NTP服务器时间集群借节点之间同步-白红宇

NTP服务器时间集群借节点之间同步

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发布时间：2019-06-18

本文共 2581 字，大约阅读时间需要 8 分钟。

1、三个节点时间同步，cdh1,cdh2,cdh3

2、做法：cdh1从网络时间同步，然后cdh2和cdh3从cdh1节点同步

3、安装与自启动设置

yum install ntp

按上面的安装方式在内网每台节点上都安装好NTP软件包

完成后，都需要配置NTP服务为自启动

chkconfig ntpd on

chkconfig --list ntpd

ntpd 0:关闭 1:关闭 2:启用 3:启用 4:启用 5:启用 6:关闭

如果2,3,4,5都为启动，则正常。

在配置前，先使用ntpdate手动同步下时间，免得本机与外部时间服务器时间差距太大，让ntpd不能正常同步。

ntpdate -u cn.ntp.org.cn

4、配置cdh1的/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 noqueryrestrict -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 127.0.0.1restrict -6 ::1# Hosts on local network are less restricted.# 允许内网其他机器同步时间restrict 192.168.189.0 mask 255.255.255.0 nomodify notrap# Use public servers from the pool.ntp.org project.# Please consider joining the pool (http://www.pool.ntp.org/join.html).server cn.ntp.org.cn perfer#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# 允许上层时间服务器主动修改本机时间restrict cn.ntp.org.cn nomodify notrap noquery# 外部时间服务器不可用时，以本地时间作为时间服务server  127.127.1.0     # local clockfudge   127.127.1.0 stratum 10# Enable public key cryptography.#cryptoincludefile /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

5、启动ntp服务

service ntpd start

启动后，一般需要5-10分钟左右的时候才能与外部时间服务器开始同步时间。

6、通过watch ntpq -p 查看网络ntp服务器