Discuss July 2012

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166 participants
155 discussions

AMD Opteron 1218 wrong CPU metrics in 6.3
by Vlad K. 12 Jul '12

12 Jul '12

Hello all, since upgrade to 6.3 (and kernel 2.6.32-279.x) it looks like only one core of the AMD Dualcore Opteron 1218 is functional. Reverting to previous kernel shows everything working as expected. I've filed a bug report here after failing to figure out if it is just a configuration problem: http://bugs.centos.org/view.php?id=5821 I can't find anything on the net that would explain where the problem is. /proc/cpuinfo shows two cores, but top and /proc/stat show basically one core working: - top shows cpu0 idle constantly at 0%, and sporadic 100%sy or 50%sy 50%us, which can't be right - /proc/stat shows cpu0 idle and iowat at 0 - Munin CPU graph shows 200% available but metrics go only up to 100% - mpstat -P ALL shows proper %idle for both cores, but still core0 gets either 100%sy or 50%sy 50%us sporadically. I've also got this in the logs, possibly due to BIOS, and I don't know if it is related, I've seen it with 6.2 too. Jul 11 20:44:57 app1 kernel: [Firmware Bug]: powernow-k8: No compatible ACPI _PSS objects found. Jul 11 20:44:57 app1 kernel: [Firmware Bug]: powernow-k8: Try again with latest BIOS. Any ideas what the possible cause could be or what can I do to figure this out? It's a rented server so I don't have the ability to toy with the BIOS. Thanks. -- .oO V Oo.

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Problem with RAID on 6.3
by Stephen Harris 12 Jul '12

12 Jul '12

I have 4 ST2000DL003-9VT166 (2Tbyte) disks in a RAID 5 array. Because of the size I built them as a GPT partitioned disk. They were originally built on a CentOS 5.x machine but more recently plugged into a CentOS 6.2 machine where they were detected just fine e.g. % parted /dev/sdj print Model: ATA ST2000DL003-9VT1 (scsi) Disk /dev/sdj: 2000GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 3 2097kB 2000GB 2000GB Linux RAID raid The MBR is empty except for the standard "protection" partition % fdisk -l /dev/sdj WARNING: GPT (GUID Partition Table) detected on '/dev/sdj'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdj: 2000.4 GB, 2000398934016 bytes 256 heads, 63 sectors/track, 242251 cylinders Units = cylinders of 16128 * 512 = 8257536 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdj1 1 242252 1953514583+ ee GPT % dd if=/dev/sdj count=1 2> /dev/null | hexdump 0000000 0000 0000 0000 0000 0000 0000 0000 0000 * 00001c0 0002 ffee ffff 0001 0000 88af e8e0 0000 00001d0 0000 0000 0000 0000 0000 0000 0000 0000 * 00001f0 0000 0000 0000 0000 0000 0000 0000 aa55 0000200 So far, so normal. This works fine under 2.6.32-220.23.1.el6.x86_64 Personalities : [raid1] [raid10] [raid6] [raid5] [raid4] md127 : active raid5 sdj3[2] sdi2[1] sdk4[3] sdh1[0] 5860537344 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] However, I just patched to CentOS 6.3 and on reboot this array failed to be built. The 2.6.32-279 kernel complained that /dev/sdj was too similar to /dev/sdj3. But I reboot to -220.23.1 then it works. And, indeed, if I run "mdadm --examine /dev/sdj" then it _does_ look like mdadm thinks the raw device is part of the array! But with a different name... % mdadm --examine /dev/sdj /dev/sdj: Magic : a92b4efc Version : 0.90.00 UUID : 79b0ccbb:8f11154b:7df88b83:4a0b6975 Creation Time : Thu Sep 8 22:14:01 2011 Raid Level : raid5 Used Dev Size : 1953512448 (1863.01 GiB 2000.40 GB) Array Size : 5860537344 (5589.04 GiB 6001.19 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 5 Update Time : Tue Jul 10 09:10:38 2012 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 Checksum : 8cc92232 - correct Events : 36410 Layout : left-symmetric Chunk Size : 64K Number Major Minor RaidDevice State this 2 8 147 2 active sync /dev/sdj3 0 0 8 113 0 active sync /dev/sdh1 1 1 8 130 1 active sync /dev/sdi2 2 2 8 147 2 active sync /dev/sdj3 3 3 8 164 3 active sync /dev/sdk4 This is the same output as if I'd run it against /dev/sdj3 What's odd is that I also have 4*1Tbyte disks in another raid array but these are partitioned with standard MBR partitions, and these are not reporting this problem. % dd if=/dev/sdd count=1 2> /dev/null | hexdump 0000000 0000 0000 0000 0000 0000 0000 0000 0000 * 00001b0 0000 0000 0000 0000 0000 0000 0000 0100 00001c0 0001 fefd ffff 003f 0000 5982 7470 0000 00001d0 0000 0000 0000 0000 0000 0000 0000 0000 * 00001f0 0000 0000 0000 0000 0000 0000 0000 aa55 0000200 % mdadm --examine /dev/sdd /dev/sdd: MBR Magic : aa55 Partition[0] : 1953520002 sectors at 63 (type fd) So, finally, the question: Is there anything I could do inside the MBR of these GPT disks to stop mdadm from thinking the whole disk is part of the array? Is there anything I can do that'll let the new kernel assemble the array? Thanks! -- rgds Stephen

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FYI, minor change in anaconda behaviour between 6.2 and 6.3
by Stephen Harris 11 Jul '12

11 Jul '12

If you use a kickstart file to build unattended servers (eg virt-install) then new disks or virtual volumes will cause problems unless you have "zerombr true" in the kickstart file eg zerombr yes clearpart --all --initlabel part /boot --fstype=ext4 --asprimary --size=100 part swap --asprimary --size=512 part / --fstype=ext4 --asprimary --grow --size=1 (CentOS 6.2 didn't need zerombr). Also FWIW, lines such as repo --name="CentOS" --baseurl=http://repo/CentOS/DVD/CentOS-6 repo --name="Updates" --baseurl=http://repo/CentOS/updates/centos6/x86_64 now work. In CentOS6.2 this would fail with dependency problems. Whether that's just 'cos the updates repo doesn't have conflicting packages so far and it'll break in the future, but it's working today :-) -- rgds Stephen

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question on initrd.img file from images/pxeboot
by Jerry Geis 11 Jul '12

11 Jul '12

What format is the images/pxeboot/initrd.img file on the DVD ? Its not gzip its not straight cpio What is it? I wish to change it. I'm finding information on changing the gzip version of initrd but not the PXE one. If I do "file initrd.img" it just says data. Thanks, Jerry

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So, just wondering, is OpenJDK7 in CentOS 6.3??
by Fernando Cassia 11 Jul '12

11 Jul '12

http://www.redhat.com/about/news/archive/2012/6/red-hat-enterprise-linux-63… "Developer Tools: In addition to OpenJDK6 support in Red Hat Enterprise Linux 6, the newly introduced OpenJDK7 allows customers running Red Hat Enterprise Linux 6.3 to develop and test with the latest version of open source Java. " Yet in the CentOS 6.3 release notes, the only mention about "OpenJDK" is for OpenJDK 6... http://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.3 "7.4. Packages released as 6.2 updates with older packages on the 6.3 install media apr-1.3.9-5.el6_2 apr-devel-1.3.9-5.el6_2 java-1.6.0-openjdk-src-1.6.0.0-1.48.1.11.3.el6_2 java-1.6.0-openjdk-demo-1.6.0.0-1.48.1.11.3.el6_2 java-1.6.0-openjdk-devel-1.6.0.0-1.48.1.11.3.el6_2 java-1.6.0-openjdk-javadoc-1.6.0.0-1.48.1.11.3.el6_2 java-1.6.0-openjdk-1.6.0.0-1.48.1.11.3.el6_2 " Is this because OpenJDK7 is not included, or because it is included but not worth mentioning in the rel notes?. (No intention to offend anyone, just thinking aloud). I am downloading CentOS 6.3 as I write this, so I'll soon find out... yet I wanted to ask anyhow (because perhaps the addition of OpenJDK7 -if present- could be added to the wiki?). Regards, FC -- During times of Universal Deceit, telling the truth becomes a revolutionary act - George Orwell

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Re: [CentOS] Best way to duplicate a live Centos 5 server?
by Cal Sawyer 11 Jul '12

11 Jul '12

Subject: Re: [CentOS] Best way to duplicate a live Centos 5 server? To: CentOS mailing list <centos(a)centos.org> On Mon, Jun 18, 2012 at 11:21 AM, Cal Sawyer <cal-s(a)blue-bolt.com> wrote: >> > >> > ReaR has suddenly become very interesting to me, probably explaining why >> > it utterly fails to work properly (for me).I'm using 1.13 to pull a >> > USB-based recovery image, but there's an error in the >> > backup/NETFS/default/50_make_backup.sh script that doesn't mount the USB >> > device after the mkrecovery step, so subsequent tar fails on write to >> > the non-existent mountpoint. I fixed that, but on recovery it fails to >> > mount the necessary directories on the restore drive as well, so "rear >> > recover" quickly bombs out. Is anyone having any success actually using >> > ReaR on CentOS 6.x? - csawyer > It intentionally doesn't deal with drives the kernel has marked as > removable. I had trouble with that with the main drives on a SAS > hotswap backplane in an earlier version but I think that is fixed now. > > I'd recommend asking how to override this on the ReaR mail list. > While the code seems usable (and yes, I have succeeded in using it on > Centos 6x.), the documentation either doesn't exist yet or is very out > of date. But, the authors are very responsive and it would be good > to let them know about any bugs or usability problems. The mail list > is still at sourceforge although the code has been moved to github and > there is talk of moving the list elsewhere. > > -- Les Mikesell lesmikesell(a)gmail.com ReaR hasn't posed any insurmountable problems with USB removable media but i can see SATA/SAS needing some massaging in the device detection dep't. Yes, i've gotten myself on the ReaR mailing list now. You're right - documentation is pretty dire. Guess i'm not alone in hating doing it. USB backup is broken due to the order in which path variables get set - sure is lot of fun trawling through the scripts to find out what gets set when. Hope the ReaR maintainers are interested in this and haven't gotten themselves mired in tape archive integration - i would have thought USB backup was the winner in terms of getting broad acceptance as a bare-metal DR solution. However, when it works - wow. Just restored an HP dl360 w/HWRAID to a Presario desktop machine and it lives! No network, but that's small beans compared to the larger win. - csawyer

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KVM upgrade to 6.3
by Chris 11 Jul '12

11 Jul '12

Hello, I upgraded my centos 6.2 machine (KVM virtualization host) to 6.3. Do I need to upgrade my virtual machine config files? Result: /etc/libvirt/qemu/*.xml <type arch='x86_64' machine='rhel6.2.0'>hvm</type> Expected result: <type arch='x86_64' machine='rhel6.3.0'>hvm</type> -- Chris

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[CentOS 6.3] rsyslog 5.8.10-2 - PreserveFQDN directive ignored
by SilverTip257 11 Jul '12

11 Jul '12

Hello, I recently upgraded a server from CentOS 6.2 to 6.3 I found a change in the behavior of rsyslog's configuration file that I found particularly interesting. The "$PreserveFQDN on" directive was not being recognized as the config remained unchanged during the upgrade. This incorrect behavior caused the host to syslog with only the host name and not it's fully qualified domain name. ** Has anyone else experienced this odd behavior? ** I did find a workaround [0] [1], but feel this behavior is a bug. Note the bugreport linked previously was for version 5.4.0 and reported in July 2010. If I make $PreserveFQDN the _first_ directive it syslogs with the FQDN otherwise the directive is ignored. The official 6.2 mirror has rsyslog-4.6.2-12.el6.i686.rpm and 6.3 has rsyslog-5.8.10-2.el6.i686.rpm For the record here's my output from `yum info rsyslog`: Name : rsyslog Arch : i686 Version : 5.8.10 Release : 2.el6 Size : 2.1 M Repo : installed >From repo : base Summary : Enhanced system logging and kernel message trapping daemons URL : http://www.rsyslog.com/ License : (GPLv3+ and ASL 2.0) Description : Rsyslog is an enhanced, multi-threaded syslog daemon. It supports MySQL, : syslog/TCP, RFC 3195, permitted sender lists, filtering on any message part, : and fine grain output format control. It is compatible with stock sysklogd : and can be used as a drop-in replacement. Rsyslog is simple to set up, with : advanced features suitable for enterprise-class, encryption-protected syslog : relay chains. I've not found other reports of this issue with CentOS 6.3 so far and there's no recent mention of this bug [yet] on the Rsyslog Bugzilla [2]. But the following ticket [3] submitted this past April makes me wonder. Config Snippet: <config> #rsyslog v3 config file $PreserveFQDN on # if you experience problems, check # http://www.rsyslog.com/troubleshoot for assistance #### MODULES #### $ModLoad imuxsock.so # provides support for local system logging (e.g. via logger command) $ModLoad imklog.so # provides kernel logging support (previously done by rklogd) #$ModLoad immark.so # provides --MARK-- message capability # Provides UDP syslog reception #$ModLoad imudp.so #$UDPServerRun 514 # Provides TCP syslog reception #$ModLoad imtcp.so #$InputTCPServerRun 514 #### GLOBAL DIRECTIVES #### # Use default timestamp format $ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat # # (BUG!) # FQDN must be the first directive or it is not honored # http://bugzilla.adiscon.com/show_bug.cgi?id=192 #$PreserveFQDN on ... omitted... </config> [0] http://bugzilla.adiscon.com/show_bug.cgi?id=192 [1] http://serverfault.com/questions/274625/how-do-i-get-rsyslogd-to-log-a-serv… [2] http://bugzilla.adiscon.com/buglist.cgi?query_format=advanced&short_desc_ty… [3] http://bugzilla.adiscon.com/show_bug.cgi?id=321 ---~~.~~--- Mike // SilverTip257 //

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Re: [CentOS] libre office
by Fernando Cassia 11 Jul '12

11 Jul '12

On Wed, Jul 11, 2012 at 9:06 AM, Steve Clark <sclark(a)netwolves.com> wrote: > I think it is more the fact the Oracle seems to be two faced in their > dealings with foss as > opposed to IBM. Since the Sun acquisition, and despite the LO-OpenOffice spat (which btw the 'community' forkers destroyed the future of the former Sun StarOffice, in the name of freedom, of course), most of the former Sun FOSS projects -at least the mainstream ones- have been doing well: Virtualbox, GPL Java SE (OpenJDK), NetBeans, Glassfish J2EE server, MySQL, even while Oracle had other proprietary products in its arsenal that would overlap (ie JDeveloper freeware overlaped with NetBeans, yet Oracle continued with Netbeans development nevertheless, with v7.2 just released and extended for better PHP/C++ support). Having said that, I wouldn't touch Oracle's propietary offerings even with the proverbial 20ft pole -mostly because I cannot afford any and there are worthy alternatives which are totally free- but Sun's FOSS projects I care about are alive and doing well (even OO under Apache's). I recorded some of the doom and gloom predictions (ie "MySQL will die") vs the reality on a news story last year http://news.techeye.net/software/despite-anti-oracle-hysteria-firm-is-an-op… After that they even complied with their promise of starting to open source JavaFX 2.0 http://openjdk.java.net/projects/openjfx/ OK, now let's concentrate on CentOS... :) FC -- During times of Universal Deceit, telling the truth becomes a revolutionary act - George Orwell

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System crash -- no clue why
by Michael Eager 10 Jul '12

10 Jul '12

Hi -- My CentOS 5.8 server crashed, leaving no clue why. The last entry in /var/log/messages is a dhcpd notice around 4:00am, followed by the restart message when I rebooted. The only clue that I have is that the fan was running full speed when I restarted it. The fan slowed to normal speed. Any ideas what I can do to find out the cause? -- Michael Eager eager(a)eagercon.com 1960 Park Blvd., Palo Alto, CA 94306 650-325-8077

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Discuss July 2012