Discuss August 2009

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282 participants
264 discussions

drbd xen question
by Coert Waagmeester 21 Aug '09

21 Aug '09

Hello all, I am running drbd protocol A to a secondary machine to have 'backups' of my xen domUs. Is it necessary to change the xen domains configs to use /dev/drbd* instead of the LVM volume that drbd mirrors, and which the xen domU runs of? regards, Coert

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Running UML on CentOS?
by Dave 21 Aug '09

21 Aug '09

Hello, I've got a CentOS 5.3 machine that i'd like to virtualize some services on. Currently a reinstall for virtualization isn't doable so i thought about user-mode-linux, UML. Has anyone run this on Centos5? If so, feedback prose and cons appreciated. Thanks. Dave.

2 1

centos 5.1 kickstart CD and intel 82576 driver
by aurfalien＠gmail.com 21 Aug '09

21 Aug '09

Hi all, I've got a Centos 5.1 kickstart that I must continue to use. How can I update the kick start image so that it recognizes Intel gigabit 82576 nic? BTW, I compiled the driver I need and have this igb.ko file. How do I incorporate that into my initrd.img file that I see on the kickstart CD that is probably my kickstart boot OS. Thank you very much in advance. aurf -

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Arg... jdk problem on centos 5
by Chuck 21 Aug '09

21 Aug '09

I have downloaded the EE JDK 5.07 for Linux from Sun. If I try and run java_ee_sdk-5_07-linux.bin as a normal user it works fine and I get the gui installer to appear. However if I run it as root, I get this output and then if hangs indefinitely ultimately requiring a kill -9 to stop: [root@canthus Downloads]# ./java_ee_sdk-5_07-linux.bin Checking available disk space... Checking Java(TM) 2 Runtime Environment... Extracting Java(TM) 2 Runtime Environment files... *** glibc detected *** ./java_ee_sdk-5_07-linux.bin: double free or corruption (!prev): 0x092d52a8 *** ======= Backtrace: ========= /lib/libc.so.6[0x5850f1] /lib/libc.so.6(cfree+0x90)[0x588bc0] ./java_ee_sdk-5_07-linux.bin(GetPublicJREPath+0x6df)[0x8054269] ./java_ee_sdk-5_07-linux.bin(main+0x8f8)[0x804e37c] /lib/libc.so.6(__libc_start_main+0xdc)[0x531e8c] ./java_ee_sdk-5_07-linux.bin(dlopen+0x41)[0x804c9f5] ======= Memory map: ======== <SNIP> ffce7000-ffcfc000 rw-p 7ffffffea000 00:00 0 [stack] ffffe000-fffff000 r-xp ffffe000 00:00 0 Deleting temporary files... Any ideas??? Thx

1 0

httpd .htaccess rewrite for images
by Dave 21 Aug '09

21 Aug '09

Hello, I'm running httpd on a Centos 5.3 machine. I'm trying to use .htaccess to disable direct linking to site images. I've got the following rewrite rule, the domain is test.example.com which is at /var/www/test.example.com under which is a directory called images. RewriteEngine on RewriteCond %{HTTP_REFERER} !^$ RewriteCond %{HTTP_REFERER} !^http://(test\.)?example.com/.*$ [NC] RewriteRule \.(jpg|gif)$ - [F] In my httpd virtual host directive i have: alias /images "/var/www/test.example.com/images" <Directory "/var/www/test.example.com/images"> Options None AllowOverride None order allow,deny Allow from all </Directory> Comments appreciated. Thanks. Dave.

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DNS Server Recommendations
by Hugh E Cruickshank 21 Aug '09

21 Aug '09

Hi All: I am looking for some possible recommendations on the handling of our internal DNS services. First some background... Until recently our entire network was located within a single facility with internal DNS services provided by our CentOS 4.7 (using BIND). While I had problems with DHCP/DNS communications it was basically working. At the beginning of the month we moved the production servers (a couple of RHEL5.3 boxes with a Windows 2008 server) to a new facility connected to the old facility via a VPN. We are still running with our DevSys as the DNS server but I would like to make the two locations at least partially independent. I have been doing some research (probably enough to be really dangerous to myself<g>) and it looks like I need to setup a master/slave setup. Here are my questions... 1. Is the BIND master/slave the appropriate approach? 2. Can I have each subnet be a master for itself and a slave for the other subnet? 3. Any pointers to applicable docs/examples? 4. Can you recommend a "front end" for BIND (we have webmin installed but I have yet to start working with it)? Any and all thoughts, suggestions, criticisms gladly accepted. TIA Regards, Hugh -- Hugh E Cruickshank, Forward Software, www.forward-software.com

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Alternative to logwatch
by Developer 20 Aug '09

20 Aug '09

Hello, I am searching an alternative to logwatch. After too much time spent trying to configure it. I have apache log's in different files and directories, for some reason I can not put logwatch to work. Anyone know and alternative? -- -- -- Publicidad y Servicios http://www.pas-world.com Directorio http://www.precioventa.com Tienda http://informatica.precioventa.com/es/ Autoridad certificadora http://ca.precioventa.com/es/ -- --

2 1

needs help about vps
by ann kok 20 Aug '09

20 Aug '09

hi all anyone have experience about vps which one is better? xen vs virtual-box thank you __________________________________________________________________ Looking for the perfect gift? Give the gift of Flickr! http://www.flickr.com/gift/

3 2

what is RAID "background initialization" ??
by mcclnx mcc 20 Aug '09

20 Aug '09

we have DELL server (CENTOS 4.X) with MD1000 connect on it. One of Raid5 (internal 4 disks) has hard disk bad and I replace it. I saw /var/log/messages have following entry: ======================================= Aug 18 15:33:20 host1 Server Administrator: Storage Service EventID: 2049 Array disk removed: Array Disk 0:11 Controller 1, Connector 0 Aug 18 15:34:09 host1 Server Administrator: Storage Service EventID: 2052 Array disk inserted: Array Disk 0:11 Controller 1, Connector 0 Aug 18 15:34:09 host1 Server Administrator: Storage Service EventID: 2065 Array disk Rebuild started: Array Disk 0:11 Controller 1, Connector 0 Aug 19 00:42:58 host1 Server Administrator: Storage Service EventID: 2124 Redundancy normal: Virtual Disk 0 (Virtual Disk 0) Controller 1 (PERC 4e/DC) Aug 19 00:42:58 host1 Server Administrator: Storage Service EventID: 2092 Array disk Rebuild completed: Array Disk 0:11 Controller 1, Connector 0 Aug 19 00:45:53 host1 Server Administrator: Storage Service EventID: 2127 Background Initialization started: Virtual Disk 0 (Virtual Disk 0) Controller 1 (PERC 4e/DC) ============================================= My questions are: 1. why after "disk rebuild" there have "background initialization"? 2. is all kind of configuration (e.g. RAID0, RAID10, ...) need perform "background initialization"? 3. if I run heavy application, will it hurt "background initialization" and "disk rebuild"? Thanks. ___________________________________________________ 您的生活即時通－溝通、娛樂、生活、工作一次搞定！ http://messenger.yahoo.com.tw/

2 1

Funny stuff in SELinux -- /usr/lib/libGL.so.1.2.#prelink#.4GxqM1
by David McGuffey 20 Aug '09

20 Aug '09

Received this SELinux warning: Summary: SELinux is preventing ld-linux.so.2 from loading /usr/lib/libGL.so.1.2.#prelink#.4GxqM1 which requires text relocation. Detailed Description: The ld-linux.so.2 application attempted to load /usr/lib/libGL.so.1.2.#prelink#.4GxqM1 which requires text relocation. This is a potential security problem. Most libraries do not need this permission. Libraries are sometimes coded incorrectly and request this permission. The SELinux Memory Protection Tests (http://people.redhat.com/drepper/selinux-mem.html) web page explains how to remove this requirement. You can configure SELinux temporarily to allow /usr/lib/libGL.so.1.2.#prelink#.4GxqM1 to use relocation as a workaround, until the library is fixed. Please file a bug report (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi) against this package. Allowing Access: If you trust /usr/lib/libGL.so.1.2.#prelink#.4GxqM1 to run correctly, you can change the file context to textrel_shlib_t. "chcon -t textrel_shlib_t '/usr/lib/libGL.so.1.2.#prelink#.4GxqM1'" You must also change the default file context files on the system in order to preserve them even on a full relabel. "semanage fcontext -a -t textrel_shlib_t '/usr/lib/libGL.so.1.2.#prelink#.4GxqM1'" Fix Command: chcon -t textrel_shlib_t '/usr/lib/libGL.so.1.2.#prelink#.4GxqM1' Additional Information: Source Context unconfined_u:system_r:prelink_t:s0 Target Context unconfined_u:object_r:lib_t:s0 Target Objects /usr/lib/libGL.so.1.2.#prelink#.4GxqM1 [ file ] Source ld-linux.so.2 Source Path /lib/ld-2.9.so Port <Unknown> Host desk.mcguffeyfamily.net Source RPM Packages glibc-2.9-3 Target RPM Packages Policy RPM selinux-policy-3.5.13-68.fc10 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name allow_execmod Host Name desk.mcguffeyfamily.net Platform Linux desk.mcguffeyfamily.net 2.6.27.29-170.2.79.fc10.i686 #1 SMP Fri Aug 14 21:11:41 EDT 2009 i686 i686 Alert Count 1 First Seen Wed 19 Aug 2009 08:43:01 PM EDT Last Seen Wed 19 Aug 2009 08:43:01 PM EDT Local ID 194f2933-b29d-4605-9248-a056af793e4d Line Numbers Raw Audit Messages node=desk.mcguffeyfamily.net type=AVC msg=audit(1250728981.756:551): avc: denied { execmod } for pid=7313 comm="ld-linux.so.2" path="/usr/lib/libGL.so.1.2.#prelink#.4GxqM1" dev=sda2 ino=1733603 scontext=unconfined_u:system_r:prelink_t:s0 tcontext=unconfined_u:object_r:lib_t:s0 tclass=file node=desk.mcguffeyfamily.net type=SYSCALL msg=audit(1250728981.756:551): arch=40000003 syscall=125 success=no exit=-13 a0=bd0000 a1=6a000 a2=5 a3=bf974f60 items=0 ppid=7297 pid=7313 auid=500 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts0 ses=84 comm="ld-linux.so.2" exe="/lib/ld-2.9.so" subj=unconfined_u:system_r:prelink_t:s0 key=(null) A few minutes later I got the same warning but it was about SELinux is preventing ld-linux.so.2 from loading /usr/lib/libGL.so.1.2.#prelink#.1brWwM which requires text relocation. I ran rpm -VA and received the following: [root@desk ~]# rpm -Va S.5....T c /etc/printcap .......T c /etc/sysconfig/system-config-users .......T /lib/modules/2.6.27.25-170.2.72.fc10.i686/modules.alias.bin .......T /lib/modules/2.6.27.25-170.2.72.fc10.i686/modules.dep.bin .......T /lib/modules/2.6.27.25-170.2.72.fc10.i686/modules.symbols.bin S.5....T c /etc/login.defs ..5....T c /etc/inittab S.5....T c /etc/cups/classes.conf S.5....T c /etc/cups/printers.conf SM5....T c /etc/cups/subscriptions.conf .......T /lib/modules/2.6.27.29-170.2.79.fc10.i686/modules.alias.bin .......T /lib/modules/2.6.27.29-170.2.79.fc10.i686/modules.dep.bin .......T /lib/modules/2.6.27.29-170.2.79.fc10.i686/modules.symbols.bin S.5....T c /etc/openldap/ldap.conf .M....G. /var/log/gdm .M...... /var/run/gdm ....L... c /etc/pam.d/system-auth S.?..... /usr/lib/libGL.so.1.2 .......T /var/lib/misc/PolicyKit.reload S.5....T c /etc/ppp/chap-secrets S.5....T c /etc/ppp/pap-secrets ..5....T c /usr/lib/security/classpath.security .......T /lib/modules/2.6.27.29-170.2.78.fc10.i686/modules.alias.bin .......T /lib/modules/2.6.27.29-170.2.78.fc10.i686/modules.dep.bin .......T /lib/modules/2.6.27.29-170.2.78.fc10.i686/modules.symbols.bin S.5....T c /etc/libuser.conf ..5....T /etc/cron.d/smolt S.5....T c /var/log/mail/statistics S.5....T c /etc/ldap.conf S.5....T c /etc/sane.d/dll.conf with the following line on the error output: prelink: /usr/lib/libGL.so.1.2.#prelink#.4GxqM1 Could not trace symbol resolving After receiving the second SELinux notice, rpm -Va gave the same results except it referenced .1brWwM prelink: /usr/lib/libGL.so.1.2.#prelink#.1brWwM Could not trace symbol resolving What are the two files: /usr/lib/libGL.so.1.2.#prelink#.4GxqM1 /usr/lib/libGL.so.1.2.#prelink#.1brWwM And what is going on with them? Dave McGuffey

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Discuss August 2009