Some additional information, this looks like it may be limited to
just SLES in this case. I deployed a CentOS 5.6 node with the
hardeths postscript and /etc/resolv.conf was populated properly. No
other changes were made to the node outside of changing the OS to
deploy.
I noticed that "/opt/xcat/share/xcat/install/scripts" has a few
scripts that set resolv.conf. For example:
xcat-suse:/opt/xcat/share/xcat/install/scripts # grep -i resolv
*
post.debian:echo "search #TABLE:site:key=domain:value#"
>/etc/resolv.conf
post.debian:done >>/etc/resolv.conf
post.esx:echo "search #TABLE:site:key=domain:value#"
>/etc/resolv.conf
post.esx:done >>/etc/resolv.conf
post.esx:cat /etc/resolv.conf
post.rh.iscsi:echo "search #TABLE:site:key=domain:value#"
>/etc/resolv.conf
post.rh.iscsi:done >>/etc/resolv.conf
post.ubuntu:echo "search #TABLE:site:key=domain:value#"
>/etc/resolv.conf
post.ubuntu:done >>/etc/resolv.conf
Given that neither centos nor sles seem to have a default postscript
that set this (aside from the rh.isci one?), I am unsure what
mechanism xCAT is relying on to define the nameserver configuration
for diskfull nodes. If you could shine some light on where this can
be found, it may help me better track down why CentOS nodes are
working but SLES nodes are not.
Thanks again!
On 1/29/2012 10:24 AM, Russell Jones wrote:
Thanks Lisa,
I have checked my tables again against option #1 in that page you
provided and everything seems correct. See below for my site
table attributes. Here's a bit more info on what's going on:
Both diskless and diskfull nodes are booting and acquiring their
/etc/resolv.conf without an issue as long as they are using DHCP.
"makehosts", "makedns", and "makedhcp" all work and populate the
various files correctly with no errors. It's when I add the
"hardeths" postscript in that diskfull nodes only lose
their DNS configuration. IP and subnet gets set correctly for the
nodes, it's just /etc/resolv.conf that is empty.
The following is the /etc/resolv.conf of a diskless node after it
was booted with the hardeths postscript. As you can see it
appears it still keeps the DNS config from when DHCP ran on it
prior to the interface being turned into a static one:
c1n1:~ # cat /etc/resolv.conf
# Generated by dhcpcd for interface eth0
search site.local
nameserver 192.168.1.1
Here is his xCAT configuration after I have told it to install:
xcat-suse:/var/log # nodeset c1n1 install
c1n1: install sles11.1-x86_64-compute
c1n1: install sles11.1-x86_64-compute
xcat-suse:/var/log # lsdef c1n1
Object name: c1n1
arch=x86_64
currchain=boot
currstate=install sles11.1-x86_64-compute
groups=all
initrd=xcat/sles11.1/x86_64/initrd
ip=192.168.1.200
kcmdline=autoyast=http://service01/install/autoinst/c1n1
install=http://service01/install/sles11.1/x86_64/1
kernel=xcat/sles11.1/x86_64/linux
mac=00:50:56:11:44:33
netboot=pxe
nfsserver=service01
os=sles11.1
postbootscripts=otherpkgs
postscripts=syslog,remoteshell,syncfiles,hardeths
profile="">
provmethod=install
servicenode=service01
status=booted
statustime=01-29-2012 15:45:24
And here is his /etc/resolv.conf after installing:
c1n1:~ # cat /etc/resolv.conf
### /etc/resolv.conf file autogenerated by netconfig!
#
# Before you change this file manually, consider to
define the
# static DNS configuration using the following
variables in the
# /etc/sysconfig/network/config file:
# NETCONFIG_DNS_STATIC_SEARCHLIST
# NETCONFIG_DNS_STATIC_SERVERS
# NETCONFIG_DNS_FORWARDER
# or disable DNS configuration updates via netconfig
by setting:
# NETCONFIG_DNS_POLICY=''
#
# See also the netconfig(8) manual page and other
documentation.
#
# Note: Manual change of this file disables netconfig
too, but
# may get lost when this file contains comments or
empty lines
# only, the netconfig settings are same with settings
in this
# file and in case of a "netconfig update -f" call.
#
### Please remove (at least) this line when you
modify the file!
c1n1:~ # host xcat-suse
;; connection timed out; no servers could be reached
The "NETCONFIG_DNS_STATIC_SERVERS" attribute it is mentioning
above is also empty.
The hardeths postscript does work as designed however:
c1n1:/etc/sysconfig/network # cat
ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
STARTMODE=onboot
DHCLIENT_PRIMARY_DEVICE=yes
IPADDR=192.168.1.200
NETMASK=255.255.255.0
Unless I am missing something, I am just not seeing anything
generated in the autoinst file that would fill /etc/resolv.conf in
for the case of diskfull nodes not utilizing DHCP.
I can always just write a postscript that fills in the DNS
attributes in /etc/resolv.conf (and have seen other sites do the
same), but I wasn't sure if keeping the DNS configuration when
using the hardeths postscript was supposed to be a built-in,
working functionality with 2.6 when utilizing the management node
as the DNS server.
Here are my site table attributes:
xcat-suse:~ # tabdump site
#key,value,comments,disable
"blademaxp","64",,
"fsptimeout","0",,
"installdir","/install",,
"ipmimaxp","64",,
"ipmiretries","3",,
"ipmitimeout","2",,
"consoleondemand","no",,
"master","192.168.1.1",,
"forwarders","172.16.99.1",,
"nameservers","192.168.1.1",,
"maxssh","8",,
"ppcmaxp","64",,
"ppcretry","3",,
"ppctimeout","0",,
"powerinterval","0",,
"syspowerinterval","0",,
"sharedtftp","0",,
"SNsyncfiledir","/var/xcat/syncfiles",,
"tftpdir","/tftpboot",,
"xcatdport","3001",,
"xcatiport","3002",,
"xcatconfdir","/etc/xcat",,
"timezone","America/New_York",,
"useNmapfromMN","no",,
"enableASMI","no",,
"db2installloc","/mntdb2",,
"databaseloc","/var/lib",,
"sshbetweennodes","ALLGROUPS",,
"dnshandler","ddns",,
"vsftp","y",,
"cleanupxcatpost","no",,
"domain","site.local",,
"installloc","xcat-suse:/install",,
xcat-suse:~ # ifconfig
eth0 Link encap:Ethernet HWaddr
00:0C:29:59:87:B0
inet addr:172.16.99.234
Bcast:172.16.99.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500
Metric:1
RX packets:26412 errors:0 dropped:0
overruns:0 frame:0
TX packets:21189 errors:0 dropped:0
overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2510431 (2.3 Mb) TX bytes:3681162
(3.5 Mb)
eth1 Link encap:Ethernet HWaddr
00:0C:29:59:87:BA
inet addr:192.168.1.1 Bcast:192.168.1.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500
Metric:1
RX packets:552754 errors:0 dropped:0
overruns:0 frame:0
TX packets:2447039 errors:0 dropped:0
overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:38007415 (36.2 Mb) TX
bytes:3647660521 (3478.6 Mb)
On 1/29/2012 5:39 AM, Lissa Valletta wrote:
The mkresolvconf script was written to support the Service Node move
function we now support in hiearchical clusters. It was not written for
basic setup during install. There was a big change for Name resolutions
from 2.3 to 2.6. We no longer use bind but have replaced it with ddns.
Could you check you setup based on this documentation:
http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Cluster_Name_Resolution
IF you note in the doc "The resolv.conf files for the compute nodes will be
created automatically using the "domain" and "nameservers" values set in
the site definition. " Need to check your site table attributes.
Lissa K. Valletta
2-3/T12
Poughkeepsie, NY 12601
(tie 293) 433-3102
From: Russell Jones <[email protected]>
To: xCAT Users Mailing list <[email protected]>
Date: 01/27/2012 05:42 PM
Subject: [xcat-user] Diskfull nodes and resolv.conf
Hi all,
I am comparing the autoinst files generated between xcat 2.3 and 2.6,
and it appears that at one point (xcat 2.3) the /etc/resolv.conf was
filled in via the "/opt/xcat/sbin/makenamed.conf" file. Looking at the
autoinst files in 2.6, while this file exists the autoinst files being
generated do not contain any entries for placing data in
/etc/resolv.conf. As a result, if I use the "hardeths" script the node
has no DNS information configured.
I did however see that there is now a postscript named "mkresolvconf"
that seems to take care of this. Is this the preferred method now of
configuring a static IP and DNS information on a node (hardeths +
mkresolvconf)?
Thanks!
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