biolocal:Ntpservers
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| == Cluster nodes ntp server == | == Cluster nodes ntp server == | ||
| - | Cluster nodes ntp server is '''ntp.computing.ceinge.unina.it''' (=ceingeauth01) | + | Differently from other machines, cluster nodes are synchronized by using ''ntpdate'' and no deamon ntpd is necessary. |
| - | + | Cluster nodes ntp server is '''ntp.computing.ceinge.unina.it''' (=ceingeauth01) and they are synchronized by cron through a script (/etc/cron.hourly/ntpdate.cron) launche hourly. | |
| [node~]# cat /etc/cron.hourly/ntpdate.cron | [node~]# cat /etc/cron.hourly/ntpdate.cron | ||
Revision as of 16:46, 10 November 2009
Ceinge NTP servers
Ceinge NTP servers are:
- ntp1.ceinge.unina.it (=ceingeauth01)
- ntp2.ceinge.unina.it (=ceingeauth02).
- ntp.ceinge.unina.it (=pc-network): OLD, will be dismissed
- ntp.computing.ceinge.unina.it (=bpe): OLD, it has been dismissed
ntp1 and ntp2 are configured as follows, in the /etc/ntpd.conf file
# restriction to CEINGE DBBM network only restrict 143.225.151.0 mask 255.255.255.0 nomodify notrap restrict 192.168.0.0 mask 255.255.0.0 nomodify notrap restrict 143.225.208.0 mask 255.255.255.0 nomodify notrap restrict 143.225.149.0 mask 255.255.255.0 nomodify notrap
# servers used for clock sync server 0.it.pool.ntp.org server 1.it.pool.ntp.org server 2.it.pool.ntp.org server 3.it.pool.ntp.org server 0.centos.pool.ntp.org server 1.centos.pool.ntp.org server 2.centos.pool.ntp.org
# restriction for limiting remote servers access restrict 0.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery restrict 1.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery restrict 2.centos.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery restrict 0.it.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery restrict 1.it.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery restrict 2.it.pool.ntp.org mask 255.255.255.255 nomodify notrap noquery
NTP client configuration
In order to use them, in the client /etc/ntp.conf file, comment all other servers and add the lines:
server ntp1.ceinge.unina.it server ntp2.ceinge.unina.it restrict ntp1.ceinge.unina.it mask 255.255.255.255 nomodify notrap noquery restrict ntp2.ceinge.unina.it mask 255.255.255.255 nomodify notrap noquery
Cluster nodes ntp server
Differently from other machines, cluster nodes are synchronized by using ntpdate and no deamon ntpd is necessary. Cluster nodes ntp server is ntp.computing.ceinge.unina.it (=ceingeauth01) and they are synchronized by cron through a script (/etc/cron.hourly/ntpdate.cron) launche hourly.
[node~]# cat /etc/cron.hourly/ntpdate.cron #!/bin/sh /usr/sbin/ntpdate -s -b -p 8 -u ntp.computing.ceinge.unina.it
