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[libvirt-users] Permission issue with cgroups
by Antonio Carlos Salzvedel Furtado Junior 12 May '12

12 May '12

Hello libvirt users, I'm using the cgroup with QEMU guests. At /etc/libvirt/qemu.conf, I have the following parameter: cgroup_controllers = [ "cpu" ] This controller is successfully mounted and libvirt is able to create subgroups for each VM, it's really great the cgroups support in libvirt. The problem is that I can only set the parameters of a given cgroup under the cpu controller if I'm logged in as root. I want another user to have that permission as well. I tried to modify the file /etc/cgconfig.conf to change the permissions. The file is exactly this: group libvirt { perm { admin { uid = opennebula; gid = opennebula; } task { uid = root; gid = root; } } cpu { cpu.shares=512; } } This configuration above does not seem to modify any of the administration permissions. Only the root can edit the parameters under libvirt. The cpu entry was added just to check whether this configuration was read by cgroups at all. The 'cpu.shares' does change in group libvirt. I was careful to start libvirt only after the service cgconfig was restarted. Thanks in advance, Antonio Carlos Furtado

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[libvirt-users] libvirtd fails to start on f16 64bit
by Chad Roberts 11 May '12

11 May '12

Hello, For quite some time, my libvirtd was working great. I came back today to fire-up a VM, but noticed that libvirtd was not running. When I try to start it, I get the following error... libvirtd: symbol lookup error: libvirtd: undefined symbol: avahi_client_new Can anyone shed some light on what my problem may be? Thanks, Chad

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[libvirt-users] segfault with libvirt-0.9.11.3-1
by ovirt＠qip.ru 11 May '12

11 May '12

Hi, ALL On fedora16 hosts with vdsm-4.9.6 after libvirtd daemon started in messages there are too many errors even if no one VM's running, and vdsmd not started May 11 14:44:59 kvm02 kernel: [ 6670.207465] virsh[11015]: segfault at 38 ip 00007f047a52c535 sp 00007fffe3cb0e50 error 4 in libvirt.so.0.9.11[7f047a4bb000+2fd000] May 11 14:44:59 kvm02 kernel: [ 6670.227244] virsh[11018]: segfault at 38 ip 00007f7afe3e6535 sp 00007fff41983d00 error 4 in libvirt.so.0.9.11[7f7afe375000+2fd000] May 11 14:45:09 kvm02 kernel: [ 6680.662175] virsh[11201]: segfault at 38 ip 00007ffe6c129535 sp 00007fffa82c5720 error 4 in libvirt.so.0.9.11[7ffe6c0b8000+2fd000] May 11 14:45:09 kvm02 kernel: [ 6680.679462] virsh[11204]: segfault at 38 ip 00007f9f3c596535 sp 00007fff7cc6c580 error 4 in libvirt.so.0.9.11[7f9f3c525000+2fd000] May 11 14:45:09 kvm02 kernel: [ 6680.696003] virsh[11207]: segfault at 38 ip 00007fa06fb01535 sp 00007fff23cb2260 error 4 in libvirt.so.0.9.11[7fa06fa90000+2fd000] May 11 14:45:09 kvm02 kernel: [ 6680.720678] virsh[11213]: segfault at 38 ip 00007fe557d0b535 sp 00007fff15262720 error 4 in libvirt.so.0.9.11[7fe557c9a000+2fd000] May 11 14:45:09 kvm02 kernel: [ 6680.740552] virsh[11216]: segfault at 38 ip 00007f9dc1507535 sp 00007fff71795540 error 4 in libvirt.so.0.9.11[7f9dc1496000+2fd000] May 11 14:45:20 kvm02 kernel: [ 6691.200793] virsh[11431]: segfault at 38 ip 00007f595f11e535 sp 00007fffc620f660 error 4 in libvirt.so.0.9.11[7f595f0ad000+2fd000] May 11 14:45:20 kvm02 kernel: [ 6691.220691] virsh[11434]: segfault at 38 ip 00007fa843d8c535 sp 00007fff611a4d60 error 4 in libvirt.so.0.9.11[7fa843d1b000+2fd000] May 11 14:45:20 kvm02 kernel: [ 6691.237276] virsh[11437]: segfault at 38 ip 00007f7ece215535 sp 00007fffe0d9ff60 error 4 in libvirt.so.0.9.11[7f7ece1a4000+2fd000] May 11 14:45:20 kvm02 kernel: [ 6691.258537] virsh[11443]: segfault at 38 ip 00007f6bc89f2535 sp 00007fff95244620 error 4 in libvirt.so.0.9.11[7f6bc8981000+2fd000] May 11 14:45:20 kvm02 kernel: [ 6691.278057] virsh[11446]: segfault at 38 ip 00007f4c16f36535 sp 00007fff35394480 error 4 in libvirt.so.0.9.11[7f4c16ec5000+2fd000] May 11 14:45:31 kvm02 kernel: [ 6701.766999] virsh[11660]: segfault at 38 ip 00007f8b64ce7535 sp 00007fffac3014c0 error 4 in libvirt.so.0.9.11[7f8b64c76000+2fd000] May 11 14:45:31 kvm02 kernel: [ 6701.786796] virsh[11663]: segfault at 38 ip 00007f6184ead535 sp 00007fff790ccd50 error 4 in libvirt.so.0.9.11[7f6184e3c000+2fd000] May 11 14:45:31 kvm02 kernel: [ 6701.806817] virsh[11666]: segfault at 38 ip 00007f5aa114f535 sp 00007fffb3d06d60 error 4 in libvirt.so.0.9.11[7f5aa10de000+2fd000] May 11 14:45:31 kvm02 kernel: [ 6701.831577] virsh[11672]: segfault at 38 ip 00007f2d6d123535 sp 00007fff3f45e820 error 4 in libvirt.so.0.9.11[7f2d6d0b2000+2fd000] May 11 14:45:31 kvm02 kernel: [ 6701.851596] virsh[11675]: segfault at 38 ip 00007f8160f16535 sp 00007ffff211d210 error 4 in libvirt.so.0.9.11[7f8160ea5000+2fd000] During compilation I saw this error PASS: start PASS: undefine PASS: vcpupin TEST: virsh-all ........................................ 40 ........................................ 80 .../virsh-all: line 34: 14498 Segmentation fault $abs_top_builddir/tools/virsh -c $test_url $i < /dev/null > /dev/null 2>&1 ...................................... 120 ........................................ 160 ............................ 188 OK PASS: virsh-all PASS: virsh-optparse PASS: virsh-schedinfo but compilation finished and all rpms were created environment: [root@kvm02 ~]# uname -a Linux kvm02 3.3.4-3.fc16.x86_64 #1 SMP Thu May 3 14:46:44 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux [root@kvm02 ~]# rpm -q qemu-kvm qemu-kvm-0.15.1-4.fc16.x86_64 [root@kvm02 ~]# rpm -q libvirt libvirt-0.9.11.3-1.fc16.x86_64 [root@kvm02 ~]# rpm -q vdsm vdsm-4.9.6-0.163.git0633cd2.fc16.x86_64 How is it possible to correct this? --

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[libvirt-users] listing active and defined vs inactive and defined domains
by John Wayne 11 May '12

11 May '12

i am trying to list active + defined and inactive + defined domains using libvirt 0.9.4 i can get active domains using: def s_activedomains(conn): #get active domain ids numofdomains=libvirt.virConnect.numOfDomains(conn) activedomains=libvirt.virConnect.listDomainsID(conn) return activedomains i am stuck on how to get inactive domains the example listed here http://libvirt.org/guide/html/Application_Development_Guide-Guest_Domains-L… under example 4.4 and example 4.5 seems to be outdated looking at /usr/lib64/python2.6/site-packages/libvirt.py, line 2337 says that "Note that this won't work for inactive domains which have an ID of -1" i think example 4.5 is wrong because if inactive domains have an id of -1, then i can't call virDomainLookupBy{Name,ID}

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[libvirt-users] Forward port 4444 to a static-IP VM
by Sean Abbott 11 May '12

11 May '12

I'm attempting to set up a selenium grid on virtual machines. The default NAT is good enough for almost everything, but I need to be able to send my hub VM requests on port 4444. I've attempted to get this going by adding the following to my iptables firewall: -t nat -A PREROUTING -p tcp --dport 4444 -j DNAT --to-destination 192.168.122.107:4444 -t filter -A FORWARD -m state -d 192.168.122.107 --state NEW,RELATED,ESTABLISHED -j ACCEPT And...it's not working. I can hit the port and make requests from the host. Help, please? Thanks! sean

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[libvirt-users] serial console
by John Wayne 10 May '12

10 May '12

hi, when creating a domain using libvirt python api, how would i tell libvirt to use a unique serial port number for domains? in the libvirt.virConnect.defineXML(conn,domainxml) call when i create the domainxml object, i need to ensure that the part below has a unique # for target port <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> currently the domains running on hypervisors have target port numbers such as 1,2,3 and so on. thanks

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[libvirt-users] virsh console logging and pty usage
by Doug Goldstein 10 May '12

10 May '12

Is it possible to both log the serial console and to actually use it? A few of the VMs I've got are configured as follows: <serial type='file'> <source path='/var/log/libvirt/qemu/serial/bb-2.6.18-128.el5-x86_64.log'/> <target port='0'/> </serial> <console type='file'> <source path='/var/log/libvirt/qemu/serial/bb-2.6.18-128.el5-x86_64.log'/> <target type='serial' port='0'/> </console> Because people are hoping to capture the logs after the fact to see if there was any console output which could help them debug an issue. However, if you need to connect to the console of the VM its impossible (e.g. it needs the root password for a fsck). Any suggestions to allow logging but allow it to be usable via "virsh console" as well? Thanks. -- Doug Goldstein

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[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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