I would not suggest defining node names in xCAT which are the same except for case. We do not test that way. Not only DNS, some databases like MySQL do not even accept it as a key in our nodelist table when there is only a case difference in the nodename. You might run into problems in other tools also.
In any case, we did not develop DNS , we only configure the files for
it , if you ran makedns in xCAT. If your DNS does not work with host name
defined the same except for the mixed-case, that is the DNS limitation
( bind rpm) on the OS you are using.
We do try and warn you not to do this, for example.
[manage-02][/etc/xcat]> mkdef Testnodexxxxx groups=new
Warning: The node name 'Testnodexxxxx' contains capital letters which may
not be resolved correctly by the dns server.
But we do create the entry.
[manage-02][/etc/xcat]> lsdef Testnodexxxxx
Object name: Testnodexxxxx
groups=new
postbootscripts=otherpkgs
postscripts=syslog,remoteshell,syncfiles
Lissa K. Valletta
8-3/B10
Poughkeepsie, NY 12601
(tie 293) 433-3102
From: Chris Hardacre <[email protected]>
To: Lissa Valletta/Poughkeepsie/IBM@IBMUS,
<[email protected]>,
Date: 04/07/2014 11:28 AM
Subject: Re: [xcat-user] DNS records ignoring Case (Upper/Lower) from
Node names
Hello Lissa
I have taken over a query from user of ours, "subject" is the same but I
have omitted detail below, I can resend if required.
Basically the user appears to be sticking to his guns and pointing at the
following.
His response:
#########
DNS implementations must match case-insensitively but should preserve case
whenever possible.
See:
http://tools.ietf.org/html/std13 section 3;
http://tools.ietf.org/html/rfc1035 section 2.3.3;
http://tools.ietf.org/html/rfc4343 section 4;
http://tools.ietf.org/html/rfc5936 section 3.4;
and I’m sure its reiterated in some of the other related documents too.
Please re-open your ticket with them with pointers to the above.
##########
There are many mentions of the words "whenever possible" or "In certain
circumstances this cannot be done" or "Loss of case sensitive data must be
minimized" So I agree he should simply use lowercase nodenames, or not
worry about it. Can we have a response along those lines please?
--
Regards,
Chris Hardacre
Linux Support, OCF plc.
Tel: +44 (0)114 257 2200
Fax: +44 (0)114 257 0022
Blog: blog.OCF.co.uk
Twitter: @ocfplc
Please note, any emails relating to an OCF support request must always be
sent to [email protected] for a ticket to be generated or existing support
ticket to be updated. Should this not be done then OCF cannot be held
responsible for requests not dealt with in a timely manner.
OCF plc is a company registered in England and Wales. Registered number
4132533.
Registered office address: OCF plc, 5 Rotunda Business Centre, Thorncliffe
Park, Chapeltown, Sheffield, S35 2PG
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