、安装NTP包:

    # yum install -y ntp
    # systemctl enable ntpd            ##开机启用NTP服务
    # systemctl start ntpd             ##启动NTP服务

    2、配置NTP时间同步文件:

    NTP Server

    #vi /etc/ntp.conf              ##添加时间源,如:
    server  133.100.11.8
    fudge   133.100.11.8 stratum 10
    #ntpq -p                    ##查看时间同步进程
    #ntpdate 133.100.11.8          ##手动同步
    #date                         ##查看当前时间    

    NTP Client

    #vi /etc/ntp.conf                    ##添加时间源,如:
    server  192.168.74.130
    fudge   192.168.74.130 stratum 10
    #ntpq -p                                ##查看时间同步进程
    #ntpdate 192.168.74.130        ##手动同步
    #date

    二,使用chrony服务进行配置
    NTP Server和NTP Client上安装
    1、安装chrony包:

    #yum -y install chrony.x86_64
    #systemctl enable chronyd.service    ##开机启用chrony服务
    #systemctl start chronyd.service    ##启动chrony服务

    2、配置NTP时间同步文件:
    NTP Server

    #vi /etc/chrony.conf			##添加时间源,如:
    server  133.100.11.8              iburst
    ......
    allow 192.168.74.131			##允许本地IP地址或网络访问本时钟源
    #systemctl restart chronyd.service	##重启时间同步服务
    #systemctl status chronyd.service	##查看时间同步状态
    #chronyc sources -v			##查看时间同步源
    210 Number of sources = 1
    
      .-- Source mode  '^' = server, '=' = peer, '#' = local clock.
     / .- Source state '*' = current synced, '+' = combined , '-' = not combined,
    | /   '?' = unreachable, 'x' = time may be in error, '~' = time too variable.
    ||                                                 .- xxxx [ yyyy ] +/- zzzz
    ||      Reachability register (octal) -.           |  xxxx = adjusted offset,
    ||      Log2(Polling interval) --.      |          |  yyyy = measured offset,
    ||                                     |          |  zzzz = estimated error.
    ||                                 |    |           
    MS Name/IP address         Stratum Poll Reach LastRx Last sample
    ===============================================================================
    ^* 133.100.11.8                  2   6    37    11   -110us[-3921us] +/-   92ms
    注:带*号表示时间已经同步完成
    
    # chronyc sourcestats -v		##检测上一级时钟源状态
    210 Number of sources = 1
                                 .- Number of sample points in measurement set.
                                /    .- Number of residual runs with same sign.
                               |    /    .- Length of measurement set (time).
                               |   |    /      .- Est. clock freq error (ppm).
                               |   |   |      /           .- Est. error in freq.
                               |   |   |     |           /         .- Est. offset.
                               |   |   |     |          |          |   On the -.
                               |   |   |     |          |          |   samples. 
                               |   |   |     |          |          |             |
    Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  Std Dev
    ==============================================================================
    133.100.11.8               11   7   525     -0.107     18.717  -3914ns  2252us
    
    # timedatectl				##查看日期时间及NTP状态
          Local time: Thu 2017-10-05 13:12:18 CST
      Universal time: Thu 2017-10-05 05:12:18 UTC
            RTC time: Thu 2017-10-05 05:12:18
           Time zone: Asia/Shanghai (CST, +0800)
         NTP enabled: yes
    NTP synchronized: yes
     RTC in local TZ: no
          DST active: n/a
    

    NTP Client

    #vi /etc/chrony.conf			##添加时间源,如:
    server 192.168.74.130  iburst
    #systemctl restart chronyd.service	##重启时间同步服务
    #systemctl status chronyd.service	##查看时间同步状态
    #chronyc sources -v			##查看时间同步源
    210 Number of sources = 1
    
      .-- Source mode  '^' = server, '=' = peer, '#' = local clock.
     / .- Source state '*' = current synced, '+' = combined , '-' = not combined,
    | /   '?' = unreachable, 'x' = time may be in error, '~' = time too variable.
    ||                                                 .- xxxx [ yyyy ] +/- zzzz
    ||      Reachability register (octal) -.           |  xxxx = adjusted offset,
    ||      Log2(Polling interval) --.      |          |  yyyy = measured offset,
    ||                                     |          |  zzzz = estimated error.
    ||                                 |    |           
    MS Name/IP address         Stratum Poll Reach LastRx Last sample
    ===============================================================================
    ^* 192.168.74.130                3   6    17     5    -42us[-1869us] +/-  102ms
    注:带*号表示时间已经同步完成
    
    # chronyc sourcestats -v
    210 Number of sources = 1
                                 .- Number of sample points in measurement set.
                                /    .- Number of residual runs with same sign.
                               |    /    .- Length of measurement set (time).
                               |   |    /      .- Est. clock freq error (ppm).
                               |   |   |      /           .- Est. error in freq.
                               |   |   |     |           /         .- Est. offset.
                               |   |   |     |          |          |   On the -.
                               |   |   |     |          |          |   samples. 
                               |   |   |     |          |          |             |
    Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  Std Dev
    ==============================================================================
    192.168.74.130              6   4   135     -4.794    110.462   -206us  1596us
    
    # timedatectl
          Local time: Thu 2017-10-05 14:06:35 CST
      Universal time: Thu 2017-10-05 06:06:35 UTC
            RTC time: Thu 2017-10-05 06:06:35
           Time zone: Asia/Shanghai (CST, +0800)
         NTP enabled: yes
    NTP synchronized: yes
     RTC in local TZ: no
          DST active: n/a
    

    附:公网NTP服务器IP地址
    ntpdate 133.100.11.8
    ntpdate 132.163.4.101

  • 相关阅读:
    resolv.conf 是什么
    Cloudera Manager Free Edition 4.1 和CDH 4.1.2 简易安装教学
    bach cello
    windows 7 旗舰版 切换 中英文 界面
    geghi 教程 以lesmiserable 为例
    python 使用 tweepy 案例: PS4
    用Live Writer写博文插入程序代码的三个插件比较
    侧滑菜单
    [Android]简略的Android消息机制源码分析
    常用git命令
  • 原文地址:https://www.cnblogs.com/zlg88/p/7629127.html
Copyright © 2011-2022 走看看