- Discuss - lists.centos.org

PCI-X/PCIe RAID controller.
by Drew 10 Apr '11

10 Apr '11

Afternoon, I've got an old Dell PERC 4DC (PCI 64bit/33MHz) sitting in my home rig and with a new board on the way that has PCI-X (133) and PCIe (x4) slots, I was wondering what people would recommend for a cheap hardware parallel SCSI RAID controller (no fake raid please) that is relatively cheap but faster then the old PERC? I'm looking for something cheap that'll do RAID-10 but bonus points if it does RAID-5/6. :-) -- Drew "Nothing in life is to be feared. It is only to be understood." --Marie Curie

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CentOS ToDo Item - For the Wiki - Hosting Control Panels - Help?
by Mister IT Guru 10 Apr '11

10 Apr '11

Dear List, I've taken a look at the TODO page http://wiki.centos.org/ToDo and I've picked something at random to ask a question about and see if we can get it done! "Add page for Hosting control panels - we seem to get a lot of people asking about them" I spotted this quote - What exactly does this mean? Does it mean that people want instructions on how to install some sort of web based admin panel? Or that they want one to be part of the distro as standard? RHEL doesn't have one (AFAIK) - so, I'm a bit lost as to what this means. Either way, our TODO page is too long, and I'm determined to blank it out. My aim, is to get some traction on this, so we can remove it from the ToDo page. So, I guess we can start with a clear definition of the requirement, and then move on from there. Discuss :)

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virDomainSetMaxMemory error
by Russell Jones 10 Apr '11

10 Apr '11

CentOS 5.6, x86_64 In Virt-Manager, when attempting to either change a guest's memory allocation or even just clicking "Apply" on the memory tab and not actually changing the values, the following error pops up: "Error changing memory values: this function is not supported by the connection driver: virDomainSetMaxMemory" When Googling around, I am finding reports of this error as early as two days ago, and as late as a year ago. Is there an option in KVM/Virt-Manager I am missing in order to resolve this problem, or is this bug really over a year old and not fixed in CentOS 5.6?

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CentOS-5.5 Live CD & netinstall
by Timothy Murphy 09 Apr '11

09 Apr '11

According to <http://wiki.centos.org/Manuals/ReleaseNotes/CentOSLiveCD5.5> "There is a "Network Install" option on the Live CD that is the same as our CentOS-5.5-i386-netinstall ISO". I've looked quite carefully at my CentOS-5.5 Live CD (on a USB stick), and I don't see a Network Install option anywhere. Could some kind soul explain where it can be found, please. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

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CentOS-announce Digest, Vol 74, Issue 2
by centos-announce-request＠centos.org 09 Apr '11

09 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-2011:0428 Important CentOS 4 i386 dhcp - security update (Tru Huynh) 2. CESA-2011:0428 Important CentOS 4 x86_64 dhcp - security update (Tru Huynh) 3. Release for CentOS-5.6 i386 and x86_64 (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Fri, 8 Apr 2011 23:18:26 +0200 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2011:0428 Important CentOS 4 i386 dhcp - security update To: centos-announce(a)centos.org Message-ID: <20110408211826.GA24978(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2011:0428 dhcp security update for CentOS 4 i386: https://rhn.redhat.com/errata/RHSA-2011-0428.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/dhclient-3.0.1-67.el4.i386.rpm updates/i386/RPMS/dhcp-3.0.1-67.el4.i386.rpm updates/i386/RPMS/dhcp-devel-3.0.1-67.el4.i386.rpm source: updates/SRPMS/dhcp-3.0.1-67.el4.src.rpm You may update your CentOS-4 i386 installations by running the command: yum update dhcp 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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New CentOS ToDo Page Required
by Mister IT Guru 09 Apr '11

09 Apr '11

Due to recent list traffic, it seems that we need to have a new todo list! I propose the following 1) Nuke current todo page 2) Create new todo page 3) Clear out ancient todo items a) Get rid of the items that are no longer relevant b) Reword those that are 4) Update Wiki a) Gasp as the magnitude at the job b) Inject coffee, add ego - write mini todo and propose to list c) Expand on b) till the list stops quibbling d) Find volunteers, and get cracking on Updating the wiki Any ideas? Anyone want to comment?

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how is "binary compatibility" determined?
by Keith Keller 09 Apr '11

09 Apr '11

Hi all! We've seen quite a few references on the list to "100% binary compatibility with upstream". What I am curious about is, how precisely is this determined? All the ways I can think of for comparing how two systems might work seem flawed in some way (e.g., using some sort of checksum; unit testing; verifying build parameters). I did some searches both at centos.org and google, but couldn't find anything specific about the test(s) used to determine compatibility. I have no particular reason for asking, other than wanting to be able to explain it to others if someone asks me. --keith -- kkeller(a)wombat.san-francisco.ca.us

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CentOS 5.6 updated packages - what about subversion?
by Greg Bailey 08 Apr '11

08 Apr '11

I see the following in the CentOS 5.6 Release Notes: 6.3. Packages that have been upgraded in 5.6 since the 5.5 release * python-2.4.3-27.el5_5.3 Wouldn't subversion also be listed? CentOS 5.5 has subversion-1.4.2-4.el5_3.1 CentOS 5.6 has subversion-1.6.11-7.el5 Is this list generated automatically or is it maintained by hand? -Greg

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Re: [CentOS] [CentOS-announce] Release for CentOS-5.6 i386 and x86_64
by aly.khimji＠gmail.com 08 Apr '11

08 Apr '11

Amazing!! Great work!! Thank you Aly Sent from my BlackBerry device on the Rogers Wireless Network

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Many thanks and a little hint concerning httpd on 5.6
by Olaf Mueller 08 Apr '11

08 Apr '11

Hello CentOS developer team, thank you very much for the release of CentOS 5.6. I have upgraded my server, notebook, netbook and workstation from 5.5 to 5.6 and everything works really fine so far, CentOS 5.6 seems to be rock solid. The only little problem happens on the upgrade of my server, since my web server doesn't start after reboot. But this was easy to fix since this error was known from the RHEL 5.6 upgrade. https://bugzilla.redhat.com/show_bug.cgi?id=669963 I am grateful for the CentOS Project. I like it's stability and long-term support. regards Olaf

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large memory usage by perl .so modules?
by E R 08 Apr '11

08 Apr '11

Under Centos 5.5 on an x86_64 box I am seeing large memory usage associated with perl .so modules. Example: this script: #!/usr/bin/perl use Time::HiRes; open(SMAPS, "/proc/$$/smaps"); while (<SMAPS>) { if (m/^\d/) { chomp($lib = (split(' ', $_))[5]); } elsif (m/^Size:\s*(\d+.*)/) { my $size = $1; print "$size $lib\n" if ($lib =~ m/HiRes/); } } produces this output: 24 kB /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/auto/Time/HiRes/HiRes.so 2044 kB /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/auto/Time/HiRes/HiRes.so 4 kB /usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi/auto/Time/HiRes/HiRes.so What is this 2044 kB entry? On a 32-bit Centos 5.4 box the same script emits: 20 kB /usr/lib/perl5/5.8.8/i386-linux-thread-multi/auto/Time/HiRes/HiRes.so 4 kB /usr/lib/perl5/5.8.8/i386-linux-thread-multi/auto/Time/HiRes/HiRes.so The 2044 kB entry seems to be counted towards memory usage as reported by ps. Thanks!

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Re: [CentOS] CentOS-5.5 Live CD & netinstall
by m.roth＠5-cent.us 08 Apr '11

08 Apr '11

William Hooper wrote: > On Fri, Apr 8, 2011 at 2:31 PM, Timothy Murphy <gayleard(a)eircom.net> wrote: >> Phil Schaffner wrote: <snip> > The issues you saw with grub being installed on the USB stick instead of the HDD are a bigger concern in my book. I wonder if you you have better luck installing GRUB on the HDD MBR, booting from the HDD and using grub to load the kernel and initrd off the USB stick. What you have to do is tell it no bootloader, then before you reboot at the end of the install, use <f-2> or whatever to get to another screen, then... lessee, I forget if it's mounted the install as /mnt/sysimage or not, but mount your /boot on the h/d, chroot, edit /boot/grub/device map so it shows HD 0,0, and then grub-install /dev/sdb (or whatever). Then when you reboot, you should be ok; if not, linux rescue, and do all that. mark, who wishes upstream would *offer* the option of other than /dev/sda or track 1 of this drive....

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/etc/hosts not resolving hostnames
by Johan Martinez 08 Apr '11

08 Apr '11

I have modified /etc/hosts file with IP address and hostname entries. However, host command is returning 'Host vhost1.example.com not found: 3(NXDOMAIN)'. Also, apache is returning error on start as '[error] (EAI 2)Name or service not known: Could not resolve host name vhost1.example.com-- ignoring!' . The ssh worked fine and resolved the hostname correctly (ssh from same system to itself - just for test). Am I missing something here? I thought /etc/hosts will be referred for all lookups. Any help?? jM.

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Exception error with 5.5 installation
by Kaplan, Andrew H. 08 Apr '11

08 Apr '11

Hi there -- I am trying to install the 64-bit version onto one of our servers. When I get to the point of loading various software packages, I normally select KDE desktop, and also make sure that CentOS extras is also selected. Once that is done, I click on Next to have the installation continue. Every attempt that I have made has resulted in an exception error occurring with the python packages. As a result, the installation fails. I have not been able to install CentOS since this problem started occurring. Does anyone know of a way I can get around this problem? Thanks. The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.

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iptables package issue
by Joseph L. Casale 08 Apr '11

08 Apr '11

I just did a test install off a netinstall iso to a mirror repo which left no /etc/sysconfig/iptables file in place. So a quick check: # yum whatprovides /etc/sysconfig/iptables --disablerepo=\* --enablerepo=base --enablerepo=updates --disableplugin=\* No Matches found Without that file iptables doesn't start as per the init script. Anyone know what may be awry? Thanks, jlc

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CentOS-announce Digest, Vol 74, Issue 1
by centos-announce-request＠centos.org 08 Apr '11

08 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 (Tru Huynh) 2. CESA-2011:0422 Moderate CentOS 4 x86_64 postfix - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Fri, 8 Apr 2011 14:13:18 +0200 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2011:0422 Moderate CentOS 4 i386 postfix - security update To: centos-announce(a)centos.org Message-ID: <20110408121318.GA31417(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2011:0422 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: updates/i386/RPMS/postfix-2.2.10-1.4.el4.i386.rpm updates/i386/RPMS/postfix-pflogsumm-2.2.10-1.4.el4.i386.rpm source: updates/SRPMS/postfix-2.2.10-1.4.el4.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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STOP THIS THREAD NOW!
by Kai Schaetzl 08 Apr '11

08 Apr '11

Folks, it has been asked a few times: PLEASE STOP THE "6 UPDATE" THREAD now! Developers: please just stop responding to that thread. It's not necessary to defend yourselves over a certain point (that has long been reached). Non-devs: if you think you can make a valuable contribution to centos infrastructure/development, please move over to centos-devel and make your serious offer *kindly* there. Any one else: JUST STOP, thanks! I'm really tired of this. Ralph: please unsubscribe everyone who can't shut his mouth. Thanks. A lot of of less-vocal people will thank you. Kai

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Can anyone suggest a SCSI 3 card in either PCI-X or PCI-E x 4 for a Dell Poweredge 2900?
by Kevin Thorpe 08 Apr '11

08 Apr '11

The only PCI-X card I have is an old ICP Vortex RAID controller and the Dell hangs with that installed (BIOS is disabled). It's only for a tape drive so performance isn't really an issue. thanks

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Controlling the order of /dev/sdX devices?
by Cal Sawyer 08 Apr '11

08 Apr '11

Hi CentOS 5.4(final) 2.6.18-164el5PAE. I am trying to prevent removable USB and eSATA devices from occupying /dev/sdX devices ahead of a 3ware RAID controller. For example: at boot, if a USB drive and eSATA HDD (connected to an LSI 1068E onboard controller, reflashed in "IT" mode to handle hotplug devices) were both present, they would occupy devices /dev/sdb and /dev/sdc, ahead of the RAID controller which ends up as /dev/sdd. As these are removable devices, they should normally get handled by custom udev script looking for adds matching KERNEL=="sd[c-z][0-9]" ,SUBSYSTEM=="block", so the volume handled by RAID controller gets grabbed by udev but fails to mount and subsequent udev plug events fails due the slots left empty below /dev/sdd. If no hotplug devices are present while booting, fstab handles mounting of the system and RAID volume: SATA system HDD /dev/VolGroup00/LogVol00 / RAID array LABEL=STORE /store ## mounts == /dev/sdb1 I realise this description is kind of a tangle, but i am essentially looking for a way to hard-map the 3ware RAID controller to /dev/sdb (UUID won't work as there are multiples of this system) before PCI (?) enumeration picks up the USB and LSI-managed devices so that udev can take care of the device at /dev/sdc and above. I've tried blacklisting the mpt and usb-storage modules and short-circuiting SUBSYSTEM=="block" devices in 05-udev-early.rules, all with zero or negative effect. rc.sysinit doesn't appear to be the right place and that's about as deep down as i know how to go. cheers, cs

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Kernel Panic on HP/Compaq ProLiant G7
by Windsor Dave L. (AdP/TEF7.1) 07 Apr '11

07 Apr '11

Hello Everyone, I recently installed CentOS 5.5 x86_64 on a brand new ProLiant DL380 G7. I have identical OS software running reock-solid on two other DL380 ProLiant servers, but they are G6 models, not G7. On the G7, the installation went perfectly and the machine ran great for about 2 weeks, when it just seemed to "stop". The system stopped responding on the network, and there was no video on the console (or remote console via iLO). It would not reboot or cold boot through iLO, I actually had to hold the power to turn it off and then hit it again to power up. This happened several times within a few days of each other. Each time, there was no evidence in any logs of a problem - the system just seemed to stop or lock up. We did have a CPU problem light appear on the front, so HP came in and replaced the one 4-core CPU. Since then, it has run as long as two weeks, but still crashes randomly. After the last reboot, I left the console in text mode on vt1, and when it crashed again this morning this was displayed on the screen: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8100dc435cf0 CR3: 000000008a6ca000 CR4: 00000000000006e0 Process smbd (pid: 18970, threadinfo ffff81001529e000, task ffff81011f5347a0) Stack: ffff81011e4e71c0 0000000000000000 ffff8100cf12a015 ffffffff80009c41 ffff81011e4e71c0 0000000100000000 000000030027ea9d ffff8100cf12a011 ffff81011e4e71c0 ffff81010d9cf300 ffff81011e4e71c0 ffff8101044099c0 Call Trace: [<ffffffff80009c41>] __link_path_walk+0x3a6/0xf5b [<ffffffff8000ea4b>] link_path_walk+0x42/0xb2 [<ffffffff8000cd72>] do_path_lookup+0x275/0x2f1 [<ffffffff80012851>] getname+0x15b/0x1c2 [<ffffffff800239d1>] __user_walk_fd+0x37/0x4c [<ffffffff80028905>] vfs_stat_fd+0x1b/0x4a [<ffffffff80039fa2>] fcntl_setlk+0x243/0x273 [<ffffffff80023703>] sys_newstat+0x19/0x31 [<ffffffff8005d229>] tracesys+0x71/0xe0 [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Code: 00 00 00 00 00 00 00 00 70 4d 4f 9d 00 81 ff ff 98 e4 4b dc RIP [<ffff8100dc435cf0>] RSP <ffff81001529fd18> CR2: ffff8100dc435cf0 <0>Kernel panic - not syncing: Fatal exception This suggests that something happened in a Samba process. I have the Samba3x packages installed since we are beginning to introduce Win7 clients into our environment. Googling "Kernel panic - not syncing: Fatal exception" and "CentOS" produced many hits, but nothing that seemed to exactly match my problem. Since this is the only G7 server I have here right now, I can't reproduce the problem on another machine. The G6s I have running the identical version of CentOS have no problems. I am trying to determine if this is pointing to a hardware or software issue. Some of the Google results suggested using a Centosplus kernel - is this a good idea? The server is a HP DL380 G7 Server with 4 GB RAM (1 DIMM 1333 MHz), one 4-core CPU (2133 MHz), 4 built-in Broadcom "NetExtreme II BCM5709 II Gigabit Ethernet" NICs, and a P410 Smart Array Controller. The P410 and the system BIOS have both been updated to the latest levels to see if that fixes the crashes, with no change. Any idea where I should look next? Thanks for any help anyone can provide! Best Regards, Dave Windsor Robert Bosch LLC Team Leader, MES Database Infrastructure Group (AdP/TEF7.1) 4421 Highway 81 North Anderson, SC 29621 USA www.bosch.us Tel: 1 (864) 260-8459 Fax: 1 (864) 260-8422 Dave.Windsor(a)us.bosch.com

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Centos 6 Update?
by David Brian Chait 07 Apr '11

07 Apr '11

All, As much as I hate to ask, how is this project coming along? We are approaching the 4 month post-release point... -David

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centos 5.6 live cd - not installable to " hard drive?"
by Johan Scheepers 07 Apr '11

07 Apr '11

Good day, Downloaded centos 5.6 live cd from... http://mirror.nexcess.net/CentOS/5.6/isos/x86_64/CentOS-5.6-x86_64-LiveCD.i… it is dated 06-04-2011. No option to install on hard disk. Have I missed it somehow? Please some advice. Maybe the address if an installable cd iso please. Thanks Johan

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Re: [CentOS] Centos 6 Update?
by Les Mikesell 07 Apr '11

07 Apr '11

On 4/7/2011 8:47 AM, Sorin Srbu wrote: >> -----Original Message----- >> From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf >> Of David Sommerseth >> Sent: Thursday, April 07, 2011 3:42 PM >> To: centos(a)centos.org >> Subject: Re: [CentOS] Centos 6 Update? >> >> Which is why I'm investigating a migration to Scientific Linux. > > [Lurking on the sideline and watching the argument(s)]: > > Funny how these discussions come up just in time for each new release... They come up every time that the methodology and resources of the developers don't produce the results expected by the users. The fact that this has historically only happened around release times is coincidental. People are (correctly) fearful of putting blind faith in optimistic engineers who say everything will be fine without saying why they believe that or why they reject suggestions for changes that might be improvements. While SL and other distributions are perfectly fine for almost all uses, there's a certain irony in the fact the single advantage of CentOS is the ease of converting from it to a paid/supported RHEL installation, and the RH changes that make the rebuild difficult are driving people away. -- Les Mikesell lesmikesell(a)gmail.com

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Re: [CentOS] Centos 6 Update?
by Hendrik 07 Apr '11

07 Apr '11

2011/4/6 Karanbir Singh <mail-lists(a)karan.org>: > On 04/06/2011 09:53 PM, Dag Wieers wrote: >>> That's not hard to do - stop reading them then. >> >> And once again we are avoiding a proper solution. >> > > No, once again you dont understand the issues, the problem or the > efforts going into the solution. > > Really, try stopping reading for a few weeks. You might surprise yourself. Do you notice nothing? Or is that the Indian mentality? -- Hendrik

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why are warning be treated as errors?
by Steve Clark 07 Apr '11

07 Apr '11

Hello, I am trying to compile RHEL-6 kernel srpm on Fedora 14 and run into the following problem. From what I read -Werror flag causes warnings to be treated as errors - but I don't see that flag on in the following. Any ideas? gcc -Wp,-MD,arch/x86/kernel/acpi/realmode/.wakemain.o.d -nostdinc -isystem /usr/lib/gcc/i686-redhat-linux/4.5.1/include -nostdinc -isystem /usr/lib/gcc/i686-redhat-linux/4.5.1/include -Iinclude -I/home/sclark/rpmbuild/BUILD/kernel-2.6.32/arch/x86/include -include include/linux/autoconf.h -D__KERNEL__ -Iinclude -I/home/sclark/rpmbuild/BUILD/kernel-2.6.32/arch/x86/include -include include/linux/autoconf.h -g -Os -D_SETUP -D_WAKEUP -D__KERNEL__ -I/home/sclark/rpmbuild/BUILD/kernel-2.6.32/arch/x86/kernel/acpi/realmode/../../../boot -Wall -Wstrict-prototypes -march=i386 -mregparm=3 -include /home/sclark/rpmbuild/BUILD/kernel-2.6.32/arch/x86/kernel/acpi/realmode/../../../boot/code16gcc.h -fno-strict-aliasing -fomit-frame-pointer -ffreestanding -fno-toplevel-reorder -fno-stack-protector -mpreferred-stack-boundary=2 -m32 -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(wakemain)" -D"KBUILD_MODNAME=KBUILD_STR(wakemain)" -D"DEBUG_HASH=57" -D"DEBUG_HASH2=38" -c -o arch/x86/kernel/acpi/realmode/.tmp_wakemain.o arch/x86/kernel/acpi/realmode/wakemain.c cc1: warnings being treated as errors arch/x86/kernel/apic/apic.c: In function 'lapic_suspend': arch/x86/kernel/apic/apic.c:2008:3: error: statement with no effect arch/x86/kernel/apic/apic.c: In function 'lapic_resume': arch/x86/kernel/apic/apic.c:2085:3: error: statement with no effect make[5]: *** [arch/x86/kernel/apic/apic.o] Error 1 make[4]: *** [arch/x86/kernel/apic] Error 2 Thanks, -- Stephen Clark *NetWolves* Sr. Software Engineer III Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark(a)netwolves.com http://www.netwolves.com

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Re: [CentOS] Centos 6 Update?
by Brian Mathis 07 Apr '11

07 Apr '11

On Thu, Apr 7, 2011 at 9:47 AM, Sorin Srbu <sorin.srbu(a)orgfarm.uu.se> wrote: >>-----Original Message----- >>From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf >>Of David Sommerseth >>Sent: Thursday, April 07, 2011 3:42 PM >>To: centos(a)centos.org >>Subject: Re: [CentOS] Centos 6 Update? >> >>Which is why I'm investigating a migration to Scientific Linux. > > [Lurking on the sideline and watching the argument(s)]: > > Funny how these discussions come up just in time for each new release... > -- > /Sorin Yes, stating the obvious. When there's nothing new the project should be focusing on improving things to become stronger to withstand the storm of the next release cycle. It only becomes obvious that has not been done at times like this when the storm has arrived. // Brian Mathis

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Re: [CentOS] ZFS @ centOS
by Chuck Munro 07 Apr '11

07 Apr '11

On 04/05/2011 09:00 AM, rainer(a)ultra-secure.de wrote: > > That is really a no-brainer. > In the time it takes to re-build such a "RAID", another disk might just > fail and the "R in "RAID" goes down the toilet. Your 19-disk RAID5 just > got turned into 25kg of scrap-metal. > > As for ZFS - we're using it with FreeBSD with mixed results. > The truth is, you've got to follow the development very closely and work > with the developers (via mailinglists), potentially testing > patches/backports from current - or tracking current from the start. > It works much better with Solaris. > Frankly, I don't know why people want to do this ZFS on Linux thing. > It works perfectly well with Solaris, which runs most stuff that runs on > Linux just as well. > I wouldn't try to run Linux-binaries on Solaris with lxrun, either. > During my current work building a RAID-6 VM Host system (currently testing with SL-6 but later CentOS-6) I had a question rolling around in the back of my mind whether or not I should consider building the Host with OpenSolaris (or the OpenIndiana fork) and ZFS RAID-Z2, which I had heard performs somewhat better on Solaris. I'd then run CentOS Guest OS instances with VirtualBox. But ... I've been reading about some of the issues with ZFS performance and have discovered that it needs a *lot* of RAM to support decent caching ... the recommendation is for a GByte of RAM per TByte of storage just for the metadata, which can add up. Maybe cache memory starvation is one reason why so many disappointing test results are showing up. Chuck

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Mirrors
by Kai Schaetzl 07 Apr '11

07 Apr '11

I noticed that I didn't get any of the 5.6 updates rsynced yet, so I checked my mirror and then the mirrors list. This mirror is indeed not on the list anymore and also not on the status page. However, I see other mirrors still on the list that are lagging for days. And I see that this mirror has a full 5.6 directory (maybe not complete, though, but quite full). I don't see any removal announcement about it on centos-mirror either. So, I'm wondering if this mirror is now a mirror or not or if it has just fallen off the list somehow? Talking of: ftp://rsync.hrz.tu-chemnitz.de/pub/linux/centos/ I also notice that /5 is a directory and not a symlink as 4 and 3 are. But this is the same on mirror.centos.org. Why isn't it a symlink? Kai

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Re: [CentOS] why are warning be treated as errors?
by Steve Clark 07 Apr '11

07 Apr '11

On 04/07/2011 09:13 AM, Rudi Ahlers wrote: > On Thu, Apr 7, 2011 at 3:10 PM, Steve Clark<sclark(a)netwolves.com> wrote: >> Hello, >> >> I am trying to compile RHEL-6 kernel srpm on Fedora 14 and run into the >> following problem. From what I read >> -Werror flag causes warnings to be treated as errors - but I don't see that >> flag on in the following. Any ideas? >> >> gcc -Wp,-MD,arch/x86/kernel/acpi/realmode/.wakemain.o.d -nostdinc >> -isystem /usr/lib/gcc/i686-redhat-linux/4.5.1/include -nostdinc -isystem >> /usr/lib/gcc/i686-redhat-linux/4.5.1/include -Iinclude >> -I/home/sclark/rpmbuild/BUILD/kernel-2.6.32/arch/x86/include -include >> include/linux/autoconf.h -D__KERNEL__ -Iinclude >> -I/home/sclark/rpmbuild/BUILD/kernel-2.6.32/arch/x86/include -include >> include/linux/autoconf.h -g -Os -D_SETUP -D_WAKEUP -D__KERNEL__ >> -I/home/sclark/rpmbuild/BUILD/kernel-2.6.32/arch/x86/kernel/acpi/realmode/../../../boot >> -Wall -Wstrict-prototypes -march=i386 -mregparm=3 -include >> /home/sclark/rpmbuild/BUILD/kernel-2.6.32/arch/x86/kernel/acpi/realmode/../../../boot/code16gcc.h >> -fno-strict-aliasing -fomit-frame-pointer -ffreestanding >> -fno-toplevel-reorder -fno-stack-protector -mpreferred-stack-boundary=2 >> -m32 -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(wakemain)" >> -D"KBUILD_MODNAME=KBUILD_STR(wakemain)" -D"DEBUG_HASH=57" -D"DEBUG_HASH2=38" >> -c -o arch/x86/kernel/acpi/realmode/.tmp_wakemain.o >> arch/x86/kernel/acpi/realmode/wakemain.c >> cc1: warnings being treated as errors >> arch/x86/kernel/apic/apic.c: In function 'lapic_suspend': >> arch/x86/kernel/apic/apic.c:2008:3: error: statement with no effect >> arch/x86/kernel/apic/apic.c: In function 'lapic_resume': >> arch/x86/kernel/apic/apic.c:2085:3: error: statement with no effect >> make[5]: *** [arch/x86/kernel/apic/apic.o] Error 1 >> make[4]: *** [arch/x86/kernel/apic] Error 2 >> >> Have you checked on the Fedora forums, or mailing list? >> >> I googled for it. I thought that since RHEL-6 is going to soon be Centos 6 that someone on this list might know the answer. I am only using RHEL-6 til Centos 6 is released and will have to recompile the srpm for the kernel then so I thought I would get a head start. -- Stephen Clark *NetWolves* Sr. Software Engineer III Phone: 813-579-3200 Fax: 813-882-0209 Email: steve.clark(a)netwolves.com http://www.netwolves.com

1 0

Re: [CentOS] KVM Host Disk Performance
by Chuck Munro 07 Apr '11

07 Apr '11

On 04/04/2011 09:00 AM, compdoc wrote: > > It's possible to set up guests to use a block device that will get you the > same disk I/O as the underlying storage. > > Is that what you're seeing? What speed does the host see when benchmarking > the RAID volumes, and what speeds do the guests see? > > Yes, I have been going on the assumption that I get close to native block device performance, but the test results tell me otherwise. I see array rebuild data rates which seem reasonable ... in the order of 60 to 80 MBytes/sec. I'm using 256k chunks, with the stride size set to match the number of data drives. Using bonnie++, I mounted one of the Guest RAID-6 filesystems on the Host, ran the default tests, unmounted, then booted the Guest and ran the same default tests. The amount of RAM assigned was the same for both, to level the playing field a bit. Direct comparisons between the two were difficult to judge, but the general result was that the Host was between 2:1 and 3:1 better than the Guest, which seems to be a rather large performance gap. Latency differences were all over the map, which I find puzzling. The Host is 64-bit and the Guest 32-bit, if that makes any difference. Perhaps caching between Host and Guest accounts for some of the differences. At the moment my questions tend to be a bit academic. I'm primarily wondering if RAID-10 is paranoid enough given the current quality of WD CaviarBlack drives (better than dirt-cheap consumer drives, but not enterprise grade). My second question relates to whether or not the added overhead of using something like qcow2 would be offset by the advantages of more space efficiency and the copy-on-write feature. I'd love to hear what other software RAID users think, especially regarding large-capacity drives. It's rare for a modern drive to hand out bad data without an accompanying error condition (which the md driver should handle), but I have read that uncaught bad data is possible and would not be flagged in RAID arrays which don't use parity calculations. Chuck

7 8

Auto-updates -- Bad Idea?
by email builder 07 Apr '11

07 Apr '11

Hello, As I've learned recently, I do not have any auto updates configured on my system. I see some posts on the web encouraging the use of "yum-cron", but I'd like to know what people feel about the use of automatic updates. That is, for a server (non-desktop) system, automatic updates could break things or have other unforeseen consequences, and that could happen at the worst of times, since the process runs regularly. On the other hand, for small businesses without highly trained sysadmins or ones with enough time to baby their servers, missing critical updates to, say openssl or some other mission-critical package could spell disaster. Is the only reasonable solution to schedule a "human cron" once a week to look at needed updates? Ouch. Thanks in advance for your considered opinions.

6 8

How to set the hostname alias in DNS server
by sync 07 Apr '11

07 Apr '11

Hi ,all: There has a problem which confused me for a long time . The problem is the following: Would I can set the hostname alias in DNS server? That's to say, for example , if my hostname is called server, that it's ip address is 127.0.0.1 and I want to alias another name called aaa Gernerally, I can edit the /etc/hosts file to modify it, but the another computer did not recognise it. How could I do it ? Thanks in advanced ....

3 4

Printers, aka an old time sysadmin
by m.roth＠5-cent.us 07 Apr '11

07 Apr '11

Well, today, I feel like a real, old time sysadmin. Now, I didn't have to write a driver in assembly for the printer, but.... We got this huge, 44" HP Designjet z3200ps printer. Only supports Win and Mac. Fine, I hang it off of one of our servers on a subnet (at $0.96/foot paper, we're the only ones who print on it....). Then I'm thinking that all I really need is a .ppd. My co-worker, who's also got a Mac, d/l's the Mac driver and extracts the .ppd. The Windoze one is apparently buried in a dll, you see.... I then figured out how to hack a .ppd. First, I found an ifdef construction, for Mac-only information. That worked on the small paper (24" width roll, "small"). Then the real paper, the 42" stuff. Why HP sells a 44" printer, but 42" paper, dunno, but.... there's no option for large format printing. After a pointless waste of half an hour on HP's "live chat" (not sure how many chats the guy was on), he tells me there's no driver. I call HP support, and talk to someone who seems to know a little more... but is sorta fuzzy on .ppd's, and then tells me that there ought to be an option to set a custom size, and seems to confirm what I read (in vi) in the ppd, that there are no settings for 42" paper. So I hacked it, and added settings for 42"x34", and 42"x60" (the usual size for posters). A lot was cut, paste, and substitute, but the one gotcha is that the actual paper size that the printer sees is in points. Once I got that, it worked beautifully. Anyone needs any info about hacking a .ppd, feel free to email me; if you have a beast of a z3200ps, I'll be glad to send you a copy of mine. mark

4 4

Re: [CentOS] Centos 6 Update?
by Ian Murray 06 Apr '11

06 Apr '11

> > firstly, get a better email client. Your existing one is broken. Irrelevant, unhelpful and quite rude. Aside from that, if you tell me what you perceive to be the problem, perhaps stand a chance to fix the issue. If it is genuinely a client issue, then please give me something to send back to Yahoo. Assuming it wasn't just a very cheap and childish shot, of course. Obviously it wasn't so broken that you weren't able to read or reply my mail. I can't imagine what terrible hardship it has caused you. > > On 04/06/2011 12:55 PM, Ian Murray wrote: > >> Its easy to fixate on the idea of CentOS being the distro and the > distro > >> alone - however, a very large part of what the users see value in is > the > >> user base around CentOS - and focused, specialised help with those > areas > >> would go a long way in 'helping' CentOS. > > > > Would this help get a future release out of the door quicker? > > > > Sure. Okay, Thanks for clarifying that because it is the releases that appear be the problem at hand and the direct connections don't automatically leap out at me.

6 9

FTP server for registered and anonymous users
by Fidel Dominguez-Valero 06 Apr '11

06 Apr '11

Friends I have a good ftp server working with authentication of users, but I want to put a folder with general information for everyone can read without having to log in, that is to be seen both registered users and guests too. -- Fidel Dominguez-Valero Linux User: 433411 Website: http://www.valerofix.ryanhost.net

7 10

File-system Corruption
by James Bensley 06 Apr '11

06 Apr '11

Hi List, I suppose this isn't strictly CentOS but I'm talking about some 5.5 servers so I thought someone else here may have had the same issues; We power on servers at night via IPMI and shut them down the same way for automation. The problem I'm facing is that the servers are shutdown in about 2 seconds. IPMI provides remote access to the power features as we know so I don't think the OS has a chance to do a 'graceful' shutdown. One server in particular is told to shutdown at say 07:00am, the last scheduled task on there should finish around 06:30 so there is a half hour window for over run. It now has a corrupt XFS file system which I am repairing as we speak. I am wondering if this could be a possible cause of these problems? Perhaps if that last tasks over runs a couple of times and it gets powered off in the middle of the tasks? (These are backup servers rsyncing from other servers) Does anyone here have problems with this? -- James. http://www.jamesbensley.co.cc/ There are 10 kinds of people in the world; Those who understand Vigesimal, and J others...?

3 2

CentOS 5.6 will not install due to Firefox error
by Gilbert Sebenste 06 Apr '11

06 Apr '11

Hello all, Well, my local mirror now has CentOS 5.6! Yay! But, I cannot get it to install. A "yum update" and a "yum --skip-broken" yields me this: --> Processing Conflict: firefox conflicts xulrunner >= 1.9.2.14 --> Finished Dependency Resolution firefox-3.6.13-2.el5.centos.i386 from installed has depsolving problems --> firefox conflicts with xulrunner Skip-broken could not solve problems Error: firefox conflicts with xulrunner You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest The program package-cleanup is found in the yum-utils package. Any ideas? All the packages seem to be there. ******************************************************************************* Gilbert Sebenste ******** (My opinions only!) ****** *******************************************************************************

9 13

ZFS @ centOS
by Dawid Horacio Golebiewski 06 Apr '11

06 Apr '11

I have trouble finding definitive information about this. I am considering the use of SME 7.5.1 (centOS based) for my server needs, but I do want to use ZFS and I thus far I have only found information about the ZFS-Fuse implementation and unclear hints that there is another way. Phoronix reported that http://kqinfotech.com/ would release some form of ZFS for the kernel but I have found nothing. Can so. tell me if fuse-ZFS is more trouble than it's worth? Thanks in adv. Dawide

14 24

Understanding yum automatic upgrades
by email builder 06 Apr '11

06 Apr '11

Hello, Sorry if this is somewhat naive, but I'm a little confused as to what the criteria is for that which will get upgraded automatically by yum and what will not. I see in our logwatch messages from time to time that yum upgraded a bunch of stuff, but I also notice that yum will not upgrade other packages at all (easy example is clamav, but there are others). Can someone explain or point me to where I can read about the distinction between what is and is not subjected to automatic upgrade? Thanks!

5 15

Re: [CentOS] [OT: threading] WAS: Centos 6 Update?
by Trutwin, Joshua 06 Apr '11

06 Apr '11

> > >> firstly, get a better email client. Your existing one is broken. > > > Irrelevant, unhelpful and quite rude. > > > > mailing lists are setup to retain thread sanity, its expected people > > use mailclients that can honour that. If yours cant and you prefer not > > to change it- perhaps consider using the centos.org forums instead ? > > FWIW, on kmail on Fedora 14, at least, his messages show up properly > threaded, even though the In-Reply-To and References headers are missing > from his message. Don't know why Thunderbird doesn't show them > threaded. > > Of course, kmail has its own problems, particularly with putting in to many > References headers on occasion, but that's a different issue..... Some clients also thread by subject by default, I usually use claws mail for ML stuff as it's threading is excellent. Says the guy sending this email in Outhouse.... Josh

3 2

OFFTOPIC :: IB hardware choice
by Adrian Sevcenco 06 Apr '11

06 Apr '11

Hi! I would need an advice from those that use IB (as admins :) ) i have a choice between : 1. Mellanox InfiniHost® III Lx HCA card, single-port CX4, DDR, PCIe x8, mem-free, tall bracket, RoHS R5 2. QLogic Single Port 20 Gb InfiniBand to x16 PCI Express Adapter (Single Pack) aside the price is there anything else that could help me make a discrimination between this two? (these will be used in twin servers for a small (up to 24 nodes) parallel cluster) Thanks! Adrian

3 2

Re: [CentOS] Centos 6 Update?
by Ian Murray 06 Apr '11

06 Apr '11

> Thats a very good question, and something more people should be asking > : here is a terse reply : adopt a part of the distro, contribute tests > and take ownership of driving support for those components forward ( so, > wiki content, support in irc channels and support for users on those > components in the mailing lists ). Start with a package or two, then > move that forward. Start with whats already in the distro. > > Its easy to fixate on the idea of CentOS being the distro and the distro > alone - however, a very large part of what the users see value in is the > user base around CentOS - and focused, specialised help with those areas > would go a long way in 'helping' CentOS. Would this help get a future release out of the door quicker?

2 1

Re: [CentOS] KILL THIS THREAD ( Centos 6 Update?)
by Ian Murray 06 Apr '11

06 Apr '11

----- Original Message ----- > From:Kai Schaetzl <maillists(a)conactive.com> > > > This thread or others like it will continue > > wrong. It will continue as long people bite. Stop biting the bait! > > Kai Oh, the irony.... Likewise. Somebody will still keep coming onto ask the questions, esp. non-regular list users.... hell, people do it now and the subject has been done to death over the last few months. I personally see little point in the threads either. As far as I can tell, you have to accept the situation as-is or switch distro. Dev model isn't going to change and previously said, anyway... maybe the rebuild model for non-hobbyist use has run its course.

1 0

sshd: Authentication Failures: 137 Time(s)
by Rainer Traut 06 Apr '11

06 Apr '11

Hi, to prevent scripted dictionary attacks to sshd I applied those iptables rules: -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -m recent --update --seconds 60 --hitcount 4 --name SSH --rsource -j DROP -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -m recent --set --name SSH --rsource And this is part of logwatch: sshd: Authentication Failures: unknown (www.telkom.co.ke) 137 Time(s) unknown (mkongwe.jambo.co.ke): 130 Time(s) unknown (212.49.70.24): 107 Time(s) root (195.191.250.101): 8 Time(s) How is it possible for an attacker to try to logon more then 4 times? Can the attacker do this with only one TCP/IP connection without establishing a new one? Or have the scripts been adapted to this? Thx Rainer

15 26

Forcing IPv4 DNS lookups first before IPv6
by Russell Jones 05 Apr '11

05 Apr '11

Hello! I am having a strange issue with CentOS 5.4 that I cannot seem to solve. Every DNS lookup results in AAAA records being requested first before A records. As a result, this causes a large amount of unnecessary DNS traffic on the network. IPv6 has been completely disabled on these servers: /etc/modprobe.conf, ipv6 off and net-pf-10 off /etc/sysconfig/network, NETWORKING_IPV6=no lsmod | grep ipv6 shows the kernel module no longer loaded. Yet watching TCP dump shows that AAAA records are requested before A records every time a login is requested from one of our local machines to another. Is there some sort of configuration directive I can use to force IPv4 lookups first before IPv6? Or even better, stop IPv6 lookups all together?

6 13

Re: [CentOS] KILL THIS THREAD ( Centos 6 Update?)
by Ian Murray 05 Apr '11

05 Apr '11

----- Original Message ----- > From:Kai Schaetzl <maillists(a)conactive.com> > To:centos@centos.org > Cc: > Sent:Tuesday, 5 April 2011, 13:21 > Subject:Re: [CentOS] KILL THIS THREAD ( Centos 6 Update?) > > +100 !!!! > > Kai Anybody that thinks this thread can be "killed" is so badly mis-understanding the situation. This thread or others like it will continue to pop-up in the short term until all releases are in-line with RH and then they will continually re-appear with subsequent releases. So 'killing' the thread is akin to burying ones head in the sand. I question whether a rebuild project is a sensible way forward for anything but hobbyist use. That isn't a criticism of the dev team (before anyone tries to twist it as such) but more a question about the viability of the model.

2 1

screen
by Agile Aspect 05 Apr '11

05 Apr '11

Hi - under CentOS 5, has anyone be able to get the vertically splitting under screen to work? I downloaded the latest screen-4.0.3 and the wrp_vertical_split_0.3_4.0.2.diff.bz2 patch for vertical splitting and I still can't get it work. ^A | doesn't do anything. Horizontal splitting works fine. -- Agile

2 2

OT Problem seeing slave drives.
by Jimmy Bradley 05 Apr '11

05 Apr '11

This isn't specifically about cent os, but I am running cent os on this machine. I've got a Dell Dimension 2400 desktop pc. I've tried on a number of occasions to put a second hard drive in the machine, but I can't get the machine to recognize the second drive in BIOS. I'm going to try and keep this short and sweet. I've tried all that I know to try. I've set the jumpers on the drives to master and slave, I've tried setting the jumpers to cable select. I've changed the IDE ribbon cable. As far as I know, I've done all the trouble shooting steps that you'd do when having this problem. The only conclusion I can come up with, is that it's the BIOS. The one thing I haven't done is flash the BIOS, and I'm reluctant to do that. One other thing that I did try, was on the secondary IDE, I tried connecting a second CD drive, and the BIOS would not see it either. The machine will only see the drives that are connected to what would be the Master drive connection on the ribbon cable. Anyone have any ideas? Thanks Jim

6 8

How to install wine ?
by Rajan Dahal 05 Apr '11

05 Apr '11

Hello friends, I have downloaded wine-1.3.13.tar.bz2 How to install it ? I have no internet connection. so I want to install it manually. Thanks in advance. Rajan

6 7

Re: [CentOS] CentOS Digest, Vol 75, Issue 5
by Chuck Munro 05 Apr '11

05 Apr '11

On 04/05/2011 09:00 AM, John R Pierce wrote: > > AFAIK, no standard raid modes verify parity on reads, as this would > require reading the whole slice for every random read. Only raid > systems like ZFS that use block checksuming can verify data on reads. > parity (or mirrors) are verified by doing 'scrubs' > > Further, even if a raid DID verify parity/mirroring on reads, this would > at best create a nonrecoverable error (bad data on one of the N drives > in the slice, no way of knowing which one is the bad one). > Thanks John, that's good information, something I didn't know. So I should think of RAID-5/6 parity as a mechanism for recovering from a drive fault that is more space-efficient than simple mirroring. Maybe RAID-10 with hot spares is more than "good enough" in most applications, but I do like dual parity for its ability to recover even in the face of a disk error popping up during the rebuild. Am I being too paranoid? Too bad ZFS on Linux is still up at the fuse layer. I understand Btrfs is rolled into newer kernels and should be in CentOS-6, but I read somewhere it's not yet in stable release and has some potential issues, so I'm reluctant to try it. It won't have RAID-6-like parity for a while. The fact that Oracle has both ZFS and Btrfs under its wing is, um, "interesting". I'm only asking for the world :-) Chuck

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