similar to: Live migration: Xen to KVM

Hello, I'd like to know if this is an hypervisor related problem or a libvirt one. I did this experiment: on VM I started watching a video on youtube. While video was in progress I started migration. Migration did not complete until video was not finished. I did another experiment: I installed a web server on VM. I then started an httperf stress test. As before migration did not complete

I am using QEMU/KVM, using Live Migrations like this: virsh migrate --live ${name} qemu+ssh://${DESTINATION}/system My question, running this command makes it hang in the foreground. Is there a way for this to return immediately, so I can just poll for the migration status? Also, is there a way to _cancel_ a migration? I see the --timeout option, however if a given timeout is reached I would

​Hello, I have been trying to track different phases of a live migration process. I am using libvirt ​with qemu-kvm. I am issuing migration commands using virsh. Now, I want to measure the time spent in each phase of live migration, e.g., pre-copy and stop-copy. I stumbled upon the file qemu_driver.c. It has functions like qemudDomainMigratePrepare2 qemudDomainMigratePerform

Hi all, When I live migrate a vm using "migrate --live --copy-storage-all mig-vm qemu+ssh://192.168.1.3/system tcp://192.168.1.3" I got the following error WARNING: Image format was not specified for 'nbd://node2:49155/drive-virtio-disk0' and probing guessed raw. 258 Automatically detecting the format is dangerous for raw images, write operations on

Hi all, I'm investigating the ways to improve the live migration performance in libvirt. I have a question about the vm live storage migration. the platform is libvirt + qemu + kvm If we want to migrate a running vm with its virtual disk images to another node. we can use 'virsh migrate ....' commands. What if this vm has a number of disk-only external snapshots? In the current

Hi Eric, Thanks for your reply! I have the follow up questions blew. On Wed, Feb 11, 2015 at 11:52 AM, Eric Blake <eblake@redhat.com> wrote: > On 02/11/2015 10:08 AM, Edward Young wrote: > > Hi all, > > [probably didn't need to cross-post to quite that wide of an audience, > oh well] > > > > > I'm investigating the ways to improve the live

Thanks Eric. So, I need to look at QEMU. Do you know which files/functions should I look at? ​-- Faiz​ On Thu, Mar 20, 2014 at 12:41 PM, Eric Blake <eblake@redhat.com> wrote: > On 03/20/2014 10:05 AM, Faizul Bari wrote: > > ​Hello, > > > > I have been trying to track different phases of a live migration > process. I > > am using libvirt ​with qemu-kvm. I am

Hi Eric, Please see the blew: On Wed, Feb 11, 2015 at 3:12 PM, Eric Blake <eblake@redhat.com> wrote: > On 02/11/2015 02:07 PM, Edward Young wrote: > >>> What if this vm has a number of disk-only external snapshots? In the > >>> current version, how can live migrate this vm? > >> > >> Are the snapshots based on shared storage, or local-only

Hello, everybody.? ? ?I use?NFS to do live migration?After input ?virsh --connect=qemu:///system --quiet migrate --live vm12 qemu+tcp://pcmk-1/system ?(vm12 ?is vm name,/pcmk-1 is host name)it use almost 10s for preparation.?During the 10s,the vm is still runing and can ping other vm. But if i input mkdir pcmk-6 in vm during the 10s,it say :mkdir: cannot create directory `pcmk-6': Read-only

Hi, Could anyone provide (or point me to) information on how KSM merging behaves when performing live migrations? Does libvirt perform any special work to trigger KSM scanning of the migrated pages? Any guidance is appreciated. James

Hello, I am working on live migration of virtual machine using xen and kvm.If i use qemu+ssh:///system then is the transport protocol used during live migration tcp or ssh?I mean i want to evaluate the performance of transport protocil during live migration using wireshark and netperf tool,so using this command will show tcp performance? Orelse i will have to use qemu+tcp:/// ?

hi,all this error occured when live migration windows os, log of that vm is: features 0x1e unsupported allowed features 0x71000002 qemu warning error while loading state for instance 0x0 of device '0000:00:04.4/virtio-console' do you have some idea about that? thanks

Hello everyone, Can somebody point where I can find the code where libvirt makes the decision to complete a live migration? I mean, at some point syncronising the VM state, it has to decide that the delta left to be migrate is low enough to achieve downtime 0, so libvirt finishes the migration. This "low enough" must be defined somewhere in the code, but I am unable to find it.

Hi libvirt team, I was trying to migrate an OpenVZ domain from one host to another host. It seems that the live migration of OpenVZ container is there ( https://openvz.org/Migration_from_one_HN_to_another), but it haven't been integrated to libvirt yet. In particular, I ran the following commands and it failed: $ sudo virsh migrate --live --verbose --undefinesource 101 openvz+ssh://

Dear all, I am planning to use live block migration with one VM running on local disk and also attached additional disk from iSCSI or other shared storage. When block migration, not only local VM disk is copied to the destination but also the attached additional disk from shared storage. It is not desired in this situation. I just want the local VM disk is copied. Is there anyway to do this

I have lvm based (thin pool) storage on local disks. I need to move vps from one vg on one disk to another. Does it possible to migrate to localhost with blockcopy migration to another vg? I'm understand that i can move lv from one vg to another, but i don't need that. -- Vasiliy Tolstov, e-mail: v.tolstov@selfip.ru jabber: vase@selfip.ru

Hello, I'd like to live migration with snapshots. But it doesn't work. It comes out a message "cannot migrate domain with 1 snapshots" Then I try to trace the code(Libvirt 0.9.8 to 1.0.3), I find out the code in src/qemu/qemu_migration.c @ Line 1395 - 1440 (Libvirt 1.0.3) It will check the VM which has snapshots or not. I just curious about this limitation, why the VM

I installed CentOS 7 which supported by default a newer version of qemu-kvm (qemu-kvm-1.5.3-60.el7.x86_64.rpm) but this time I got new error: << error: internal error: unable to execute QEMU command 'migrate': this feature or command is not currently supported >> but it's kind of wired because qemu-kvm-1.0 supported already live migration, so a newer version should also

Hello everyone, I have a issue about the KVM block migration. Please give me some help. 1) I use the "virsh create" command to start a KVM VM in source machine. 2) And then, I use "virsh migrate" cammand to start a block migration: # virsh migrate --live --copy-storage-all --verbose win7 qemu+ssh:// 186.100.8.136/system root at 186.100.8.136's password:

# virsh snapshot-create-as small snap1 --disk-only --atomic error: Operation not supported: live disk snapshot not supported with this QEMU binary OS used: CentOS 7 #virsh version Compiled against library: libvirt 1.1.1 Using library: libvirt 1.1.1 Using API: QEMU 1.1.1 Running hypervisor: QEMU 1.5.3 Any help would be greatly appreciated. Best Regards, Payes