Ubuntu安裝NTP Server很簡單，分位3步走：
第一步：安裝NTP
root@cephadmin:~/ceph-cluster# apt-get install ntp Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: libopts25 Suggested packages: ntp-doc The following NEW packages will be installed: libopts25 ntp 0 upgraded, 2 newly installed, 0 to remove and 217 not upgraded. Need to get 477 kB of archives. After this operation, 1,682 kB of additional disk space will be used. Do you want to continue? [Y/n] y Get:1 http://cn.archive.ubuntu.com/ubuntu/ trusty/main libopts25 amd64 1:5.18-2ubuntu2 [55.3 kB] Get:2 http://cn.archive.ubuntu.com/ubuntu/ trusty-updates/main ntp amd64 1:4.2.6.p5+dfsg-3ubuntu2.14.04.10 [421 kB] Fetched 477 kB in 0s (757 kB/s) Selecting previously unselected package libopts25:amd64. (Reading database ... 55341 files and directories currently installed.) Preparing to unpack .../libopts25_1%3a5.18-2ubuntu2_amd64.deb ... Unpacking libopts25:amd64 (1:5.18-2ubuntu2) ... Selecting previously unselected package ntp. Preparing to unpack .../ntp_1%3a4.2.6.p5+dfsg-3ubuntu2.14.04.10_amd64.deb ... Unpacking ntp (1:4.2.6.p5+dfsg-3ubuntu2.14.04.10) ... Processing triggers for ureadahead (0.100.0-16) ... ureadahead will be reprofiled on next reboot Processing triggers for man-db (2.6.7.1-1) ... Setting up libopts25:amd64 (1:5.18-2ubuntu2) ... Setting up ntp (1:4.2.6.p5+dfsg-3ubuntu2.14.04.10) ... * Starting NTP server ntpd [ OK ] Processing triggers for libc-bin (2.19-0ubuntu6) ... Processing triggers for ureadahead (0.100.0-16) ... root@cephadmin:~/ceph-cluster# service ntp status * NTP server is running
第二步：修改ntp.conf配置文件
1) 添加公網NTP Server
server 120.24.166.46 (阿里雲NTP Server)
2) 允許的NTP Client網段
restrict 10.138.0.0 mask 255.255.0.0 nomodify
# Enable this if you want statistics to be logged. #statsdir /var/log/ntpstats/ #也可以開啟NTP log 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. server 120.24.166.46 # 阿里雲NTP Server server 127.127.1.0 # 如果公網NTP不可用時，將使用Local時間作為NTP服務提供給NTP Client。 # Use Ubuntu's ntp server as a fallback. server ntp.ubuntu.com # Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for # details. The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions> # 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 restrict -6 default kod notrap nomodify nopeer noquery restrict 192.168.20.0 mask 255.255.255.0 nomodify # 允許的NTP Client網段 # Local users may interrogate the ntp server more closely. restrict 127.0.0.1 restrict ::1
第三步：重啟NTP服務，並在客戶端驗證
root@ntpserver:~/ceph-cluster# service ntp restart * Stopping NTP server ntpd [ OK ] * Starting NTP server ntpd [ OK ]
root@ntpclient:/etc/ceph# ntpdate ntpserver 14 Jan 10:55:51 ntpdate[5230]: adjust time server 192.168.20.177 offset 0.209691 sec root@ntpclient:/etc/ceph#
未完待續......