Hi Srikanth,I've had a customer requirement exactly in this way, and this is now possible in xCAT (make sure you are running at least 2.8.2, where this fix was added)
* Set site.forwarders to your company DNS IPs* add the network for the company in the networks table, making sure that you include the DNS IPs of the company in the nameservers field, and the domain mydom.net in the domain field * Edit /etc/resolv.conf, and add nameservers to be the MN, and the search to be both hpc.mydom.net, and mydom.net
* makedhcp -n; makedhcp -a (Note: makedhcp -n will rewrite the dhcp config) * makedns -n (Note: this will rewrite your internal DNS config)Hopefully, now you should be be able to resolve machines in both hpc.mydom.net and mydom.net
Let me know how it goes, and if I can be of further assistance regards, Arif Ali Senior HPC Technical Architect OCF plc Tel: +44 (0)114 257 2200 Mob: +44 (0)7970 148 122 Fax: +44 (0)114 257 0022 Web: www.ocf.co.uk <http://www.ocf.co.uk> Blog: blog.ocf.co.uk <http://blog.ocf.co.uk> Twitter: @ocfplc <http://twitter.com/#%21/ocfplc>OCF plc is a company registered in England and Wales. Registered number 4132533, VAT number GB 780 6803 14. Registered office address: OCF plc, 5 Rotunda Business Centre, Thorncliffe Park, Chapeltown, Sheffield, S35 2PG.
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On 01/03/14 08:41, Srikanth Gumma wrote:
Hi All, I'm a newbie to xCAT installation.I'm trying to setup xCAT for my hpc cluster. My requirement regarding DNS is little different and hope some one would help me resolve the issue currently I'm facing.I setup the management node with hpc.mydom.net <http://hpc.mydom.net> as my hpc domain. My cluster each node has 3 interfaces private, public and Infiniband respectively. My organization domain is mydom.net <http://mydom.net> which is hosting records for the entire organization and I cannot register all my HPC node names in the same domain. Hence I setup a local DNS in my management node.I want all my compute nodes to resolve all hosts registered under mydom.net <http://mydom.net> aswell as hpc.mydom.net <http://hpc.mydom.net>.To make it simple: mydom.net <http://mydom.net> (NS1) | | hpc.mydom.net <http://hpc.mydom.net> (xcatMGMT) | | nod1.hpc.mydom.net <http://nod1.hpc.mydom.net> (my compute nodes) nod2.hpc.mydom.net <http://nod2.hpc.mydom.net> . . .*Typically I want my nod2.hpc.mydom.net <http://nod2.hpc.mydom.net> to resolve node1.hpc.mydom.net <http://node1.hpc.mydom.net> and licserv1.mydom.net <http://licserv1.mydom.net> both IPs.*What I wanted to do is any name resolution which does not belong to hpc.mydom.net <http://hpc.mydom.net> should forward to mydom.net <http://mydom.net>, but when I verify the configuration I see the zone definition in my xcatMTMT it looks like the below and hence it's not able to resolve licserv1.mydom.net <http://licserv1.mydom.net> IPszone "mydom.net <http://mydom.net>" in { type master; allow-update { key xcat_key; }; file "db.mydom.net <http://db.mydom.net>"; };I understood that my xcatMGMT is thinking that it's master for mydom.net <http://mydom.net>, and due to which the name resolution is not happening for servers such as licserv1.mydom.net <http://licserv1.mydom.net>, etc., I tried to change the DNS configuration manually, but whenever I run makedns it's just overwriting all my previous configuration. Is there any way that I only add new nodes in the hpc.mydom.net <http://hpc.mydom.net> domain and does not overwrite dns configuration?A glance on my site configuration and network configuration is below: # lsdef -t site -i domain,nameservers,forwarders Object name: clustersite domain=hpc.mydom.net <http://hpc.mydom.net> forwarders=172.27.0.252,172.27.0.254 nameservers=192.168.20.1 # lsdef -t network ibnet4,publicnet4,clusternet4 Object name: ibnet4 dhcpserver=192.168.20.1 dynamicrange=192.168.30.88-192.168.30.175 mask=255.255.255.0 mgtifname=eth0 net=192.168.20.0 Object name: publicnet4 dhcpserver=192.168.20.1 domain=mydom.net <http://mydom.net> dynamicrange=10.1.0.11-10.1.0.200 gateway=10.1.0.1 mask=255.255.0.0 mgtifname=eth0 net=10.1.0.0 Object name: clusternet4 dhcpserver=192.168.20.1 domain=hpc.mydom.net <http://hpc.mydom.net> dynamicrange=192.168.20.88-192.168.20.175 mask=255.255.255.0 mgtifname=eth0 net=192.168.20.0 tftpserver=192.168.20.1 Any other suggestions also welcome . Thanks for your guidance in advance. Regards Srikanth Gumma
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