Discuss December 2013

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176 participants
155 discussions

kvm: vm root fs becomes ro
by Paul Heinlein 03 Dec '13

03 Dec '13

I've a the following happen a couple times now, and my internet searches are failing to locate an answer to the problem. We've got a few servers that primarily house VMs using KVM. They've got E-3 cpus and 32 GB RAM, and they run stock CentOS 6.4, fully patched (not yet migrated to 6.5). The VM disk images are housed on an NFS server. None of the VMs is particularly resource-hungry. They run a variety of Linux distros: CentOS 5/6, Debian 6/7. I'll start to see the VMs fail to write files to their local filesytems. No machine in the chain has rebooted or been updated in any significant way, but the root filesystem is off-limits. (This will happen on just one of our servers; the other VM platforms run without issue.) In /var/log/messages, I'll see the following entry for each impacted VM: <date> <host> kernel: kvm: <pid>: cpu0 disabled perfctr wrmsr: 0xc1 data 0xabcd In /var/log/libvirt/qemu/<vm-name>.log, I'll see block I/O error in device 'drive-virtio-disk0': Stale file handle (116) Oddly, the underlying host might be running, say, five VMs, but only four of them will get the log messages, and show the read-only symptoms, while the fifth just keeps chugging along. Googling suggests that the "disabled perfctr wrmsr" message is harmless, but my experience suggests otherwise. Any hints, workarounds, or relevent information is very welcome. Thanks! -- Paul Heinlein heinlein(a)madboa.com 45°38' N, 122°6' W

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Thanks on 6.5
by m.roth＠5-cent.us 03 Dec '13

03 Dec '13

Hey, Johnny et al, Thanks for the hard work, and quick followup to upstream. What's especially nice for us, and for other folks using CentOS at US federal gov't agencies, is that finally, the stock ssh-agent works seamlessly with pkcs11 and PIV/CAC cards, which is being required across the board. We'd been building our own openssh pieces... (and it was my manager that pushed that enhancement through a RH request <g>) mark

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Where to put the kernel driver for a Fibre Channel HBA card.
by Arun Khan 02 Dec '13

02 Dec '13

CentOS 6.4 (amd64) stock kernel. HBA FC Accusys ACS 63200NT I built the driver from source, insmod activates the device and I can see the 24 TB storage volume via 'parted --list' I have created a XFS files system and mounted it under /srv/ Where do I need to install the driver in /lib/modules/ ... directory tree so that it is loaded automatically when the system boots? TIA, -- Arun Khan Sent from my non-iphone/non-android device

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Problem upgrading from CentOS 6.4 to 6.5
by Gilbert Sebenste 02 Dec '13

02 Dec '13

Hello everyone, I had an issue with one of three servers upgrading from 6.4 to 6.5. It did not have the CR repo enabled. It failed dueing install, but I didn't catch the error (bad, bad, I know). OK, so it told me to run yum-complete transaction. After going through and figuring out what it had to do, it stops with this error: (etc, etc...) --> Processing Dependency: pkgconfig(ORBit-2.0) for package: libbonobo-devel-2.24.2-5.el6.i686 --> Processing Dependency: ORBit2-devel >= 2.7.5 for package: libbonobo-devel-2.24.2-5.el6.i686 ---> Package libgnomecanvas-devel.i686 0:2.26.0-4.el6 will be erased ---> Package polkit-docs.i686 0:0.96-5.el6_4 will be erased --> Processing Dependency: polkit-docs = 0.96-5.el6_4 for package: polkit-devel-0.96-5.el6_4.i686 --> Running transaction check ---> Package libbonobo-devel.i686 0:2.24.2-5.el6 will be erased ---> Package polkit-devel.i686 0:0.96-5.el6_4 will be erased --> Finished Dependency Resolution Error: Trying to remove "yum", which is protected You could try using --skip-broken to work around the problem ** Found 216 pre-existing rpmdb problem(s), 'yum check' output follows: ModemManager-0.4.0-5.git20100628.el6.i686 is a duplicate with ModemManager-0.4.0-3.git20100628.el6.i686 1:NetworkManager-0.8.1-66.el6.i686 is a duplicate with 1:NetworkManager-0.8.1-61.el6_4.i686 1:NetworkManager-glib-0.8.1-66.el6.i686 is a duplicate with 1:NetworkManager-glib-0.8.1-61.el6_4.i68 (etc) Any ideas on how to fix this? A "yum update" tells me to run yum-complete-transaction. For those who respond, I thank you for your time, I appreciate it! Gilbert ******************************************************************************* Gilbert Sebenste ******** (My opinions only!) ****** *******************************************************************************

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NetFilter Detection
by Robert Clove 02 Dec '13

02 Dec '13

Hi All, I was searching around but was not able to find out. We all know that packet traverses through the Net Filter hooks but how to practically realize that. Please guide Regards Clove

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CentOS Hardware clock time setting.
by Anand Singh 02 Dec '13

02 Dec '13

Hi, I would like to sync my CentOS 6.3 hardware clock time to my NTP server's time. Can I do that without reboot the hosts? If yes, it would be great if anyone of you can provide me steps to do that. I am newbie in CentOS. Thanks, Anand Singh

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Thank You To The CentOS Team
by Mark LaPierre 02 Dec '13

02 Dec '13

Hey all you dedicated folks out there who support the CentOS project. Thank you all for your dedicated effort and the great deal of work to get the 6.5 release up and running. Thank you all! -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

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Kernel panic with VMware Workstation 8.0.6 and 6.5 kernel
by B.J. McClure 02 Dec '13

02 Dec '13

There is apparently a kernel bug that creates a kernel panic when starting a windows guest in vmware workstation. I have experienced this bug on two machines, both with workstation 8.0.6 but it has been reported with other versions as well: https://communities.vmware.com/message/2318686 . Booting kernel 2.6.32-358.23.2.el6.x86_64 instead of 2.6.32-431.el6.x86_64 resolves the issue. Just a heads up for those who may encounter it. Cheers, B.J.

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too many groups for a user?
by Dirk Olmes 02 Dec '13

02 Dec '13

Hi, we're exporting a number of directories via samba shares. To manage access for individual users, the files are put into different groups, users who get access to the files will be put into the respective groups. It seems there's a limited number of groups that a user can be member of - googling around comes up with wildly different numbers from 16 up to 64k. The limit for CentOS seems to be around 32 ... can anyone confirm? Thanks, -dirk

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CentOS-announce Digest, Vol 106, Issue 1
by centos-announce-request＠centos.org 02 Dec '13

02 Dec '13

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-2013:1775 CentOS 5 grub Update (Johnny Hughes) 2. Release for CentOS-6.5 i386 and x86_64 (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Fri, 29 Nov 2013 14:49:59 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2013:1775 CentOS 5 grub Update To: centos-announce(a)centos.org Message-ID: <20131129144959.GA4761(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2013:1775 Upstream details at : https://rhn.redhat.com/errata/RHBA-2013-1775.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 7f15d4ed0d3f92bfcc61a2c3e056a285b26079913dd732bb2d475d0b130c84ff grub-0.97-13.11.el5_10.1.i386.rpm x86_64: c269b955ada5cf7d556454a212a8de79a01578ed49e9592dee32bc996a2317c6 grub-0.97-13.11.el5_10.1.x86_64.rpm Source: 6dadb3df15630ba857e7cb7ab6fbbcc8148cda833ead5e4f757cedd542cdec84 grub-0.97-13.11.el5_10.1.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Sun, 01 Dec 2013 16:03:27 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] Release for CentOS-6.5 i386 and x86_64 To: CentOS Announcements List <centos-announce(a)centos.org> Message-ID: <529B5DCF.2070400(a)centos.org> Content-Type: text/plain; charset=ISO-8859-1 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 We are pleased to announce the immediate availability of CentOS-6.5 install media for i386 and x86_64 Architectures. Release Notes for 6.5 are available at http://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.5 - we recommend everyone looks through those once. CentOS-6.5 is based on the upstream release EL 6.5 and includes packages from all variants. All upstream repositories have been combined into one, to make it easier for end users to work with. There are many fundamental changes in this release, compared with the past CentOS-6 releases, and we highly recommend everyone stufy the Release Notes as well as the upstream Techical Notes about the changes and how they might impact your installation. All updates released since upstream 6.5 release are also released to the CentOS-6.5 mirrors. Everyone who has centos-cr repositories enabled and in use, would already be running CentOs-6.5 as of one week ago and will notice only the centos-release rpm update today. +++++++++++++++++++++++ Upgrading from CentOS-4 or CentOS-5: We recommend everyone run through a reinstall rather than attempt an inplace upgrade from CentOS-4 or CentOS-5. +++++++++++++++++++++++ Upgrading from CentOS-6.0 / 6.1 / 6.2 / 6.3 or 6.4 Unless you have edited your yum configs, a 'yum update' should move your machine seamlessly from any previous CentOS-6.x release to CentOS-6.5 +++++++++++++++++++++++ Downloading CentOS-6.5 for new installs: When possible, consider using torrents to run the downloads. Usually its also the fastest means to download the distro. Torrent files for the DVD's are available at : http://mirror.centos.org/centos/6.5/isos/i386/CentOS-6.5-i386-bin-DVD1to2.t… http://mirror.centos.org/centos/6.5/isos/x86_64/CentOS-6.5-x86_64-bin-DVD1t… You can also use a mirror close to you : http://www.centos.org/modules/tinycontent/index.php?id=30 Most mirrors will allow direct DVD downloads over http, ftp and rsync. Please keep in mind that not all mirrors are currently updated, some might take upto another 24 hours before they have all the content. We have also made efforts to try and ensure that most install types and roles can be run from DVD-1 itself. +++++++++++++++++++++++ sha1sum for the CentOS-6.5 ISOS: i386: 67ea68068ae53d1f23431072ec0288b3e1abfe4d CentOS-6.5-i386-bin-DVD1.iso 70fe3b01ce8133fa7e6e7dbfcb9f1acdb1e9981f CentOS-6.5-i386-bin-DVD2.iso 3cf41ef12362ad363ff0650c703d3d045bcbfa7a CentOS-6.5-i386-LiveCD.iso 73d6444e2576e1169035d2444f872ff622ed85b6 CentOS-6.5-i386-LiveDVD.iso 4f900bba81d0e3c5cc5354a94984ed2fa03d4061 CentOS-6.5-i386-minimal.iso e2e637dfbb08c04a478362733ee906ba9485771d CentOS-6.5-i386-netinstall.iso x86_64: 32c7695b97f7dcd1f59a77a71f64f2957dddf738 CentOS-6.5-x86_64-bin-DVD1.iso 25e5de362ba6c75d793dbeb060b27ba1865cb5df CentOS-6.5-x86_64-bin-DVD2.iso 690ccc84926a46152543a3cad57d983c9004638d CentOS-6.5-x86_64-LiveCD.iso 3ac5eb9a6dcbf5f2b4cfd2432cccd84cd722840d CentOS-6.5-x86_64-LiveDVD.iso f21a71e8e31df73297bdd1ccd4a64a36831284bd CentOS-6.5-x86_64-minimal.iso 3a9662cb65f9d59677d76acfdb73289da43b4599 CentOS-6.5-x86_64-netinstall.iso +++++++++++++++++++++++ LiveCD and LiveDVD LiveCD and LiveDVD media is also released into the ISOS/ directory. You can download these from either a mirror close to you or the torrents listed here : http://mirror.centos.org/centos/6.5/isos/i386/CentOS-6.5-i386-LiveCD.torrent http://mirror.centos.org/centos/6.5/isos/i386/CentOS-6.5-i386-LiveDVD.torre… http://mirror.centos.org/centos/6.5/isos/x86_64/CentOS-6.5-x86_64-LiveCD.to… http://mirror.centos.org/centos/6.5/isos/x86_64/CentOS-6.5-x86_64-LiveDVD.t… +++++++++++++++++++++++ Cloud Images Images for various on-preimse and off-premise Cloud environments are currently under development for CentOS-6.5 and will be released in the coming days. Everyone looking to join and help with the CentOS Cloud efforts is encouraged to join the CentOS-Virt list where such issues are discussed ( http://lists.centos.org/mailman/listinfo/centos-virt ). +++++++++++++++++++++++ Getting Help: The best place to start when looking for help with CentOS is at the wiki ( http://wiki.centos.org/GettingHelp ) which lists various options and communities who might be able to help. If you think there is a bug in the system, do report it at http://bugs.centos.org/ - but keep in mind that the bugs system is *not* a support mechanism. +++++++++++++++++++++++ Metups and training sessions The next CentOS Dojo is going to take place at Austin, TX, USA on the 6th December 2013. Details on the day, venue and registration are available at http://wiki.centos.org/Events/Dojo/Austin2013 As 2014 comes up, we've started planning for the Dojo Schedules for the next year. If you would like to get involved in helping organising, running, presenting or sponsoring a Dojo or even just want more detail do get in touch with us at the CentOS Promo list (http://lists.centos.org/mailman/listinfo/centos-promo) +++++++++++++++++++++++ Contributing and joining the project: We are always looking for people to join and help with various things in the project. If you are keen to help out a good place to start is the wiki page at http://wiki.centos.org/Contribute . If you have questions or a specific area you would like to contribute towards that is not covered on that page, feel free to drop in on #centos-devel(a)irc.freenode.net for a chat or email the centos-devel list (http://lists.centos.org) +++++++++++++++++++++++ Thanks to everyone who contributed towards making CentOS 6.5, specially the effort put in, as always, by the QA and Build team. A special shout out to all the donors who have contributed hardware, network connectivity, hosting and resources over the years. The CentOS project now has a fairly well setup resource pool, purely thanks to the donors. Enjoy! - -- Karanbir Singh <kbsingh(a)centos.org> The CentOS Project {http://www.centos.org} irc: z00dax(a)irc.freenode.net ( #centos, #centos-devel ) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlKbXc8ACgkQMA29nj4Tz1tsdACgqvWoCBaV/Eiplg28cYaxs6Jp rsEAnjfC+qLkGr+3bArO/UZKkyGO3lav =Qq62 -----END PGP SIGNATURE----- ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 106, Issue 1 ***********************************************

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Discuss December 2013