To add to this, at least at the time there were a number of situations where
applications would fail if there were an underscore in a name. So we added
filtering out _.
This is all rooted in https://tools.ietf.org/html/rfc952 which did not include
_ in the host name.
I have not revisited the state of software in the last few years to determine
if _ is now ok more broadly.
From: Yuan Y Bai <[email protected]>
Sent: Friday, June 22, 2018 1:45 AM
To: [email protected]
Cc: [email protected]
Subject: [External] Re: [xcat-user] xCAT node name invalid characters or hard
code limitations ?
Hi Peter,
1 : is the ‘_’ not allow to use in the compute name ?
'_' is not allowed to use in the compute name.
2: is there any way to make it possible to use the ‘_’ in compute name in xCAT ?
I suggest you not use '_' in compute name, '_' is invalid, if you change
makedns code to let `makedns -n` works, I am not sure if other functions work
well too. If you want to change code, you can enhance this line 440: "unless
($names =~ /^[a-z0-9\. \t\n-]+$/i) {" in /opt/xcat/lib/perl/xCAT_plugin/ddns.pm
Best Regards
--------------------------------------------------
Yuan Bai (白媛)
CSTL HPC System Management Development
Tel:86-10-82451401
E-mail: [email protected]<mailto:[email protected]>
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: peter CZ1 Peng <[email protected]<mailto:[email protected]>>
To: xCAT Users Mailing list
<[email protected]<mailto:[email protected]>>
Cc:
Subject: [xcat-user] xCAT node name invalid characters or hard code limitations
?
Date: Fri, Jun 22, 2018 1:31 PM
Hi ,Dear
I setup the xCAT and see below failed info when try to makedns –n ,can anybody
help to take a look ,thanks
Ignoring line 172.32.44.178 cfdv3_192g_012-bmc cfdv3_192g_012-bmc.cluster in
/etc/hosts, names cfdv3_192g_012-bmc cfdv3_192g_012-bmc.cluster contain
invalid characters (valid characters include a through z, numbers and the '-',
but not '_'
makedns -n ,
[root@mgt ~]# makedns -n
Ignoring line 172.29.101.6 n05_xcc n05_xcc.cluster in /etc/hosts, names
n05_xcc n05_xcc.cluster contain invalid characters (valid characters include a
throug h z, numbers and the '-', but not '_'
Handling n01-xcc in /etc/hosts.
So question is
1 : is the ‘_’ not allow to use in the compute name ?
2: is there any way to make it possible to use the ‘_’ in compute name in xCAT ?
Peter CZ peng
Department :Complex Solution Rack TE
Address:ISH3 Shenzhen
Lenovo China
+86 86361590
+86 18129979128
609 1590
[email protected]<mailto:[email protected]>
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