July 2013 - Users - libvirt List Archives

[libvirt-users] Custom Live Migration Query
by Aaron Clausen 09 Jul '13

09 Jul '13

I'm using KVM, libvirt and DRBD to come up with a custom mirroring and live migration setup. I have two servers, each running KVM and libvirt, and both using DRBD to mirror guests (which are stored on raw DRBD partitions). If I shut down a guest on one, I can easily get it up and running on the other without issue. I have run into some file system corruption trouble if I try to do a live migration. I have a test script just to test out the bare functionality I'm looking for (this script would run on the second KVM server; kvmserv02): #!/bin/sh if virsh -c qemu+ssh://kvmserv01/system list | grep -q " guest "; then echo "Saving state on remote server..." if ! virsh -c qemu+ssh://kvmserv01/system save guest --running ~/guest.save; then echo "Could not save state of guest" exit 1 fi echo "Setting remote drbd node to secondary..." if ! ssh root@kvmserv01 "drbdadm secondary guest"; then echo "Could not change remote host to secondary for guest's DRBD partition" exit 1 fi sleep 5 echo "Setting local drbd node to primary..." if ! drbdadm primary guest; then echo "Could not change this host to primary for guest's DRBD partition" exit 1 fi sleep 5 echo "Restoring state on local server..." if ! virsh restore ~/guest.save --running; then echo "Could not restore guest state" exit 1 fi echo "Deleting state file on local server..." rm -f ~/guest.save else echo 'guest not running on this host' fi # End of script While the state is restored and the guest comes up on the second server, I end up with filesystem corruptions. My first test guest had its file system pretty heavily damaged after a few moves back and forth. What am I missing here? Or is this just simply a really horrible way to do it? -- Aaron Clausen mightymartianca(a)gmail.com

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[libvirt-users] Libvirt and Glusterfs
by Olivier Mauras 07 Jul '13

07 Jul '13

Hi, I'm trying to use qemu native glusterfs integration with libvirt. It's all working well from the qemu side, but libvirt fails to start a domain with a gluster drive or attach a drive. I have exactly the same error as this person: https://www.redhat.com/archives/libvirt-users/2013-April/msg00204.html [1] I use qemu 1.5.1 with glusterfs 3.4 beta 4 and libvirt 1.0.6. [root@bbox ~]# virsh start test error: Failed to start domain test error: internal error process exited while connecting to monitor: char device redirected to /dev/pts/3 (label charserial0) qemu-system-x86_64: -drive file=gluster://127.0.0.1/vol0/test0.img,if=none,id=drive-virtio-disk1,format=raw: Gluster connection failed for server=127.0.0.1 port=0 volume=vol0 image=test0.img transport=tcp qemu-system-x86_64: -drive file=gluster://127.0.0.1/vol0/test0.img,if=none,id=drive-virtio-disk1,format=raw: could not open disk image gluster://127.0.0.1/vol0/test0.img: No data available Using this command to run qemu directly works like a charm: [root@bbox ~]# qemu-system-x86_64 -name test -machine pc-i440fx-1.5,accel=kvm,usb=off -m 8G -smp 1,maxcpus=4 -drive file=/pool/st01/test_1.img,if=none,id=drive-virtio-disk0,format=raw -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=gluster://127.0.0.1/vol0/test0.img,if=none,id=drive-virtio-disk1,format=raw -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk1,id=virtio-disk1 -vnc 127.0.0.1:0 -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -monitor stdio -qmp unix:/tmp/qmp-sock,server,nowait Image has been created using qemu-img. [root@bbox ~]# qemu-img info gluster://127.0.0.1/vol0/test0.img image: gluster://127.0.0.1/vol0/test0.img file format: raw virtual size: 10G (10737418240 bytes) disk size: 341K Everything is run as root, libvirtd daemon as well. Running libvirtd in debug mode doesn't seem to log more relevant informations than the virsh error. Has anyone been able to use glusterfs disks with livbirt ?? Any help appreciated, -O. Links: ------ [1] https://www.redhat.com/archives/libvirt-users/2013-April/msg00204.html

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[libvirt-users] libvirt & virtio_net - host.freeze@reset.domain
by poma 05 Jul '13

05 Jul '13

Hello people, libvirtd (libvirt) 1.0.5.2 virsh 1.0.5.2 virt-manager 0.10.0 Host: Linux localhost 3.9.8-300.fc19.x86_64 #1 SMP Thu Jun 27 19:24:23 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux Guest1: Linux localhost 3.9.8-300.fc19.i686.PAE #1 SMP Thu Jun 27 19:29:30 UTC 2013 i686 (none) Guest2: Linux localhost 3.9.8-300.fc19.x86_64 #1 SMP Thu Jun 27 19:24:23 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux Virtual NIC - source & model: macvtap/NAT/bridge & virtio(virtio_net) Host freeze at "virsh reset <domain>" or "virt-manager - Force Reset" Need kernel.sysrq or power reset. poma

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[libvirt-users] Libvirt, virtmanager & Windows 7 installation partition
by Roland Giesler 05 Jul '13

05 Jul '13

I need to use an existing windows 7 installation in a virtual machine form a libvirt host running Ubuntu 12.10. Windows 7 installs on two partitions. There a 100MB boot partitiona and then the main partition for the installation. If I boot the laptop (which dual boots), I can select Windows 7 and boot it just fine, or alternative Ubuntu. If I select /dev/sda1 in the virtmanager as the source path I can see dis activity, but in the VM window the "booting from hard disk..." text never does away. If I select /dev/sda2 (where the windows installation resides (and which is not marked as bootable), I get a boot failure right away. Here is what /var/log/syslog has: Jul 4 22:11:02 Matt-HP ntfs-3g[8385]: Version 2012.1.15AR.5 external FUSE 29 Jul 4 22:11:02 Matt-HP ntfs-3g[8385]: Mounted /dev/sda2 (Read-Write, label "", NTFS 3.1) Jul 4 22:11:02 Matt-HP ntfs-3g[8385]: Cmdline options: rw,nosuid,nodev,uhelper=udisks2,uid=1001,gid=1001,dmask=0077,fmask=0177 Jul 4 22:11:02 Matt-HP ntfs-3g[8385]: Mount options: rw,nosuid,nodev,uhelper=udisks2,allow_other,nonempty,relatime,default_permissions,fsname=/dev/sda2,blkdev,blksize=4096 Jul 4 22:11:02 Matt-HP ntfs-3g[8385]: Global ownership and permissions enforced, configuration type 7 Jul 4 22:11:02 Matt-HP udisksd[2569]: Mounted /dev/sda2 at /media/roland/BE26AE8326AE3C71 on behalf of uid 1001 Jul 4 22:12:31 Matt-HP kernel: [15366.356259] audit_printk_skb: 48 callbacks suppressed Jul 4 22:12:31 Matt-HP kernel: [15366.356265] type=1400 audit(1372968751.291:34): apparmor="STATUS" operation="profile_load" name="libvirt-c6a90ff5-9849-2ec5-fc8e-a331b144ceff" pid=8540 comm="apparmor_parser" Jul 4 22:12:31 Matt-HP kernel: [15366.584252] device vnet0 entered promiscuous mode Jul 4 22:12:31 Matt-HP kernel: [15366.588663] virbr0: topology change detected, propagating Jul 4 22:12:31 Matt-HP kernel: [15366.588669] virbr0: port 1(vnet0) entered forwarding state Jul 4 22:12:31 Matt-HP kernel: [15366.588685] virbr0: port 1(vnet0) entered forwarding state Jul 4 22:12:31 Matt-HP kernel: [15366.588963] IPv6: ADDRCONF(NETDEV_CHANGE): virbr0: link becomes ready Jul 4 22:12:31 Matt-HP NetworkManager[986]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/vnet0, iface: vnet0) Jul 4 22:12:31 Matt-HP NetworkManager[986]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/vnet0, iface: vnet0): no ifupdown configuration found. Jul 4 22:12:32 Matt-HP NetworkManager[986]: <warn> /sys/devices/virtual/net/vnet0: couldn't determine device driver; ignoring... Jul 4 22:12:33 Matt-HP avahi-daemon[935]: Joining mDNS multicast group on interface vnet0.IPv6 with address fe80::fc54:ff:fe8a:8f93. Jul 4 22:12:33 Matt-HP avahi-daemon[935]: New relevant interface vnet0.IPv6 for mDNS. Jul 4 22:12:33 Matt-HP avahi-daemon[935]: Registering new address record for fe80::fc54:ff:fe8a:8f93 on vnet0.*. Is there anything that I can learn from this log? What could I do to make this work. Dual booting it not an option in this case. regards Roland Giesler +27 (0)72-450-2817 http://www.giesler.za.net Disclaimer: The sender invokes the rule of "exemptus responsibilitus" pertaining to caffeine soluted inductions and/or decantations thereof into tactile communication interfaces and alternative apparatuses with respect to personal computation devices or otherwise implementations of electronic and/or bionic devices. This impartation is intended for the addressed party, unless conditions contrary to the aforementioned exist, in which case it is pertinent. Reduce without further ado to nothingness said impartation; alternatively "refrain from traversing the point of origination, be not enriched by 200 Randus and proceed without delay to enjailment".

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[libvirt-users] access remote libvirtd fail
by yd c 05 Jul '13

05 Jul '13

I want to manage remote libvirt , have run libvirtd in the dest host : [root@dest_host ~]# ps aux | grep libvirtd root 3293 0.0 0.1 923796 5856 ? Sl 12:59 0:00 libvirtd --daemon then I use the command in source host : 1. [root@source_host ~]# ssh -l root 211.87.***.97 ## login the dest host 2. [root@dest_host ~]# virsh -c qemu+ssh://127.0.0.1/system list --all # query vm status output: Id Name State ---------------------------------------------------- - ubuntu shut off - vdisk shut off also I use the command in source host 1. [root@source_host ~]# ssh -l root 211.87.***.97 ## login the dest host 2. [root@dest_host ~]# virsh -c qemu+ssh://211.87.***.97/system list --all ### query vm status output: Id Name State ---------------------------------------------------- - ubuntu shut off - vdisk shut off however , in the source host , execute the command : 1. [root@source_host ~]# virsh -c qemu+ssh://211.87.228.97/system list --all ### query vm status output: error: failed to connect to the hypervisor error: no valid connection error: End of file while reading data: : Input/output error I have referred to http://wiki.libvirt.org/page/Failed_to_connect_to_the_hypervisor#Other_erro… , http://wiki.libvirt.org/page/SSHSetup and http://wiki.libvirt.org/page/SSHPolicyKitSetup . All of them don't work. how should I do ? Help .

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[libvirt-users] best way to provide disk storage for vm without shared storage system
by Vasiliy Tolstov 04 Jul '13

04 Jul '13

Hello. I'm very happy with libvirt and qemu, that great software! (after some playing i want to create golang bindings to libvirt).. Now i provide ext4 fs for qcow2 images (raid1 with two sata disks). Now i don't need live migration (but may need it in feature). What is the best way to provide disks to vm in case of performance, ability to create backups (i don't want lvm snapshots)? As i search from google more speed can take physical storage - lvm. But may be QED or FVD can provide near lvm performance to me? -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

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[libvirt-users] F19 and virt-install
by Jay Vyas 03 Jul '13

03 Jul '13

Hi libvirt: -------- My "short" question is - is there a recipe for installing F19 100% automatically with static IPs? I'm using a combination of url based install with a kickstart script pasted to a gist in order to bootstrap the entire thing. It **used** to work (fedora16), but recently stopped. ------- Note : Right now Im not using the os-variant switch because fedora17+ arent listed as OS variant's in my version of virt-install. That in and of itself could be the problem -- any way to update virt-install's os-variant list? ------ With Fedora 16, I found that the url based install failed due to a corrupt rpm. I assume this is just because f16 isn't supported anymore so errors on the web site for it are not being fixed. With Fedora 18/19/... Im finding other types of errors related to missing downloaded components when the bootstrapping virt-install starts. In particular, a 404 (not found) error when fetching " product.img " from the OS url. Details below. <note, any insights into things I may be missing due to ignorance would also be appreciated here> -------- With Fedora 18: I've noticed that libvirt gives me some errors with the new generation of fedora formatted os's source directories. It looks for a file "product.img", which (I beleive) doesnt exist in fedora17+. In particular, it is looking for the "product.img" file, under http://redhat.download.fedoraproject.org/pub/fedora/linux/releases/19/Fedor… . virt-install --hvm --name f18x86_64a --ram 1024 --file /var/lib/libvirt/images/f18x86_64a.img,size=20 --location http://www.mirrorservice.org/sites/dl.fedoraproject.org/pub/fedora/linux/re… 20 -x "ks=<url_to_kickstart_file>" ------- Running "virt-install list", it seems that the only fedoras known to virt-install are up to fedora16: fedora16 : Fedora 16 fedora15 : Fedora 15 fedora14 : Fedora 14 fedora13 : Fedora 13 fedora12 : Fedora 12 fedora11 : Fedora 11 fedora10 : Fedora 10 fedora9 : Fedora 9 fedora8 : Fedora 8 fedora7 : Fedora 7 fedora6 : Fedora Core 6 fedora5 : Fedora Core 5 ------- Do I need to update virt-install in order to install F17+ from source? How is the os-variant used? Im assuming maybe os-variant needs to be updated somehow in order for the virt-install command to behave correctly. -- Jay Vyas http://jayunit100.blogspot.com

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[libvirt-users] VM destroy faiing in 1.0.1
by Chandrashekhar Jamadarkhani (cjamadar) 03 Jul '13

03 Jul '13

Hi, Virsh destroy is always failing with below error. [host:~]$ virsh destroy XYZ--2 error: Failed to destroy domain XYZ--2 error: Requested operation is not valid: domain is not running [host:~]$ virsh list --all Id Name State ---------------------------------------------------- - XYZ--2 shut off [host:~]$ host:~]$ libvirtd --version libvirtd (libvirt) 1.0.1 [host:~]$ host:~]$ virsh version Compiled against library: libvirt 1.0.1 Using library: libvirt 1.0.1 Using API: QEMU 1.0.1 Running hypervisor: QEMU 0.13.0 [host:~]$ same VM was working with older libvirt vrsion: [host:~]$ virsh version Compiled against library: libvir 0.8.7 Using library: libvir 0.8.7 Using API: QEMU 0.8.7 Running hypervisor: QEMU 0.13.0 [host:~]$ when we upgrade to latest libvirt version:1.0.1, VM destroy is failing. Appreciate your help on this. Thanks, Chandrashekhar

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[libvirt-users] fsck and guest images
by Jamie Fargen 03 Jul '13

03 Jul '13

Hey! I have some RHEL6 hypervisors and the VMs are in raw qemu image files in a local raid array linux raid + lvm + ext3. When a kernel update is installed a reboot is necessary, usually it has been more than 180 days since the last reboot and the file system is fsck'd and this takes 2-3 hours. I am curious to know if there is any documentation that addresses the pro's and con's of fsck'ing the volume containing /var/lib/libvirt/images. Could fsck make a change to the underlying file system that the guest images are stored on, which the guest operating system may not be able to handle when it runs its own file system maintenance, i.e. fsck or chkdsk. Is file system maintenance on the hypervisor volume storing the VM images redundant to the VM's own file system consistancy utilities. Regards, Jamie Ian Fargen

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Re: [libvirt-users] backup procedure using blockcopy
by Thomas Stein 03 Jul '13

03 Jul '13

> virsh dumpxml --security-info dom > dom.xml > virsh undefine dom Hello. Someone was talking about this (undefining the VM) would not be neccessary anymore when qemu-1.5 has been released. Is that true? > virsh blockcopy dom vda /path/to/backup-vda > polling loop - check periodically until 'virsh blockjob dom vda' > shows 100% completion > virsh suspend dom > virsh save dom /path/to/memory-backup --running This does not work for me. hn ~ # virsh blockjob gentoo-template vda Block Copy: [100 %] hn ~ # virsh save gentoo-template /opt/virt-backup-blockcopy/gentoo-template/gentoo-template-memory-backup --running error: Failed to save domain gentoo-template to /opt/virt-backup-blockcopy/gentoo-template/gentoo-template-memory-backup error: Requested operation is not valid: domain has an active block job Obviously i can not save while the blockjob is running. cheers t.

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