May 2012 - Users - libvirt List Archives

[libvirt-users] release open_disk error
by Frido Roose 10 May '12

10 May '12

Hello, I wonder what the "open error -1" / "release open_disk error" messages in sanlock.log actually mean. I saw these messages in the log on a KVM host that rebooted, and after running "/usr/sbin/virt-sanlock-cleanup" on that host. The resources where disks from 2 guests running on another KVM host. So in fact the disks are still in use, bot got cleaned up by the other KVM host because it thought they were not longer in use... Several questions: 1. Could this indicate a problem with the lease of these resources on the server that host these guests? 2. Is there a way to reregister these resources, because they are still in use (but not for sanlock it seems)? 3. Overall, is it a bad idea to run virt-sanlock-cleanup? Some entries from the log file: 538 s1:r35 resource __LIBVIRT__DISKS__:e133401bfdff6979f76d9544ec8a5529:/var/lib/libvirt/sanlock/e133401bfdff6979f76d9544ec8a5529:0 for 1,9,4218 539 open error -1 /var/lib/libvirt/sanlock/e133401bfdff6979f76d9544ec8a5529 539 r35 release open_disk error /var/lib/libvirt/sanlock/e133401bfdff6979f76d9544ec8a5529 598 s1:r40 resource __LIBVIRT__DISKS__:fc82f9999b5afddb8aee9955db9b3477:/var/lib/libvirt/sanlock/fc82f9999b5afddb8aee9955db9b3477:0 for 2,12,4230 598 open error -1 /var/lib/libvirt/sanlock/fc82f9999b5afddb8aee9955db9b3477 598 r40 release open_disk error /var/lib/libvirt/sanlock/fc82f9999b5afddb8aee9955db9b3477 598 s1:r42 resource __LIBVIRT__DISKS__:ff9b82672a4dd869f9c9b38a6cbe3900:/var/lib/libvirt/sanlock/ff9b82672a4dd869f9c9b38a6cbe3900:0 for 2,12,4232 598 open error -1 /var/lib/libvirt/sanlock/ff9b82672a4dd869f9c9b38a6cbe3900 598 r42 release open_disk error /var/lib/libvirt/sanlock/ff9b82672a4dd869f9c9b38a6cbe3900 -- Frido Roose

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[libvirt-users] creating a domain
by John Wayne 10 May '12

10 May '12

hi, i am a bit confused on how to start an inactive domain using the python bindings, any help would be appreciated. (inactive as in the domain was created with virConnect.defineXML sometime in the past) looks like i have to use virDomain.create, however virDomain.create needs a defined domain xmldesc as a parameter and i am not sure on how to get that i guess if virConnect.create was happening right after virConnect.defineXML i could get the return value of virConnect.defineXML and pass that onto virDomain.create. however, since the domain was created sometime in the past, i am not sure on how to get the domain ptr which virDomain.create needs thanks

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[libvirt-users] Libvirt java binding crash Tomcat
by Hubert Zhang 09 May '12

09 May '12

Running on linux and libvirt 0.9.11. Using libvirt java 0.4.7. Notice that the Tomcat server crashes and shows the dump like this: *** glibc detected *** jsvc.exec: double free or corruption (out): 0x086f14a8 *** ======= Backtrace: ========= /lib/libc.so.6[0xc03745] /lib/libc.so.6(cfree+0x59)[0xc03b89] /tmp/jna/jna486823639517928939.tmp(Java_com_sun_jna_Native_free+0x1d)[0x430c4c] [0xb46de240] [0xb46d218d] [0xb46d218d] [0xb46d218d] [0xb46cf3e6] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x13bdb21] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x15b3478] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x13bd94f] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x13f0ef7] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x13d4aee] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/libjava.so(Java_java_lang_ref_Finalizer_invokeFinalizeMethod+0x6e)[0x11cb3e] [0xb46de240] [0xb46d218d] [0xb46d218d] [0xb46d218d] [0xb46cf3e6] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x13bdb21] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x15b3478] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x13bd395] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x13bd458] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x143fbe7] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x16b404f] /usr/lib/jvm/sun-java-6u24/jre/lib/i386/server/libjvm.so[0x15b4a6e] /lib/libpthread.so.0[0x8fa842] /lib/libc.so.6(clone+0x5e)[0xc6c4ce] ======= Memory map: ======== 00110000-00133000 r-xp 00000000 08:01 106948 /usr/lib/jvm/sun-java-6u24/jre/lib/i386/libjava.so 00133000-00135000 rw-p 00023000 08:01 106948 /usr/lib/jvm/sun-java-6u24/jre/lib/i386/libjava.so 00135000-00148000 r-xp 00000000 08:01 74629 /lib/libnsl-2.5.so 00148000-00149000 r--p 00012000 08:01 74629 /lib/libnsl-2.5.so 00149000-0014a000 rw-p 00013000 08:01 74629 /lib/libnsl-2.5.so 0014a000-0014c000 rw-p 00000000 00:00 0 0014c000-0014f000 ---p 00000000 00:00 0 0014f000-0019d000 rwxp 00000000 00:00 0 0019d000-001d7000 r-xp 00000000 08:01 106944 /usr/lib/jvm/sun-java-6u24/jre/lib/i386/libjdwp.so 001d7000-001d8000 rw-p 00039000 08:01 106944 /usr/lib/jvm/sun-java-6u24/jre/lib/i386/libjdwp.so 001d8000-001d9000 ---p 00000000 00:00 0 001d9000-00259000 rwxp 00000000 00:00 0 00259000-0026d000 r-xp 00000000 08:01 106885 /usr/lib/jvm/sun-java-6u24/jre/lib/i386/libnet.so 0026d000-0026e000 rw-p 00013000 08:01 106885 /usr/lib/jvm/sun-java-6u24/jre/lib/i386/libnet.so 0026e000-00273000 r-xp 00000000 08:01 106769 /usr/lib/jvm/sun-java-6u24/jre/lib/i386/headless/libmawt.so 00273000-00274000 rw-p 00004000 08:01 106769 /usr/lib/jvm/sun-java-6u24/jre/lib/i386/headless/libmawt.so 00276000-00290000 r-xp 00000000 08:01 74651 /lib/ld-2.5.so 00290000-00291000 r--p 00019000 08:01 74651 /lib/ld-2.5.so 00291000-00292000 rw-p 0001a000 08:01 74651 /lib/ld-2.5.so 00292000-00295000 ---p 00000000 00:00 0 00295000-002e3000 rwxp 00000000 00:00 0 002e3000-002e8000 r-xp 00000000 08:01 212038 /usr/lib/libwsman_curl_client_transport.so.1.0.0 002e8000-002e9000 rw-p 00004000 08:01 212038 /usr/lib/libwsman_curl_client_transport.so.1.0.0 ...................................... Sometimes I see "invalid pointer" as well. It seems a bug to the libvirt java API. Has anyone seen this error before? Thanks.

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[libvirt-users] SSH connection timeout
by Ananth 09 May '12

09 May '12

Hi, I am trying to connect to libvirt on KVM host from a remote python client, using the connection string "qemu+ssh://<IP Address>/system" If I setup password less SSH (Public key) between the machines, I am able to proceed with the connection. But If I have not setup the public key authentication, my code hangs trying to connect to libvirt, and there is a prompt for entering password in the shell where the code is running. Is there any way to catch this in an exception and throw an error that public key not setup or password not available? Or is it possible to timeout and abort the request to connect to the host? Whatever timeout variables available online seem to work only for an already active SSH session to timeout. Any pointers ? -- Regards Ananth

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[libvirt-users] Passing dhcp-options
by Michael Hierweck 09 May '12

09 May '12

Hi, I'm running some Windows clients inside KVM virtual maschines managed by libvirt. These clients are managed by a Samba 3 PDC. Therefore the DHCP needs so supply corresponding WINS server (dhcp option 44) not only IP address and DNS server. Is it possible to make dnsmasq driven by libvirt to supply custom dhcp options? I would appreciate something like this in the network.xml: [...] <dhcp> <range [...] /> <option key="key1">value1</option> <option key="key2">value2</option> [...] </dhcp> [...] Is there any other solution? Using DHCP to configure clients does not make sense when parts (WINS) of the IP configurations need to be hard coded in the clients. Thanks in advance Michael -- EDV-Serviceteam Annika & Michael Hierweck GbR Egerstraße 53, 44225 Dortmund (Germany) http://www.edv-serviceteam.net

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[libvirt-users] creation of storage volume fails
by John Wayne 08 May '12

08 May '12

hi, i am getting this error below when i try to create a storage volume: libvirt.virStoragePool.CreateXML(storagepoolobject,xmldesc,0) AttributeError: class virStoragePool has no attribute 'CreateXML' my code is: xmldesc="xml description of storage volume which i got from sudo virsh vol-dumpxml" #get a storage pool object to use in creating a volume storagepoolobject=libvirt.virConnect.storagePoolLookupByName(conn,'poolname') #now try to create the volume using the above storage pool object libvirt.virStoragePool.CreateXML(storagepoolobject,xmldesc,0) from python: -bash-4.1$ python >>> import libvirt >>> dir(libvirt.virStoragePool) ['UUID', 'UUIDString', 'XMLDesc', '__del__', '__doc__', '__init__', '__module__', 'autostart', 'build', 'connect', 'create', 'createXML', 'createXMLFrom', 'delete', 'destroy', 'info', 'isActive', 'isPersistent', 'listVolumes', 'name', 'numOfVolumes', 'refresh', 'setAutostart', 'storageVolLookupByName', 'undefine'] >>> help(libvirt.virStoragePool.createXML) Help on method createXML in module libvirt: createXML(self, xmldesc, flags) unbound libvirt.virStoragePool method Create a storage volume within a pool based on an XML description. Not all pools support creation of volumes from the libvirt.org documentation: http://libvirt.org/html/libvirt-libvirt.html#virStorageVolCreateXML virStorageVolPtrvirStorageVolCreateXML(virStoragePoolPtr pool, const char * xmldesc, unsigned int flags) Create a storage volume within a pool based on an XML description. Not all pools support creation of volumes pool:pointer to storage pool xmldesc:description of volume to create flags:extra flags; not used yet, so callers should always pass 0 Returns:the storage volume, or NULL on error

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[libvirt-users] Destroy VM failed.
by david_zhu 08 May '12

08 May '12

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[libvirt-users] list storage pools and volumes using python api calls
by Syed A. Ali 08 May '12

08 May '12

how do i list storage pools and volumes using the python bindings? basically the python api calls for virsh pool-list and virsh vol-list thanks

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[libvirt-users] libvirt read only connections upgraded to full access connections
by Doug Goldstein 07 May '12

07 May '12

I've gone through the docs and the API and I didn't see a way to do this but I wanted to confirm. My application gives a bunch of info on the state of a VM that's available through a connection created through libvirt.openReadOnly() but at some point the user might want to restart the VM let's say. This requires a full privilege connection, rather than opening a new connection I was hoping to upgrade the existing one to a full privilege connection. Just confirming that's not possible. -- Doug Goldstein

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[libvirt-users] libvirt python api for storage-volumes and storage-pools
by John Wayne 07 May '12

07 May '12

hi, how do i list storage pools and volumes using the python bindings? basically the python api calls for virsh pool-list and virsh vol-list thanks

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