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Backing up Xen vm's
by Johan Vermeulen 19 Feb '14

19 Feb '14

Dear All, because the organization I work for has to enter the 21 century eventually, and encouraged by the the excellent wiki's available, I'm giving Xen a try. I' ve tested setting it all up but I have this question concerning making backups. i' ve noticed that virsh snaphot-create does not work, and googling this, I can find many posts describing making backups with rbackup, lvm , dd, .... The thing is there is not always a date with these posts and articles, so before I dig into this: Is this still the way this is done, or is there now a more straightforward way to backup ( Xen ) vm's? Many thanks for any advise. Greetings, J -- Johan Vermeulen IT-medewerker Powered by Linux.

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CentOS-announce Digest, Vol 108, Issue 10
by centos-announce-request＠centos.org 19 Feb '14

19 Feb '14

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-2014:0180 CentOS 6 qemu-kvm Update (Johnny Hughes) 2. CESA-2014:0185 Moderate CentOS 6 openswan Update (Johnny Hughes) 3. CESA-2014:0185 Moderate CentOS 5 openswan Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 18 Feb 2014 13:23:33 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2014:0180 CentOS 6 qemu-kvm Update To: centos-announce(a)centos.org Message-ID: <20140218132333.GA54919(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2014:0180 Upstream details at : https://rhn.redhat.com/errata/RHBA-2014-0180.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 2383345686dca1f3a23bfae3b838fc7bef97efaeb66fc3d3416c376afdb5ade1 qemu-guest-agent-0.12.1.2-2.415.el6_5.4.i686.rpm x86_64: 9eaa678f147150c915ed9273f4647102d52738392e03f6c79f41b1aedfb9ace4 qemu-guest-agent-0.12.1.2-2.415.el6_5.4.x86_64.rpm bc9ec843ba2009d0896b333009bd5c943e70dc82360cca61bdc840db6ed375cb qemu-img-0.12.1.2-2.415.el6_5.4.x86_64.rpm 7707f0c9b785bf9ae2ae825463e31637fb6edf29c70e794b1d4bb647cfb5c983 qemu-kvm-0.12.1.2-2.415.el6_5.4.x86_64.rpm db5770588c45dfbb3a3e4900b87e255589cefe272ec241484f1395955a7ffaab qemu-kvm-tools-0.12.1.2-2.415.el6_5.4.x86_64.rpm Source: 0bdc3c6f1d8727359c710d1bd346db295227940aba10e59bd61991e856f04121 qemu-kvm-0.12.1.2-2.415.el6_5.4.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Tue, 18 Feb 2014 19:52:25 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2014:0185 Moderate CentOS 6 openswan Update To: centos-announce(a)centos.org Message-ID: <20140218195225.GA61989(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2014:0185 Moderate Upstream details at : https://rhn.redhat.com/errata/RHSA-2014-0185.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 1def2fa69c56c6f84972baabc1e539ffb6f2625238e70ebb42b16033fdd9caa7 openswan-2.6.32-27.2.el6_5.i686.rpm 499bd9942ebe39752075abb4a35d052b5e5ac955b319d69787a801b93ef274cc openswan-doc-2.6.32-27.2.el6_5.i686.rpm x86_64: 50a8eac89f569679f2dc979fa6a20a6ba24f535006f3bbc451d74235ab56d01e openswan-2.6.32-27.2.el6_5.x86_64.rpm 43cee7d5e32177ec036462fd16c5033a985109d078af53888b1d360071aec83f openswan-doc-2.6.32-27.2.el6_5.x86_64.rpm Source: e4b96c2b72447953227ea36ea03ee661ae30345b360f78d6a73695c33986a06c openswan-2.6.32-27.2.el6_5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Tue, 18 Feb 2014 20:30:42 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2014:0185 Moderate CentOS 5 openswan Update To: centos-announce(a)centos.org Message-ID: <20140218203042.GA443(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2014:0185 Moderate Upstream details at : https://rhn.redhat.com/errata/RHSA-2014-0185.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: f7b6b0ff7aab8768042b0c6096bb583d17c1155036f96314aca269e3f5108dc5 openswan-2.6.32-7.3.el5_10.i386.rpm 9096003fcc3f1d2f8f82d2c73afc6c2333b823316d476cdda4f3bf61b7c7e04c openswan-doc-2.6.32-7.3.el5_10.i386.rpm x86_64: a1f9b58d388a668ebf3cc80182be664105a26ae6052331ef3be814c4f44428da openswan-2.6.32-7.3.el5_10.x86_64.rpm b47208efd6da6a6e591b1d9de40f93f659b2dcdf2903b5658f8361fe5cc01371 openswan-doc-2.6.32-7.3.el5_10.x86_64.rpm Source: de5445404ead3a191dfc8058bd55f9cbdee8e3c4845629115d8f5b8005965172 openswan-2.6.32-7.3.el5_10.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 108, Issue 10 ************************************************

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new Centos 6.5 32 bit yum issue
by Dave Stevens 19 Feb '14

19 Feb '14

When I fire up the virtualbox VM Centos starts as I would expect, but when I try to use yum list updates (or any of several other yum command I've tried) I get a repo error - " Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=i386&repo=os error was 14: PYCURL ERROR 6 - "Couldn't resolve host 'mirrorlist.centos.org'" Error: Cannot find a valid baseurl for repo: base I looked in the repo.d and the base CentOS-Base.repo suggests that if the mirrorlist= does not work I should try the commented out baseurl= instead. But I don't seem to have nano and can't install it - yum install fails as above. Ideas? Dave -- Advertising is the rattling of a stick inside a swill bucket - George Orwell

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[OT] Video card radiator
by Michael Hennebry 17 Feb '14

17 Feb '14

I recently obtained a desktop computer with an nVidia video card: from lspci: 02:00.0 VGA compatible controller: nVidia Corporation G84 [GeForce 8600 GT] (rev a1 I had to open the case to connect the DVD drive and saw what appears to be a fallen radiator: http://www.cs.ndsu.nodak.edu/~hennebry/computer/amd64-1.jpg http://www.cs.ndsu.nodak.edu/~hennebry/computer/amd64-2.jpg That nothing is shorted out appears to be a matter of luck. Any suggestions regarding how to prevent the radiator from shorting its video card? A suggestion of who to ask would be good. -- Michael hennebry(a)web.cs.ndsu.NoDak.edu "SCSI is NOT magic. There are *fundamental technical reasons* why it is necessary to sacrifice a young goat to your SCSI chain now and then." -- John Woods

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Strange Samba Issue
by Jeff Allison 17 Feb '14

17 Feb '14

Ok so I built the microserver as a centos box and now I have a strange one I built a Centos 6.5 box with a 3.6 raid ext4 data drive on it, shared with samba. Now when I browse these folders on the console I can see the files. when I sftp on the command line from another box I can see these files. But when I browse via samba or using a gui sftp client quite a lot of these files are missing... Any ideas?

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deleting FakeRaid -> what happens to the partitions/data
by Jobst Schmalenbach 17 Feb '14

17 Feb '14

Hi A server has FakeRAID installed, I want to remove it to make it mdadm driven .... If I delete the FakeRAID including - disabling it in the BIOS - removing the dmraid driver from initrd - deleting all meta data from partitions - deleting all dmraid packages is the data still available on the drives, i.e. the partitions, filesystem and files are still ok? I know that FakeRAID controller is not a real hardware controller and the driver (thus CPU doing the work) makes it look like one drive ... So if you create a partition it would be a standard (and same) partition on each of the drive connected to a FakeRAID? This would me there are just normal drives with partitions and file system that is ready to be used after the deletion of the faeRAID? thanks Jobst -- Dont blink or you miss it! | |0| | Jobst Schmalenbach, jobst(a)barrett.com.au, General Manager | | |0| Barrett Consulting Group P/L & The Meditation Room P/L |0|0|0| +61 3 9532 7677, POBox 277, Caulfield South, 3162, Australia

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Memory Not Recognized
by Joseph Godino 17 Feb '14

17 Feb '14

Hello All, I noticed that my CentOS 6.5 system reports that I only have about 10.9 GiB of RAM when I actually have 16384M. I have already tried adding mem=xxM to the end of the kernel line in grub.conf. The result is the same. Any suggestions? Joe

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Mirroring Disk (Apologies for the new thread I deleted the original)
by Jeff Allison 17 Feb '14

17 Feb '14

Answers to questions... It really depends on your use case. I'm looking to be able to pull out old dead drive, and replace it with new (almost up to date) drive and reboot. The USB disk is a 1TB disk in a case. > Been considering dump and restoring to the usb disk periodically? or > maybe something using LVM or maybe creating and breaking a RAID 1 > array? Constantly making and breaking a RAID1 with a USB drive is probably not helpful. It's just more wear and tear on the OS drive, because it has to be constantly read in order to mirror the target drive, and your USB drive is probably not what you want to boot off of if your system drive fails. You'd be much better off with a permanent RAID1, but if you can't do that then at least make a RAID1 to a USB enclosure which contains the same size and interface drive as your current system disk. This way if it fails you can swap in the backup drive and not have to boot from a USB drive. Yeah I thought that would be the case, as I said above I'd like to be able to boot from the USB enclosure but the plan is to replace the failed internal with the disk from the USB enclosure. Would LVM be any help or is it just a complication? I defiantly leaning to the nightly dump/restore into a similarly formatted disk.

1 0

Filesystem gets corrupted after kernel upgrade to 2.6.32-431.5.1.el6
by Max Grobecker 16 Feb '14

16 Feb '14

Hi, I recently installed some fresh CentOS 6.5 machines and it took only about 20 minutes until the file system (ext4) was broken. And with "broken" I mean, that the system wasn't able to find vital system libraries any more! I were able to reproduce it on highly different systems: - A fresh installed CentOS 6.5 64 Bit on a virtual machine (KVM) - A system which I installed some weeks ago (also a KVM machine) and did a "yum update" which upgraded to kernel 2.6.32-431.5.1.el6. - A fresh installed CentOS 6.5 64 Bit on native hardware on a RAID 5 assembled with mdadm - A CentOS 6.4 system installed some months ago on native hardware with mdadm RAID 5 The last system wasn't able to boot after the upgrade and crashed with several kernel panics which I can show as a screenshot if there's any interest - but the display resolution was quite low so there are not many helpful information :-( Actually, I assume that there's anything broken with the new kernel or at least the kernel module for ext4 file system. You can reproduce it by just doing a "yum update" and rebooting the system. If it comes up, reboot it again and manually do an offline filesystem check - or just do some writing activities on the disks. Is it just me? I don't use any 3rd party repositorys and it blows my mind that no one else seems to notice...! Greetings from Wuppertal, Germany Max

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Emacs and Ispell, Aspell and Hunspell
by Mark Plowman 15 Feb '14

15 Feb '14

CentOS members, This is another CentOS, Emacs upgrade question: Since upgrading from CentOS 5.10 and Emacs 21.4.1 to CentOS 6.5 and Emacs 23.1.1 I am trying to get a spell checker working in emacs. Previously I used aspell and everything "just worked". Now I gather that hunspell is the norm but after installing it, when I try it it "just doesn't work". If I try to (for instance) spell check a region (ispell-region) the session hangs and a "ps axfu" from another seesion reveals: mark 8464 0.0 1.2 313764 50252 ? R Feb12 2:35 \_ /usr/bin/emacs -g 132x40-0-0 -f gnus mark 8700 0.0 0.0 103168 764 pts/0 Ss+ Feb12 0:00 | \_ /usr/bin/idn --quiet --idna-to-ascii --usestd3asciirules Again, some clue stick please... (My apologies for any spelling mistakes/typos in this email!) Greetings Mark -- If you have an apple and I have an apple and we exchange these apples then you and I will still each have one apple. But if you have an idea and I have an idea and we exchange these ideas, then each of us will have two ideas. -- George Bernard Shaw Do *not* use the following address, it's just a "spam trap": aaron02(a)plowman.nl

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