- Users - libvirt List Archives

[libvirt-users] how to store an internal disk snapshot by use
by Rujie Xu 30 May '12

30 May '12

Hello everyone, I am trying to find a way to store an internal disk snapshot and supposed to restore later. Here is the problems I met: 1) when I use SnapshotCreateXML() to create a disk_only snapshot while the domain is inactive, there is an error happened: disk snapshot of inactive domains not implemented yet. I am wondering is there and way I can save the disk_only snapshot when the domain is inactive right now? 2) also use snapshotCreateXML() to create a disk_only snapshot while the domain is active, and use the xml to set the <disk name="hda" snapshot="internal"> there is also an error happened: unsupported configuration: active qemu domains require external disk snapshot; disk hda requested internal 3) when I use snapshotCreateXML() to create a disk_only snapshot using external file, it could be done, but when I try to use revertToSnapshot() to revert this snapshot there is another error happened: revert to external snapshot not supported yet. Is there anyone can help me about this, or we just can't use libvirt to managed the disk snapshot right now? Thanks very much! -- Best Regards, Roger Xu

3 3

Re: [libvirt-users] some problem with snapshot by libvirt
by xingxing gao 29 May '12

29 May '12

sure you can add the list back in, 2012/5/29 Eric Blake <eblake(a)redhat.com>: > On 05/29/2012 09:03 AM, xingxing gao wrote: >> to create snapshot ,I did step below: > > I'd really rather answer this in public; do I have your permission to > add the list back in, or better yet, can you repost to the list? > > Also, the list tends to frown on top-posting. > >>> Did you mean for this to go to the list, so that others may chime in or >>> benefit from the answers? >>> > > > -- > Eric Blake eblake(a)redhat.com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org >

1 0

[libvirt-users] create net if, but not connect
by Sergio Kvjato 29 May '12

29 May '12

Hello, is there a way to create net if but not connect to any bridge? <interface type='ethernet'/> is not work becaue its need to run in root mode not user mode Thanks.

1 0

[libvirt-users] What features of kernel are required to support virDomainGetCPUStats?
by Zhihua Che 29 May '12

29 May '12

Hi, Weeks ago, I developed my app under ubuntu-11.10 (kernel 3.0) with lilbvirt-0.9.10. In my code , I used virDomainGetCPUStats to query cpu usage info of domains, and it worked well. However, today, I port my code to ubuntu-10.04.4 (kernel 2.6.32) with libvirt-0.9.10, I find the function virDomainGetCPUStats can't work and complains "this function is not supported by the connection driver: virDomainGetCPUStats". I guess the kernel difference cause this problem because the libvirt is the same on two operating systems. I wonder what features of kernel are required to support virDomainGetCPUStats? I thought cgroup is a prerequisite. The following are .config files of two kernels. ubuntu-11.10 CONFIG_CGROUP_FREEZER=y CONFIG_CGROUP_DEVICE=y CONFIG_CPUSETS=y CONFIG_PROC_PID_CPUSET=y CONFIG_CGROUP_CPUACCT=y CONFIG_RESOURCE_COUNTERS=y CONFIG_CGROUP_MEM_RES_CTLR=y CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED=y CONFIG_CGROUP_PERF=y CONFIG_CGROUP_SCHED=y CONFIG_FAIR_GROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_BLK_CGROUP=y ubuntu-10.04.4 CONFIG_CGROUP_NS=y CONFIG_CGROUP_FREEZER=y CONFIG_CGROUP_DEVICE=y CONFIG_CPUSETS=y CONFIG_PROC_PID_CPUSET=y CONFIG_CGROUP_CPUACCT=y CONFIG_RESOURCE_COUNTERS=y CONFIG_CGROUP_MEM_RES_CTLR=y CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y CONFIG_CGROUP_SCHED=y CONFIG_FAIR_GROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_MM_OWNER=y As you can see, CPUSET and CPUACCT are enabled in both kernels. So what else features of kernel are required to support virDomainGetCPUStats? harvey

3 3

[libvirt-users] New Bugzilla components for upstream bug reporting
by Daniel P. Berrange 28 May '12

28 May '12

Historically we have told people to report all upstream bugs against Product: Virtualization Tools Component: libvirt We now provide much more than just the core libvirt package though. Thus we have created a large number of new components for reporting upstream bugs against, one for each package we distribute: Component: libvirt-appdev-guide - Libvirt application development guide Component: libvirt-glib - Libvirt GLib, GConfig & GObject libraries Component: libvirt-cim - Libvirt CIM provider Component: libvirt-csharp - Libvirt C# language bindings Component: libvirt-java - Libvirt Java language bindings Component: libvirt-ocaml - Libvirt OCaml language bindings Component: libvirt-perl - Libvirt Perl language bindings Component: libvirt-php - Libvirt PHP language bindings Component: libvirt-publican - Libvirt Publican documentation templates Component: libvirt-sandbox - Libvirt application sandbox toolkit Component: libvirt-snmp - Libvirt SNMP agent Component: libvirt-tck - Libvirt TCK (Technology Compatibility Kit) Component: libvirt-test-API - Libvirt test API Component: libvirt-virshcmdref - Libvirt virsh command reference Component: ruby-libvirt - Libvirt Ruby language bindings The bug reporting form is here: https://bugzilla.redhat.com/enter_bug.cgi?product=Virtualization%20Tools NB, if you are using a binary package provided by your OS vendor, then you should use their bug tracker for reporting bugs first. Feel free to also report it to the libvirt upstream bug tracker at the same time though. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|

1 0

[libvirt-users] [libivrt-users] What features of kernel are required to support virDomainGetCPUStats?
by Zhihua Che 28 May '12

28 May '12

Hi, Weeks ago, I developed my app under ubuntu-11.10 (kernel 3.0) with lilbvirt-0.9.10. In my code , I used virDomainGetCPUStats to query cpu usage info of domains, and it worked well. However, today, I port my code to ubuntu-10.04.4 (kernel 2.6.32) with libvirt-0.9.10, I find the function virDomainGetCPUStats can't work and complains "this function is not supported by the connection driver: virDomainGetCPUStats". I guess the kernel difference causes this problem because the libvirt is the same on two operating systems. I wonder what features of kernel are required to support virDomainGetCPUStats? I thought cgroup is a prerequisite. The following are .config files of two kernels. ubuntu-11.10 CONFIG_CGROUP_FREEZER=y CONFIG_CGROUP_DEVICE=y CONFIG_CPUSETS=y CONFIG_PROC_PID_CPUSET=y CONFIG_CGROUP_CPUACCT=y CONFIG_RESOURCE_COUNTERS=y CONFIG_CGROUP_MEM_RES_CTLR=y CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y CONFIG_CGROUP_MEM_RES_CTLR_SWAP_ENABLED=y CONFIG_CGROUP_PERF=y CONFIG_CGROUP_SCHED=y CONFIG_FAIR_GROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_BLK_CGROUP=y ubuntu-10.04.4 CONFIG_CGROUP_NS=y CONFIG_CGROUP_FREEZER=y CONFIG_CGROUP_DEVICE=y CONFIG_CPUSETS=y CONFIG_PROC_PID_CPUSET=y CONFIG_CGROUP_CPUACCT=y CONFIG_RESOURCE_COUNTERS=y CONFIG_CGROUP_MEM_RES_CTLR=y CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y CONFIG_CGROUP_SCHED=y CONFIG_FAIR_GROUP_SCHED=y CONFIG_RT_GROUP_SCHED=y CONFIG_MM_OWNER=y As you can see, CPUSET and CPUACCT are enabled in both kernels. So what else features of kernel are required to support virDomainGetCPUStats? harvey

1 0

[libvirt-users] Cannot connect to the existing LXC containers (console)
by Sebastien Douche 28 May '12

28 May '12

Hi, after 2 years of "pure" LXC usage, I'm trying now to administrate our LXC containers with libvirt No problem with a LXC container I create "from Scratch" (lxc-create), but with our existing containers, I've a strange behavior with the console: vsonde43 login: Debian GNU/Linux 5.0 vsonde43 console vsonde43 login: Debian GNU/Linux 5.0 vsonde43 tty1 vsonde43 login: Debian GNU/Linux 5.0 vsonde43 console vsonde43 login: Debian GNU/Linux 5.0 vsonde43 tty1 vsonde43 login: Debian GNU/Linux 5.0 vsonde43 console vsonde43 login: root Password: z Login incorrect vsonde43 login: Login incorrect vsonde43 login: root Password: Password: Login incorrect vsonde43 login: root INIT: Id "c2" respawning too fast: disabled for 5 minutes INIT: Id "c3" respawning too fast: disabled for 5 minutes INIT: Id "c4" respawning too fast: disabled for 5 minutes INIT: Id "c2" respawning too fast: disabled for 5 minutes INIT: Id "c3" respawning too fast: disabled for 5 minutes INIT: Id "c4" respawning too fast: disabled for 5 minutes Characters sometimes appears, and sometimes all keys are like the enter key. Any ideas? I tried many xml configurations w/o sucsess. Thanks. PS: libvirt 0.9.8 / lxc 0.7.5 -- Sebastien Douche <sdouche(a)gmail.com> Twitter: @sdouche / G+: +sdouche

2 4

[libvirt-users] Spawn new domains from a snapshot.
by NoxDaFox 27 May '12

27 May '12

Hello everybody, I would like to be able to spawn several domains from a given snapshot. Here's a possible scenario: - I start from disk image A.qcow2. - I made some changes to A and I take different snapshots: 1 - 2 - 3 - While A is still running I would like to run domains B and C from snapshot 2 I don't want to revert a domain, I want to create new ones. The original should be still running but it may be stopped if necessary. The idea I had was to create a qcow2 image through qemu-img (let's call it Z.qcow2), as I'm using copy on write for performances then I'd need to commit the changes contained in Z to A always using qemu-img. Is there any other better way? I would love to do it through libvirt, maybe specifying in the config file the backing store path of the whole disk and then giving as a source file the one containing deltas. This could be a good idea for realizing a cloud based system as a incredible amount of time would be saved though it. Imagine moving only qcow2 file containing deltas through the network and then give the base image to each node so that it can use it for start it's own domain. As well would be possible to store the heavy base image in a single node saving storage space. Lots of cpu cycles saved once new image versions must be deployed (typical case a windows update to propagate in the nodes network). NoxDaFox

2 3

[libvirt-users] How to specify the libvirtd in connect call
by Zhihua Che 25 May '12

25 May '12

Hi, Here is my situation, I install libvirt in a non-default directory and start libvird with sudo. While I can connect virsh to libvirtd using "virsh --connect qemu:///system", I fail to connect my app using "virConnectOpen("qemu:///system")", which complains "unable to locate libvirtd daemon in $PATH". Then, I take another try and add the path of libvirtd in env variable PATH. Unfortunately, it doesn't work. I read through the api reference and find no place to specify this path explicitly. Thanks for any tip. Harvey

1 1

[libvirt-users] monitor socket did not show up.: No such file or directory
by vipul borikar 23 May '12

23 May '12

I am using a Nimbus Cloud Middleware which in turn use Python libvirt binding to start VM's. Hypervisor is KVM. # virsh -c qemu:///system version Compiled against library: libvir 0.8.7 Using library: libvir 0.8.7 Using API: QEMU 0.8.7 Running hypervisor: QEMU 0.12.1 Some time i get the error in the Nimbus Logs it says : UnexpectedError: Problem creating the VM: monitor socket did not show up.: No such file or directory I googled but this particular not able to find. I checked the /var/log/libvirt/qemu/wrksp-427.log 2012-05-23 10:09:13.494: starting up LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin HOME=/root USER=root LOGNAME=root QEMU_AUDIO_DRV=none /usr/libexec/qemu-kvm -S -M rhel6.1.0 -enable-kvm -m 2024 -smp 2,sockets=2,cores=1,threads=1 -name wrksp-427 -uuid e8c5c171-392c-02e4-b43c-b0b4279e55c5 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/wrksp-427.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -boot c -drive file=/VM/Nimbus/secureimages/wrksp-427/ param-vm.cdacb.in/cloud/5f4f0dcd//RHEL5.5_64bit_MPI,if=none,id=drive-ide0-0-0,format=raw-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -netdev tap,fd=24,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=a2:aa:bb:2e:d6:58,bus=pci.0,addr=0x3 -usb -vnc 127.0.0.1:22 -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 10:09:13.512: 14116: info : libvirt version: 0.8.7, package: 18.el6 (Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>, 2011-04-18-10:28:30, x86-008.build.bos.redhat.com) 10:09:13.512: 14116: debug : virCgroupNew:566 : New group /libvirt/qemu/wrksp-427 10:09:13.513: 14116: debug : virCgroupDetect:245 : Detected mount/mapping 0:cpu at /cgroup/cpu in 10:09:13.513: 14116: debug : virCgroupDetect:245 : Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in 10:09:13.513: 14116: debug : virCgroupDetect:245 : Detected mount/mapping 2:cpuset at /cgroup/cpuset in 10:09:13.513: 14116: debug : virCgroupDetect:245 : Detected mount/mapping 3:memory at /cgroup/memory in 10:09:13.513: 14116: debug : virCgroupDetect:245 : Detected mount/mapping 4:devices at /cgroup/devices in 10:09:13.513: 14116: debug : virCgroupDetect:245 : Detected mount/mapping 5:freezer at /cgroup/freezer in 10:09:13.513: 14116: debug : virCgroupDetect:245 : Detected mount/mapping 6:blkio at /cgroup/blkio in 10:09:13.513: 14116: debug : virCgroupMakeGroup:497 : Make group /libvirt/qemu/wrksp-427 10:09:13.513: 14116: debug : virCgroupMakeGroup:509 : Make controller /cgroup/cpu/libvirt/qemu/wrksp-427/ 10:09:13.513: 14116: debug : virCgroupMakeGroup:509 : Make controller /cgroup/cpuacct/libvirt/qemu/wrksp-427/ 10:09:13.514: 14116: debug : virCgroupMakeGroup:509 : Make controller /cgroup/cpuset/libvirt/qemu/wrksp-427/ 10:09:13.514: 14116: debug : virCgroupMakeGroup:509 : Make controller /cgroup/memory/libvirt/qemu/wrksp-427/ 10:09:13.514: 14116: debug : virCgroupSetValueStr:290 : Set value '/cgroup/cpu/libvirt/qemu/wrksp-427/tasks' to '14116' 10:09:13.714: 14116: debug : virCgroupSetValueStr:290 : Set value '/cgroup/cpuacct/libvirt/qemu/wrksp-427/tasks' to '14116' 10:09:14.467: 14116: debug : virCgroupSetValueStr:290 : Set value '/cgroup/cpuset/libvirt/qemu/wrksp-427/tasks' to '14116' 10:09:15.467: 14116: debug : virCgroupSetValueStr:290 : Set value '/cgroup/memory/libvirt/qemu/wrksp-427/tasks' to '14116' 2012-05-23 10:09:16.537: shutting down There is no suspect in the log file. Any Ideas??? -- Thanks Vipul Borikar "Our task must be to free ourselves...by widening our circle of compassion to embrace all living creatures and the whole of nature and its beauty."

1 0