Discuss December 2012

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146 participants
122 discussions

iSCSI Question
by Steven Crothers 04 Dec '12

04 Dec '12

Hey everyone, Is anybody aware of a /true/ active/active multi-head and multi-target clustered iSCSI daemon? IE: Server 1: Hostname: host1.test.com IP Address: 10.0.0.1 Server 2: Hostname: host2.test.com IP Address: 10.0.0.2 Then they would utilize a CLVM disk between them, let's call that VG "disk" and then directly map each LUN (1,2,3,4,etc) to LV's named 1,2,3,4,... and so on. That would essentially make both host1 and host2 identical iSCSI targets. So I could hook up 30 servers to each LUN on each host1 and host2 (assuming those block devices had a cluster aware filesystem on them). However, what I wan't to accomplish is true active/active MPIO utilizing the dm driver to combine LUN 1 from both host1 and host2 as a single /dev/dm-0 device in active/active mode. This would allow me to multipath across multiple fabrics, develop true high availability and increase my throughput significantly. Any idea of an iscsi tgtd that supports this? As far as I can tell, none do (that I can find). I know some proprietary vendors have this type of functionality, which may or may not be using iSCSI code (but that's a whole set of arguments for later..). Ultimately, my goal is this. I want to take my existing Ceph cluster, expose a handful of RBDs from it to two iSCSI heads running C6 or RHEL6 or what have you, so I can use my inexpensive storage built on Linux -- for my Windows 2008 machines. Thoughts? Steven Crothers steven.crothers(a)gmail.com

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How to configure sendmail
by Todd Cary 04 Dec '12

04 Dec '12

In reading my Linux Admin books and looking at the help files I am confused about what entries to enter into sendmail.mc. To date I have not had to configure sendmail since I use a class in PHP that is straight, however I am learning how to use Concrete5 for my local Rotary club and it apparently needs sendmail. My smtp provider is smtp.sonic.net and it requires user name and password. Is there a simple example that could guide me on setting the parameters in sendmail.mc? I believe doing the "make" after is straight forward. Todd -- Ariste Software Bend, OR 97702 http://www.aristesoftware.com

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Extending schema on Centos DS
by Chris Taylor 03 Dec '12

03 Dec '12

I am running CentOS DS server (version 8.1.0) in a mixed master setup. I am looking for the best way to extend the schema without breaking replication? I was successfully able to extend the schema on my two servers manually but replication broke after a restart of dirsrv. [03/Dec/2012:11:04:17 -0400] NSMMReplicationPlugin - agmt="cn=web-ldap02" (web-ldap02:389): Unable to acquire replica: there is no replicated area "dc=eastlink,dc=ca" on the consumer server. Replication is aborting. [03/Dec/2012:11:04:17 -0400] NSMMReplicationPlugin - agmt="cn=web-ldap02" (web-ldap02:389): Incremental update failed and requires administrator action [03/Dec/2012:11:04:17 -0400] NSMMReplicationPlugin - agmt="cn=web-ldap02-NetscapeRoot" (web-ldap02:389): Unable to acquire replica: there is no replicated area "o=netscaperoot" on the consumer server. Replication is aborting. What is the correct way to extend the schema on a MMR setup, I haven't been able to find much on the subject? Thanks, Chris

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XFCE4 group missing on Centos 5.x?
by Keith Roberts 03 Dec '12

03 Dec '12

I had XFCE group installed and working on C5.8 32 bit. I have done a fresh installation using the C 5.5 DVD. I cannot seem to find the XFCE group now. Has this been removed from Centos 5.x ? TIA Keith ----------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------

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matplotlib pygtk version problem
by tacolijst list 03 Dec '12

03 Dec '12

Hello, Anybody a solution for the following problem: the matplotlib library for Python in Centos 6.3 crashes my application because of a deprecated PyGtk2 version. Can be easily reproduced: installation of python 2.6.6 with matplotlib Type in the python shell: from pylab import plot plot([0,1],[0,1]) Error: /usr/lib64/python2.6/site-packages/matplotlib/backends/backend_gtk.py:621: DeprecationWarning: Use the new widget gtk.Tooltip self.tooltips = gtk.Tooltips() self.tooltips = gtk.Tooltips() Fatal Python error: GC object already tracked Aborted (core dumped) Looks like it has to do with the ridiculous old PyGtk version 2.16 which should be >2.2 for matplotlib any solutions? Taco Walstra University of Amsterdam

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CentOS 6.3 - KDE login screen configuration problems
by John Horne 03 Dec '12

03 Dec '12

Hello, We generally use CentOS for some servers, and so do not use a GUI interface. However, I have recently installed CentOS 6.3 onto a PC with KDE. I am familiar with KDE as I use it with Fedora for my work PC. The problem is that we would like to configure the login screen, so that it does not show the user list, that it does not allow the shutdown or reboot commands (from the login screen), and if possible to remove the 30 second confirmation timer that occurs when logout (via 'leave') is selected. I have gone into the 'System settings->Advanced->Login screen', and disabled both local and remote shutdowns and reboots. I have also disabled the showing of the user list, and disabled logout confirmations. However, none of this has had any effect. The login screen remains the same - showing the userlist and shutdown/reboot commands, and logging out still shows the 30 second confirmation timer. I have compared the /etc/kde/kdm/kdmrc file from the CentOS PC to my Fedora PC and they are similar. (I make the same changes to my work PC, and these take effect.) Anyone any ideas about this? Thanks, John. -- John Horne Tel: +44 (0)1752 587287 Plymouth University, UK Fax: +44 (0)1752 587001

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Re: [CentOS] CentOS 6.3 - KDE login screen configuration problems
by Scot P. Floess 02 Dec '12

02 Dec '12

Just create the file /etc/sysconfig/desktop and put in it: DESKTOP=KDM I believe it's DESKTOP - you can dbl check /etc/X11/prefdm Sent from my phoneMike Watson <mikew(a)crucis.net> wrote:The last reply to this subject said to modify /etc/sysconfig/desktop to change GDM to KDM. This would then enable the KDE login screen instead of the default Gnome. However, when I checked my CentOS 6.3 system, there was no such file, no /etc/sysconfig/desktop. I've not been able to find any method to enable KDE login in 6.3. The method mentioned in the earlier reply was for CentOS 5, not 6. Any further suggestions? mw -- -- "Lose not thy airspeed, lest the ground rises up and smites thee." -- William Kershner http://crucis-court.com http://www.crucis.net/1632search _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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Re: [CentOS] CentOS 6.3 - KDE login screen configuration problems
by Mike Watson 01 Dec '12

01 Dec '12

The last reply to this subject said to modify /etc/sysconfig/desktop to change GDM to KDM. This would then enable the KDE login screen instead of the default Gnome. However, when I checked my CentOS 6.3 system, there was no such file, no /etc/sysconfig/desktop. I've not been able to find any method to enable KDE login in 6.3. The method mentioned in the earlier reply was for CentOS 5, not 6. Any further suggestions? mw -- -- "Lose not thy airspeed, lest the ground rises up and smites thee." -- William Kershner http://crucis-court.com http://www.crucis.net/1632search

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CentOS-announce Digest, Vol 94, Issue 1
by centos-announce-request＠centos.org 01 Dec '12

01 Dec '12

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CEBA-2012:1513 CentOS 5 rgmanager Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Fri, 30 Nov 2012 13:12:20 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2012:1513 CentOS 5 rgmanager Update To: centos-announce(a)centos.org Message-ID: <20121130131220.GA17338(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2012:1513 Upstream details at : https://rhn.redhat.com/errata/RHBA-2012-1513.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 440cf2fb7cdd535240f0a464e3d785d221ed68ed7b0b1f89bacc9a76da976fbd rgmanager-2.0.52-29.el5.centos.5.i386.rpm x86_64: 252763257b44e5f554373d0e893aced1280c4f05302c33d9527b089fa234386c rgmanager-2.0.52-29.el5.centos.5.x86_64.rpm Source: 40f0b1ef049056b6237a02d90bfde461d4bf6e7f4fab1df853e8123f42eb1456 rgmanager-2.0.52-29.el5.centos.5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 94, Issue 1 **********************************************

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Possible repo polllution
by Tony Molloy 01 Dec '12

01 Dec '12

Hi, I've just been checking my local copy of the CentOS repos. I found 200+ i386/i686 packages in both the updates/5/RPMS and updates/6/Packages directories. I checked with my rsync site ( ftp.heanet.ie ) and the equivalent UK site ( ftp.mirrorservice.org ) and they both carried these packages also. Is this a case a repo pollution, it can't be necessary to have i386 packages in the x86_64 updates. Just checking before I delete these packages. Thanks. Tony

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Discuss December 2012