Discuss April 2011

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312 participants
282 discussions

virtmanager and selinux
by Negative 13 Apr '11

13 Apr '11

I built a new VM under KVM today and I've been getting a slew of message that selinux is blocking virtmanager from reading the new image. This doesn't seem to be doing any harm, but I wanted to check whether I should simply run chcon on the image (if I can). Virtmanager show up as usr_t, as do my other vm images, but the new one is svirt_image_t. The selinux error says it denied a read access to virtmanager but that it is not expected that the access is required. I tried running restorecon as root, as suggested by the selinux error, but I'm getting a permission-denied error there. (It tries to set the context to usr_t) Thanks in advance

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5.5->5.6 upgrade hiccough
by Devin Reade 13 Apr '11

13 Apr '11

I spoke a bit too soon about the upgrade being flawless. It turns out that one subsystem started failing after the upgrade, although it is not an out-of-the-box one. I've included the description here in case someone runs into something similarly weird (especially with scripts calling MySQL?) and because although I have a work-around, I'm not sure (but can guess) as to the actual cause of the change. This subsystem is on a pacemaker/corosync cluster, which as one resource group is running a resource agent (RA) for a bacula-fd instance. (The bacula-fd RA takes care of backing up those DRBD-mounted filesystems that are part of the resource group.) The bacula-fd was failing because as a run-before command on the backup job, it was executing the mysqlblasy.pl script to back up some MySQL databases. After the upgrade, mysqlblasy.pl started failing when running from bacula-fd, even though it could be run directly as root. However, *none* of these components were upgraded during the 5.5->5.6 OS upgrade: mysql server & client mysqlblasy.pl bacula daemons/clients bacula RA pacemaker/corosync After suitable diagnosis, I was able to determine that with CentOS 5.5, the environment provided to the RA had $HOME set, but that with CentOS 5.6 $HOME was *not* set. In particular, since this RA runs as root, in 5.5 HOME was set to "/" (as opposed to "/root"). Since there was no change to pacemaker, I suspect that there was either a change in the way daemons are started up, or a change to the fork or set[re]uid model (or something similar). Ensuring that HOME was (re)set properly before invoking mysqlblasy.pl caused the backups to work again as expected. Devin

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Got no login screen with the new 5.6 kernel
by Stanley A. Klein 12 Apr '11

12 Apr '11

I did the 5.6 update yesterday. When I started the machine today, I did not get a login screen -- it was just a blank screen with no cursor or anything. I shut down, restarted and when grub came up selected the previous kernel. The system came up as usual, presented a login screen, and is working OK. There is apparently something buggy related to the new kernel (2.6.18-238.5.1.el5). Stan Klein --

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Re: [CentOS] GUI Software Raid Monitor Software
by jvalidolnx＠juanyjosefina.com 12 Apr '11

12 Apr '11

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CentOS-announce Digest, Vol 74, Issue 3
by centos-announce-request＠centos.org 12 Apr '11

12 Apr '11

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. CESA-2011:0422 Moderate CentOS 4 i386 postfix - security update (CENTOSPLUS Only) (Tru Huynh) 2. CESA-2011:0422 Moderate CentOS 4 x86_64 postfix - security update (CENTOSPLUS Only) (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Tue, 12 Apr 2011 12:20:05 +0200 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2011:0422 Moderate CentOS 4 i386 postfix - security update (CENTOSPLUS Only) To: centos-announce(a)centos.org Message-ID: <20110412102005.GC24978(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2011:0422 (CENTOSPLUS Only) postfix security update for CentOS 4 i386: https://rhn.redhat.com/errata/RHSA-2011-0422.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: centosplus/i386/RPMS/postfix-2.2.10-1.4.el4.centos.mysql_pgsql.plus.i386.rpm centosplus/i386/RPMS/postfix-pflogsumm-2.2.10-1.4.el4.centos.mysql_pgsql.plus.i386.rpm source: centosplus/SRPMS/postfix-2.2.10-1.4.el4.centos.mysql_pgsql.plus.src.rpm You may update your CentOS-4 i386 installations by running the command: yum update postfix Tru -- Tru Huynh (mirrors, CentOS i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

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Best configuration for /var/www/html/
by Todd Cary 12 Apr '11

12 Apr '11

For a long period of time, my Apache root directory has been /home/httpd. For security reasons, this is not so good as SELinux has informed me. Now all of the files have been copied to /var/www/etc with owner and group "root". The privileges are 754 (rwxr-xr--), however apache does not have access to them. Should the owner be apache? Group? Todd -- Ariste Software Petaluma, CA 94952 http://www.aristesoftware.com

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ksign: module signed with unknown public key
by Lars Hecking 12 Apr '11

12 Apr '11

What's the correct way to deal with this? I've rebuilt a kernel with an additional patch for one particular module, but I'm trying to load the new module into a distribution kernel. I'm not planning to roll out the updated kernel package. ksign: module signed with unknown public key - signature keyid: 92548f4d5c9c37ab ver=3 I know I can remove module_sig as a workaround. --------------------------------------------------------------- This message and any attachments may contain Cypress (or its subsidiaries) confidential information. If it has been received in error, please advise the sender and immediately delete this message. ---------------------------------------------------------------

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KVM resources?
by Jussi Hirvi 12 Apr '11

12 Apr '11

Later this week I will have to install a serious KVM setup, and I am looking for background material. I found a nice how-to: http://wiki.centos.org/HowTos/KVM ...but it is probably partly outdated by now. Then there is a fine virtualization manual: http://www.centos.org/docs/5/html/5.2/Virtualization/ ...but it seems to be only for xen. I plan to use either CentOS 5.6 or Scientific Linux 6.0 as the host system. Though I don't know yet, if v6.0 will bring any actual benefits over 5.6. My guests will all be CentOS 4 or 5. Disk I/O will probably be a potential bottleneck. I am interested in the "block device" strategy, and could use more info about it. - Jussi -- Jussi Hirvi * Green Spot Topeliuksenkatu 15 C * 00250 Helsinki * Finland Tel. +358 9 493 981 * Mobile +358 40 771 2098 (only sms) jussi.hirvi(a)greenspot.fi * http://www.greenspot.fi

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updates to package
by Bernard Fay 12 Apr '11

12 Apr '11

Hi, I'ld like to know where or how I can find changes in a package update. Also, is there a way to find out which package updates are security updates? thanks -- Bernard

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KVM problem after update to 5.6
by Riccardo Veraldi 12 Apr '11

12 Apr '11

Hello, after updating to Cents 5.6 and so to kvm-83-224 my KVM virtual machines qemu qcow2 based images do not start anymore. Looking at VM console the error message is that VM media is not bootable. Going back to previous KVM version kvm-83-164 from Centos 5.5 they works again. What's wrong with qemu images ? anyone has an idea on how to fix the problem ? thanks Rick

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Discuss April 2011