June 2012 - Users - libvirt List Archives

[libvirt-users] some problem with snapshot by libvirt
by xingxing gao 21 Nov '14

21 Nov '14

Hi,all,i am using libvirt to manage my vm,in these days i am testing the libvirt snapshot ,but meet some problem: the snapshot was created from this command: snapshot-create-as win7 --disk-only --diskspec vda,snapshot=external --diskspec hda,snapshot=no but when i tried to revert from the snapshot which created from the above command ,i got error below: virsh # snapshot-revert win7 1338041515 --force error: unsupported configuration: revert to external disk snapshot not supported yet version: virsh # version Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 1.0.93

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[libvirt-users] virsh list not working with xen 4
by Rogério Vinhal Nunes 21 Sep '12

21 Sep '12

Hi, I'm having some trouble to get libvirt to show the correct power state of my virtual machines. I'm using Ubuntu 10.04 + Xen 4.1.1 + libvirt 0.8.8. virsh list --all only shows turned off machines registered in xend. If I turn them on, they just "disappear", and when I start machines directly from xml, they just doesn't appear at all. Libvirt is correctly connecting to xen as I can use the other commands fine, just the list option doesn't seem to work at all. What can I do to change that? # virsh version Compiled against library: libvir 0.8.8 Using library: libvir 0.8.8 Using API: Xen 3.0.1 Running hypervisor: Xen 4.1.0

2 1

[libvirt-users] qemu-kvm fails on RHEL6
by sumit sengupta 02 Jul '12

02 Jul '12

Hi, When I'm trying to run qemu-kvm command on RHEL6(linux kernel 2.6.32) then I get following errors which I think related to tap devices in my setup. Any idea why is that? bash$ LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -S -M rhel6.2.0 -enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name instance-00000027 -uuid a93aeed9-15f7-4ded-b6b3-34c8d2c101a8 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-00000027.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -kernel /home/sumitsen/openstack/nova/instances/instance-00000027/kernel -initrd /home/sumitsen/openstack/nova/instances/instance-00000027/ramdisk -append root=/dev/vda console=ttyS0 -drive file=/home/sumitsen/openstack/nova/instances/instance-00000027/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -netdev tap,fd=26,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:15:84:3e,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/home/sumitsen/openstack/nova/instances/instance-00000027/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:0 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 char device redirected to /dev/pts/1 qemu-kvm: -netdev tap,fd=26,id=hostnet0: TUNGETIFF ioctl() failed: Bad file descriptor TUNSETOFFLOAD ioctl() failed: Bad file descriptor qemu-kvm: -append root=/dev/vda: could not open disk image console=ttyS0: No such file or directory [sumitsen@sorrygate-dr ~]$ rpm -qa qemu-kvm qemu-kvm-0.12.1.2-2.209.el6.x86_64 Let me know if you need any other info. Thanks, Sumit

2 1

[libvirt-users] How does libvirt interaction with KVM to create a VM?
by Dennis Chen 02 Jul '12

02 Jul '12

All, These days I am trying to understand the interaction relationship between the libvirt and KVM kernel module, eg. kvm_intel.ko. We know that KVM kernel module expose an entry in form of device file "/dev/kvm" which can be accessed by user space application to control, for example, create a VM using KVM_CREATE_VM with help of ioctl. Now let's say the tool virsh based upon libvirt, we can create a guest domain with the command looks like: #virsh create guest.xml Obviously, the above command will create a VM. But when I try to investigate the libvirt code, I can't find any code play with the "/dev/kvm" to send KVM_CREATE_VM ioctl code to KVM kernel module. But I do found that the reference count of the kvm_intel.ko changed before the virsh create command launched and after. So my question is: how does the libvirt interaction with KVM to create a VM? Anybody can give me some tips about that, eg, the corresponding codes in libvirt? BRs. Dennis

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[libvirt-users] Query:Creating a Guest that requires memory and vCPUs across socket boundary
by sanjay 30 Jun '12

30 Jun '12

Hi! If a KVM-QEMU guest (spawned using libvirt) requires memory and CPU cores that spans across socket boundaries and it wants to avoid memory access across NUMA nodes, what is the best way to proceed ? I came across the following statement during my search “If a guest requires eight virtual CPUs, as each NUMA node only has four physical CPUs, a better utilization may be obtained by running a pair of four virtual CPU guests and splitting the work between them, rather than using a single 8 CPU guest.” Is this statement still valid ? Can one use ‘numatune’ XML tag with ‘auto’ placement to create a guest, where vCPUs and memory is allocated in a efficient manner across sockets based on available memory? If one allocates memory across sockets and passes the topology information to Guest using 'numa' tag, will it help in avoiding the NUMA penalty (ex: <numa>/<cell cpus='0' memory=256000'><cell cpus='1' memory='512000') ? Any advise on this subject will be appreciated. -- Regards, Sanjay

1 0

[libvirt-users] How to start a storage pool using libvirt?
by Ananth 29 Jun '12

29 Jun '12

Hi what is the libvirt API call to start an inactive storage pool created using the python binding storagePoolDefineXML() ? There seems to be a virsh command which is pool-start <pool-name>, but I am not sure what would be the call to start it. Or is there a way to start the pool while it is being defined itself? The autostart will be effective only when libvirtd service is restarted? Thank you -- Regards Ananth

2 2

[libvirt-users] Storage Pools & nodedev-create specific scsi_host#?
by mdecheser＠comcast.net 29 Jun '12

29 Jun '12

Hello everyone, Current host build is RHEL 6.2, soon to be upgrading. I'm in the process of mapping out a KVM/RHEV topology. I have questions about the landscape of storage pools and the instantiation of specific scsi_host IDs using virsh nodedev-create and some magic XML definitions. I'm grouping these questions together because the answer to one may impact the other. High-level goals: - fence off I/O by providing NPIV paths to VMs individually - provide each VM with a pair of paths to the same storage for redundancy Problem 1 - Storage Pools: I've successfully created a storage pool by starting with an initial SCSI host based off one of my virtual HBAs. I see my LUNs. I performed a virsh pool-dumpxml and captured the configuration of the storage pool using just one SCSI host. I then modified the XML file to include a 2nd SCSI host, stopped & deleted the original storage pool, then created & started a new storage pool. In the GUI, I am able to see the same LUNs, listed twice (once for each path). Here's my XML file: <pool type='scsi'> <name>VM1POOL</name> <uuid>f0465f3f-3c9c-766c-3c96-678a99ec81cb</uuid> <capacity>144813588480</capacity> <allocation>144813588480</allocation> <available>0</available> <source> <adapter name='host5'/> </source> <source> <adapter name='host6'/> </source> <target> <path>/dev/disk/by-path</path> <permissions> <mode>0700</mode> <owner>-1</owner> <group>-1</group> </permissions> </target> </pool> Question 1 - Is this the correct approach for presenting a VM with SAN storage in a redundant fashion? Or should I instead use the mpath approach and find some way with the storage pool XML file to restrict which mpath devices are utilized (thereby restricting which LUNs the storage pool sees?). It seems my current approach provides each LUN twice, however a LUN has two different volume identifiers based on its path: UNIT:0:0:13 UNIT:0:1:13 Problem 2 - Specifying scsi_host# in a device XML file As I mentioned, I've successfully created a virtual HBA using virsh nodedev-create and an XML config. Here's a sample config: [root@host ~]# cat vm1vhba1.xml <device> <parent>scsi_host3</parent> <capability type='scsi_host'> <capability type='fc_host'> <wwnn>a97a3b9220010002</wwnn> <wwpn>a97a3b9220010001</wwpn> </capability> <capability type='vport_ops' /> </capability> </device> Pretty straightforward. The parent is physical SCSI host 3. The resulting SCSI host is 5. This is one of the SCSI hosts used in the storage pool above. So, I wanted to test what would happen to my VM if I ran virsh nodedev-destroy scsi_host5. Essentially, testing the redundancy of the paths to the VM. The device was successfully deleted, however a few other things happened, both expected and unexpected. - Since I only associated one of the two LUN units from my storage pool with the VM, I expected this to cause the VM to fail. It did fail, however in a headless fashion. Unexpected. The VM is still up and running in memory. Any effort to write out to the disks results in failures like "read-only filesystem". Expected. - The Storage Pool entered into an inactive state. Unexpected. Efforts to restart the storage pool using virsh pool-start failed because one of the scsi_host devices was not present. Expected. I tried to recreate the device using virsh nodedev-create vm1vhba1.xml, and the device was created successfully but as scsi_host9 (the next available scsi_host beyond the original scsi_host5). So, unless I can recreate this scsi_host5, I won't be able to restart my storage pool and restore I/O to my VM. Question 2: Is there a definition I can use in the XML config to specify the resulting scsi_host #? I've been told that RHEL 6.3 is supposed to provide some methodology of auto-instantiating my virtual HBAs upon the reboot of a host so that the VMs on the will see their storage and can start automatically on boot. I have a feeling that the answer to my question may be brushing up against this functionality. I am also assuming that if it's possible to specify the scsi_host# in my XML config, that I'll be able to restart my storage pool successfully and that will enable my VM to reestablish the connection to their storage. Thanks in advance, MD

2 1

[libvirt-users] Speed of physical NIC?
by Marcel Müller 28 Jun '12

28 Jun '12

Hello everyone, Im trying to use libvirt to calculate some statistics about the current guest utilizations, but I do have some problems in regards of networking. I can do sampling of network speed by using the interfaceStats-API over a predefined period of time. But to calculate the percentage of the used bandwidth I need to know to what kind of network the interface is connected to 100 Mbit/s, 1000 Mbit/s, ? Is there any way to get this information through Libvirt or is there any addition planned for that? Thank you very much in advance, Best Regards, Marcel

1 0

[libvirt-users] Trouble connecting to XenServer HyperVisor with Java bindings
by Nick Mathews 27 Jun '12

27 Jun '12

Hello, I am trying to use the libvirt Java bindings (version 0.4.7) with libvirt version 0.9.12 to connect to a XenServer hypervisor. Virsh is able to connect to my XenServer, but when I try to do the same thing in Java, it won't connect. Here is the debug output: 2012-06-26 19:48:52.259+0000: 26051: info : libvirt version: 0.9.12, package: 1.fc16 (Unknown, 2012-06-26-11:43:53, flynx) 2012-06-26 19:48:52.259+0000: 26051: warning : virLogParseOutputs:993 : Ignoring invalid log output setting. WARNING: no socket to connect to 2012-06-26 19:48:52.275+0000: 26051: debug : virInitialize:414 : register drivers 2012-06-26 19:48:52.277+0000: 26051: debug : virRegisterDriver:775 : driver=0x4dad5a0 name=Test 2012-06-26 19:48:52.277+0000: 26051: debug : virRegisterDriver:799 : registering Test as driver 0 2012-06-26 19:48:52.277+0000: 26051: debug : virRegisterNetworkDriver:592 : registering Test as network driver 0 2012-06-26 19:48:52.277+0000: 26051: debug : virRegisterInterfaceDriver:625 : registering Test as interface driver 0 2012-06-26 19:48:52.277+0000: 26051: debug : virRegisterStorageDriver:658 : registering Test as storage driver 0 2012-06-26 19:48:52.277+0000: 26051: debug : virRegisterDeviceMonitor:691 : registering Test as device driver 0 2012-06-26 19:48:52.277+0000: 26051: debug : virRegisterSecretDriver:724 : registering Test as secret driver 0 2012-06-26 19:48:52.277+0000: 26051: debug : virRegisterNWFilterDriver:757 : registering Test as network filter driver 0 2012-06-26 19:48:52.279+0000: 26051: debug : virRegisterDriver:775 : driver=0x4dae100 name=Xen 2012-06-26 19:48:52.280+0000: 26051: debug : virRegisterDriver:799 : registering Xen as driver 1 2012-06-26 19:48:52.283+0000: 26051: debug : virRegisterDriver:775 : driver=0x4dae960 name=OPENVZ 2012-06-26 19:48:52.283+0000: 26051: debug : virRegisterDriver:799 : registering OPENVZ as driver 2 2012-06-26 19:48:52.283+0000: 26051: debug : virRegisterDriver:775 : driver=0x4daec00 name=VMWARE 2012-06-26 19:48:52.283+0000: 26051: debug : virRegisterDriver:799 : registering VMWARE as driver 3 2012-06-26 19:48:52.283+0000: 26051: debug : virRegisterDriver:775 : driver=0x4dae5a0 name=PHYP 2012-06-26 19:48:52.284+0000: 26051: debug : virRegisterDriver:799 : registering PHYP as driver 4 2012-06-26 19:48:52.284+0000: 26051: debug : virRegisterStorageDriver:658 : registering PHYP as storage driver 1 2012-06-26 19:48:52.285+0000: 26051: debug : virRegisterInterfaceDriver:625 : registering PHYP as interface driver 1 2012-06-26 19:48:52.286+0000: 26051: debug : vboxRegister:137 : VBoxCGlueInit failed, using dummy driver 2012-06-26 19:48:52.286+0000: 26051: debug : virRegisterDriver:775 : driver=0x4daeea0 name=VBOX 2012-06-26 19:48:52.287+0000: 26051: debug : virRegisterDriver:799 : registering VBOX as driver 5 2012-06-26 19:48:52.287+0000: 26051: debug : virRegisterNetworkDriver:592 : registering VBOX as network driver 1 2012-06-26 19:48:52.287+0000: 26051: debug : virRegisterStorageDriver:658 : registering VBOX as storage driver 2 2012-06-26 19:48:52.290+0000: 26051: debug : virRegisterDriver:775 : driver=0x4db0a60 name=ESX 2012-06-26 19:48:52.290+0000: 26051: debug : virRegisterDriver:799 : registering ESX as driver 6 2012-06-26 19:48:52.291+0000: 26051: debug : virRegisterInterfaceDriver:625 : registering ESX as interface driver 2 2012-06-26 19:48:52.292+0000: 26051: debug : virRegisterNetworkDriver:592 : registering ESX as network driver 2 2012-06-26 19:48:52.293+0000: 26051: debug : virRegisterStorageDriver:658 : registering ESX as storage driver 3 2012-06-26 19:48:52.294+0000: 26051: debug : virRegisterDeviceMonitor:691 : registering ESX as device driver 1 2012-06-26 19:48:52.294+0000: 26051: debug : virRegisterSecretDriver:724 : registering ESX as secret driver 1 2012-06-26 19:48:52.294+0000: 26051: debug : virRegisterNWFilterDriver:757 : registering ESX as network filter driver 1 2012-06-26 19:48:52.296+0000: 26051: debug : virRegisterDriver:775 : driver=0x4db0f40 name=Hyper-V 2012-06-26 19:48:52.297+0000: 26051: debug : virRegisterDriver:799 : registering Hyper-V as driver 7 2012-06-26 19:48:52.297+0000: 26051: debug : virRegisterInterfaceDriver:625 : registering Hyper-V as interface driver 3 2012-06-26 19:48:52.298+0000: 26051: debug : virRegisterNetworkDriver:592 : registering Hyper-V as network driver 3 2012-06-26 19:48:52.299+0000: 26051: debug : virRegisterStorageDriver:658 : registering Hyper-V as storage driver 4 2012-06-26 19:48:52.299+0000: 26051: debug : virRegisterDeviceMonitor:691 : registering Hyper-V as device driver 2 2012-06-26 19:48:52.299+0000: 26051: debug : virRegisterSecretDriver:724 : registering Hyper-V as secret driver 2 2012-06-26 19:48:52.300+0000: 26051: debug : virRegisterNWFilterDriver:757 : registering Hyper-V as network filter driver 2 2012-06-26 19:48:52.300+0000: 26051: debug : virRegisterDriver:775 : driver=0x4db07c0 name=XenAPI 2012-06-26 19:48:52.301+0000: 26051: debug : virRegisterDriver:799 : registering XenAPI as driver 8 2012-06-26 19:48:52.305+0000: 26051: debug : virRegisterDriver:775 : driver=0x4dada80 name=remote 2012-06-26 19:48:52.305+0000: 26051: debug : virRegisterDriver:799 : registering remote as driver 9 2012-06-26 19:48:52.305+0000: 26051: debug : virRegisterNetworkDriver:592 : registering remote as network driver 4 2012-06-26 19:48:52.306+0000: 26051: debug : virRegisterInterfaceDriver:625 : registering remote as interface driver 4 2012-06-26 19:48:52.306+0000: 26051: debug : virRegisterStorageDriver:658 : registering remote as storage driver 5 2012-06-26 19:48:52.306+0000: 26051: debug : virRegisterDeviceMonitor:691 : registering remote as device driver 3 2012-06-26 19:48:52.306+0000: 26051: debug : virRegisterSecretDriver:724 : registering remote as secret driver 3 2012-06-26 19:48:52.306+0000: 26051: debug : virRegisterNWFilterDriver:757 : registering remote as network filter driver 3 2012-06-26 19:48:52.395+0000: 26051: debug : virConnectOpenAuth:1455 : name=xenapi://root@192.168.1.6?no_verify=1, auth=0x8beed7c0, flags=0 2012-06-26 19:48:52.643+0000: 26051: debug : virConnectGetConfigFile:1008 : Loading config file '/etc/libvirt/libvirt.conf' 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1182 : name "xenapi:// root(a)192.168.1.6?no_verify=1" to URI components: scheme xenapi server 192.168.1.6 user root port 0 path (null) 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1226 : trying driver 0 (Test) ... 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1232 : driver 0 Test returned DECLINED 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1226 : trying driver 1 (Xen) ... 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1232 : driver 1 Xen returned DECLINED 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1226 : trying driver 2 (OPENVZ) ... 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1232 : driver 2 OPENVZ returned DECLINED 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1226 : trying driver 3 (VMWARE) ... 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1232 : driver 3 VMWARE returned DECLINED 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1226 : trying driver 4 (PHYP) ... 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1232 : driver 4 PHYP returned DECLINED 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1226 : trying driver 5 (VBOX) ... 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1232 : driver 5 VBOX returned DECLINED 2012-06-26 19:48:52.647+0000: 26051: debug : do_open:1226 : trying driver 6 (ESX) ... 2012-06-26 19:48:52.648+0000: 26051: debug : do_open:1232 : driver 6 ESX returned DECLINED 2012-06-26 19:48:52.648+0000: 26051: debug : do_open:1226 : trying driver 7 (Hyper-V) ... 2012-06-26 19:48:52.648+0000: 26051: debug : do_open:1232 : driver 7 Hyper-V returned DECLINED 2012-06-26 19:48:52.649+0000: 26051: debug : do_open:1226 : trying driver 8 (XenAPI) ... 2012-06-26 19:48:52.649+0000: 26051: debug : virAuthGetConfigFilePath:48 : Determining auth config file path 2012-06-26 19:48:52.651+0000: 26051: debug : virAuthGetConfigFilePath:74 : Checking for readability of '/root/.libvirt/auth.conf' 2012-06-26 19:48:52.652+0000: 26051: debug : virAuthGetConfigFilePath:83 : Checking for readability of '/etc/libvirt/auth.conf' 2012-06-26 19:48:52.653+0000: 26051: debug : virAuthGetConfigFilePath:92 : Using auth file '(null)' 2012-06-26 19:48:53.279+0000: 26051: debug : do_open:1232 : driver 8 XenAPI returned SUCCESS 2012-06-26 19:48:53.279+0000: 26051: debug : do_open:1254 : network driver 0 Test returned DECLINED 2012-06-26 19:48:53.279+0000: 26051: debug : do_open:1254 : network driver 1 VBOX returned DECLINED 2012-06-26 19:48:53.279+0000: 26051: debug : do_open:1254 : network driver 2 ESX returned DECLINED 2012-06-26 19:48:53.279+0000: 26051: debug : do_open:1254 : network driver 3 Hyper-V returned DECLINED 2012-06-26 19:48:53.279+0000: 26051: debug : doRemoteOpen:542 : proceeding with name = xenapi:// 2012-06-26 19:48:53.280+0000: 26051: debug : doRemoteOpen:552 : Connecting with transport 0 2012-06-26 19:48:53.280+0000: 26051: debug : virNetTLSContextLocateCredentials:753 : pkipath=(null) isServer=0 tryUserPkiPath=0 2012-06-26 19:48:53.280+0000: 26051: debug : virNetTLSContextLocateCredentials:825 : Using default TLS CA certificate path 2012-06-26 19:48:53.280+0000: 26051: debug : virNetTLSContextLocateCredentials:831 : Using default TLS CA revocation list path 2012-06-26 19:48:53.280+0000: 26051: debug : virNetTLSContextLocateCredentials:837 : Using default TLS key/certificate path 2012-06-26 19:48:53.306+0000: 26051: debug : virNetClientClose:521 : client=(nil) 2012-06-26 19:48:53.306+0000: 26051: debug : do_open:1254 : network driver 4 remote returned ERROR 2012-06-26 19:48:53.306+0000: 26051: debug : do_open:1269 : interface driver 0 Test returned DECLINED 2012-06-26 19:48:53.306+0000: 26051: debug : do_open:1269 : interface driver 1 PHYP returned DECLINED 2012-06-26 19:48:53.307+0000: 26051: debug : do_open:1269 : interface driver 2 ESX returned DECLINED 2012-06-26 19:48:53.307+0000: 26051: debug : do_open:1269 : interface driver 3 Hyper-V returned DECLINED 2012-06-26 19:48:53.307+0000: 26051: debug : doRemoteOpen:542 : proceeding with name = xenapi:// 2012-06-26 19:48:53.307+0000: 26051: debug : doRemoteOpen:552 : Connecting with transport 0 2012-06-26 19:48:53.307+0000: 26051: debug : virNetTLSContextLocateCredentials:753 : pkipath=(null) isServer=0 tryUserPkiPath=0 2012-06-26 19:48:53.307+0000: 26051: debug : virNetTLSContextLocateCredentials:825 : Using default TLS CA certificate path 2012-06-26 19:48:53.307+0000: 26051: debug : virNetTLSContextLocateCredentials:831 : Using default TLS CA revocation list path 2012-06-26 19:48:53.307+0000: 26051: debug : virNetTLSContextLocateCredentials:837 : Using default TLS key/certificate path 2012-06-26 19:48:53.308+0000: 26051: debug : virNetClientClose:521 : client=(nil) 2012-06-26 19:48:53.308+0000: 26051: debug : do_open:1269 : interface driver 4 remote returned ERROR 2012-06-26 19:48:53.308+0000: 26051: debug : do_open:1285 : storage driver 0 Test returned DECLINED 2012-06-26 19:48:53.308+0000: 26051: debug : do_open:1285 : storage driver 1 PHYP returned DECLINED 2012-06-26 19:48:53.308+0000: 26051: debug : do_open:1285 : storage driver 2 VBOX returned DECLINED 2012-06-26 19:48:53.308+0000: 26051: debug : do_open:1285 : storage driver 3 ESX returned DECLINED 2012-06-26 19:48:53.308+0000: 26051: debug : do_open:1285 : storage driver 4 Hyper-V returned DECLINED 2012-06-26 19:48:53.308+0000: 26051: debug : doRemoteOpen:542 : proceeding with name = xenapi:// 2012-06-26 19:48:53.308+0000: 26051: debug : doRemoteOpen:552 : Connecting with transport 0 2012-06-26 19:48:53.308+0000: 26051: debug : virNetTLSContextLocateCredentials:753 : pkipath=(null) isServer=0 tryUserPkiPath=0 2012-06-26 19:48:53.308+0000: 26051: debug : virNetTLSContextLocateCredentials:825 : Using default TLS CA certificate path 2012-06-26 19:48:53.308+0000: 26051: debug : virNetTLSContextLocateCredentials:831 : Using default TLS CA revocation list path 2012-06-26 19:48:53.308+0000: 26051: debug : virNetTLSContextLocateCredentials:837 : Using default TLS key/certificate path 2012-06-26 19:48:53.309+0000: 26051: debug : virNetClientClose:521 : client=(nil) 2012-06-26 19:48:53.309+0000: 26051: debug : do_open:1285 : storage driver 5 remote returned ERROR 2012-06-26 19:48:53.309+0000: 26051: debug : do_open:1301 : node driver 0 Test returned DECLINED 2012-06-26 19:48:53.309+0000: 26051: debug : do_open:1301 : node driver 1 ESX returned DECLINED 2012-06-26 19:48:53.309+0000: 26051: debug : do_open:1301 : node driver 2 Hyper-V returned DECLINED 2012-06-26 19:48:53.309+0000: 26051: debug : doRemoteOpen:542 : proceeding with name = xenapi:// 2012-06-26 19:48:53.309+0000: 26051: debug : doRemoteOpen:552 : Connecting with transport 0 2012-06-26 19:48:53.309+0000: 26051: debug : virNetTLSContextLocateCredentials:753 : pkipath=(null) isServer=0 tryUserPkiPath=0 2012-06-26 19:48:53.309+0000: 26051: debug : virNetTLSContextLocateCredentials:825 : Using default TLS CA certificate path 2012-06-26 19:48:53.309+0000: 26051: debug : virNetTLSContextLocateCredentials:831 : Using default TLS CA revocation list path 2012-06-26 19:48:53.309+0000: 26051: debug : virNetTLSContextLocateCredentials:837 : Using default TLS key/certificate path 2012-06-26 19:48:53.309+0000: 26051: debug : virNetClientClose:521 : client=(nil) 2012-06-26 19:48:53.310+0000: 26051: debug : do_open:1301 : node driver 3 remote returned ERROR 2012-06-26 19:48:53.310+0000: 26051: debug : do_open:1317 : secret driver 0 Test returned DECLINED 2012-06-26 19:48:53.310+0000: 26051: debug : do_open:1317 : secret driver 1 ESX returned DECLINED 2012-06-26 19:48:53.310+0000: 26051: debug : do_open:1317 : secret driver 2 Hyper-V returned DECLINED 2012-06-26 19:48:53.310+0000: 26051: debug : doRemoteOpen:542 : proceeding with name = xenapi:// 2012-06-26 19:48:53.310+0000: 26051: debug : doRemoteOpen:552 : Connecting with transport 0 2012-06-26 19:48:53.310+0000: 26051: debug : virNetTLSContextLocateCredentials:753 : pkipath=(null) isServer=0 tryUserPkiPath=0 2012-06-26 19:48:53.310+0000: 26051: debug : virNetTLSContextLocateCredentials:825 : Using default TLS CA certificate path 2012-06-26 19:48:53.310+0000: 26051: debug : virNetTLSContextLocateCredentials:831 : Using default TLS CA revocation list path 2012-06-26 19:48:53.311+0000: 26051: debug : virNetTLSContextLocateCredentials:837 : Using default TLS key/certificate path 2012-06-26 19:48:53.311+0000: 26051: debug : virNetClientClose:521 : client=(nil) 2012-06-26 19:48:53.311+0000: 26051: debug : do_open:1317 : secret driver 3 remote returned ERROR 2012-06-26 19:48:53.311+0000: 26051: debug : do_open:1333 : nwfilter driver 0 Test returned DECLINED 2012-06-26 19:48:53.311+0000: 26051: debug : do_open:1333 : nwfilter driver 1 ESX returned DECLINED 2012-06-26 19:48:53.311+0000: 26051: debug : do_open:1333 : nwfilter driver 2 Hyper-V returned DECLINED 2012-06-26 19:48:53.311+0000: 26051: debug : doRemoteOpen:542 : proceeding with name = xenapi:// 2012-06-26 19:48:53.311+0000: 26051: debug : doRemoteOpen:552 : Connecting with transport 0 2012-06-26 19:48:53.311+0000: 26051: debug : virNetTLSContextLocateCredentials:753 : pkipath=(null) isServer=0 tryUserPkiPath=0 2012-06-26 19:48:53.311+0000: 26051: debug : virNetTLSContextLocateCredentials:825 : Using default TLS CA certificate path 2012-06-26 19:48:53.312+0000: 26051: debug : virNetTLSContextLocateCredentials:831 : Using default TLS CA revocation list path 2012-06-26 19:48:53.312+0000: 26051: debug : virNetTLSContextLocateCredentials:837 : Using default TLS key/certificate path 2012-06-26 19:48:53.313+0000: 26051: debug : virNetClientClose:521 : client=(nil) 2012-06-26 19:48:53.313+0000: 26051: debug : do_open:1333 : nwfilter driver 3 remote returned ERROR Unable to connect: Cannot read CA certificate '/etc/pki/CA/cacert.pem': No such file or directory Even though the output mentions not finding a CA certificate, that's not the problem. I have a custom ConnectAuth class so the user can give the password before trying to connect and isn't prompted for it. The problem occurs when trying to create the Connect Object. -- Thanks, Nick Mathews

1 0

[libvirt-users] manipulation extra features which hypervisors support
by Rashid Zamani 27 Jun '12

27 Jun '12

Hello everybody, I am wondering if libvirt community implement features specefic to only one supported hypervisor? I am trying to set the host name and DNS from within the libvirt xml file in user mode network option (SLiRP). Right now I am using the <qemu:commandline>. My concern is if I want to use Xen or other hypervisors, how I should do the same. To be honest, I have not used any other hypervisor, except QEMU yet, I am trying to write a code which can be used for any hypervisor libvirt supports, though. And I am not even sure if it is possible to set DNS address and so on the way they are settable in QEMU. Therefore, I was thinking if there is any standard xml element in <interface> which I may use to solve my problem (setting dns, host name , and so on...) with. On the IRC channel I received a reply that this feature has not been implemented yet, and you are going to support it soon. I am interested to contribute and join the community to imlement this feature if possible. Appreciate pointing me into right direction and thank you in advance. Zamani

2 1

[libvirt-users] Can I update the DNS configuration of an existing network?
by Kees van Reeuwijk 26 Jun '12

26 Jun '12

Hello, As part of a research project on cloud management, I am developing software to create on-demand networks between VMs on different hosts. The deployment of the VMs themselves is done by OpenNebula, but for the management of the networks I have to bypass OpenNebula, and I talk directly with libvirt. One of the features of our network management is that we allow network connections to be created and destroyed at any moment in the life of a VM. This means that we use hotplugging. It also means that we want a VM to discover its network parameters for a particular NIC using DHCP and DNS. I have something that mostly works now: I create an XML for each network, I can hot-plug new NICs in the VM using libvirt, and DHCP on the new interface works. However, DNS does not work properly. I have to create a mapping between the MAC, IP address, and the name of a VM at the moment I create the network XML. Setting the MAC <-> IP mapping at that time is fine, but fixing the mapping between IP address and name at that time is not reasonable. I do not know what name will be used before I add a new machine, and during the lifetime of the network there may even be different names associated with a particular IP address. Is there a way I can change/update the DNS configuration of a network after it has been created? I could simply create a new network XML file and stop/start the network, but I suspect that is too disruptive. Is there a less intrusive way to do this? Another thing I would very much like to do is to talk to libvirt directly from my management software (written in Java), rather than through the command line. I know there is a Java API for libvirt, but I have not been able to find any up-to-date documentation on it. Is the functionality that I need accessible through the Java API? Is there enough documentation of the API for this, and where is it? -- Dr. Ir. Kees van Reeuwijk, Vrije Universiteit Amsterdam

1 0

[libvirt-users] USB Host Controllers
by Michael Hierweck 26 Jun '12

26 Jun '12

Hi, it is possible to define a domain along with several usb host controllers, e.g. <controller type='usb' index='0' model='ich9-ehci' /> <controller type='usb' index='1' model='ich9-uhci' /> How to distinguish between those controllers/busses when adding input or host devices such as <input type='tablet' bus='usb'/> <hostdev mode='subsystem' type='usb' managed='no'> <source> <vendor id='...'/> <product id='...'/> </source> </hostdev> Without explicit assignment either every device seems to be attached to the uhci controller or the domain refuses to start because the tablet is attached to the ehci controller implicitly, depending on the order of the controller definition (index). Thanks in advance Michael -- EDV-Serviceteam Annika & Michael Hierweck GbR Egerstraße 53, 44225 Dortmund (Germany) http://www.edv-serviceteam.net

2 1

[libvirt-users] Is it possible to in live migration?
by GaoYi 25 Jun '12

25 Jun '12

Hi all, In live migration using shared memory, there would be a following step to input the password after typing: migrate --live vm_name qemu+ssh://Destination_IP/system. . I wonder if it is possible to include the password in the URI so that the password procedure can be avoided? Thanks, Yi

3 4

[libvirt-users] editing pools
by Dave Allan 25 Jun '12

25 Jun '12

On Fedora 17 I used virsh pool-edit to change the directory of the default pool that virt-manager creates, and I noticed that my changes were discarded unless I made the changes with the pool stopped. Is that expected behavior? Dave

3 2

[libvirt-users] PCI Passthrough
by Michael Hierweck 25 Jun '12

25 Jun '12

Hi, I'm trying to passthrough legacy PCI ISDN controller to a KVM based virtual machine: <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x04' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </hostdev> This only worked once. (The device disappeared from the lspci autoput the host and was listed on the guest.) After shutting down the virtual maschine it refused to start again. Even rebooting the host did not help: Failed to assign irq for "hostdev0": Input/output error Perhaps you are assigning a device that shares an IRQ with another device? lspci -t -[0000:00]-+-00.0 +-19.0 +-1a.0 +-1c.0-[01]----00.0 +-1c.4-[02]----00.0 +-1c.5-[03]----00.0 +-1d.0 +-1e.0-[04]----00.0 +-1f.0 +-1f.2 \-1f.3 lspci -vv |grep IRQ Interrupt: pin A routed to IRQ 44 Interrupt: pin B routed to IRQ 22 Interrupt: pin A routed to IRQ 20 Interrupt: pin B routed to IRQ 48 Interrupt: pin D routed to IRQ 22 Interrupt: pin A routed to IRQ 16 Interrupt: pin A routed to IRQ 16 Interrupt: pin A routed to IRQ 3 Interrupt: pin A routed to IRQ 16 The last line "pin A routed to IRQ 16" belongs to my device: 04:00.0 Communication controller: Tiger Jet Network Inc. Tiger100APC ISDN chipset Subsystem: Device 0054:0001 Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Interrupt: pin A routed to IRQ 16 Region 0: I/O ports at 2000 [size=256] Region 1: Memory at e2600000 (32-bit, non-prefetchable) [size=4K] Capabilities: [40] Power Management version 1 Flags: PMEClk- DSI+ D1- D2+ AuxCurrent=0mA PME(D0+,D1-,D2+,D3hot+,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Note: After rebooting the host lscpi claims that "pin A is routed to interrupt 255" for that device. The invocation to virsh start <vm> changes that to 16. Nearly every document about PCI passthrough claims that unshared interrupts are required. But how can this be achieved? (My BIOS supports interrupt remapping for VT-d. This setting is enabled.) Thanks in advance Michael -- EDV-Serviceteam Annika & Michael Hierweck GbR Egerstraße 53, 44225 Dortmund (Germany) http://www.edv-serviceteam.net

1 0

[libvirt-users] unable to creating/list storage pools using non-root user
by mallapadi niranjan 23 Jun '12

23 Jun '12

Hi all I have a Fedora release 17 (Beefy Miracle) with libvirt versions: libvirt-0.9.11.3-1.fc17.x86_64 virt-manager-0.9.1-3.fc17.noarch I have allowed non-root user to user libvirt by allowing the user through polkit cat /etc/polkit-1/localauthority/50-local.d/cat 50-org.example-libvirt-remote-access.pkla [Remote libvirt SSH access] Identity=unix-group:virt Action=org.libvirt.unix.manage;org.libvirt.unix.monitor ResultAny=yes ResultInactive=yes ResultActive=yes After doing the above i am able to connect to virt-manager as non-root user but unable to create storage pools. [juno@reserved ~]$ id uid=1001(juno) gid=1001(juno) groups=1001(juno),1002(virt) context=staff_u:staff_r:staff_t:s0 [juno@reserved ~]$ virsh Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # pool-list error: Failed to reconnect to the hypervisor error: no valid connection error: Failed to connect socket to '@/home/juno/.libvirt/libvirt-sock': Connection refused virsh # list error: Failed to reconnect to the hypervisor error: no valid connection error: Failed to connect socket to '@/home/juno/.libvirt/libvirt-sock': Connection refused I have defined pool called virt-images (/virt-images) which the non-root (in this case the username is Juno) user has the read/write permissions Also tried adding the permissions to unix socket in /etc/libvirt/libvirtd.conf as below: cat /etc/libvirt/libvirtd.conf | grep -v ^$ | grep -v ^# unix_sock_group = "virt" unix_sock_ro_perms = "0777" unix_sock_rw_perms = "0770" unix_sock_dir = "/var/run/libvirt" But the unix socket are created in /var/run/libvirt and not in users home directory, So how do we make a non-root user virsh commands check the socket created in /var/run/libvirt. It always checks for the socket in user's home directory ? Any pointers on above would be helpfu. Regards Niranjan

2 6

[libvirt-users] virtio_rng in a KVM VM
by Marc Haber 22 Jun '12

22 Jun '12

Hi, I am virtualizing with KVM via libvirt and virt-manager. To have decent amounts of Entropy in the guest, I tried loading virtio_rng in a running VM. Despite the module being loaded, I didn't get any log entries, and also no /dev/hwrng. Do I need to enable the virtualized random generator in libvirt/virt-manager? If so, how do I do that? Is the support for this rather recent feature already implemented in qemu-kvm 1.0, libvirt 0.9.12 and virt-manager 0.9.1? Any hints will be appreciated. Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 31958061 Nordisch by Nature | How to make an American Quilt | Fax: *49 621 31958062

2 2

[libvirt-users] Remote virtualization with Xen, feasibility
by Jørgen Nordmoen 22 Jun '12

22 Jun '12

Hello. I'm wondering if a scenario which I'm tasked to setup would be feasible to create with libvirt. The scenario is; we want to have one computer running ns-3[1] which will simulate a MANET[2] this computer will be connected to a second computer(how is not quite clear to me yet) this second computer will be running several Xen or LXC domains where each domain is connected to a node in the ns-3 simulation. Inside each domain we will run an program which will use service-discovery to interact with all the other domains which from the point of view of a specific domain will look like wireless nodes in a network(accomplished with the ns-3 simulation, connecting the ns-3 nodes to taps[3] outside the simulation and then connecting these taps to the remote computer running libvirt and Xen or LXC). What I'm wondering is if the libvirt side of this is feasible, namely creating several domains remotely, on one or hopefully more computers, having the domains on the same computer share a storage area where we can place shared programs and where programs running inside the domains can log output to. Then after the program is done retrieve these output logs and shutdown all of the domains. When it comes to Xen, we will most likely crate a snapshot of a running Linux distribution that we can quickly start so we don't need to do a full boot process every time. Below is a very simple illustration of what we want to accomplish. Each Xen domain is connected to a specific tap device in the ns-3 server. ns-3 server libvirt server +----------------------+ +-----------------------------+ | | | +-----+ +------+ | | +-------------+ | | |Xen1| ... |XenX| | | | ns-3 | | | +-----+ +------+ | | +-------------+ | | | | tap-1 ... tap-X | | | +----------------------+ +-----------------------------+ | | | | ------------------------------------------------------------------------------------ LAN Is this possible to create with the help of libvirt? Ps. My reasoning to want to do this with libvirt is that we get support for both Xen, QEMU/KVM and LXC and libvirt has, from my first impressions, good support for Python which means quicker prototyping and better looking code. Best regards Jørgen Nordmoen [1] http://www.nsnam.org [2] https://en.wikipedia.org/wiki/MANET [3] https://en.wikipedia.org/wiki/TUN/TAP

1 0

[libvirt-users] Libvert live migration problem!
by GaoYi 22 Jun '12

22 Jun '12

Hi all, I've succeed to do live migration between two PCs. However, I found I could not connect the VM by host IP from a remote PC before migration and can only connect it from host PC. If I appended the VM with the following line at the end of the xml file: <listen type='address' address=host_IP port='PORT'> I can connect the VM via VNCVIEWER with host_IP:PORT. However, the libvirt reported: error: failed to bind the <host_IP, PORT>...It seems that the IP:port is already bound. Can someone show how to do live migration using NFS? Thanks, Yi

2 1

[libvirt-users] Cannot create macvlan devices on this platform
by Michael Hierweck 21 Jun '12

21 Jun '12

Hi, libvirt (0.9.11) refuses to start KVM based virtual machines on my system when changing the network connection from "host bridge" to "direct" (macvtap/macvlan), neither in "bridge" nor in "vepa" mode: "Cannot create macvlan devices on this platform" That's astonishing because I can easily setup working macvlan devices using the "ip" command: "ip link add link eth0 type macvlan". Would someone help me figure out the reason? Thanks in advance Michael -- EDV-Serviceteam Annika & Michael Hierweck GbR Egerstraße 53, 44225 Dortmund (Germany) http://www.edv-serviceteam.net

2 1

[libvirt-users] getting name or uuid of vm within guest OS
by Behrooz 21 Jun '12

21 Jun '12

Hi, for tl;dr people: how we can get uuid or name of a vm within a guest os? description: We are trying to implement a guest-agent for Archipel* to let us run simple commands on guest os**. in archipel each vm has its own jid (jabber id), user will open a chat conversation to vm's jid and send messages like "!exec ls", then we check that user (jid) who sent !exec has permission to run commands on our guest. if he/she had permission we will send a message to jid of guest-agent with message "ls", guest-agent will run command then will send result to vm's jid and we tunnel result to user. now problem is that we don't know (in guest-agent) that what xmpp server we should connect to and what jid is trusted to recieve command from. xmpp server is running on hypervisor and trusted jid is {uuid-of-jvm}(a)hypervisor.com. right now we've used internal dhcp to set hostname of guest os to something like "uuid-of-jvm.hypervisor.com" using this switch (qemu): -net user,hostname=uuid-of-jvm.hypervisor.com it works but it's not best solution as it only works with qemu and we need a solution that works with other virtualization platforms that libvirt supports. * https://github.com/ArchipelProject/ ** yes, we know about vnc / ssh / ... but by implementing such thing we can add cool stuff in archipel like status of services that are running on guest os. -- regards, behrooz

2 3

[libvirt-users] How to obtain guest's monthly internet bandwidth usage?
by Tony Huang 21 Jun '12

21 Jun '12

Hello, I want to monitor the outgoing and incoming monthly internet usage. How can I do that? -- Tony

2 1

[libvirt-users] update virDomainDef with xml config
by xuanmao_001 20 Jun '12

20 Jun '12

Libvirt Version: 0.9.8 Hi: I added a new api for qemu_driver. and both added libvirt.c and remote. I tested it and it worked well. the function of this new api was add a new field in xml config of domain. (I added it like qemudDomainSetMemoryFlags)at the same time, I added a new member to struct virDomainDef. then I tested xml config converted to virDomaindef and virDomainDef converted to xml config both well(just tested this new api). But there was a problem, if I change the memory size or cpu number then apply it with virtManager. the xml config was changed. but there is no field in the xml what I added. I guest the virDomainDef member in virDomainObjPtr wasn't update. I have no idea, can you give me some ideas? thanks! here is my code in qemu_driver.c: static int qemudDomainSetCustomOptions(virDomainPtr dom, char *opt) { struct qemud_driver *driver = dom->conn->privateData; virDomainObjPtr vm; virDomainDefPtr persistentDef = NULL; int ret = -1; qemuDriverLock(driver); vm = virDomainFindByUUID(&driver->domains, dom->uuid); qemuDriverUnlock(driver); if (!vm) { char uuidstr[VIR_UUID_STRING_BUFLEN]; virUUIDFormat(dom->uuid, uuidstr); qemuReportError(VIR_ERR_NO_DOMAIN, _("no domain with matching uuid '%s'"), uuidstr); goto cleanup; } if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0) goto cleanup; if (!vm->persistent) { qemuReportError(VIR_ERR_OPERATION_INVALID, "%s", _("cannot change persistent config of a transient domain")); goto endjob; } if (!(persistentDef = virDomainObjGetPersistentDef(driver->caps, vm))) goto endjob; sa_assert(persistentDef); persistentDef->running_mode = opt; ret = virDomainSaveConfig(driver->configDir, persistentDef); ret = 0; endjob: if (qemuDomainObjEndJob(driver, vm) == 0) vm = NULL; cleanup: if (vm) virDomainObjUnlock(vm); return ret; } xuanmao_001

2 1

[libvirt-users] caps->nguests == 0?
by Zhihua Che 20 Jun '12

20 Jun '12

hi, I compiled the libvirt-0.9.10 and started the libvirtd with sudo. Unfortunately, I got an Error, saying 'virDomainDefParseXML unknown OS type hvm'. I debugged it and found in function virCapabilitiesSupportsGuestOSType, the parameter caps->nguests is 0. On the other hand, I tried start the libvirtd with common user, and creating domain with virsh, i found the caps->ngusts is 2 and had one value 'hvm', so it didn't complain the error above, instead, it complained could not load PC BIOS bios.bin. I'd say I searched a lot and people say it's caused by without loading kvm and kvm-intel module. So, I checked and it is loaded. Any tips here?

3 4

[libvirt-users] unsupported configuration: Reboot is not supported with this QEMU binary
by Xing.x.Gao 19 Jun '12

19 Jun '12

Hello, when i use virsh to reboot a guest,it report a "unsupported configuration: Reboot is not supported with this QEMU binary" error . my libvirt version 0.9.10 and i've tried 0.9.11/12 ,the debug info is in the attachment libvirtd.log, virsh # version --daemon Compiled against library: libvir 0.9.10 Using library: libvir 0.9.10 Using API: QEMU 0.9.10 Running hypervisor: QEMU 0.14.0 Running against daemon: 0.9.10 virsh # list Id Name State ---------------------------------------------------- 6 win7 running 7 f16 running virsh # reboot f16 error: Failed to reboot domain f16 error: unsupported configuration: Reboot is not supported with this QEMU binary thanks.

4 7

[libvirt-users] How to update the QEMU of libvirt?
by GaoYi 18 Jun '12

18 Jun '12

Hi all, I type "version" and the virsh outputs: Compiling library: libvir 0.6.3 ... Management: QEMU 0.9.1 Now I wanna update the QEMU to qemu-kvm-0.14.0. I don't know how to. Can anybody provide any help? Yi

2 1

[libvirt-users] How to set cpu limits to xen domU in libvirt
by Tony Huang 18 Jun '12

18 Jun '12

Hello, I looked in the the documents. Looks like the <cputune> period and quota will only support qemu driver. Of for xen user, how to set the hard cpu limit? -- Tony

3 2

Re: [libvirt-users] [Qemu-devel] How to management KVM virtual machines via libvirt?
by 陳韋任 (Wei-Ren Chen) 18 Jun '12

18 Jun '12

CC'ed to libvirt-users. On Sat, Jun 16, 2012 at 07:00:59PM +0800, GaoYi wrote: > Hi all, > > I am trying to management the VMs created by KVM commandline. However, I > found the libvirt cannot connect to the VMs or manage it from virsh. Can > anybody provide any help? > Best, Shouldn't this go to libvirt mailing list? http://libvirt.org/contact.html Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667 Homepage: http://people.cs.nctu.edu.tw/~chenwj

2 1

[libvirt-users] question regarding CMPIObjectPath
by Ashish Dalela 14 Jun '12

14 Jun '12

Folks, I'm a new user and I'm trying to build a standalone application using libvirt-cim (rather than use a full-fledged CIMOM). I need some help. While calling the CMPIInstanceMI->ft->enumerateInstances, I need to pass a reference to CMPIObjectPath. My application is crashing because I don't know what is the correct constructor for this. If I do ref = CMPIObjectPath () then all the FT pointers are null. Can someone please guide me on how to construct CMPIObjectPath instance before passing to enumerateInstances? Thanks much Ashish

2 1

[libvirt-users] can not connect hypervisor using libvirt-0.9.11 on windows
by xuteng 14 Jun '12

14 Jun '12

Hi,ALL: I compiled the libvirt-0.9.11 source code with mingw on windows according to the website: https://github.com/photron/msys_setup Then I wrote a simple test case ,as below: #include <stdio.h> #include <stdlib.h> #include "libvirt/libvirt.h" int main(int argc,char **argv) { virConnectPtr conn; conn = virConnectOpen("qemu+tcp://192.168.1.6/system"); if (conn = NULL) { fprintf(stderr,"Failed to open connection to qemu+tcp://192.168.1.6/system"); return 1; } virConnectClose(conn); return 0; } When linked to the dll just compiled , it came out with error : NOTE: you should run 'diskperf -y' to enable the disk statistics libvir: RPC error : Unable to set close-on-exec flag: No such file or directory libvir: error : invalid connection pointer in virConnectClose When using gdb to debug the testcase , break the function virConnectOpen , then step ,the error info was: Program received signal ?,Unknown signal. 0x7c92e4ff in ntdll!LdrAlternateResourcesEnabled () from C:\WINDOWS.0\system32\ntdll.dll Any suggestion would be appreciated ! Best Regards! xuteng via foxmail

1 0

[libvirt-users] Reconnection problem with a USB device
by Dale Amon 14 Jun '12

14 Jun '12

This is going to be a bit off the wall as I doubt many people are using a VM in quite the same manner as I am in this case. I have a new scanner at home, a Mustek A3USB 1200 Pro, which requires a vendor supplied version of libsane to run. That is a pain in the behind just to start with. To use that scanner requires a 32b machine with sufficiently old versions of various libraries. My primary machine, a laptop, is 64b and runs current software. So, in order to use my inexpensive large format scanner, I had to set up a 32b VM on my laptop that is running an old linux. I tunneled the USB device to it: <hostdev mode='subsystem' type='usb' managed='no'> <source> <vendor id='0x055f'/> <product id='0x040b'/> <address bus='3' device='8'/> </source> <alias name='hostdev0'/> </hostdev> That works fine... until I have to go into the office. Once I disconnected the USB go away for 10 hours and come back, it fails to re-engage. The USB seems to get grabbed up by the laptop itself instead of the VM. The only way to get it to work again is to halt the VM and do a cold boot of it. This is annoying to say the least because I lose 'state' when I boot, ie the set of windows and files open that remind me of where I left off on a project before going to work. Any suggestions how to get around this annoying issue?

2 4

[libvirt-users] What's the most recent compatible libvirt and qemu-kvm?
by Whit Blauvelt 13 Jun '12

13 Jun '12

Figured I'd test qemu-kvm-1.0.1 and libvirt-0.9.12, but the result after default compiles is: root@black:/usr/local/sbin# ./libvirtd 2012-06-12 19:53:41.894+0000: 6076: info : libvirt version: 0.9.12 2012-06-12 19:53:41.894+0000: 6076: warning : ebiptablesDriverInit:4084 : Could not find 'ebtables' executable 2012-06-12 19:53:42.675+0000: 6076: error : qemuCapsComputeCmdFlags:1209 : unsupported configuration: this qemu binary requires libvirt to be compiled with yajl 2012-06-12 19:53:42.677+0000: 6076: error : virDomainDefParseXML:8312 : internal error No guest options available for arch 'x86_64' Is it just the "yajl" thing missing, or is this combo just not to be expected to work? Also, should http://libvirt.org/compiling.html mention "yajl"? Thanks, Whit

4 5

[libvirt-users] How can a bridge be optimized?
by Whit Blauvelt 13 Jun '12

13 Jun '12

Hi, Netperf tells me that a KVM VM using a bridged connection to a system across the Gigabit LAN sees on average about 1/10th of the bandwidth the host sees. This is on very lightly loaded hosts, although with multiple low-use VMs. I've tried adjusting the CPU throttling after seeing that mentioned as a possible factor in slowing down a bridge, but it has not much if any effect here. Is there a good guide somewhere to what might make a difference with this? I recall the kernel recently adding a new alternative for handling VM interfaces, but can't recall what it was called. Would that be a marked improvement? Is it supported by libvirt? Thanks, Whit

6 17

[libvirt-users] Libvirt hangs until service is stopped and started again
by Ananth 13 Jun '12

13 Jun '12

Hi, The connection to libvirt seems to be hanging until the service is stopped and started again. But when i checked the status of libvirtd service (on Centos) and libvirt-bin service (on Ubuntu), service is still running. But any new connections and existing connections remain hung.I am using 0.9.4 version of libvirt on both the machines. I also found the following links reporting the same issue. https://bugzilla.redhat.com/show_bug.cgi?id=796451 http://www.redhat.com/archives/libvir-list/2009-June/msg00434.html Is this a known problem or is there a solution for this issue? Kindly let me know if there is a work around to avoid libvirt from hanging. Thank you. -- Regards Ananth

1 0

Re: [libvirt-users] How can a bridge be optimized?
by Whit Blauvelt 12 Jun '12

12 Jun '12

On Tue, Jun 12, 2012 at 11:35:28AM +0400, Andrey Korolyov wrote: > Just a stupid question: did you pin guest vcpus or NIC` hw queues? > Unpinned vm may seriously affect I/O performance when running on same > core set as NIC(hwraid/fc/etc). Thanks. No question is stupid. Obviously, this shouldn't be so slow at VM I/O so I'm missing something. In my defense, there is no single coherent set of documents on this stuff, unless those are kept in a secret place. It would be a fine thing if a few of the people who know all the "obvious" stuff about libvirt-based KVM configuration would collaborate and document it fully somewhere. When I Google "pinned vcpu" all the top responses are about Xen. I run KVM. I find mention that "KVM uses the linux scheduler for distributing workload rather than actually assigning physical CPUs to VMs," at http://serverfault.com/questions/235143/can-i-provision-half-a-core-as-a-vi…. Is that wrong? Are you suggesting RAID will end up on one CPU core, and if the VM ends up on the same core there's I/O trouble? I can see that for software RAID. But we're running hardware RAID. Isn't that handled in the hardware of the RAID controller? Isn't that the point of hardware RAID, to keep it off the CPU? In any case the slow IO is true of all the VMs, so presumably they're properly spread out over CPU cores (of which there are more than VMs, and each VM is configured to take only one), which would rule out the general problem being the shared use of any one core by other system processes. Whit

4 3

Re: [libvirt-users] How can a bridge be optimized
by Whit Blauvelt 12 Jun '12

12 Jun '12

On Tue, Jun 12, 2012 at 11:35:28AM +0400, Andrey Korolyov wrote: > Just a stupid question: did you pin guest vcpus or NIC` hw queues? > Unpinned vm may seriously affect I/O performance when running on same > core set as NIC(hwraid/fc/etc). Thanks. No question is stupid. Obviously, this shouldn't be so slow at VM I/O so I'm missing something. In my defense, there is no single coherent set of documents on this stuff, unless those are kept in a secret place. It would be a fine thing if a few of the people who know all the "obvious" stuff about libvirt-based KVM configuration would collaborate and document it fully somewhere. When I Google "pinned vcpu" all the top responses are about Xen. I run KVM. I find mention that "KVM uses the linux scheduler for distributing workload rather than actually assigning physical CPUs to VMs," at http://serverfault.com/questions/235143/can-i-provision-half-a-core-as-a-vi…. Is that wrong? Are you suggesting RAID will end up on one CPU core, and if the VM ends up on the same core there's I/O trouble? I can see that for software RAID. But we're running hardware RAID. Isn't that handled in the hardware of the RAID controller? Isn't that the point of hardware RAID, to keep it off the CPU? In any case the slow IO is true of all the VMs, so presumably they're properly spread out over CPU cores (of which there are more than VMs, and each VM is configured to take only one), which would rule out the general problem being the shared use of any one core by other system processes. Whit

1 0

[libvirt-users] ruby-libvirt connection stays open
by "Gergely Pál - night[w]" 12 Jun '12

12 Jun '12

Hi, I have a problem regarding the Ruby bindings of Libvirt. The sort summary is that the connection does not closed properly when I have retrieved a domain from it. The small sample code is the following (I use irb for easy reading of return values): The working connection closing (when I do nothing with the connection): 1.9.3p125 :001 > require 'libvirt' => true 1.9.3p125 :002 > conn = Libvirt::open('qemu+ssh://localhost/system') => #<Libvirt::Connect:0x00000001a40c30> 1.9.3p125 :003 > conn.close => nil 1.9.3p125 :004 > conn.closed? => true (Note: I know I should not use ssh for localhost, it's just a test, in general we use different remote hosts for this, so ssh is needed.) In this case there is no connection left open. But look at this code: 1.9.3p125 :001 > require 'libvirt' => true 1.9.3p125 :002 > conn = Libvirt::open('qemu+ssh://localhost/system') => #<Libvirt::Connect:0x00000001af3d80> 1.9.3p125 :003 > domain = conn.lookup_domain_by_name('gomboc18') => #<Libvirt::Domain:0x00000001adf0d8> 1.9.3p125 :004 > conn.close => nil 1.9.3p125 :005 > conn.closed? => true And i run a ps auxww there are the relevant processes: nightw 9241 0.2 0.3 88380 13256 pts/0 Sl+ 11:39 0:00 irb nightw 9248 0.0 0.0 41188 2772 pts/0 S+ 11:39 0:00 ssh localhost sh -c 'nc -q 2>&1 | grep "requires an argument" >/dev/null;if [ $? -eq 0 ] ; then CMD="nc -q 0 -U /var/run/libvirt/libvirt-sock";else CMD="nc -U /var/run/libvirt/libvirt-sock";fi;eval "$CMD";' root 9249 0.0 0.0 85752 3696 ? Ss 11:39 0:00 sshd: nightw [priv] nightw 9402 0.0 0.0 85752 1692 ? S 11:39 0:00 sshd: nightw@notty nightw 9403 0.0 0.0 4272 584 ? Ss 11:39 0:00 sh -c nc -q 2>&1 | grep "requires an argument" >/dev/null;if [ $? -eq 0 ] ; then CMD="nc -q 0 -U /var/run/libvirt/libvirt-sock";else CMD="nc -U /var/run/libvirt/libvirt-sock";fi;eval "$CMD"; nightw 9406 0.0 0.0 14136 472 ? S 11:39 0:00 nc -q 0 -U /var/run/libvirt/libvirt-sock And they remain open until i close irb (or the original ruby application on the real development system) Do you have any suggestions for solving this problem? Thanks, Pal

1 0

[libvirt-users] virsh: migration job: unexpectedly failed
by Xing.x.Gao 12 Jun '12

12 Jun '12

Hi,I am use virsh and test the migration command, on server.example.com: # rpm -qa|grep libvirt libvirt-0.9.10-21.el6.x86_64 libvirt-python-0.9.10-21.el6.x86_64 libvirt-client-0.9.10-21.el6.x86_64 # virsh version Compiled against library: libvir 0.9.10 Using library: libvir 0.9.10 Using API: QEMU 0.9.10 Running hypervisor: QEMU 0.14.1 #cat /etc/libvirt/libvirt.conf uri_aliases = [ "host1=qemu+ssh://root@host1.example.com/system", ] node1.example.com is the same version with server.example.com and on both server has the same storage pool with same path, first step,as use the local storage,i copied the vm win7's disk from server.example.com to node1.example.com's storage pool,and did a pool-refresh. 2nd step: on server.example.com i use this command to do the migration job: #virsh start win7 # virsh migrate win7 host1 --copy-storage-inc --persistent --live --unsafe when the migation process begin ,i can see the win7 appear on the node1.example.com whos status is paused,but just after a few secs,errs come out: (server.example.com) # virsh migrate win7 host1 --copy-storage-inc --persistent --live --unsafe error: operation failed: migration job: unexpectedly failed error: Reconnected to the hypervisor i've tried to solve this problem, but failed. thanks.

4 9

[libvirt-users] How to list and change domain's disk image file
by Ricardo Hillbrecht 12 Jun '12

12 Jun '12

Hi I'm writing a C program using libvirt API and need to list the storage volumes used by each domain. I'm wondering if there is a way to do this better of searching the XML strings of all domains, does anyone can suggest me something ? I also need to create a function to change the img file of a given domain. I intend to do the following: 1. virDomainGetXMLDesc (domain) 2. change the XML to other img file 3. virDomainUndefine (domain) 4. virDomainCreateXML (changed XML) Am i correct doing this ? There is a better method ? Thanks Ricardo

2 2

[libvirt-users] A RFE for libvirt
by Sebastien Douche 08 Jun '12

08 Jun '12

On Thu, Jun 7, 2012 at 12:38 AM, Eric Blake <eblake(a)redhat.com> wrote: > I personally find it easier to use virt-manager or virt-install or > gnome-boxes to create an initial guest template, then to modify that XML > for any final tweaks before using the guest in earnest. Right, but the lack of provisioning is a huge miss. Before to use a remote tool (libvirt), you must 1/ connect on the remote machine, 2/ create a xml file and 3/ define the domain. > how easy it would be to add guest templating directly into libvirt, nor > whether it would be duplicating effort that has already been coded > elsewhere. Integrating virt-install & virt-clone would be imho very good start point. -- Sebastien Douche <sdouche(a)gmail.com> Twitter: @sdouche / G+: +sdouche

1 0

[libvirt-users] A RFE for libvirt
by whuang 07 Jun '12

07 Jun '12

Hi, I am a libvirt user , there is a requirement about libvirt : I need a virsh cmd like "#virsh *create-as* --disk --net " to create a very sample guest I have not xml file and I think it's a little hard for me to create a NEW xml for libvirt , so I need a virsh cmd like "vol-create-as " help me do that. I know there are a lot of options for creating a guest , I just need --disk and --net options , others libvirt can set a defaut value . I just want an easy way to create a guest :> Wenlong -- Best Regards! Wenlong Huang IRC Account: wenlong Phone: 62608117 / 15011214521

4 6

[libvirt-users] Fine grained authorisation
by Sam Wilson 07 Jun '12

07 Jun '12

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Hi List, I am trying to provide a solution using KVM on RHEL for a number of technical staff sharing server resources. We would like to be able to "restrict" a number of guests from certain users to follow the principle of least privilege. So in short, is there a way of defining access to individual guests via libvirt / polkit or is read only / read write the best we can expect for the foreseeable future? Cheers, Sam -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iF4EAREIAAYFAk/QWhsACgkQFdt86iEfl/cYagD9FGktnsqyGkfzXWkUyFtJmQc2 VX6ZG2iXmKD75R7c6IgA/j5WvnsXdBA6jPO9/WnX83CmmorPc9oRN6lpYTxXgkON =38VZ -----END PGP SIGNATURE-----

2 1

Re: [libvirt-users] The default location of vm snapshots
by SimpleCloud 07 Jun '12

07 Jun '12

Thanks a lot for the details. From http://wiki.libvirt.org/page/Snapshots, we have to pause the domain before taking snapshot and resume after. Is there any way to do "live" snapshotting for running domain or reduce pause time? Thanks, Lei ------------------ Original ------------------ From: "Eric Blake"<eblake(a)redhat.com>; Date: Wed, Jun 6, 2012 08:24 PM To: "SimpleCloud"<simplecloud(a)qq.com>; Cc: "libvirt-users"<libvirt-users(a)redhat.com>; Subject: Re: [libvirt-users] The default location of vm snapshots On 06/06/2012 03:20 AM, SimpleCloud wrote: > Hi all, > > > Where could I find the memory dump and disk snapshots for vm after command "virsh snapshot-create <some_running_vm>"? Thanks in advance. This particular form of snapshot is called the 'system checkpoint' snapshot, and the current qemu implementation is that the snapshot creates internal snapshots in your qcow2 files. If you do 'qemu-img info $path_to_img', you will see the disk snapshots listed as internal snapshots for each image associated with the domain, as well as the first qcow2 file also having memory associated with the internal snapshot. > > > I found the xml files in /var/lib/libvirt/qemu/snapshot/, but hava no idea about the raw snapshot file. Looking in /var/lib/libvirt is generally unsupported (that is an internal libvirt detail, and subject to change in future releases). The only way to safely look at the snapshot XML is via the API (virDomainSnapshotGetXMLDesc, which is wrapped by 'virsh snapshot-dumpxml'). I am also hoping to submit a patch that will allow you the option to create an external snapshot rather than using qcow2 internal snapshots, but that's not in the code base yet. -- Eric Blake eblake(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

3 3

[libvirt-users] qemu-img snapshots with backing stores?
by Sean Abbott 07 Jun '12

07 Jun '12

So, I was attempting to use qemu snapshots with backing stores. The QEMU docs (http://wiki.qemu.org/Documentation/CreateSnapshot) make it sound like you simply point your qemu at the snapshot after it's creation, and you're golden. When attempting this with libvirt, though, it fails. I created a snapshot using the above tutorial. the resulting file is disk.0, and a qmeu-img info on it returns: image: disk.0 file format: qcow2 virtual size: 29G (31457280000 bytes) disk size: 140K cluster_size: 65536 backing file: /var/lib/one/public/lin_client_current.qcow2 (actual path: /var/lib/one/public/lin_client_current.qcow2) So that all looks groovy, right? Then, I created (via opennebula) an xml deployment file like so: http://paste.ubuntu.com/1027145/ When I attempt to do a virsh create, I get the following errors: virsh # create deployment.0 error: Failed to create domain from deployment.0 error: internal error process exited while connecting to monitor: file=/var/lib/one/vm/56/images/disk.0,if=none,id=drive-virtio-disk0,boot=on,format=qcow2,cache=none qemu-kvm: boot=on|off is deprecated and will be ignored. Future versions will reject this parameter. Please update your scripts. qemu-system-x86_64: -drive file=/var/lib/one/vm/56/images/disk.0,if=none,id=drive-virtio-disk0,boot=on,format=qcow2,cache=none,boot=on: could not open disk image /var/lib/one/vm/56/images/disk.0: Invalid argument So...something isn't working. Is it possible to do this, or should I give up on this path? Thanks! sean

2 6

[libvirt-users] The default location of vm snapshots
by SimpleCloud 06 Jun '12

06 Jun '12

Hi all, Where could I find the memory dump and disk snapshots for vm after command "virsh snapshot-create <some_running_vm>"? Thanks in advance. I found the xml files in /var/lib/libvirt/qemu/snapshot/, but hava no idea about the raw snapshot file. Thanks, Lei

2 1

[libvirt-users] [Fwd: error: this function is not supported by the connection driver : virConnectNumOfStoragePool]
by Onkar 05 Jun '12

05 Jun '12

Hello All, Any idea on this issue ? Regards, Onkar -------- Forwarded Message -------- From: Onkar <kernzap(a)gmail.com> To: libvir-list <libvir-list(a)redhat.com> Subject: error: this function is not supported by the connection driver : virConnectNumOfStoragePool Date: Wed, 30 May 2012 21:29:42 +0530 Hello, I configured libvirt like this ./configure --prefix=/ --exec-prefix=/usr/ --libdir=/usr/lib64/ --with-storage-dir --with-storage-dir --with-storage-dir --with-storage-dir --with-storage-dir --with-storage-dir --with-storage-dir --with-storage-dir --with-qemu --with-libvirtd --with-selinux --with-network --with-libblkid and then, make -j4 make install and then # virsh list --all Id Name State ---------------------------------------------------- - vm1 shut off # virsh pool-list --all error: Failed to list active pools error: this function is not supported by the connection driver: virConnectNumOfStoragePools getting this error , any clues on why is this error ? Regards, Onkar

4 4

[libvirt-users] converting save/dump output into physical memory image
by Andrew Tappert 04 Jun '12

04 Jun '12

A lot of people in the security community, myself included, are interested in memory forensics these days. Virtualization is a natural fit with memory forensics because it allows one to get access to a guest's memory without having to introduce any extra software into the guest or otherwise interfere with it. Incident responders are particularly interested in getting memory dumps from systems they're investigating. Virsh has "save" and "dump" commands for storing the state of a guest to a file on disk, but memory of KVM guests doesn't get saved in the "standard" input format for memory forensics tools, which is a raw physical memory image. (This is what you'd get via the classical "dd /dev/mem" approach or the contemporary equivalent using the crash driver; and VMware Server and Workstation produce .vmem files, which are such raw physical memory images, when a guest is paused or snapshotted.) In order to analyze the memory of Libvirt/KVM guests with my Linux memory forensics software, Second Look, I've created a tool for converting Libvirt-QEMU-save files (output of virsh save command) or QEMU-savevm files (output of virsh dump command) to raw physical memory images. I've got a basic working capability, though I'm still tracking down some problems with a guest allocated 8GB RAM--not all the memory seems to be present in the save or dump file. And I haven't tested very extensively yet, version support is limited to what I myself am currently running, etc. I'd like to know if this is a capability that others are interested in. Is this something that would be of interest to the Libvirt project if I were to contribute the code, or to the KVM project, or do you think it best exists as a separate project? I've also got a proof-of-concept tool for converting hibernate images to raw physical memory images. Perhaps a collection of tools for converting various memory dump formats would be a good project. Anyone else interested in this kind of stuff? As an author of commercial memory forensics software I've got a vested interest in availability of good memory acquisition capabilities. But there are a number of people working on FOSS Linux memory analysis tools, too... Andrew

4 5

[libvirt-users] guest fails to start: Error initializing virtio-net-pci
by Ekkard Gerlach 03 Jun '12

03 Jun '12

Hi, squeeze host, winxp guest. guest fails to start: PCI: devfn 24 not available fpr virtio-net-pci, in use by virtio-blk-pci Error initializing virtio-net-pci xml-File: ======== <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/winxp'/> <target dev='hda' bus='ide'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> this added: <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/winxp-d'/> <target dev='hdb' bus='virtio'/> <address type='drive' controller='0' bus='0' unit='1'/> </disk> root@squeeze64:~# lsmod | grep virt virtio_balloon 2961 0 virtio_net 10573 0 virtio_blk 4225 0 virtio_pci 5511 0 virtio_ring 3258 1 virtio_pci virtio 3309 4 virtio_balloon,virtio_net,virtio_blk,virtio_pci root@squeeze64:~# dpkg -l | egrep "kvm|qemu|virt" ii etherboot-qemu 5.4.4-9 Bootstrapping for various network adapters (qemu) ii gvfs 1.6.4-3 userspace virtual filesystem - server ii kvm 1:0.12.5+dfsg-5+squeeze8 dummy transitional package from kvm to qemu-kvm ii libvirt-bin 0.8.3-5+squeeze2 the programs for the libvirt library ii libvirt0 0.8.3-5+squeeze2 library for interfacing with different virtualization systems ii python-libvirt 0.8.3-5+squeeze2 libvirt Python bindings ii qemu 0.12.5+dfsg-3squeeze1 fast processor emulator ii qemu-keymaps 0.12.5+dfsg-3squeeze1 QEMU keyboard maps ii qemu-kvm 0.12.5+dfsg-5+squeeze8 Full virtualization on x86 hardware ii qemu-system 0.12.5+dfsg-3squeeze1 QEMU full system emulation binaries ii qemu-user 0.12.5+dfsg-3squeeze1 QEMU user mode emulation binaries ii qemu-utils 0.12.5+dfsg-3squeeze1 QEMU utilities ii virt-manager 0.8.4-8 desktop application for managing virtual machines ii virt-viewer 0.2.1-1 Displaying the graphical console of a virtual machine ii virtinst 0.500.3-2 Programs to create and clone virtual machines I sucessfully added a virtio NIC: <interface type='bridge'> <mac address='52:54:00:a6:fb:ab'/> <source bridge='br0'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> an I installed the driver from red hat "virtio-win-0.1-22.iso". But adding a virtio disk fails. any ideas? Ekkard

1 0

[libvirt-users] PCI Passthrough, AMD, fails to initialize
by Chris Sanders 03 Jun '12

03 Jun '12

I'm looking for assistance with pci-passthrough on CentOS 6.2. I've installed libvirt version: 0.9.4, package: 23.el6_2.8 from yum. I have a windows XP client setup via virt-manager which boots and runs fine until I attempt to assign a PCI device to it. The error log reads: -----------------/var/log/libvirt/qemu/SageTv.log---------------- 2012-06-02 22:55:07.801: starting up LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=spice /usr/libexec/qemu-kvm -S -M rhel6.2.0 -cpu Opteron_G3,+wdt,+skinit,+osvw,+3dnowprefetch,+cr8legacy,+extapic,+cmp_legacy,+pdpe1gb,+fxsr_opt,+mmxext,+aes,+sse4.2,+sse4.1,+ssse3,+ht,+vme -enable-kvm -m 3048 -smp 2,sockets=2,cores=1,threads=1 -name SageTv -uuid bf80f6a5-1471-9415-e502-88c4999319c7 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/SageTv.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime,driftfix=slew -no-shutdown -boot order=c,menu=on -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive file=/dev/vg_hdd/lv_sagetv,if=none,id=drive-virtio-disk0,format=raw,cache=none,aio=native -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=24,id=hostnet0,vhost=on,vhostfd=25 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:b9:bf:b0,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -usb -device usb-tablet,id=input0 -spice port=5900,addr=127.0.0.1,disable-ticketing -vga std -device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device pci-assign,host=04:07.0,id=hostdev0,configfd=26,bus=pci.0,addr=0x8 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 char device redirected to /dev/pts/1 do_spice_init: starting 0.8.3 spice_server_add_interface: SPICE_INTERFACE_MIGRATION spice_server_add_interface: SPICE_INTERFACE_KEYBOARD spice_server_add_interface: SPICE_INTERFACE_MOUSE spice_server_add_interface: SPICE_INTERFACE_PLAYBACK spice_server_add_interface: SPICE_INTERFACE_RECORD Failed to assign device "hostdev0" : Invalid argument qemu-kvm: -device pci-assign,host=04:07.0,id=hostdev0,configfd=26,bus=pci.0,addr=0x8: Device 'pci-assign' could not be initialized 2012-06-02 22:55:08.744: shutting down -----------------/var/log/libvirt/qemu/SageTv.log---------------- After this I find the dmesg shows: -----------------dmesg------------------ pci-stub 0000:04:07.0: PCI INT A -> GSI 21 (level, low) -> IRQ 21 pci-stub 0000:04:07.0: restoring config space at offset 0x1 (was 0x2100000, writing 0x2100002) assign device 4:7.0 failed -----------------dmesg------------------ In case this was an IRQ problem I checked my /proc/interrupts. -----------------interrupts------------------ CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 0: 130 0 0 0 0 0 0 0 IO-APIC-edge timer 1: 0 0 1 1 0 0 0 0 IO-APIC-edge i8042 8: 0 1 0 0 0 0 0 0 IO-APIC-edge rtc0 9: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi acpi 17: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb1, ehci_hcd:usb2, ehci_hcd:usb3 18: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi ohci_hcd:usb4, ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7 19: 587 2219 1807 588 602 600 687 607 IO-APIC-fasteoi ahci 21: 422 430 7316 402 410 405 429 412 IO-APIC-fasteoi 24: 0 0 0 0 0 0 0 0 PCI-MSI-edge AMD-Vi 25: 12 10 9 20 11 15 15 15 PCI-MSI-edge radeon 26: 7 8 7 10 9 8 10 9 PCI-MSI-edge hda_intel 27: 0 0 0 0 0 0 0 0 PCI-MSI-edge xhci_hcd 28: 7098 36221 19 24 19 20 28 20 PCI-MSI-edge eth0 NMI: 0 0 0 0 0 0 0 0 Non-maskable interrupts LOC: 22088 22355 9472 12483 6371 11086 5211 7987 Local timer interrupts SPU: 0 0 0 0 0 0 0 0 Spurious interrupts PMI: 0 0 0 0 0 0 0 0 Performance monitoring interrupts PND: 0 0 0 0 0 0 0 0 Performance pending work RES: 61166 42503 6683 11920 2681 3534 4120 2460 Rescheduling interrupts CAL: 197 302 301 303 290 300 314 318 Function call interrupts TLB: 1406 1551 464 1749 350 897 485 563 TLB shootdowns TRM: 0 0 0 0 0 0 0 0 Thermal event interrupts THR: 0 0 0 0 0 0 0 0 Threshold APIC interrupts MCE: 0 0 0 0 0 0 0 0 Machine check exceptions MCP: 1 1 1 1 1 1 1 1 Machine check polls ERR: 0 MIS: 0 -----------------interrupts------------------ To get to this point I've confirmed IOMMU is loading on boot. during boot a grep for AMD-Vi returns: -----------------AMD-Vi------------------ AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40 AMD-Vi: Initialized for Passthrough Mode AMD-Vi: Enabling IOMMU at 0000:00:00.2 cap 0x40 -----------------AMD-Vi------------------ I've set: allow_unsafe_assigned_interrupts. I've set selinux to permissive I've set user and group for qemu to 'root' I've set clear_emulator_capabilites = 0 I've set relaxed_acs_check = 1 Finally, if there's a better forum to ask this question in please let me know. I've already tried #kvm and #virt on IRC with no reply yet. I've tried the CentOS 6.2 forums with no reply. Thanks, Chris P.S. I didn't subscribe, just sent this email. If by some odd chance, I can't see replies w/o subscribing someone please let me know. (sanders.chris(a)gmail.com)

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[libvirt-users] Resize qcow2 disks
by Javi Legido 01 Jun '12

01 Jun '12

Good morning. I already tried: 1. http://michael.orlitzky.com/articles/resizing_a_kvm_or_qemu_disk_image.php Result: OS system can't see the disk space sudo qemu-img resize /var/lib/libvirt/images/mysql-1.qcow2 +8G ls -lath /var/lib/libvirt/images/mysql-1.qcow2 -rw------- 1 libvirt-qemu kvm 10G jun 1 15:35 /var/lib/libvirt/images/mysql-1.qcow2 # pvresize /dev/vda5 Physical volume "/dev/vda5" changed 1 physical volume(s) resized / 0 physical volume(s) not resized # lvextend -L8G /dev/template/root Extending logical volume root to 8.00 GiB Insufficient free space: 1630 extents needed, but only 0 available 2. http://blog.wpkg.org/2010/10/04/resizing-qcow2-images/ Result: OS system can't see the disk space My 3rd option is to install libguestfs-tools package, but I would like to avoid it since it's not part of Debian release. Any good step by step guide to enlarge a qcow2 + LVM virtual disk? Thanks

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[libvirt-users] The LXC container propagate the ro remount to the host mount point
by Sebastien Douche 01 Jun '12

01 Jun '12

Hi, every so often (cannot determine when it occurs at this time), the VM remount in read only the host partition (/srv here). Is it a bug? A misconfiguration? My config: <filesystem type='mount' accessmode='passthrough'> <source dir='/srv/lxc/lib/vprobe10/rootfs'/> <target dir='/'/> </filesystem> -- Sebastien Douche <sdouche(a)gmail.com> Twitter: @sdouche / G+: +sdouche

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[libvirt-users] Image booted using libvirt with --arch=i686 gives a message: Kernel detected only i486 CPU
by Georgy Sebastian Pullolickal 01 Jun '12

01 Jun '12

I tried booting a gentoo image I had created using the command virt-install --name=test --ram=512 --vcpus=1 --import --os-type=Linux --arch=i686 --disk path=/vms/test.qcow2,format=qcow2 --graphics vnc,port=5910,listen=0.0.0.0,password=test123 --network bridge=virbr0 --noautoconsole --description --autostart However even though the architecture is specified as i686, the image does not boot. It gives a message This kernel requires an i586 CPU, but only detected an i486 CPU. Unable to boot- please use a kernel appropriate for your CPU. The created libvirt profile xml can be found at Pastebin test.xml<http://pastebin.ca/2156937> I am able to boot it directly using qemu --enable-kvm I am at a loss about what could be causing such an issue?? Additionally is there by which I can pass additional parameters to qemu using libvirt? I understand that it is possible to pass the arguments by modifying the domain xml, but is there any way to do the same though command line? For my current work, I need to use a custom version of qemu with custom arguments. -- Regards Georgy

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[libvirt-users] Reg: Info on memory usage from within LXC.
by Alphonse Hansel Anthony 01 Jun '12

01 Jun '12

Hi All, Is it possible to report memory usage of a LXC, from within a LXC? Tools like #top, #free use /proc information and report back the host details. Is /proc namespace aware? Are there any other tools available to report memory usage from cgroups directly, but from within the container? Any info or pointers on this would be useful. Thanks, Alphonse

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[libvirt-users] NPIV setup?
by Jason Price 01 Jun '12

01 Jun '12

I'm missing something. The purpose of NPIV (as I understand it) is to give a guest OS an HBA that it can scan, play with new luns, etc all without making changes to the physical server(s) the guest is living in currently. However, I can't find a way to either have the guest's XML config create the HBA or for the physical server to successfully GIVE the HBA to the guest. I can give disks all day long, but I can't give the HBA to the guest. It seems like libvirt and virsh can only create the vHBA on the physical box, which defeats the purpose of working with NPIV then... I can just present the same luns to the REAL WWPNs of the physical boxes that need access, setup multipathd to give /dev/mapper names in a consistent manner, and give the raw disks to the guests. I really want to get the physical KVM servers out of the 'storage management' game aside from the basic OSes of the guests. How can I do that? (or am I missing something?) --Jason

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