配置前的几个留神点

自己应用root权限做测试,权限不够自行sudo

零碎时钟设置

# 零碎工夫查看date-------------------------------------------------------------# 零碎工夫设置date -s "YYYY-MM-DD hh:mm:ss"e.g.date -s "2020-10-15 10:20:15"

硬件时钟

# 硬件时钟查看hwclock -----------------------------------------------------------# 硬件时钟同步零碎时钟(改了硬件时钟)hwclock -w-----------------------------------------------------------# 零碎时钟同步硬件时钟(改了零碎时钟)hwclock -h

Ubuntu自带的工夫同步行为

Ubuntu自身自带ntp来更新工夫,如有必要,须要自行敞开
# 敞开自带的更新性能timedatectl set-ntp no  # yes为开启(不胜利就yes/no重复几次)-----------------------------------------------------------# 查看timedatectl性能是否胜利敞开timedatectl status# 后果              System clock synchronized: nosystemd-timesyncd.service active: no                 RTC in local TZ: no

ntp 配置

ntp 装置

# serve(提供同步工夫)端sudo apt-get install ntp  -----------------------------------------------------------# client(申请同步)端sudo apt-get install ntpdate

集群中提供同步(serve)配置

1.配置ntp.conf文件

vim /etc/ntp.conf-----------------------------------------------------------文件两头(批改)# Clients from this (example!) subnet have unlimited access, but only if# cryptographically authenticated.restrict 192.168.50.0 mask 255.255.255.0 nomodify notrip文件任意地位(增加)server 127.127.1.0fudge 127.127.1.0 stratum 10

2.启动ntp服务

/etc/init.d/ntp restart

3.查看服务是否正确启动

watch ntpq -p-------------------------------------------------------------------------------后果相似于:     remote           refid      st t when poll reach   delay   offset  jitter============================================================================== ntp.ubuntu.com  .POOL.          16 p    -   64    0    0.000    0.000   0.000 LOCAL(0)        .LOCL.          10 l  150   64   74    0.000    0.000   0.000+golem.canonical 134.71.66.21     2 u    4   64   75  319.753    8.247  25.024 alphyn.canonica 132.163.96.1     2 u    3   64   17  277.850   30.059  30.159*pugot.canonical 17.253.108.125   2 u    6   64   57  298.084   31.296  35.446+chilipepper.can 17.253.108.253   2 u   13   64   37  313.275   16.580  32.254

集群中申请同步(client)配置

1.应用ntpdate申请服务(服务启动须要一段时间)

ntpdate hadoop0(服务对应域名/ip)------------------------------------------------------------------------------------------16 Oct 23:15:49 ntpdate[6920]: adjust time server 192.168.50.100 offset 0.088294 sec

2.应用crontab实现定时同步申请工作

crontab -e*/1 * * * * /usr/sbin/ntpdate hadoop0

可能呈现的问题

16 Oct 22:59:49 ntpdate[2392]: no server suitable for synchronization found# 这很可能是服务还未启动好,须要急躁期待5-10分钟# 除此之外,还有可能是防火墙/配置文件存在notrust属性# restrict 192.168.50.0 mask 255.255.255.0 notrust