virt April 2013

virt@lists.centos.org

12 participants
8 discussions

Package lists for Cloud images
by Karanbir Singh 31 May '13

31 May '13

hi Guys, As we get ready to start publishing Cloud Images ( or rather images consumable in various virt platforms, including public and private clouds ) - it would be great to have a baseline package manifest worked out. What / how many images should we build. At this time we were thinking of doing : - CentOS-5 32bit minimal - CentOS-6 32bit minimal - CentOS-5 64bit minimal - CentOS-6 64bit minimal - CentOS-5 64bit LAMP - CentOS-6 64bit LAMP What would be the minimal functional requirements people would expect from these images ? and what rpms should be installed ? Should root login be enabled or should we require people to go in via a 'centos' user. Should the image be self-updating, or should we have a post-login message that indicates outstanding updates ? -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh ICQ: 2522219 | Yahoo IM: z00dax | Gtalk: z00dax GnuPG Key : http://www.karan.org/publickey.asc

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CentOS-6.4 AMI's for testing
by Karanbir Singh 28 May '13

28 May '13

hi, We are going to run a public test cycle for the CentOS AMI's that we publish as the official ones. This test will run for 1 week, ending on the 4th May, when we will do the formal release. Request: please dont use these AMI's for production, please dont use these AMI past the 4th of May. For all change and fix requests, either post to this list and we will attempt to get things turned around super quick, or find either Tru or me in #centos-devel or #centos-virt on irc.freenode.net. Our nicknames are tru_tru and z00dax respectively. These AMI's exist in us-east1 for now. Please keep them there. For release, we will have the images in the MarketPlace, as we did for 6.3. But we will also publish the AMI's in every region ( including sydney! ) and make sure the ID's are well documented, additionally, we will publish the raw backing files, so people can take these images to on-premise or non AWS resources as well. Once we have reasonalbe confidence in the images, I will convert them into EBS backed as well : ami-ede18284 CentOS-6.4/x86_64 Base OS AMI ami-43cfac2a CentOS-6.4/x86_64 Base OS + Updates/20130427 AMI ami-b5c8abdc CentOS-6.4/i386 Base OS AMI ami-d9ceadb0 CentOS-6.4/i386 Base OS + Updates/20130427 AMI Note: These AMI's have only been tested via a single instantiation, and ssh login + logout. The distro tests for these ami's are currently running, and I will report succes / fails to the list as a followup. Also, worth noting : while building the i386/updates image; about 90% of all instantiations failed with a xen/pae kernel error. I'm not sure why the aki, in this case aki-b6aa75df, seems to get confused about the disk hosted kernel type. If anyone else also sees this, let me know. for now, I'm writing this off as a flaky something. -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc

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freebsd as kvm guest
by mattias 30 Apr '13

30 Apr '13

seems not possible to run a freebsd kvm guest on centos 6 all i get in the log using dmesg are something about mmio emulation failed

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ovf conversion
by Markus Falb 19 Apr '13

19 Apr '13

I try do use one of the images available from [1] These images comes in two flavors, one vmx, one ovf. I do not know how to convert one of these to centos6-libvirt-kvm virt-convert gives me an error $ virt-convert -i ovf -o virt-image path_to_image.ovf ERROR Couldn't convert disks: Disk conversion failed with exit status 1: qemu-img: Could not open 'path_to_image.vmdk' The vmdk does exist. It seems that qemu-img can not handle this vmdk format. I am also not sure if v2v could do it. I think the essence of my post is the question Is it possible to use vmx or ovf images with kvm, possibly after converting them? [1] http://info.puppetlabs.com/download-learning-puppet-VM.html -- Kind Regards, Markus Falb

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OpenStack on CentOS
by Karanbir Singh 16 Apr '13

16 Apr '13

Hi, For those that missed this : http://openstack.redhat.com/ targets CentOS directly; Regards -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc

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Timer/ISR1 errors have returned in kernel-xen-2.6.18-348.3.1.el5
by David Young 10 Apr '13

10 Apr '13

Hi all, We recently upgrade from CentOS 5.8 to CentOS 5.9 on kernel-xen-2.6.18-348.3.1.el5, and after booting into the new kernel, noted large amounts of these messages every second or so in the logs: Mar 30 21:38:35 atlas2 kernel: Warning Timer ISR/0: Time went backwards: delta=-1393683849 delta_cpu=22316151 shadow=225003685197135 off=129240997 processed=225005208029053 cpu_processed=225003792029053 On both the dom0 and the domUs. Some reading indicates that this _was_ a fault fixed in 2009/2010, but it seems to have resurfaced on the latest kernel. For now, we've reverted back to an earlier kernel. Has anybody else seen this recently, or got any insight? Thanks, David

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Re: [CentOS-virt] [CentOS] qemu-kvm high cpu usage with idle windows guest
by Banyan He 07 Apr '13

07 Apr '13

Maybe you can print out what it is doing, then try to figure out if they are doing good. My linux works good, never tried windows. ------------ Banyan He Blog: http://www.rootong.com Email: banyan(a)rootong.com On 4/7/2013 10:21 PM, Micky wrote: > Windows 2k8 R2 guest with updated virtio drivers is idle inside but on > the host qemu-kvm process uses 7-15% cpu. > > Things that have been tried without any significant success > - removed tablet device > - manually set cpu topology for cores per socket > > Is it just me or the qemu-kvm has little tolerance with windows? > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > http://lists.centos.org/mailman/listinfo/centos >

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Can I have more than 1 bridge attached to a KVM
by Meir Hazon 02 Apr '13

02 Apr '13

Hello Everybody, I have a physical machine with 4 Ethernet cards that I have mapped to 4 bridges. I would like to have each of my KVMs use 2 bridges for NIC bonding. 1. Can I have more than one bridge assign to one KVM? 2. Can I use virt-install to assign a KVM with more than one bridge during the KVM installation? a. It was a long shot but I have tried bridge=br0,br1 ; bridge=br0 bridge=br1 - never worked..... Thanks so much, Meir

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virt April 2013