Is there an ETA on when xCAT 2.8 will go stable?
On 12/12/2012 6:41 AM, Lissa Valletta
wrote:
The postscripts are run from a
file called mypostscript which has exported many database
attributes including all of the site table. In xCAT 2.8 we
are adding a mypostscript.tmpl, so that you can add any
database attributes you want to be exported for the
postscripts during the install or when you run updatenode.
You can see the design here
along with other performance enhancements.
https://sourceforge.net/apps/mediawiki/xcat/index.php?title=Updatenode_Performance_Enhancements
Lissa K. Valletta
8-3/B10
Poughkeepsie, NY 12601
(tie 293) 433-3102
 "Pocina,
Goran" ---12/11/2012 05:11:46 PM---See questions at end... For
RH & CentOS builds, a profile's kickstart template goes
through macro pr
From: "Pocina, Goran"
<[email protected]>
To: xCAT Users Mailing list
<[email protected]>
Date: 12/11/2012 05:11 PM
Subject: [xcat-user] xCAT db access from
postscripts
See questions at
end…
For RH & CentOS
builds, a profile’s kickstart template goes through macro
processing
that allows it to
access xCAT attribute values.
For a long time it
bugged me that postscripts don’t go through the same macro
processing, until
a colleague pointed
out that it should be possible for postscripts to use curl to
pull any
attributes they need
during the install. Very nice xCAT feature!! Here’s one
possible postscript that could
be called by other
postscripts to load a node’s attributes into the current shell
environment:
/install/postscripts/getnodeattr:
ATTRF=/var/log/xcat/attr.$NODE
mkdir –p $(dirname
$ATTRF)
if [ ! -f $ATTRF ]
; then
curl -k https://$MASTER/xcatws/nodes/$NODE?userName=wsuser&password=wspd > $ATTRF.xml ||
exit 8
fi
# Convert
#
<tr><td>addkcmdline</td><td>sshd</td></tr>
# to
# export
ATTR_addkcmdline="sshd"
#
sed -e
'/^<[/]*table/d' \
-e
"s/<tr><td>/export ATTR_/" \
-e
's;</td><td>;=";' \
-e
's;</td></tr>;";' < ${ATTRF}.xml > $ATTRF
# load into the
environment
. $ATTRF || exit
7
To use this, one
would call: “. /xcatpost/getnodeattr” from
within a postscript. The wsuser user and policy must, of
course, be set up first.
Question 1. Is there
any reason not to use curl and the REST API from postscripts
during an install? Does this duplicate existing xCAT
functionality?
Question 2. It’s
difficult to protect the “wsuser” password coded into
/install/postscripts/getnodeattr. The file can’t be made
read-only root, for example, because httpd needs to be able to
read it. Is there a way to limit “wsuser” to GET calls?
Thanks,
Goran------------------------------------------------------------------------------
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