Hi Jing,
The diskless nodes work fine. The only nodes I am having trouble
with is diskful nodes. I am using SLES 11.1.
I know that the hardeths postscript does not have any logic in it to
change /etc/resolv.conf. Is it possible for you to point me to what
script / logic in xCAT populate /etc/resolv.conf for diskful nodes?
I'm unable to find where in xCAT this happens at.
Thanks!
On 1/30/2012 9:03 PM, Jing CDL Sun wrote:
Hi Russell,
I just checked the postscript
hardeths,
it seems it only changes the eth interface config from dhcp to
static,
while not changes /etc/resolv.conf, so I agree with Christopher,
assuming
your problem is just dhcp, not related to hardeths postscript(if
possible,
you could consider to remove hardeths postscript for your
diskful nodes,
and try the install again).
I do not have a diskful SLES
handy,
but only diskless SLES11 SP1 one, I think for dhcp, it might be
the same
logic. but not sure what SLES version are you using? In my
SLES11 SP1 diskless
cluster, the /etc/resolv.conf can be populated correctly, here
is the details,
FYI..
dx360m3n05:~ # cat
/etc/resolv.conf
# Generated by dhcpcd for
interface
eth6
search ppd.pok.ibm.com
nameserver 9.114.34.227
dx360m3n05:~ # cat /etc/*release
SUSE Linux Enterprise Server 11
(x86_64)
VERSION = 11
PATCHLEVEL = 1
dx360m3n05:~ #
To debug your problem, it's better to check:
1. on the mn, /etc/dhcpd.conf,
make
sure it contains the similar lines below in the shared-network
section
for the eth you are using:
option domain-name
"ppd.pok.ibm.com";
option domain-name-servers
9.114.34.227;
2. after the cn is installed and booted, the dhcpcd will get the
domain-name
and domain-name-servers from dhcpsd, and populated
/etc/resolv.conf.
If the dhpcd.conf on your mn is
correct,
then maybe this problem is related to the SLES version you are
using?
Best Regards,
-----------------------------
Sun Jing(孙靖)
IBM China Software Development Laboratory
Tel: (86-10) 82453625 E-mail: [email protected]
Address: Building 28, ZhongGuanCun Software Park,
No.8, Dong Bei Wang West Road, Haidian
District Beijing 100193, PRC
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
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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