ubuntu16.02 ntp时钟同步服务设置
1. 首先安装ntp服务（ubuntu 16.02）
在linux的root用户下执行以下命令
yum install ntp –y
（如果是ubuntu系统则执行 apt install yum ntp）
2. 修改ntp配置文件（server）
我们需要在linux集群中找到一台作为ntp服务器的server，其他机器则为ntp的client，因此，在server服务器上修改一下配置文件
执行 vim/etc/ntp.conf
# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
driftfile /var/lib/ntp/ntp.drift
# Enable this if you want statistics to be logged. #statsdir /var/log/ntpstats/
statistics loopstats peerstats clockstats filegen loopstats file loopstats type day enable filegen peerstats file peerstats type day enable filegen clockstats file clockstats type day enable
# Specify one or more NTP servers.
# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board # on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for # more information. #linux自带的时间同步，需要注释掉 #pool 0.ubuntu.pool.ntp.org iburst #pool 1.ubuntu.pool.ntp.org iburst #pool 2.ubuntu.pool.ntp.org iburst #pool 3.ubuntu.pool.ntp.org iburst
# Use Ubuntu's ntp server as a fallback. #pool ntp.ubuntu.com
# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for # details. The web page # might also be helpful. # # Note that "restrict" applies to both servers and clients, so a configuration # that might be intended to block requests from certain clients could also end # up blocking replies from your own upstream servers.
# By default, exchange time with everybody, but don't allow configuration. restrict -4 default kod notrap nomodify nopeer noquery limited restrict -6 default kod notrap nomodify nopeer noquery limited
# Local users may interrogate the ntp server more closely. restrict 127.0.0.1 restrict ::1 #因为是内网，所以用本地时间做为服务器时间，注意这里不是127.0.0.1 server 127.127.1.0 fudge 127.127.1.0 stratum 8
#开放192.168.8.0 整个网段，即在这个网段的所有机器都可以使用 214 作为时间同步服务端
restrict 192.168.0.0 mask 255.255.255.0 nomodify notrap
# Needed for adding pool entries restrict source notrap nomodify noquery
# Clients from this (example!) subnet have unlimited access, but only if # cryptographically authenticated. #restrict 192.168.123.0 mask 255.255.255.0 notrust
# If you want to provide time to your local subnet, change the next line. # (Again, the address is an example only.) #broadcast 192.168.123.255
# If you want to listen to time broadcasts on your local subnet, de-comment the # next lines. Please do this only if you trust everybody on the network! #disable auth #broadcastclient
#Changes recquired to use pps synchonisation as explained in documentation: #http://www.ntp.org/ntpfaq/NTP-s-config-adv.htm#AEN3918
#server 127.127.8.1 mode 135 prefer # Meinberg GPS167 with PPS #fudge 127.127.8.1 time1 0.0042 # relative to PPS for my hardware
#server 127.127.22.1 # ATOM(PPS) #fudge 127.127.22.1 flag3 1 # enable PPS API |
设置完成退出保存，然后重启ntp服务
执行 service ntp restart
3. 修改ntp配置文件（client）
同样的server端已经配置好了，client的配置相对简单
执行 vim /etc/ntp.conf
# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help
driftfile /var/lib/ntp/ntp.drift
# Enable this if you want statistics to be logged. #statsdir /var/log/ntpstats/
statistics loopstats peerstats clockstats filegen loopstats file loopstats type day enable filegen peerstats file peerstats type day enable filegen clockstats file clockstats type day enable
# Specify one or more NTP servers.
# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board # on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for # more information. #linux自带的时间同步，需要注释掉 #pool 0.ubuntu.pool.ntp.org iburst #pool 1.ubuntu.pool.ntp.org iburst #pool 2.ubuntu.pool.ntp.org iburst #pool 3.ubuntu.pool.ntp.org iburst
# Use Ubuntu's ntp server as a fallback. #pool ntp.ubuntu.com
# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for # details. The web page # might also be helpful. # # Note that "restrict" applies to both servers and clients, so a configuration # that might be intended to block requests from certain clients could also end # up blocking replies from your own upstream servers.
# By default, exchange time with everybody, but don't allow configuration. restrict -4 default kod notrap nomodify nopeer noquery limited restrict -6 default kod notrap nomodify nopeer noquery limited
# Local users may interrogate the ntp server more closely. restrict 127.0.0.1 restrict ::1
#增加214作为时间服务器即可 server 192.168.0.214 # Needed for adding pool entries restrict source notrap nomodify noquery
# Clients from this (example!) subnet have unlimited access, but only if # cryptographically authenticated. #restrict 192.168.123.0 mask 255.255.255.0 notrust
# If you want to provide time to your local subnet, change the next line. # (Again, the address is an example only.) #broadcast 192.168.123.255
# If you want to listen to time broadcasts on your local subnet, de-comment the # next lines. Please do this only if you trust everybody on the network! #disable auth #broadcastclient
#Changes recquired to use pps synchonisation as explained in documentation: #http://www.ntp.org/ntpfaq/NTP-s-config-adv.htm#AEN3918
#server 127.127.8.1 mode 135 prefer # Meinberg GPS167 with PPS #fudge 127.127.8.1 time1 0.0042 # relative to PPS for my hardware
#server 127.127.22.1 # ATOM(PPS) #fudge 127.127.22.1 flag3 1 # enable PPS API |
退出保存，重启ntp服务
执行 service ntp restart
4. 查看ntp服务是否配置完成
在ntp sever上执行 ntpq -p
在ntp client上执行 ntpq –p
即完成ntp服务的配置
5. ntp服务的相关命令
service ntpstart 启动
service ntp stop停止
service ntprestart 重新启动