- Users - libvirt List Archives

[libvirt-users] Best practices on backingup/restore VMs
by Arthur Pemberton 08 Jun '10

08 Jun '10

I just moved from F11 to F13 and I'm find no information on the best way to restore VMs. I had just copied /var/lib/libvirt (with the VMs off) as part of my backup (I already backup all of /etc). But virt-manager doesn't allow creations of VMs without installing. Also, as a side note, the search feature on the website doesn't seem to allow me to search using documentation only. -- Fedora 13 (www.pembo13.com)

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[libvirt-users] Dual-boot and also use raw disk in virtual machine
by Richard Walker 07 Jun '10

07 Jun '10

I've got a new computer with two SATA disks. I installed a minimal Fedora 13 64-bit on the first disk. I shut down the computer, unplugged the first disk, booted up and installed Windows 7 on the second disk. Then I shut down, and plugged the first disk back in. I added a grub option to boot Windows from the second disk. All fine so far - I had a working dual boot system. Then in F13 using virt-manager I created a virtual machine using the second disk as a raw disk. Well, the only option I had (using virt-manager, at least) was to configure it as an IDE disk. Booting this virtual machine gets as far as "Starting Windows", and the animation appears (a dot or two), and then BSOD. Running the Windows diagnosis didn't help. I gave up. Then, keeping the same virtual machine configuration, I installed Windows 7 again into the virtual machine. I shut down the computer and booted from the second disk. Saw "Starting Windows", and the animation got a bit further, but got a BSOD again. Now running sfdisk -l /dev/sdb in the F13 host shows: Disk /dev/sdb: 121601 cylinders, 255 heads, 63 sectors/track Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0 Device Boot Start End #cyls #blocks Id System /dev/sdb1 * 0+ 12- 13- 102400 7 HPFS/NTFS start: (c,h,s) expected (0,32,33) found (2,0,33) end: (c,h,s) expected (12,223,19) found (205,3,19) /dev/sdb2 12+ 121601- 121589- 976657408 7 HPFS/NTFS start: (c,h,s) expected (12,223,20) found (205,3,20) end: (c,h,s) expected (1023,254,63) found (1023,15,63) /dev/sdb3 0 - 0 0 0 Empty /dev/sdb4 0 - 0 0 0 Empty So there is some obvious disagreement about the partition table. Am I going to be able to get this to work?

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[libvirt-users] host OS can't access internet but guest OS with bridge can
by scar 05 Jun '10

05 Jun '10

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 i have a desktop with ubuntu 9.04 on it... it needs to be updated but i can't access the internet since its last reboot. it has linux 2.6.28-18-generic on it, and libvirt 0.6.1-0ubuntu5.1. i setup libvirt for bridging, and a guest OS i have running can access the internet fine. when i try to ping someplace from the host, it can resolve the hostname but i get "Destination Host Unreachable" errors. it uses the router for DNS, and i can access the router and other local computers fine. $ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 br0 192.168.1.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0 192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 br0 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0 0.0.0.0 192.168.1.1 0.0.0.0 UG 100 0 0 br0 $ -----BEGIN PGP SIGNATURE----- iEYEAREIAAYFAkwKkZMACgkQXhfCJNu98qCt3wCffrY0VvAL0eA+uoVjHOIgnBax 5isAoPJTwxX/KLSOxA9UZDwO6a4ALkLx =LE+h -----END PGP SIGNATURE-----

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[libvirt-users] libvirt with opennebula
by marwen marwen 03 Jun '10

03 Jun '10

hello I'm currently using libvirt and opennebula. I have installed the libvirt with the driver of opennebule "ONE" and I test the installation. /********************************************************/ oneadmin@node016 ~]$ virsh -c one:/// Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # list Id Name State ---------------------------------- virsh # /********************************************************/ but I can not see the list of machines that run in the cluster node (Xen and KVM) I want to know if this is a problem of configuration files ( libvirtd.conf and oned.conf). can you help me to overcome this problem thank you

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[libvirt-users] Virsh blkstat doesn't work on Xen HVM
by 張文哲 03 Jun '10

03 Jun '10

Hi I tried to use virsh blkstat to get information of a block, but it returns an error message as shown below This function works fine in KVM, but fail in XEN. I tried XEN 3.4.3 ,4.0.0 and 4.0.1 with libvirt 0.7.1 from fedora yum server and 0.8.1 from libvirt . All of them are fail to get the block status. The following is the config file and error message of virsh domblkstat. Any one knows how to make this function work? [root@localhost ~]# virsh dumpxml vm1 <domain type='xen' id='1'> <name>vm1</name> <uuid>12af1ed4-2f2d-f02d-9a2a-5d4f377889d5</uuid> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu>1</vcpu> <os> <type>hvm</type> <loader>/usr/lib/xen/boot/hvmloader</loader> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/lib64/xen/bin/qemu-dm</emulator> <disk type='file' device='disk'> <driver name='file'/> <source file='/var/lib/libvirt/images/vm1.img'/> <target dev='hda' bus='ide'/> </disk> <disk type='file' device='cdrom'> <target dev='hdc' bus='ide'/> <readonly/> </disk> <interface type='bridge'> <mac address='00:16:36:0f:fb:7a'/> <source bridge='eth0'/> <script path='/etc/xen/scripts/vif-bridge'/> <target dev='vif1.0'/> </interface> <serial type='pty'> <source path='/dev/pts/0'/> <target port='0'/> </serial> <console type='pty' tty='/dev/pts/0'> <source path='/dev/pts/0'/> <target port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' keymap='en-us'/> <sound model='es1370'/> </devices> </domain> [root@localhost ~]# virsh domblkstat vm1 hda error: Failed to get block stats vm1 hda error: internal error read_bd_stats: Failed to read any block statistics

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[libvirt-users] PCI Passthrough
by Jonathan Tripathy 03 Jun '10

03 Jun '10

Hi Everyone, When I try and assign a physical device to a guest using virt-manager, libvirt throws an error: "Failed to create inactive domain" I'm using libvirt 0.8.1 which I compiled myself, along with Xen 4.0 on Ubuntu 10.04 Dom0 I'm also using virt-manager 0.8.4 which I compiled myself. Any help would be appreciated Thanks

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[libvirt-users] Virsh blkstat doesn't work on Xen HVM
by wenche_chang＠trend.com.tw 03 Jun '10

03 Jun '10

Hi I tried to use virsh blkstat to get information of a block, but it returns an error message as shown below This function works fine in KVM, but fail in XEN. I tried XEN 3.4.3 ,4.0.0 and 4.0.1 with libvirt 0.7.1 from fedora yum server and 0.8.1 from libvirt . All of them are fail to get the block status. The following is the config file and error message of virsh domblkstat. Any one knows how to make this function work? [root@localhost ~]# virsh dumpxml vm1 <domain type='xen' id='1'> <name>vm1</name> <uuid>12af1ed4-2f2d-f02d-9a2a-5d4f377889d5</uuid> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu>1</vcpu> <os> <type>hvm</type> <loader>/usr/lib/xen/boot/hvmloader</loader> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/lib64/xen/bin/qemu-dm</emulator> <disk type='file' device='disk'> <driver name='file'/> <source file='/var/lib/libvirt/images/vm1.img'/> <target dev='hda' bus='ide'/> </disk> <disk type='file' device='cdrom'> <target dev='hdc' bus='ide'/> <readonly/> </disk> <interface type='bridge'> <mac address='00:16:36:0f:fb:7a'/> <source bridge='eth0'/> <script path='/etc/xen/scripts/vif-bridge'/> <target dev='vif1.0'/> </interface> <serial type='pty'> <source path='/dev/pts/0'/> <target port='0'/> </serial> <console type='pty' tty='/dev/pts/0'> <source path='/dev/pts/0'/> <target port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' keymap='en-us'/> <sound model='es1370'/> </devices> </domain> [root@localhost ~]# virsh domblkstat vm1 hda error: Failed to get block stats vm1 hda error: internal error read_bd_stats: Failed to read any block statistics TREND MICRO EMAIL NOTICE The information contained in this email and any attachments is confidential and may be subject to copyright or other intellectual property protection. If you are not the intended recipient, you are not authorized to use or disclose this information, and we request that you notify us by reply mail or telephone and delete the original message from your mail system. TREND MICRO EMAIL NOTICE The information contained in this email and any attachments is confidential and may be subject to copyright or other intellectual property protection. If you are not the intended recipient, you are not authorized to use or disclose this information, and we request that you notify us by reply mail or telephone and delete the original message from your mail system.

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[libvirt-users] JSON support
by Camilo Aguilar 02 Jun '10

02 Jun '10

Are there any efforts to support JSON in libvirt ?

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[libvirt-users] Working example of logical storage pool and volume creation?
by Justin Clift 02 Jun '10

02 Jun '10

Hi all, Does anyone have a working example of creation of a logical storage pool and volume? I'm hitting a wall getting logical volumes to work on RHEL 6 beta. There's a single drive I'm trying to setup (sdc) as a libvirt managed logical storage pool, but all volume creation on it fails. Here's what I'm finding so far: Prior to any storage pool work, only the host boot drive (sda) is in lvm. # vgs VG #PV #LV #SN Attr VSize VFree vg_host2 1 3 0 wz--n- 465.27g 0 # pvs PV VG Fmt Attr PSize PFree /dev/sda2 vg_host2 lvm2 a- 465.27g 0 # ls -la /dev/mapper total 0 drwxr-xr-x. 2 root root 120 Jun 1 03:12 . drwxrwxrwt. 21 root root 3920 Jun 1 03:12 .. crw-rw----. 1 root root 10, 58 May 31 14:08 control lrwxrwxrwx. 1 root root 7 May 31 14:10 vg_host2-lv_home -> ../dm-7 lrwxrwxrwx. 1 root root 7 May 31 14:08 vg_host2-lv_root -> ../dm-0 lrwxrwxrwx. 1 root root 7 May 31 14:10 vg_host2-lv_swap -> ../dm-8 # Creation of a logical storage pool, using sdc: # virsh pool-define-as guest_images_lvm logical - - /dev/sdc libvirt_lvm /dev/mapper Pool guest_images_lvm defined # virsh pool-info guest_images_lvm Name: guest_images_lvm UUID: 17398035-8000-7252-ab25-58db95aed130 State: inactive # virsh pool-build guest_images_lvm Pool guest_images_lvm built # The physical device and volume group are seen in lvm: # pvs PV VG Fmt Attr PSize PFree /dev/sda2 vg_host2 lvm2 a- 465.27g 0 /dev/sdc libvirt_lvm lvm2 a- 465.76g 465.76g # vgs VG #PV #LV #SN Attr VSize VFree libvirt_lvm 1 0 0 wz--n- 465.76g 465.76g vg_host2 1 3 0 wz--n- 465.27g 0 # Starting the logical pool works: # virsh pool-start guest_images_lvm Pool guest_images_lvm started # Creation of volumes fail: # virsh vol-create-as guest_images_lvm volume1 8G error: Failed to create vol volume1 error: internal error '/sbin/lvcreate --name volume1 -L 8388608K /dev/mapper' exited with non-zero status 3 and signal 0: Volume group name expected (no slash) Run `lvcreate --help' for more information. # So, it looked like "/dev/mapper" in the pool-define-as command should have instead been the LVM volume group again. That doesn't work either though: # virsh pool-define-as guest_images_lvm logical - - /dev/sdc libvirt_lvm libvirt_lvm Pool guest_images_lvm defined # virsh pool-build guest_images_lvm Pool guest_images_lvm built # virsh pool-start guest_images_lvm Pool guest_images_lvm started # virsh vol-create-as guest_images_lvm volume1 8G error: Failed to create vol volume1 error: cannot read path 'libvirt_lvm/volume1': No such file or directory Looking in the libvirtd logs for this last attempt, the volume was actually successfully created. But libvirtd then checks for it's presence (wrongly!), doesn't find it, and then lvremove's it: 03:01:24.000: debug : virRunWithHook:832 : /sbin/lvcreate --name volume1 -L 8388608K libvirt_lvm ... 03:01:24.223: debug : virRunWithHook:848 : Command stdout: Logical volume "volume1" created ... 03:01:24.223: error : virStorageBackendLogicalCreateVol:616 : cannot read path 'libvirt_lvm/volume1': No such file or directory ... 03:01:24.223: debug : virRunWithHook:832 : /sbin/lvremove -f libvirt_lvm/volume1 Guessing I'm either doing something wrong, or hitting bugs, or ? Anyone have ideas/suggestions/etc? Regards and best wishes, Justin Clift -- Salasaga - Open Source eLearning IDE http://www.salasaga.org

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[libvirt-users] Mount options for fs type storage pools?
by Justin Clift 02 Jun '10

02 Jun '10

Hi all, Presently writing up "Storage Pool" docs for the Fedora Virtualisation Guide. (using both virsh and virt-manager) Having trouble finding out how to specify mount options for fs type storage pools. For example: # virsh pool-define-as guest_images_fs fs - - /dev/sdc1 - "/guest_images" Pool guest_images_fs defined # virsh pool-build guest_images_fs Pool guest_images_fs built # virsh pool-start guest_images_fs Pool guest_images_fs started # mount | grep guest_images /dev/sdc1 on /guest_images type ext4 (rw) # Notice that /guest_images is mounted with default options. Nothing wrong with that, but lets say the SysAdmin has a need to pass specific mount options. (ie journal_checksum, or noatime, or nodiratime, etc) Checked the virStorageBackendFileSystemMount() function in present git master, and it doesn't look like mount options are considered for anything other than Gluster? How to do it, or is it best to not use libvirt to manage the mounting of this type of storage when options are needed? Regards and best wishes, Justin Clift -- Salasaga - Open Source eLearning IDE http://www.salasaga.org

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