Hi Yuan, Thanks for your help. I've updated the configuration the way you suggested.
With a single xCAT installation, we manage a relatively large cluster, and we have some long standing NTP servers with very low stratum. However, using xCAT as an interim server increases the stratum and, this is undesirable for us. This is why I wanted to by-pass xCAT's NTP and direct servers to low-stratum internal NTP servers. Directing our nodes directly to NTP servers is currently sufficient for us. Thanks for all the help. Best regards, Hakan On 03/28/2018 05:32 AM, Yuan Y Bai wrote: > Hi Hakan, > > It is possible to define more than one NTP servers in networks table. > You can use `tabedit networks` to edit networks table directly or use > chdef command, for example : chdef -t network mgtnetwork > ntpservers=10.0.0.102,10.0.0.103 > > After you add ntpservers in networks table, you can execute `makedhcp > -n` command, then ntpservers will be updated in dhcp configure files, > for example: > ]# cat /etc/dhcp/dhcpd.conf|grep ntp > option ntp-servers 10.0.0.102, 10.0.0.103; > > *BTW*: What is your user scenario for ntpservers in networks table? > There are another ntp servers attributes in site table: ntpservers and > extntpservers. These 2 attributes are used by `makentp` command and > `setupntp` script. You can also look into these if needed. > > > Best Regards > -------------------------------------------------- > Yuan Bai (白媛) > > CSTL HPC System Management Development > Tel:86-10-82451401 > E-mail: by...@cn.ibm.com > Address: IBM ZGC Campus. Ring Building 28, > ZhongGuanCun Software Park,No.8 Dong Bei Wang West Road, Haidian District, > Beijing P.R.China 100193 > > IBM环宇大厦 > 北京市海淀区东北旺西路8号，中关村软件园28号楼 > 邮编:100193 > > > > ----- Original message ----- > From: "Hakan Bayındır" <hakan.bayin...@tubitak.gov.tr> > To: xCAT User Mailing List <xcat-user@lists.sourceforge.net> > Cc: > Subject: [xcat-user] Defining more than one NTP server. > Date: Mon, Mar 26, 2018 2:36 PM > > Hello all, > > Is it possible to define more than one NTP server in the networks table? > It's defined as NTP servers, but I'm unable to find any details about > the definition syntax in relevant documentation > > (http://xcat-docs.readthedocs.io/en/stable/guides/admin-guides/references/man5/networks.5.html?highlight=ntp). > > Any help will be appreciated, > > Best regards, > > Hakan > -- > *Hakan BAYINDIR* > Başuzman Araştırmacı > Ağ Teknolojileri Birimi > TÜBİTAK ULAKBİM > T.C. Bilim, Sanayi ve Teknoloji Bakanlığı (Eski Bina) > Mustafa Kemal Mahallesi Dumlupınar Bulvarı > (Eskişehir Yolu 7.Km) 2151.Cadde No:154 > ODTÜ Karşısı > 06510 Çankaya, ANKARA > T +90 312 298 9373 > F +90 312 266 5181 > www.ulakbim.gov.tr <http://www.ulakbim.gov.tr> > hakan.bayin...@tubitak.gov.tr > > ................................................................................................................................ > > <http://www.tubitak.gov.tr> > > Sorumluluk Reddi <http://www.tubitak.gov.tr/sorumlulukreddi> > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > xCAT-user mailing list > xCAT-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xcat-user > > > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > > > _______________________________________________ > xCAT-user mailing list > xCAT-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/xcat-user > -- *Hakan BAYINDIR* Başuzman Araştırmacı Ağ Teknolojileri Birimi TÜBİTAK ULAKBİM T.C. Bilim, Sanayi ve Teknoloji Bakanlığı (Eski Bina) Mustafa Kemal Mahallesi Dumlupınar Bulvarı (Eskişehir Yolu 7.Km) 2151.Cadde No:154 ODTÜ Karşısı 06510 Çankaya, ANKARA T +90 312 298 9373 F +90 312 266 5181 www.ulakbim.gov.tr <http://www.ulakbim.gov.tr> hakan.bayin...@tubitak.gov.tr ................................................................................................................................ <http://www.tubitak.gov.tr> Sorumluluk Reddi <http://www.tubitak.gov.tr/sorumlulukreddi> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ xCAT-user mailing list xCAT-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcat-user
