Re: [CentOS-virt] Can I install Slackware 13.1 as Xen-Guest?
No error message. The installation show Slackware boot: press ENTER or F2. But when I press ENTER or F2 then nothing happend. I am using Slackware 13.1 32 bit. From: compdoc comp...@hotrodpc.com To: Discussion about the virtualization on CentOS centos-virt@centos.org Sent: Sat, July 24, 2010 10:23:19 PM Subject: Re: [CentOS-virt] Can I install Slackware 13.1 as Xen-Guest? Trying with their 32bit version, I get a kernel panic – not syncing : VFS” unable to mount root. This is on KVM using the default IDE emulator. What kernel panic message are you getting? ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] Vmware to KVM - possible?
Is it possible to convert a VMWare image to KVM? As I have been building a few test machines on Vmware Fusion and would like to migrate some to a KVM server. Thanks in advance. Matt Keating Linux System Admin Dennis Interactive 30 Cleveland St, London, W1T 4JD Tel: 020 7907 6823 (direct line) Fax: 020 7907 6600 (fax) P Please consider the environment before printing this e-mail NOTE: The information in this email is confidential and may be legally privileged, unless stated to the contrary. If you are not the intended recipient, you must not read, use or disseminate that information. Any opinions or comments are personal to the writer and do not represent the official view of Dennis Publishing Ltd. If you have received this email and are not a named addressee, please contact itdirec...@dennis.co.uk immediately by reply email and then delete this message from your system. Please do not copy it or use it for any purpose, or disclose its contents to any other person. Although this email and any attachments are believed to be free of any virus, or other defects, it is the responsibility of the recipient to ensure that they are virus free and no responsibility is accepted by Dennis Publishing Ltd for any loss or damage arising from the receipt or use thereof. Company registered in England No. 1138891 Registered office: 30, Cleveland Street, London, W1T 4JD image.jpg___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Can I install Slackware 13.1 as Xen-Guest?
I use the desktop and the virt manger gui to setup and install, so I get to watch the boot… ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Vmware to KVM - possible?
I have successfully migrated VM`s from ESXi to KVM. To convert disk I use next command: qemu-img convert -f vmdk -O qcow2 dist-flat.vmdk disk.img You also can use raw instead of qcow2. But I have some troubles with MS Windows machines. It falls to BSoD caused by lame disk drivers. Mon 26 July 2010 20:05:45 Matt Keating wrote: Is it possible to convert a VMWare image to KVM? As I have been building a few test machines on Vmware Fusion and would like to migrate some to a KVM server. Thanks in advance. Matt Keating Linux System Admin -- Yours sincerely Sergiy Yegorov RHCT signature.asc Description: This is a digitally signed message part. ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Vmware to KVM - possible?
Is it possible to convert a VMWare image to KVM? As I have been building a few test machines on Vmware Fusion and would like to migrate some to a KVM server. Thanks in advance. Matt Keating Linux System Admin Yes. Using qemu you can convert from .vmdk to qcow(2) or raw for instance. Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] which virtualization platform to choose
Friends I'm in doubt here: which virtualization platform to choose and why? If I have just installed a VM I choose Xen or KVM? And when I have more than 5 or 10 VM's? Please, I need your help to choose right. Thanks -- Gilberto Nunes ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] which virtualization platform to choose
On Mon, Jul 26, 2010 at 1:30 PM, Gilberto Nunes gilberto.nune...@gmail.com wrote: Friends I'm in doubt here: which virtualization platform to choose and why? If I have just installed a VM I choose Xen or KVM? And when I have more than 5 or 10 VM's? Please, I need your help to choose right. Thanks -- Gilberto Nunes ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt It depends on which clients are you going to virtualize, personally I like using KVM for the simplicity to run Windows and Linux guests. -- Linux User #452368 http://twitter.com/vpadro Everything that irritates us about others can lead us to an understanding of ourselves ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] which virtualization platform to choose
KVM seems to have a future in centos. I have a couple of servers running kvm, with only 4 cores per server. I tend use 1 real core for each virtual cpu assigned to the guests, because I don't need that many guests. So, I can't speak to scaling... Performance is excellent, however. It's been a year or more since I've tried ESXi or xen on ubuntu, but I was always disappointed in the speed at which the guests ran. That's why I turned to xenserver for its speed and GUI, and then to KVM for its speed and complete control over things like nics and network configurations. KVM works great ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] which virtualization platform to choose
Hi... How manu guest do you running?? thanks 2010/7/26 compdoc comp...@hotrodpc.com: KVM seems to have a future in centos. I have a couple of servers running kvm, with only 4 cores per server. I tend use 1 real core for each virtual cpu assigned to the guests, because I don't need that many guests. So, I can't speak to scaling... Performance is excellent, however. It's been a year or more since I've tried ESXi or xen on ubuntu, but I was always disappointed in the speed at which the guests ran. That's why I turned to xenserver for its speed and GUI, and then to KVM for its speed and complete control over things like nics and network configurations. KVM works great ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt -- Gilberto Nunes ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] SOLVED: Re: CentOS 5.4 KVM: PXE boot problem
Having installed the following packages the problem was solved: kernel-2.6.18-194.8.1.el5 kvm-83-164.el5 kmod-kvm-83-164.el5 etherboot-roms-kvm-5.4.4-13.el5.centos etherboot-zroms-kvm-5.4.4-13.el5.centos Cheers, Vladimir 2010/7/19 Momonth momo...@gmail.com: Hi All, I'm playing with KVM in order to adopt the technology for dev / testing purposes. Installing RHEL5 from ISO images works ok, no problems with installation. The problem occurs with PXE boot - it is simply doesn't try to do PXE boot, according to what I can see: Booting from Hard Disk... Boot from Hard Disk failed: not a bootable disk FATAL: No bootable device. _ I have: CentOS release 5.4 (Final) , 2.6.18-194.8.1.el5 x86_64 kernel libvirt-0.3.3-7.el5 etherboot-roms-kvm-5.4.4-13.el5.centos libvirt-python-0.3.3-7.el5 etherboot-pxes-5.4.4-13.el5.centos etherboot-zroms-5.4.4-13.el5.centos etherboot-roms-5.4.4-13.el5.centos kvm-36-1 kmod-kvm-36-3 etherboot-zroms-kvm-5.4.4-13.el5.centos What I'm doing wrong? Any help is appreciated. Thanks, Vladimir ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] which virtualization platform to choose
On Mon, Jul 26, 2010 at 2:03 PM, Gilberto Nunes gilberto.nune...@gmail.com wrote: Hi Victor... Me too!... When the year started, I installed a server with Xen 4.0, with 2.6.31.13 pvops kernel We have 15 VM on a Dell PowerEdge 1950 with 16 GB of memory and SAS disks... This sound like crazy thing I know that... All VM runs Windows 2003 Servers... Now I see that the performance on VM has decrease so much... Perhaps I would change to KVM from xen??? What you thing about??? 2010/7/26 Victor Padro vpa...@gmail.com: On Mon, Jul 26, 2010 at 1:30 PM, Gilberto Nunes gilberto.nune...@gmail.com wrote: Friends I'm in doubt here: which virtualization platform to choose and why? If I have just installed a VM I choose Xen or KVM? And when I have more than 5 or 10 VM's? Please, I need your help to choose right. Thanks -- Gilberto Nunes ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt It depends on which clients are you going to virtualize, personally I like using KVM for the simplicity to run Windows and Linux guests. -- Linux User #452368 http://twitter.com/vpadro Everything that irritates us about others can lead us to an understanding of ourselves ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt -- Gilberto Nunes ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt Perhaps you could run a test lab with the same VMs under KVM, but I can assure you performance will not be overkill, just 5-7% more, nevertheless KVM seems to be more stable on my Server Xeon X3440, 8GB, PERC 6, 8TB running 8 Windows 2K3 R2 VMs, it has been running for six months now without downtime. Saludos. -- Linux User #452368 http://twitter.com/vpadro Everything that irritates us about others can lead us to an understanding of ourselves ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Vmware to KVM - possible?
If you are using ESX/i remember that this hypervisor uses 2 kinds of disk type (in 4.0.x). VMDK monolithic flat and VMDK monolithic sparse. This disks types are directly supported from kvm. Monolithic flat is compounded for 2 files. * disk.vmdk is a text file with disk info * disk-flat.vmdk is a raw disk You can load disk-flat.vmdk directly in kvm. Marc Morata | Senior Support Engineer | Abiquo | +34 93 322 00 44 | marc.mor...@abiquo.com On Mon, Jul 26, 2010 at 8:26 PM, Alexander Dalloz ad+li...@uni-x.orgad%2bli...@uni-x.org wrote: Is it possible to convert a VMWare image to KVM? As I have been building a few test machines on Vmware Fusion and would like to migrate some to a KVM server. Thanks in advance. Matt Keating Linux System Admin Yes. Using qemu you can convert from .vmdk to qcow(2) or raw for instance. Alexander ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] which virtualization platform to choose
On Mon, Jul 26, 2010 at 03:30:38PM -0300, Gilberto Nunes wrote: Friends I'm in doubt here: which virtualization platform to choose and why? If I have just installed a VM I choose Xen or KVM? And when I have more than 5 or 10 VM's? Please, I need your help to choose right. It depends on many things. If your hardware doesn't have CPU virtualization extensions, then you only have one choice - Xen. If you want to use 32bit host OS, then you only have one choice - Xen. And if you run mainly Linux VMs then Xen is a good choice. -- Pasi ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] which virtualization platform to choose
2010/7/26 Pasi Kärkkäinen pa...@iki.fi: On Mon, Jul 26, 2010 at 03:30:38PM -0300, Gilberto Nunes wrote: Friends I'm in doubt here: which virtualization platform to choose and why? If I have just installed a VM I choose Xen or KVM? And when I have more than 5 or 10 VM's? Please, I need your help to choose right. It depends on many things. If your hardware doesn't have CPU virtualization extensions, then you only have one choice - Xen. Yes. All hardware has virt extensions... If you want to use 32bit host OS, then you only have one choice - Xen. Yes... All software is 32 bits And if you run mainly Linux VMs then Xen is a good choice. No... Mostly software is Windows based here... -- Pasi ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt -- Gilberto Nunes ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] which virtualization platform to choose
On Jul 26, 2010, at 12:03 PM, Gilberto Nunes wrote: [...] What you thing about??? As far as running 15 VMs, whether your hardware is suited to do that depends on how many spindles worth of SAS drives you have (improves concurrency), how busy your VMs are (IO and proc), how much the guests are swapping in case you're not giving them enough memory. And if you're not running virtio drivers, you should! I don't have the numbers, but several months ago I tested a few different Iometer meter workloads on Server 2003 R2 guests on PE1950 hardware against equivalently-matched VMs on the 1.x version of a popular proprietary product (dedicated memory instead of its default swap-mem-to-host-disk; also running the guest extensions), Xen on CentOS 5.4 with a then-recent build of GPLPV (meadowcourt.org/downloads) on the guests, and KVM (also CentOS 5.4) with somebody's build of unsigned virtio Windows drivers (was on a /~public_html from redhat.com I think). Results: Xen+GPLPV beat out KVM+virtio enough to be considered significant, but their difference seemed small compared to the margin they beat the other contender by. The proprietary one also had massive CPU load on the guest generated by running the test that the others didn't have. Obviously that's all very vague, but then again I'm sure somewhere I've accepted a EULA that says I'm not allowed to share benchmarking results for certain products :-). I'll be keeping Xen (and therefore CentOS 5.x) around to run Linux guests blazingly fast on still-usedful hardware. Everything else I'm (slowly) migrating to KVM in the interest of tracking with upstream. Xen's slight performance edge on Windows will be missed. YMMV. Eric ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] which virtualization platform to choose
If you want to use 32bit host OS, then you only have one choice - Xen. Yes... All software is 32 bits I think he meant if you had a 32bit host to run the guests on, and did not mean 32bit guests. If your hardware has virt extensions, then it's a 64bit host. KVM certainly runs 32bit and 64bit guests, and it runs linux guests just as well as windows... ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
