Linux 11G R2 RAC configuration NTP server

11g rac   Configuring the NTP server TIP01 IP:162.20.1.228  NTP service-side TIP02 ip:162.20.1.229   Before the NTP client configures the NTP server, verify that the server is installed with the NTP package [[email protected] ~]# rpm -qa  | grep  ntpntp-4.2.2p1-9.el5_4.1chkfontpath-1.10.1-1.1 then synchronize the server's system clock with the hardware time to see the system first [[email protected] ~]#  date2012 May 20   Sunday  22:07:01 cst view hardware clock [[email protected] ~]# hwclock  May 20, 2012   Sunday  13 33 minutes 46 seconds   -0.415712 seconds here, the system clock is not synchronized with the hardware clock, and we use the following command to synchronize the hardware clock with the system clock [[ EMAIL PROTECTED] ~]# CLOCK --SYSTOHC in view of the system clock with the hardware clock, has been synchronized [[email protected] ~]#  date2012  05 Month 20th   Sunday  22:08:07 CST[[email protected] ~]# hwclock  2012  05 Month 20th   Sunday  22 08 minutes 12 seconds   -0.154372 seconds[[email protected] ~]#   Edit the configuration file for the TIP01 node # vi /etc/ntp.conf restrict default kod nomodify notrap  nopeer noqueryrestrict -6 default kod nomodify notrap nopeer noqueryrestrict 127.0.0.1  restrict -6 ::1server  162.20.1.228     #server    127.127.1.0      #local  clockfudge   127.127.1.0 stratum  10driftfile /var/lib/ntp/driftkeys /etc/ntp/keysrestrict 162.20.1.228  mask  255.255.255.255 nomodify notrap noquery Edit tip02 node ntp.conf file # vi /etc/ntp.conf  server tip01restrict tip01 mask 255.255.255.255 nomodify notrap  Noquery3. Modify the ntpd parameter file on TIP01,TIP02 respectively #vi /etc/sysconfig/ntpdsync_hwclock=yesoptions= "-X -U NTP:NTP  -p /var/run/ntpd.pid "#RAC安装时需要检测的-x parameter # cd /etc/ntp# lskeys  ntpservers   step-tickers# more ntpservers  #This  file contains a list  of ntp servers to show&Nbsp;in the system-config-date user interface. #It  is not recommended  That you modify this file by hand. #添加ntp   server address or host name   TIP01 Note: Note that viewing step-tickers content, if the Step-tickers error also causes NTP to be out of sync # more step-tickers #  in Tip01, Perform chkconfig on TIP02 to enable the NTP service to boot [[email protected] ~]# chkconfig  ntpd on[[email  protected] ~]# chkconfig  ntpd on[[email protected] ~]# service  ntpd restart shutdown  ntpd:[determine]ntpd:  sync time server: [failed] start  ntpd:[OK] Make sure the port is open UDP. [[email protected] ~]# netstat -an |grep 123udp         0      0 192.168.99.228:123           0.0.0.0:*                       &Nbsp;        udp        0       0 162.20.1.228:123             0.0.0.0:*                                 udp        0      0  127.0.0.1:123               0.0.0.0 :*                                 udp         0      0 0.0.0.0:123                  0.0.0.0:*                                 udp        0      0 : :1:123                      :::*                                       udp        0       0 fe80::250:56ff:fe9d:123     :::*                                       udp        0       0 :::123                       :::* View NTP status [[email protected] ~]#  Ntpstat synchronised to local net at stratum 11    time  correct to within 11 ms   polling server every 1024  s start NTP service [[email protected] ~]# service ntpd startntpd:  sync time server on TIP02 node: [OK ] Sync hardware clock to system clock  [OK] start  ntpd:[OK] switch to the pre-provisioned grid user to verify the two-node time [[email protected] ~]$ ssh  tip01 date2012  05 month  20 day   Sunday  22:21:46 CST[[email protected] ~]$  ssh tip02 date2012  05 month  20 day   Sunday  22:21:48 cst[[email protected] ~] $

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