- Users - libvirt List Archives

[libvirt-users] Error: virNetSocketReadWire:904 : Cannot recv data: Input/output error
by Adarsh Guler 14 Aug '12

14 Aug '12

Hi, When am trying to send q job query using HTTP, am getting the error as indicated in the subject line. can some one help to resolve this error? Regards, Adarsh

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[libvirt-users] How to use ext transport?
by Christian Schmidt 14 Aug '12

14 Aug '12

Hi, I would like to use the ext transport mode to migrate VMs between two hosts, but I didn't find any documentation about the ext interface. I have successfully migrate a vm with a programm that passes it's incomming messages through the network to libvirts socket on the target server. But the external program on the source side didn't get the connection URI or the server address or port. Is is possible to pass some arguments to the external programm or how can the external programm get the connection URI? My migration command looks like: virsh migrate --live --verbose myvm qemu+ext://targethost:7866/system?command=/root/dev/bin/trans At the moment I've written the target host and the port in the transport programm, but I think there have to be a better solution... -- Christian

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[libvirt-users] Which functions call qemu_driver API?
by He Xin 14 Aug '12

14 Aug '12

Hi, Excuse me, I have watched qemu_driver.c where most of the libvirt API is overrided in order to connect qemu. But I am confused which functions then call those qemu_driver API? I mean where is the qemu_driver implementation? Libvirt.c? But how does the qemu_driver connect and control qemu? Thanks a lot! Regards, Corey

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[libvirt-users] Does Libvirt-0.8.8(windows) support URI like qemu+ssh on windows?
by xuanmao_001 14 Aug '12

14 Aug '12

Hi, Eric: I have ssh2.exe and ssh-keygen2 tools on my windows which as parts of "SSH Secure Shell for Workstations Windows Client", and they work well. Now I want to know if libvirt support URI like qemu+ssh on windows? Give me some ideas. thanks xuanmao_001

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[libvirt-users] quickest way to stop VM
by Harish Patil 14 Aug '12

14 Aug '12

Hello Which is the quickest way to stop KVM guest VM. I am not interested in saving anything; I just have to make sure that VM apps are ended quickly. i) virsh shutdown ii) virsh suspend iii) virsh destroy >From little descriptions I have, looks like destroy is the fastest way and acts like a removal of a power plug. Pls let me know. Thanks >Harish

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[libvirt-users] iptables: cannot port forward
by Mauricio Tavares 14 Aug '12

14 Aug '12

Easy question here: I have a test network that looks like this (apologies for my lack of ascii skills): [hostc]---------------[Firewall]192.168.42.1 (EXTIF: eth0) /10.0.0.1 (INTIF: eth1) 192.168.42.10 (wan) |(lan) | +-------------[hosta] 10.0.0.10 (port 4242) | +-------------[hostb] 10.0.0.20 (port 2424) All of those machines are vms I created using virsh/libvirt. In fact, the "wan" is a network that exists only inside virsh. "lan" is a vlan my desktop also belongs to; I did that so I could always connect even when I screwed the firewall up. So, using iptables I created a little set of rules to forward port 2424 in 192.168.42.1 to 10.0.0.20:2424 : $IPTABLES -A FORWARD -o $INTIF -i $EXTIF -j ACCEPT $IPTABLES -t nat -A PREROUTING --dst 192.168.42.1 -p tcp --dport 2424 -m comment --comment "test" -j DNAT --to-destination 10.0.0.20:2424 cat >> /etc/sysctl.conf << 'EOF' # Custom Settings for Forwarding and OpenSwan net.ipv4.ip_forward=1 net.ipv4.conf.all.accept_redirects = 0 net.ipv4.conf.default.accept_redirects = 0 net.ipv4.conf.all.send_redirects = 0 net.ipv4.conf.default.send_redirects = 0 EOF sysctl -p So, in 10.0.0.20 I do "nc -l 2424". But when I go to hostc and then try to do "nc -v 192.168.41.1 2424", connection does not take place. Thinking I've done something wrong, I replicated the very same setup in virtualbox down to the network layout. It works. So, I went to the firewall vm and replaced the network interface from virtio to e1000. Still did not work. What am I missing here?

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[libvirt-users] How much ways can libvirt connect to a qemu instance?
by 何鑫 13 Aug '12

13 Aug '12

Hi, Could you give me some advices about how to connect libvirt to a Qemu instance?

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[libvirt-users] Does Libvirt-0.8.8(windows) support URI like qemu+ssh on windows?
by xuanmao_001 13 Aug '12

13 Aug '12

Hi, I have ssh2.exe and ssh-keygen2 tools on my windows which as parts of "SSH Secure Shell for Workstations Windows Client", and they work well. Now I want to know if libvirt support URI like qemu+ssh on windows? Give me some ideas. thanks xuanmao_001

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[libvirt-users] virsh dump
by Harish Patil 11 Aug '12

11 Aug '12

Hi I have both host and KVM/QEMU guest VM running linux. Questions: What are the constituents of the virsh dump? - What all areas does it dumps? - Is it same as taking guest VM's core dump via kexec/kdump? - Does it include QEMU's info to debug qemu-level issues? Thanks much in advance. >harish

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[libvirt-users] virDomainMigrate() leads to SASL error
by Olivier Doucet 10 Aug '12

10 Aug '12

Hello, I'm trying to use virDomainMigrate() function through libvirt-php but I have this error coming from libvirt (this is an error raised by virDomainMigrate(), not by php binding) : Failed to step SASL negotiation: -7 (SASL(-7): invalid parameter supplied: Unexpectedly missing a prompt result) My two connections are over TCP with login/password provided (URL is qemu+tcp://X.X.X.X/system) Connection to both hosts independently is working (listing domains, etc.) Migration through virsh is working too ! On destination host, I have this in log file : 2012-08-09 14:29:23.628+0000: 17179: error : virNetSocketReadWire:1003 : End of file while reading data: Input/output error Can someone tell me if I'm doing anything wrong ? Thanks ! Olivier

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[libvirt-users] error deploying a vm: Operation not permitted
by Michael Rebstock 10 Aug '12

10 Aug '12

Dear Ladies and Gentleman, I am trying to deploy a virtual machine on a KVM host. I created a deployment file (see beneath) and a disk for this VM. As root I executed the following command: virsh create deployment.0 but then I get the following error message: error: Failed to create domain from deployment.0 error: cannot set ownership on /var/lib/one/datastores/0/15/disk.0: Operation not permitted What am I doing wrong? Thanks in advance. Best regards Michael Rebstock ######################### Content of the deployment file: <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> <name>one-15</name> <memory>2097152</memory> <os> <type arch='i686'>hvm</type> <boot dev='hd'/> </os> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/one/datastores/0/15/disk.0'/> <target dev='hda' bus='ide'/> <driver name='qemu' type='raw' cache='default'/> </disk> <interface type='bridge'> <source bridge='319er-vlan'/> <mac address='22:00:c0:ba:2a:64'/> </interface> </devices> <features> <acpi/> </features> </domain>

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[libvirt-users] libvirtd may need to be started: Permission denied
by 何鑫 10 Aug '12

10 Aug '12

Hi, I try to configure libvirtd to use qemu+tcp, but after doing so, I can't use virsh or programs with libvirt API. I type "virsh -c qemu:///system", then error: unable to connect to '/var/run/libvirt/libvirt-sock', libvirtd may need to be started: Permission deniederror: failed to connect to the hypervisor I could add "sudo" to "virsh -c qemu:///system", running virsh with "qemu:///system" normally, but it's not suitable for my requests. Also I try to restart or reinstall libvirt-bin in Ubuntu, also failed. Could you give me some idea? Thanks a lot! RegardsCorey

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[libvirt-users] Remote Shutdown of Server 2008
by Gutierrez-Robles, Frank 10 Aug '12

10 Aug '12

Good afternoon, I have a VM of Microsoft Server 2008 SP1. I am using virsh commands to power it on/off. I can power on/off when the admin is logged in to the Server VM, and when there are no users logged in, but when the admin locks the screen, I cannot seem to power it off. The virsh command states that the domain is being shutdown, but it in fact does not. I looked at some registry settings for the VM (server 2008) and see if I can pinpoint an entry I need to set, but had no luck. Any ideas? Thank you for your support. - Frank G.

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[libvirt-users] [libvirt] virDomainMemoryStats call
by Parakkal, Navin S 09 Aug '12

09 Aug '12

Hi, Is the array mstats returned by virDomainMemoryStats call cummulative or snapshot of the counter at that particular time ? I was of the opinion that is cummulative like the /proc counters but this counter seems to go backwards ie next snapshot value is less than the current one which makes me think these are snapshot values . I'm using RHEL 6.3 libvirt version 0.9.10. Regards, Navin

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[libvirt-users] migration with non-root user
by Yih Chuang 09 Aug '12

09 Aug '12

Hi, I had a VM running on c3rh2 under 'vmc' user: [vmc@c3rh2 .ssh]$ virsh list --all Id Name State ---------------------------------------------------- 1 vs2relocate_nonRoot running After the virsh migration command, "virsh migrate --live --unsafe vs2relocate_nonRoot qemu+ssh://vmc@c3rh1.kirkland.ibm.com/session", this VM successfully got migrated to the target host c3rh1. However, it was not visible to 'vmc' user but 'root'. [vmc@c3rh1 .ssh]$ virsh list --all Id Name State ---------------------------------------------------- [vmc@c3rh1 .ssh]$ sudo virsh list --all Id Name State ---------------------------------------------------- 1 vs2relocate_nonRoot running * The libvirt version is libvirt-0.9.10-21.el6_3.1.x86_64 on both hosts. Anything I may have missied? Thanks, --Yih

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[libvirt-users] How the libvirtd connect to qemud in source codes?
by 何鑫 08 Aug '12

08 Aug '12

Hi, I meet a question when reading the libvirt source codes. Could you help me? Coz I plan to link libvirt to a Android Emulator based on QEMU, knowing how the libvirtd connect to qemud is important. I trace the code as following: libvirtd.c contains all the initilization of libvirt daemon, then calling function named qemuRegister to qemu_driver.c which contains three methods:int qemuRegister(void) { virRegisterDriver(&qemuDriver); virRegisterStateDriver(&qemuStateDriver); virNWFilterRegisterCallbackDriver(&qemuCallbackDriver); return 0; } In qemuDriver, I find a function --qemudOpen which, I guess, contains the method what I want. But I failed to find right messages. Could you please give me some tips? I guess there has got to contain related interfaces to connect between libvirt and qemu. Thanks a lot!

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[libvirt-users] Bug in VNC QEMU?
by Nikita A Menkovich 08 Aug '12

08 Aug '12

Hi all! Recently I found some problems after upgrading one of our virtual machines from ubuntu 10.10. to later releases. Root problem is inactive VNC terminal after booting grub. It happens because of using framebuffer at boot process. To fix this problem you should change at /etc/default/grub: GRUB_TERMINAL=console And run # update-grub # reboot This fixes problem. But I think there should be some fix to use fb in vnc without problems. I use: libvirt 0.9.11.3 QEMU emulator version 1.0 (qemu-kvm-1.0 Debian 1.0+dfsg-8~bpo60+1), Copyright (c) 2003-2008 Fabrice Bellard <graphics type='vnc' port='PORT' autoport='no' listen='IP'> <listen type='address' address='IP'/> </graphics> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> -- Nikita A Menkovich http://libc6.org/ JID: menkovich(a)gmail.com

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[libvirt-users] Channel with virtio problem
by norazah aziz 08 Aug '12

08 Aug '12

I have configured the kvm and edit the xml as below, however there are an error when I want to run the guest. The error as follows: virsh create libvirt.xml error: Failed to create domain from libvirt-test.xml error: XML description for unknown target type for character device: virtio is not well formed or invalid Please help me to solve this problem. ############################################################ <domain type='kvm'> <name>i-5E36098H</name> <os> <type>hvm</type> <kernel>/opt/eucalyptus-data/suria/i-5E36098H/kernel</kernel> <initrd>/opt/eucalyptus-data/suria/i-5E36098H/ramdisk</initrd> <cmdline>root=LABEL=root console=ttyS0</cmdline> </os> <features> <acpi/> </features> <memory>13107200</memory> <vcpu>1</vcpu> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file'> <source file='/opt/eucalyptus-data/suria/i-5E36098H/disk'/> <target dev='vda' bus='virtio'/> </disk> <interface type='network'> <source network='default'/> <mac address='d0:0d:45:D2:08:01'/> <model type='virtio'/> </interface> <controller type='ide' index='0'/> <controller type='virtio-serial' index='0' ports='16' vectors='4'/> <controller type='virtio-serial' index='1'> <address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/> </controller> <parallel type='pty'> <source path='/dev/pts/2'/> <target port='0'/> </parallel> <serial type='pty'> <source path='/dev/pts/3'/>  <target type='virtio' port='0'/> </serial> <console type='pty'> <source path='/dev/pts/4'/> <target type='virtio' port='0'/> </console> <channel type='pty'> <source mode='bind' path='/var/lib/libvirt/qemu/va-i5E36098H-virtio.sock'/> <target type='virtio' name='org.qemu.guest_agent.0'/> <address type='virtio-serial' controller='0' bus='0' port='0'/> </channel> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us'/> </devices> ########################################################################

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[libvirt-users] Authentication via SASL and LDAP?
by Andrew Martin 07 Aug '12

07 Aug '12

Hello, I've recently configured a new virtual machine host running Ubuntu 12.04 server with libvirt and KVM. I am configuring WebVirtMgr ( https://github.com/retspen/webvirtmgr/ ) for users to manage machines via a web interface. This requires access to the host using qemu+tcp, which I have configured as follows: /etc/default/libvirt-bin: start_libvirtd="yes" libvirtd_opts="-d -l" /etc/libvirt/libvirtd.conf: listen_tls = 0 listen_tcp = 1 unix_sock_group = "libvirtd" unix_sock_rw_perms = "0770" auth_unix_ro = "none" auth_unix_rw = "none" auth_tcp = "sasl" The libvirt documentation ( http://libvirt.org/auth.html ) does not specify if it is possible to use SASL with a different authentication method other than DIGEST-MD5. I would like to authenticate users via LDAP - is this possible? I configured LDAP authentication via SASL as follows: /etc/sasl2/libvirt.conf pwcheck_method: saslauthd mech_list: PLAIN LOGIN log_level: 5 saslauthd_path: /var/run/saslauthd/mux auxprop_plugin: ldap /etc/saslauthd.conf ldap_servers: ldap://ldap_ip_addr:389/ ldap_search_base: ou=People,dc=x-es,dc=com ldap_auth_method: none ldap_filter: uid=%u ldap_version: 3 /etc/default/saslauthd START=yes DESC="SASL Authentication Daemon" NAME="saslauthd" MECHANISMS="ldap" MECH_OPTIONS="" THREADS=5 OPTIONS="-O /etc/saslauthd.conf -c -m /var/run/saslauthd -r" Testing the configuration works: # testsaslauthd -u myuser -p mypass 0: OK "Success." However, if I attempt to connect over the libvirt TCP connection I am denied: virsh -c qemu+tcp://my_vm_host/system nodeinfo error: authentication failed: Failed to start SASL negotiation: -4 (SASL(-4): no mechanism available: ) error: failed to connect to the hypervisor Do you know what is incorrect in my libvirt config, or is it not possible to authenticate libvirt via SASL+LDAP? If not, is there somewhere that documents all of the supported mechanisms? Thanks, Andrew Martin

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[libvirt-users] using RBD with libvirt 0.9.13
by Jeff Strunk 06 Aug '12

06 Aug '12

I'm having some trouble creating KVM domains with RBD block devices using virsh. I've managed to get virsh to define the domain, but it gives an error when trying to start the domain: error: Failed to start domain test0 error: internal error process exited while connecting to monitor: char device redirected to /dev/pts/3 kvm: -drive file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw: error connecting kvm: -drive file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw: could not open disk image rbd:rbd/test0: No such file or directory >From libvirt's QEMU log: 2012-08-06 18:36:57.788+0000: starting up LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/kvm -name test0 -S -M pc-1.0 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -uuid 3e727624-f336-d674-4e0c-234641fc9987 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/test0.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=rbd:rbd/test0,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 if=none,id=drive-ide0-1-0,readonly=on,format=raw -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=19,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:8c:e4:92,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -vnc 127.0.0.1:0 -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 Domain id=5 is tainted: high-privileges char device redirected to /dev/pts/2 kvm: -drive file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw: error connecting kvm: -drive file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw: could not open disk image rbd:rbd/test0: No such file or directory 2012-08-06 18:36:58.353+0000: shutting down I can, however, successfully run a KVM virtual machine with an RBD block device with the following command: kvm -drive file=rbd:rbd/test1,id=drive-virtio-disk0,format=raw -cdrom /var/lib/libvirt/images/ubuntu-12.04-server-amd64.iso kvm will boot with the "-drive file=rbd:rbd/test0,if=none,id=drive-virtio-disk0,format=raw" options, but the disk is not detected unless "if=none" is removed. Has anyone else figured this out? Thank you, Jeff Here is my rbd pool definition: ######### BEGIN <pool type="rbd"> <name>rbd</name> <source> <name>rbd</name> <host name='thinkmate3' port='6789'/> <host name='thinkmate4' port='6789'/> <auth username='admin' type='ceph'> <secret uuid='f0836fcb-9c05-5ccf-653a-eb1d0308e247'/> </auth> </source> </pool> ######### END My rbd volumes: # virsh vol-list rbd Name Path ----------------------------------------- test0 rbd/test0 test1 rbd/test1 test2 rbd/test2 Here is my domain definition: ######### BEGIN <domain type='kvm'> <name>test0</name> <uuid>3e727624-f336-d674-4e0c-234641fc9987</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <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/bin/kvm</emulator> <disk type='network' device='disk'> <driver name='qemu' type='raw'/> <source protocol='rbd' name='rbd/test0'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='usb' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <interface type='network'> <mac address='52:54:00:8c:e4:92'/> <source network='default'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='-1' autoport='yes'/> <video> <model type='cirrus' vram='9216' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain> ######## END

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[libvirt-users] Opteron_G4 CPU under libvirt 0.9.12
by Michael Beham 06 Aug '12

06 Aug '12

Hi, I´m using libvirt version 0.9.12 under Debian Squeeze with and AMD Opteron 4280. Executing the virsh capabilities command only show me the following flags: <cpu> <arch>x86_64</arch> <model>Opteron_G4</model> <vendor>AMD</vendor> <topology sockets='1' cores='8' threads='2'/> <feature name='nodeid_msr'/> <feature name='wdt'/> <feature name='skinit'/> <feature name='ibs'/> <feature name='osvw'/> <feature name='cr8legacy'/> <feature name='extapic'/> <feature name='cmp_legacy'/> <feature name='fxsr_opt'/> <feature name='mmxext'/> <feature name='osxsave'/> <feature name='monitor'/> <feature name='ht'/> <feature name='vme'/> </cpu> Should not there be more flags supported by the CPU, for example the SVM-Flag for virtualization because executing cat /proc/cpuinfo gives me quite a lot of more flags and also the SVM Flag. Cheers, Mike

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[libvirt-users] CPU Flags libvirt 0.9.12
by Michael Beham 04 Aug '12

04 Aug '12

Hi, I?m using libvirt version 0.9.12 under Debian Squeeze with and AMD Opteron 4280. Executing the virsh capabilities command only show me the following flags: <cpu> <arch>x86_64</arch> <model>Opteron_G4</model> <vendor>AMD</vendor> <topology sockets='1' cores='8' threads='2'/> <feature name='nodeid_msr'/> <feature name='wdt'/> <feature name='skinit'/> <feature name='ibs'/> <feature name='osvw'/> <feature name='cr8legacy'/> <feature name='extapic'/> <feature name='cmp_legacy'/> <feature name='fxsr_opt'/> <feature name='mmxext'/> <feature name='osxsave'/> <feature name='monitor'/> <feature name='ht'/> <feature name='vme'/> </cpu> Should not there be more flags supported by the CPU, for example the SVM-Flag for virtualization because executing cat /proc/cpuinfo gives me quite a lot of more flags and also the SVM Flag. Cheers, Mike

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[libvirt-users] Determine state of the guest OS/kernel from host
by Harish Patil 03 Aug '12

03 Aug '12

Hello, Is there a way to determine state of the qemu/kvm guest OS (rebooting/working/hung etc) from the host. I'm not referring to the qemu domain state itself Thanks in advance. >harish

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[libvirt-users] Unable to load library 'virt'
by zhijun liu 03 Aug '12

03 Aug '12

Hi,all now ,an old problem I really cann't resolved ,in my window7(64bit) use libvirt-0.4.7.jar to conn server System.setProperty("jna.library.path", "D:/Program Files/Libvirt/bin"); conn = new Connect("qemu+tcp://192.168.1.106/system",true); the exception is Exception in thread "main" java.lang.UnsatisfiedLinkError: Unable to load library 'virt': ÕҲ»µ½ָ¶¨ PS:in cmd line i want to connect sever is no problem ,like this: virsh -c qemu+tcp://192.168.1.106/system, it's ok thanks in advance!!!

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Re: [libvirt-users] Excluding RAW disk from snapshot
by Trey Dockendorf 03 Aug '12

03 Aug '12

On Thu, Aug 2, 2012 at 11:58 AM, Eric Blake <eblake(a)redhat.com> wrote: > On 08/02/2012 10:53 AM, Trey Dockendorf wrote: > > Did you mean for this to go to the list? Others might benefit from the > answer. > >>>> >>>> <domainsnapshot> >>>> <name>20120802</name> >>>> <description>oVirt 3.1 upgrade</description> >>>> <disks> >>>> <disk name='vda' snapshot='yes' /> >>>> <disk name='vdb' snapshot='no' /> >>>> </disks> >>>> </domainsnapshot> >>>> >>>> When I try the snapshot I get this error... >>>> > >> Here's the new XML >> >> <domainsnapshot> >> <name>20120802</name> >> <description>oVirt 3.1 upgrade</description> >> <disks> >> <disk name='vdb' snapshot='no' /> >> </disks> >> </domainsnapshot> >> > > Ah, right - snapshot is a tri-state: 'no', 'internal', and 'external', > so 'yes' is not a valid state (although currently only 2 of the 3 states > are supported for qemu: 'no' and 'external'). > >> Now I get this error >> >> >> # virsh snapshot-create --disk-only dc-vmarchitect dc-vmarchitect_ss.xml >> error: operation failed: Failed to take snapshot: unknown command: >> 'snapshot_blkdev' > > That's a sign of your qemu being too old to support disk snapshots > (older qemu only supports system checkpoint internal snapshots). > >> >> I do not know if this could be an issue, but after this wasn't working >> with libvirt-0.9.4, I did "yum update qemu-img qemu-kvm libvirt" and >> am now at the versions listed in previous email. I did not do a full >> system upgrade or reboot as this is a heavily loaded production >> system. Is this the case where the VM is running as the previous >> version of qemu-kvm ? >> >> Thanks >> - Trey >> > > -- > Eric Blake eblake(a)redhat.com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org > Replying back to list, accidently missed reply-all. Could it be the case that since I upgraded libvirt and qemu while all the VMs were running, that the VM has to be restarted to take on the updated version's capability? If this isn't something yet supported in EL6.3, which I hope it is, is there any other way to perform a snapshot and exclude a disk aside from temporarily detaching it from the VM? Thanks - Trey

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