linux集群：设置时间同步

野性酷女 2022-03-22 09:52 344阅读 0赞

### 文章目录 ###

*  配置参考
 *  1， 安装ntpd服务
 *   *  a, master 节点: ntpd服务
     *  b, slave节点: ntpdate服务
     *  c, 状态查看
 *  2，使用命令date -s

# 配置参考 #

参考：[https://mp.weixin.qq.com/s/7Lg8pgo1K6x1xEl9oLLf2Q][https_mp.weixin.qq.com_s_7Lg8pgo1K6x1xEl9oLLf2Q]

# 1， 安装ntpd服务 #

集群节点: s101\[192.168.56.111\] --> s102\[192.168.56.112\] --> s103\[192.168.56.113\]  
设置: s101为时间服务器,其他节点同步s101的时间

*  1, 所有节点 ,统一 使用 yum 安装ntp
 *  2, 修改/etc/ntpd.conf

## a, master 节点: ntpd服务 ##

(默认使用外网的时间服务器，可以连外网时不需要修改配置文件)  
当集群不能访问外网： 修改 /etc/ntp.conf

sed '/^server/s/^/#/' /etc/ntp.conf -i
     
    echo " ## 配置自己,充当时间同步服务器 server 127.127.1.0 iburst fudge 127.127.1.0 stratum 10 " >> /etc/ntp.conf
    
    
    ## 修改时区: 中国.上海
    ln -sfT /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
    #修改 ntpd启动参数
    echo "SYNC_HWCLOCK=yes" >>  /etc/sysconfig/ntpd
    #重启ntp, 并设置开机启动：
    service ntpd restart 
    chkconfig ntpd on

## b, slave节点: ntpdate服务 ##

修改 /etc/ntp.conf

echo " ## 配置自己,充当时间同步服务器 server 127.127.1.0 iburst fudge 127.127.1.0 stratum 10 server s101 restrict s101 nomodify notrap noquery # 允许上层时间服务器主动修改本机时间 " >> /etc/ntp.conf
    
    echo  " # master的ip/主机名 s101 " > /etc/ntp/step-tickers
    
    #清空始终漂移位置
     > /var/lib/ntp/drift
    
    
    ## 修改时区: 中国.上海
    ln -sfT /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
    ## 修改 ntpd启动参数
    sed -i 's/SYNC_HWCLOCK=no/SYNC_HWCLOCK=yes/' /etc/sysconfig/ntpdate
    
    ## 重启ntp, 并设置开机启动：
    ntpdate -u s101 #-u 参数：在ntpd 启动时也可以手动同步时间
    service ntpdate restart 
    chkconfig ntpdate on

## c, 状态查看 ##

#查看是否和指定的： 服务器同步(要过一段时间才显示如下，否则显示unsynchronised)
    [test@s101 ~]$ ntpstat 
    unsynchronised
      time server re-starting
       polling server every 8 s
       
    [test@s101 ~]$ ntpstat 
    synchronised to NTP server (185.255.55.20) at stratum 3 
       time correct to within 1084 ms
       polling server every 64 s
       
    [test@s101 ~]$ ntpq -pn
         remote           refid      st t when poll reach   delay   offset  jitter
    ==============================================================================
    *162.159.200.123 10.20.12.67      3 u   42  256  135  159.502  -78.917  28.187
    
    
    ############ 字段说明 #############
    [root@s101  ~]# man ntpq
    ....
    +----------------------+--------------------------------------------------------------------------------------------------------+
       |     Variable         |        Description                                                                                     |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     [tally]          |        single-character code indicating current value of the select field of the peer status word      |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     remote           |        host name (or IP number) of peer                                                                |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     refid            |        association ID or kiss code                                                                     |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     st               |        stratum                                                                                         |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     t                |        u: unicast, b: broadcast, l: local                                                              |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     when             |        sec/min/hr since last received packet                                                           |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     poll             |        poll interval (log2 s)                                                                          |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     reach            |        reach shift register (octal)                                                                    |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     delay            |        roundtrip delay                                                                                 |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     offset           |        offset                                                                                          |
       +----------------------+--------------------------------------------------------------------------------------------------------+
       |     jitter           |        jitter                                                                                          |
       +----------------------+--------------------------------------------------------------------------------------------------------+

# 2，使用命令date -s #

配置crond定时计划，执行以下脚本

for((i=101;i<=103;i++))
    do
            #获取当前机器时间: 年月日， 时分秒
            datestr=` date '+%y-%m-%d %H:%M:%S' `  # 简写为 '+%F %T'
    
            #同步其他主机时间
            echo "ssh s$i date -s--------$datestr $datestr2"
            ssh s$i date -s $datestr
            ssh s$i  hwclock -w    #写入bios
            echo
    done

[https_mp.weixin.qq.com_s_7Lg8pgo1K6x1xEl9oLLf2Q]: https://mp.weixin.qq.com/s/7Lg8pgo1K6x1xEl9oLLf2Q