- Users - libvirt List Archives

[libvirt-users] kvm/vmware side-by-side?
by Boylan, Ross 21 Mar '15

21 Mar '15

http://libvirt.org/drvvmware.html says "The libvirt VMware driver should be able to manage any Workstation, Player, Fusion version supported by the VMware VIX API." 1. Does this mean it supports the vmware hypervisor, or just that it understands the disk images and perhaps other cotnrol file info? 2. If it supports the hypervisor, does this mean that kvm and vmware hypervisors can be running on the same host? I've read statements elsewhere that they are incompatible. I'd probably be running VMWare Workstation 11, though I could get Player or vCenter Server if it mattered. Thanks. Ross Boylan

1 0

[libvirt-users] getting oriented/networking
by Boylan, Ross 21 Mar '15

21 Mar '15

I've been using virt-manager and kvm with a disk image (as in the raw bits) from a physical windows 7 machine. Initial performance was dreadful, but improved as I switched to virtio and spice. I've been running linux VM's somewhat longer (much longer if you count kvm without libvirt). There are lots of choices exposed by virt-manager. How do I find out what the choices mean, and which are good ones? This was true for the video (resolved by following instructions for spice, though I still wonder what the other settings are for), disks and the network. In particular, I have a choice of lots of interfaces for my network; I picked eth1:macvtap because I wanted to bridge eth1. But there is a "Source Mode" which I left at VEPA, even though Bridged was another choice. But the bridge would already seem implicit in picking a source device of eth1:macvtap. I don't know what "source mode" means. The choices in the GUI seem like some of the options listed under forward on http://libvirt.org/formatnetwork.html; is that a good place to look for clarification. I started a 2nd VM that also used eth1:macvtap (with virtio) and it had almost no network throughput. So maybe I should use some other method? I notice the network manager connection gui allows creation of bridges on the network; should I be using that? I have been reading documentation, but I haven't found either a task-oriented discussion ("to get a windows machine working well, use these options" or "follow these steps") or an easy way to go from the choices in the GUI to a discussion of their meaning. Thanks for any help you can offer. Ross Boylan

2 2

[libvirt-users] libvirt-python Segfaults
by Harish Vishwanath 20 Mar '15

20 Mar '15

Hello I am trying to get libvirt-python working in Ubuntu 14.04 64 bit system. I tried installing the binaries from the repo itself: 1. root@test-vm8-109:/home/test# libvirtd --version libvirtd (libvirt) 1.2.2 root@test-vm8-109:/home/test# python Python 2.7.6 (default, Mar 22 2014, 22:59:56) [GCC 4.8.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import libvirt >>> libvirt.__file__ '/usr/lib/python2.7/dist-packages/libvirt.pyc' >>> c = libvirt.virConnect("lxc:///") >>> c.listAllDomains() Segmentation fault (core dumped) 2. Installing the latest libvirt-python from pypi (1.2.13) also has the same issue. This is the gdb bt of the core: [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `python test.py'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007fd8d91b19a9 in virObjectIsClass () from /usr/lib/libvirt.so.0 (gdb) bt #0 0x00007fd8d91b19a9 in virObjectIsClass () from /usr/lib/libvirt.so.0 #1 0x00007fd8d9268d02 in virConnectListAllDomains () from /usr/lib/libvirt.so.0 #2 0x00007fd8d964db96 in libvirt_virConnectListAllDomains (self=<optimized out>, args=<optimized out>) at libvirt-override.c:2470 #3 0x000000000052c6d5 in PyEval_EvalFrameEx () #4 0x000000000055c594 in PyEval_EvalCodeEx () #5 0x000000000052ca8d in PyEval_EvalFrameEx () #6 0x000000000055c594 in PyEval_EvalCodeEx () #7 0x00000000005b7392 in PyEval_EvalCode () #8 0x0000000000469663 in ?? () #9 0x00000000004699e3 in PyRun_FileExFlags () #10 0x0000000000469f1c in PyRun_SimpleFileExFlags () #11 0x000000000046ab81 in Py_Main () #12 0x00007fd8da894ec5 in __libc_start_main (main=0x46ac3f <main>, argc=2, argv=0x7fff0fcbd218, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff0fcbd208) at libc-start.c:287 #13 0x000000000057497e in _start () Am I missing something? Regards, Harish

2 3

[libvirt-users] Building libvirt 1.2.13 from source
by Harish Vishwanath 20 Mar '15

20 Mar '15

Hello I am trying to build libvirt 1.2.13 (latest) from source on a Ubuntu 14.04 64 bit box. After installing all the dependencies (libyajl, libdevmapper, libpciaccess, libnl), I could finish the build and install. However, invoking libvirtd throws this: root@ubuntu:/home/hvishwanath/Downloads/libvirt-1.2.13# libvirtd libvirtd: /usr/lib/libvirt-qemu.so.0: version `LIBVIRT_QEMU_1.2.3' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_1.2.9' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_1.2.3' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_1.2.11' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_1.2.7' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_1.2.12' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_1.2.5' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_1.2.6' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_1.2.8' not found (required by libvirtd) libvirtd: /usr/lib/libvirt.so.0: version `LIBVIRT_PRIVATE_1.2.13' not found (required by libvirtd) Any help is much appreciated. Regards, Harish

4 3

[libvirt-users] C code to generate domain XML
by Parvathi 20 Mar '15

20 Mar '15

Hi, Are there any C code (in libvirt) to generate domain XML like the one we supply to virsh? Thanks!

2 1

[libvirt-users] Development of application on using the libvirt API(s)
by Parvathi 20 Mar '15

20 Mar '15

Hi, I am developing an application that would essentially control/run VMs on a X86_64 host machine. The existing OS is 32 bit based so the application needs to be 32bit too. KVM/QEMU are 64 bit so that guests could be either be 32 or 64 bit. Does using libvirt as 32bit library on a 64bit host (capable of hosting 32 and 64 bit guests) pose any problems? Will it even work? Thanks, Parvathi

2 1

[libvirt-users] Regarding save and restore in libvirt 1.2.2
by cool dharma06 19 Mar '15

19 Mar '15

hi all, i am exploring openstack. By the openstack i experimented the resizing instance its working fine. But from virsh i tried save and redstore VM its not working properly. i put GDB on libvirtd process also its not showing anything. its running perfectly. while virsh save vm id filename -> saving the VM and get into shutdown state. then i tried to restore by virsh restore filename --running -> its showing as running then its getting destroyed automatically. I cant able find the issue. I grepped the logs also its not showing anything related to errors. 2. By virsh save-image-edit filename i tried to edit the vCPUs number but i am not able to edit and save the file. Its showing the following error -> "error: unsupported configuration: Target domain vCPU count 2 does not match source 1" Give some suggestions to resolve the issue. Thanks & regrads, cooldharma06 .. :)

1 0

[libvirt-users] pty pairing host - guest
by Neel Basu 19 Mar '15

19 Mar '15

HI!, I am using virt-manager GUI. There I can add a `Console Device` through Add Hardware. I can add a virtio pty WITHOUT restarting the VM. also I get a pty allocated to host machine say `/dev/pty/M` My expectation is this `host:/dev/pty/M` is connected with a `guest:/dev/ttyN`. so If I open minicom or screen and write to `host:/dev/pty/M` it will be propagated to 'guest:/dev/ttyN'. Is my expectation correct ? If it is correct how will I know what is the guest tty allocated against this host pty ? This is what I've tried: dumpxml returns <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> I expected host:/dev/pts/1 is paired with guest:/dev/ttyS0. so I opened screen/cat/echo on both sides but could not exchange messages ------ Similar to console device I can add a Serial device but that requires a reboot of the guest VM. However I tried that though I prefer to do it without a guest restart. <serial type='pty'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </serial> here also I expected host:/dev/pts/1 is paired with /dev/ttyS0 but couldn't communicate. My sole requirement is to have a tty pair in host and guest that can be used to communicate with each other. I am using qemu-kvm. Thank You.

2 1

[libvirt-users] how to get disk snapshot size
by Yitao Jiang 17 Mar '15

17 Mar '15

Hi,guys I wanna to get the disk snapshot size, but found nothing libvirt commands related,except qemu-img. I create two disk snapshots, but nothing return its' size [root@cskvm01 qcow2]# qemu-img info /mnt/e6758700-af68-3c06-ade3-53f5f9b93507/e2cf6551-0d2c-4382-a86c-8ba633954ff2 image: /mnt/e6758700-af68-3c06-ade3-53f5f9b93507/e2cf6551-0d2c-4382-a86c-8ba633954ff2 file format: qcow2 virtual size: 5.0G (5368709120 bytes) disk size: 1.0G cluster_size: 65536 Snapshot list: ID TAG VM SIZE DATE VM CLOCK 1 4fc42d73-8257-42bd-8807-81700fd3c689 0 2015-03-15 21:05:55 01:05:53.583 2 2fd6aeab-cb26-446d-b1c6-e8d70d33f651 0 2015-03-15 21:50:35 00:00:00.000 After wrote data to the disk, then create another snapshot [root@cskvm01 qcow2]# qemu-img info /mnt/e6758700-af68-3c06-ade3-53f5f9b93507/e2cf6551-0d2c-4382-a86c-8ba633954ff2 image: /mnt/e6758700-af68-3c06-ade3-53f5f9b93507/e2cf6551-0d2c-4382-a86c-8ba633954ff2 file format: qcow2 virtual size: 5.0G (5368709120 bytes) disk size: 3.9G cluster_size: 65536 Snapshot list: ID TAG VM SIZE DATE VM CLOCK 1 4fc42d73-8257-42bd-8807-81700fd3c689 0 2015-03-15 21:05:55 01:05:53.583 2 2fd6aeab-cb26-446d-b1c6-e8d70d33f651 0 2015-03-15 21:50:35 00:00:00.000 3 63815565-3a06-4366-a1b3-bfeb9c4a07b4 0 2015-03-15 22:22:43 00:00:00.000 VM SIZE column still show 0 Here is my environment qemu-img version 0.12.1, Copyright (c) 2004-2008 Fabrice Bellard libvirtd (libvirt) 0.10.2 CentOS release 6.5 (Final) 2.6.32-431.el6.x86_64 --- Thanks, Yitao(依涛姜) jiangyt.github.io

3 3

[libvirt-users] Processor usage of qemu process.
by Dominique Ramaekers 15 Mar '15

15 Mar '15

I have been using libvirt for a while now with some linux guest installed. And everything has been working great. I've got a nice new (used) HP virtual host with 12 x dual core and 48Gb mem. My Windows servers are getting old, so I found it was time to take the next step and also virtualise my Windows systems. Now I've got two Windows guests on my new host: - A Windows 8.1 which runs a Autodesk Job Processor - A Windows Server 2012 R2 which runs a Pervasive SQL, Autodesk Vault Server (MSSQL, IIS), Autodesk license server,... The first is constanly using 30% host-CPU and the second one is using 50% host-CPU. Both guests are using <5% guest CPU... (Host system load is between 0.1 and 0.3...) Is it normal Windows guests take up 30% to 50% host CPU resources? The Windows 8.1 is actualy a simpel PC with almost no activity... Version: QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.10), Copyright (c) 2003-2008 Fabrice Bellard

3 13