Re: [xcat-user] DNS reverse lookup issues
Hello Christian Caruthers, Thanks for your mail. The feature you asked is not provide by xCAT by default. xCAT only configured BIND 9 to resolve the hostnames and IPs managed in xCAT cluster. In your question, IPv4 address 172.23.100.10 and 192.168.100.10 both belong to Address Allocation for Private Internets defined in RFC 1918. If these two IPv4 addresses are in two different networks and you want two internal DNS servers to do the reverse DNS lookup from each other’s internal database. You have to configue BIND 9 manually. This case is not covered by xCAT default settings. You may refer to The BIND 9 Administrator Reference Manuals [1]. [1] https://www.isc.org/downloads/bind/doc/ GONG Jie (龚颉) China Systems & Technology Lab, Beijing Tel: +86-10-82454979 Email: gong...@linux.vnet.ibm.com Address: Ring Building, No.28, Zhongguancun Software Park, No.8 Dongbeiwang West Road, Haidian District, Beijing, P.R.China 100193 > On Dec 18, 2018, at 06:07, Christian Caruthers wrote: > > Running Version 2.14.1.lenovo2 on RHEL 7.4. > I have the following “external” network defined: > > Object name: DLS > domain=domain.net <http://domain.net/> > gateway=192.168.100.254 > mask=255.255.255.0 > mgtifname=eno1 > nameservers=192.168.100.1 > net=192.168.100.0 > > site.forwarders = 192.168.100.1 > site.domain=cluster.domain.net <http://cluster.domain.net/> > > resolv.conf has the MN as the nameserver: > > domain cluster.domain.net <http://cluster.domain.net/> > search cluster.comain.net <http://cluster.comain.net/> domain.net > <http://domain.net/> > nameserver 172.23.100.10 > > … And for the most part, everything works except reverse lookup for IPs not > managed by this DNS server: > > host mn01 > mn01.cluster.domain.net <http://mn01.cluster.domain.net/> has address > 172.23.100.10 > host 172.23.100.11 > 11.100.23.172.in-addr.arpa domain name pointer n01.cluster.domain.net > <http://n01.cluster.domain.net/>. > > host compnode01.domain.net <http://compnode01.domain.net/> > compnode01.domain.net <http://compnode01.domain.net/> has address of > 192.168.100.11 > > host 192.168.100.10 > host 192.168.100.10.in-addr-arpa. not found: 3(NXDOMAIN) > > host 192.168.100.10 192.168.100.1 > Using domain server: > Name: 192.168.100.1 > Address: 192.168.100.1#53 > Aliases: > > 192.168.100.10.in-addr.arpa domain name pointer mgt01.domain.net > <http://mgt01.domain.net/> > > So, if I give it the remote DNS server, the reverse lookup works. Using the > xCAT MN, reverse lookup only works for internal IPs. > > Regards, > Christian Caruthers > Lenovo Professional Services > Mobile: 757-289-9872 > > ___ > xCAT-user mailing list > xCAT-user@lists.sourceforge.net <mailto:xCAT-user@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/xcat-user > <https://lists.sourceforge.net/lists/listinfo/xcat-user> ___ xCAT-user mailing list xCAT-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcat-user
Re: [xcat-user] Using chrony instead of ntp?
Hello Vinícius Ferrão, Please make sure chronyd is installed on the node you intend to use it. And redo the xCAT ntp setup procedure on that node. For the xCAT management node, do the following, 1. Make sure chronyd is installed on xCAT management node. 2. Run `makentp’ For xCAT compute nodes, do the following, 1. Make sure chronyd is installed on xCAT compute nodes you intend to use chronyd 2. Run `xdsh compute_nodes setupntp’, where compute_nodes is your node range. GONG Jie (龚颉) China Systems & Technology Lab, Beijing Tel: +86-10-82454979 Email: gong...@linux.vnet.ibm.com Address: Ring Building, No.28, Zhongguancun Software Park, No.8 Dongbeiwang West Road, Haidian District, Beijing, P.R.China 100193 > On Nov 29, 2018, at 05:36, Vinícius Ferrão wrote: > > Hello Casandra, > > Thanks for sharing the correct info. In a case of an already deployed xCAT on > RHEL7, is it possible to change it back to chronyd instead of ntpd? > > Which steps are needed? > > Thanks, > > Sent from my iPhone > > On 28 Nov 2018, at 19:24, Casandra H Qiu <mailto:cxh...@us.ibm.com>> wrote: > >> If xCAT found there is chronyd on the system, it will use chrony, otherwise >> it will default back to ntp. >> >> >> Thanks, >> Casandra Qiu >> >> ... >> Casandra Hong Qiu >> Phone: (845) 433-9291, t/l 293-9291 >> Office: Building 8, 3-B-04 >> cxh...@us.ibm.com <mailto:cxh...@us.ibm.com> >> >> >> >> Ryan Novosielski ---11/28/2018 03:49:48 PM---You happen to know >> if this is possible to make use of also on RHEL7 without much fuss? Sent >> from my >> >> From: Ryan Novosielski mailto:novos...@rutgers.edu>> >> To: xCAT Users Mailing list > <mailto:xcat-user@lists.sourceforge.net>> >> Date: 11/28/2018 03:49 PM >> Subject: Re: [xcat-user] Using chrony instead of ntp? >> >> >> >> >> You happen to know if this is possible to make use of also on RHEL7 without >> much fuss? >> >> Sent from my iPhone >> >> On Nov 28, 2018, at 15:16, Casandra H Qiu > <mailto:cxh...@us.ibm.com>> wrote: >> xCAT is modified the code on 2.14.3 to use chrony instead of ntp for RHEL8 >> support. >> >> >> Thanks, >> Casandra Qiu >> >> ... >> Casandra Hong Qiu >> Phone: (845) 433-9291, t/l 293-9291 >> Office: Building 8, 3-B-04 >> cxh...@us.ibm.com <mailto:cxh...@us.ibm.com> >> >> >> >> Kevin Keane ---11/28/2018 02:21:59 PM---xCAT is designed to use >> ntp, of course. But RedHat makes chrony the default (and in the upcoming RHE >> >> From: Kevin Keane mailto:kke...@sandiego.edu>> >> To: xCAT Users Mailing list > <mailto:xcat-user@lists.sourceforge.net>> >> Date: 11/28/2018 02:21 PM >> Subject: [xcat-user] Using chrony instead of ntp? >> >> >> >> >> xCAT is designed to use ntp, of course. But RedHat makes chrony the default >> (and in the upcoming RHEL 8, ntpd will not even be included any more). >> >> What do I need to consider when using chrony instead of ntpd? Obviously, I >> can't run makentp, and would have to configure it manually. Is there >> anything else I need to pay attention to? >> >> Thanks! >> ___ >> Kevin Keane | Systems Architect | University of San Diego ITS | >> kke...@sandiego.edu <mailto:kke...@sandiego.edu> >> Maher Hall, 192 |5998 Alcalá Park | San Diego, CA 92110-2492 | 619.260.6859 >> >> REMEMBER! No one from IT at USD will ever ask to confirm or supply your >> password. >> These messages are an attempt to steal your username and password. Please do >> not reply to, click the links within, or open the attachments of these >> messages. Delete them! >> >> ___ >> xCAT-user mailing list >> xCAT-user@lists.sourceforge.net <mailto:xCAT-user@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/xcat-user >> <https://lists.sourceforge.net/lists/listinfo/xcat-user> >> >> ___ >> xCAT-user mailing list >> xCAT-user@lists.sourceforge.net <mailto:xCAT-user@lists.sourceforge.net> >> https://lists.sourceforge.net/lists/listinfo/xcat-user >> <https://lists.sourceforge.net/lists/listinfo/xcat-user>[attachment >> "graycol
Re: [xcat-user] /var/log/messages not getting forwarded to xCAT management server
Hello Pharthiphan, In order to answer you question, I need the following detail information of your xCAT cluster environment. * The xCAT version you are using * The name and version of the Linux distro you are using on the xCAT management node * The name and version of the Linux distro you are using on the xCAT compute node * The rsyslog configuration files of your management node + File /etc/rsyslog.conf + Everything under /etc/rsyslog.d * The rsyslog configuration files of your compute node + File /etc/rsyslog.conf + Everything under /etc/rsyslog.d GONG Jie (龚颉) China Systems & Technology Lab, Beijing Tel: +86-10-82454979 Email: gong...@linux.vnet.ibm.com Address: Ring Building, No.28, Zhongguancun Software Park, No.8 Dongbeiwang West Road, Haidian District, Beijing, P.R.China 100193 > On Aug 21, 2018, at 16:36, Pharthiphan Asokan wrote: > > /var/log/messages not getting forwarded to xCAT management server > > Please help! > -- > 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
