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 <ccaruth...@lenovo.com> 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>
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