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[libvirt-users] UDP unicast network backend (QEMU)
by Stanley Karunditu 04 Aug '15

04 Aug '15

In 2012 QEMU added UDP unicast network backend support https://github.com/qemu/qemu/commit/0e0e7facc775e9bb020314f48751b3d09f316c8… Checked latest libvirt on the git repo, and didn't see this as an option. So tried to use the mcast tunnel mode. I keep getting duplicate packets with BPDUs and LLDP packets going between the Point to point connection between the VMs. VMs have bridges on them. When I used the TCP tunnel interface, if the client came up before the server end, the connection failed to establish. So both methods not super reliable. If I manually change the netdev settings to use unicast udp tunneling the connection is way more stable just like the GNS3 connections. Has anyone written support for UDP unicast network backend for QEMU and the patch is awaiting review? Searched mailing list and couldn't find a bug covering this. Just want to be sure no one has worked on this before creating a patch to add this support.

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[libvirt-users] How to run libvirtd as non root user
by Anshul Arora (akarora) 30 Jul '15

30 Jul '15

Team, I note that libvertd runs as root user that is against the least privilege security model. root 307278 1 0 Jun20 ? 04:16:46 /usr/sbin/libvirtd -listen Appreciate pointers to alternate options that user could configure as a potential mitigation plan? Thanks, -Anshul

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[libvirt-users] libvirt-1.2.17 I can't define lxc container
by Marcin Mirosław 30 Jul '15

30 Jul '15

Hello! I'd like to set up my first lxc container using libvirt. I'd like to start using the simplest configuration and next add things I need. So I've got xml as below: <domain type='lxc'> <name>vm1</name> <memory>32768</memory> <os> <type>exe</type> <init>/init</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <features> <capabilities policy='on'> </capabilities> </features> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/opt/vm-1-root'/> <target dir='/'/> </filesystem> <interface type='network'> <source network='default'/> </interface> <console type='pty' /> </devices> </domain> When I try to define container I'm getting: virsh # define /tmp/vm1.xml error: Failed to define domain from /tmp/vm1.xml error: invalid argument: could not find capabilities for ostype=exe domaintype=lxc I can't also find similar problem using web search engine. Maybe someone here can give me advice? Marcin # virsh -V Virsh command line tool of libvirt 1.2.17 See web site at http://libvirt.org/ Compiled with support for: Hypervisors: QEMU/KVM LXC VMWare ESX Test Networking: Remote Bridging Interface udev Nwfilter Storage: Dir Filesystem SCSI LVM Miscellaneous: Daemon Nodedev Secrets Debug Readline Modular

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[libvirt-users] Custom bios image for qemu
by Phil Tooley 29 Jul '15

29 Jul '15

Hello all, So I am trying to get a qemu guest to use a custom patched seabios image rather than the default /usr/share/qemu/bios.bin I have tried changing the domain config file to include either: <os> --SNIP-- <loader readonly='yes' type='rom'>/home/telemin/qemu/seabios_patched.bin</loader> </os> OR domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0' --SNIP-- <qemu:commandline> <qemu:arg value='-smbios'/> <qemu:arg value='file=/home/telemin/qemu/seabios_patched.bin'/> </qemu:commandline> --SNIP-- And neither of these approaches result in the new seabios_patched.bin being used. I am clearly missing something here, can anyone with some more experience tell me what it is please? Many Thanks Phil Tooley

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Re: [libvirt-users] Migrate Win2k3 to KVM
by Pierre Schweitzer 26 Jul '15

26 Jul '15

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Regarding product activation, there's nothing I can do. You've to call Microsoft to re-activate your W2k3 licence. This is due to hardware change on virtualization. Regards, On 25/07/2015 20:54, Ruzsinszky Attila wrote: > Hi Pierre, > > I think the boot is working! ;-) I changed my image to IDE disk and > W2k3 started booting but wants Product Activation ... What can I do > with this? I can't login. I think it is a loop when I click on OK > button in the warning window. > > TIA, Ruzsi > - -- Pierre Schweitzer <pierre at reactos.org> System & Network Administrator Senior Kernel Developer ReactOS Deutschland e.V. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBAgAGBQJVtLm1AAoJEHVFVWw9WFsLyUsQAKv0EnHnYZ+PkWMuRPvCS4xa WnvnEkwIBxqrSXIG/b8mZ676mb+3ba9nZO22HZTKqqAndCrxQ46vsC87YSw9akcX +Dt1EC+BWMwclG4x/LSFM44uN6ZuqRqXNWIHL1B/fZ4DUO41RQDzX0yokc16+lxE OwzQQ5Rf8gYqHRBP/CdbrrPbgVnoa08ejRt0uwWhrMJtWwcFYz4YmPHBDSJV+GM7 lp6uU835mWDRR2DzIQ7gpDAAu3f1O2TPy15wFlidVn6XqjIcxIF9QqDj+ktQmyk+ im+PeVeqTGL75H2hyQMcx8z/kJm3ZktuqlTWbY4JvpNqBSodTYjVM9QnDsGf9JR7 Wvb6iEvxkLzGODXQ+YS2NOF4NJfTV0Wg1aodx5y+seMVlmAmFapq9QgNU39JTjg/ reMcVqjj3Es3DrQWWTZw0Mcvg2E/zxM3I58zg4Flylfxb/Krd3W4GRchwSx+/3u5 pA2Xb+Qq6Db/rWljVKHjN+LYW9llhr+/yu/W9+FYv2qJl0zZnHui+uDgljx1Byax urjYE2XCfSzDXvayVo7xTbSzpBi7MX0NlJZoK7kY7i4f7IV4ZSQZ+7owa05pH05v KQwjZzuSClFItIKARQ3JqXhi1ybmCH3jsoRbls6grX/tfkpzBrn1KspCFGMq7Fl/ LmU5uWVuO0o5YmQppckz =VNFx -----END PGP SIGNATURE-----

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Re: [libvirt-users] Migrate Win2k3 to KVM
by Pierre Schweitzer 25 Jul '15

25 Jul '15

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 25/07/2015 13:55, Ruzsinszky Attila wrote: > Hi Pierre, > > I got enough inspiration typing in the needed reg. keys. > > Here is a difference: What you wrote me: > > intelide >> { ErrorControl(REG_DWORD): 00000001 Group(REG_SZ): System Bus >> Extender Start(REG_DWORD): 00000000 Tag(REG_DWORD): 00000004 >> Type(REG_DWORD): 00000001 ImagePath(REG_SZ): >> system32\drivers\intelide.sys } >> > > My reg. keys: > > \ControlSet001\Services\IntelIde> ls Node has 0 subkeys and 5 > values size type value name [value if > type DWORD] 4 REG_DWORD <ErrorControl> 1 > [0x1] 40 REG_SZ <Group> 4 REG_DWORD <Start> > 4 [0x4] 4 REG_DWORD <Tag> 4 [0x4] 4 > REG_DWORD <Type> 1 [0x1] > > \ControlSet001\Services\IntelIde> cat Group Value <Group> of type > REG_SZ, data length 40 [0x28] System Bus Extender > > Do I have to change? Start and ImagePath are different. Let ImagePath, it should match your system more closely (and differences might be just in case, so no real matter). But you absolutely have to change Start. If Start isn't at 0x0, then, the driver will not be loaded at boot, and you won't be able to boot your Win2k3. - -- Pierre Schweitzer <pierre at reactos.org> System & Network Administrator Senior Kernel Developer ReactOS Deutschland e.V. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBAgAGBQJVs6/oAAoJEHVFVWw9WFsL8vcQAMd0C5zPHdwzoANR5peBl9mJ Z/9jY9/mF7E29yAmwKm0d3vXKgtja7v5vWar5rbyvSDpNKnUjQlwVdJEiGWwpcko 21xP7dC/IGGeEtn38wtfKOVZ0OQOAE1zs6YqbTDYSm1WgtTKNHvWjYQiPCwPmIYi cWqmXxF0SF2ADEiRjYlqZT2cd5Ersu+hy+bRlYGUxi4t2KhQf5vnz3kqZeY2BbDZ pG6xKRTvMDRqKiFdd3arUQ8ewJGjKvmKnGWz1ZgCvo75uzGoiuGmKDkIF6FJb3/+ +8nnFdYjd5b2NhryhIawxeZphAyMfIgt6Le1mFGgg2EBOD6xhFWv3WOLGSV775uu 29Q0+tPTE1+o8Ed1mtgaS1mRB/huPCMOMJtJS4sZ70wRdCz6i1pcYhQgXr44O1lz JzZxhnl79Zz0v/rlRIX2EF7t41rvIf//wgoA6jIhI7B15eGPlfGUaU2tMGGf8yGu yTcmuPKzfR1g8GJzYpNT8wFawEFOe3x2dRjA2kUdvUR1FziNdrUNxwpVOOBuOlX5 efVLf2ms+OOyIOnbSyzMOXL55K7a4HnHacCEjEvzvt60m4ZM7hcRGEE5L8Hi9LGP z2eDwRtefK6bL4Pg3hjkpBtsG42Pr6y5904MRGtLqwvmtWlTF+txafwahXQALpSi 5QEdWTWMQdI/LBZ/1LWz =tFUM -----END PGP SIGNATURE-----

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[libvirt-users] libvirt events and Ruby's EventMachine
by Jonathan Barber 24 Jul '15

24 Jul '15

Hello, I'm trying to adopt the Ruby event example from here https://www.libvirt.org/ruby/examples/event_test.rb to use EventMachine (a library for writing event driven programs). I have attached my attempt, which appears subscribe to events but never executes the callbacks I provide. I know this because when I reset domains (virsh reset VM) I see messages appear from the Handlers::notify_readable(), which should then invoke Libvirt::event_invoke_handle_callback() - but the output from the callbacks never appears. Typical output from the program looks like: add_handle fd=11 events=1 add_timer interval=-1 :notify_readable id=0 fd=11 events=1 update_timer id=0 interval=0 :notify_readable id=0 fd=11 events=1 :notify_readable id=0 fd=11 events=1 ... When I enabled debugging by setting LIBVIRT_DEBUG to 1 the output from libvirt appears to be the same as event_test.rb (excluding memory addresses). Can anyone see where I'm going wrong? Many thanks -- Jonathan Barber <jonathan.barber(a)gmail.com>

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Re: [libvirt-users] virsh dominfo does not show correct cpuTime
by changqian zuo 24 Jul '15

24 Jul '15

I was getting vCPU use time outside of guest with libvirt-python API, and them calculate utilization with (cpuTime2 - cpuTime1) / (t2 - t1). I was not doing this inside the guest os. 2015-07-24 15:09 GMT+08:00 2020human <human2020(a)qq.com>: > You calculate is vCPU use time not utilization。 > > use_time/total_cpu_time is utilization。 > > total_cpu_time=`cat /proc/stat |sed -n '1p'|awk '{ print > sum=$2+$3+$4+$5+$6+$7+$8+$9+$10}'` > > > ------------------ 原始邮件 ------------------ > *发件人:* "changqian zuo";<zuochangqian(a)gmail.com>; > *发送时间:* 2015年7月24日(星期五) 中午1:51 > *收件人:* "libvirt-users"<libvirt-users(a)redhat.com>; > *主题:* [libvirt-users] virsh dominfo does not show correct cpuTime > > Hi, > > I am doing some domain resource monitoring work. I use > > cat /dev/urandom | md5sum > > to simulate vCPU load and write a script to calculate vCPU utilization. It > seems all good at the beginning. After I abort the ``cat ... md5sum`` > command in domain, I see some strange data as below: > > CPU time: 8410960000000 > CPU util: 99.8410609331% > CPU time: 8411970000000 > CPU util: 100.843672381% > CPU time: 8412380000000 > CPU util: 40.9336949531% > CPU time: 8412440000000 > CPU util: 5.9899303915% > *CPU time: 8412440000000* > *CPU util: 0.0%* > CPU time: 8412490000000 > CPU util: 4.99165856007% > *CPU time: 8412490000000* > *CPU util: 0.0%* > *CPU time: 8412490000000* > *CPU util: 0.0%* > CPU time: 8412570000000 > CPU util: 7.987195515% > *CPU time: 8412570000000* > *CPU util: 0.0%* > CPU time: 8412590000000 > CPU util: 1.99668576091% > CPU time: 8412670000000 > CPU util: 7.98700539474% > CPU time: 8412720000000 > CPU util: 4.99167281754% > CPU time: 8412780000000 > CPU util: 5.98888552548% > > Looking at those 0.0% lines. Strange, though the guest is running, cpuTime > does not increase. How can this happen? Any one helps? Thanks. > > Host information: > > - CentOS Linux release 7.0.1406 (Core) > - libvirt 1.2.8 > - qemu-kvm-rhev 2.1.2 > > ----- python script to capture cpu domain usage ---- > import libvirt > import time > > conn = libvirt.openReadOnly("qemu:///system") > dom = conn.lookupByName('cpu-test') > last_time = time.time() > last_cpu_time = dom.info()[4] > > while True: > time.sleep(1) > this_time = time.time() > dom_info = dom.info() > > print "CPU time: %s" % dom_info[4] > print "CPU util: %s%%" % ((dom_info[4] - last_cpu_time) / ((this_time - > last_time) * 10000000)) > > last_cpu_time = dom_info[4] > last_time = this_time > ----------------------------- end ----------------------------- > > >

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[libvirt-users] virsh dominfo does not show correct cpuTime
by changqian zuo 24 Jul '15

24 Jul '15

Hi, I am doing some domain resource monitoring work. I use cat /dev/urandom | md5sum to simulate vCPU load and write a script to calculate vCPU utilization. It seems all good at the beginning. After I abort the ``cat ... md5sum`` command in domain, I see some strange data as below: CPU time: 8410960000000 CPU util: 99.8410609331% CPU time: 8411970000000 CPU util: 100.843672381% CPU time: 8412380000000 CPU util: 40.9336949531% CPU time: 8412440000000 CPU util: 5.9899303915% *CPU time: 8412440000000* *CPU util: 0.0%* CPU time: 8412490000000 CPU util: 4.99165856007% *CPU time: 8412490000000* *CPU util: 0.0%* *CPU time: 8412490000000* *CPU util: 0.0%* CPU time: 8412570000000 CPU util: 7.987195515% *CPU time: 8412570000000* *CPU util: 0.0%* CPU time: 8412590000000 CPU util: 1.99668576091% CPU time: 8412670000000 CPU util: 7.98700539474% CPU time: 8412720000000 CPU util: 4.99167281754% CPU time: 8412780000000 CPU util: 5.98888552548% Looking at those 0.0% lines. Strange, though the guest is running, cpuTime does not increase. How can this happen? Any one helps? Thanks. Host information: - CentOS Linux release 7.0.1406 (Core) - libvirt 1.2.8 - qemu-kvm-rhev 2.1.2 ----- python script to capture cpu domain usage ---- import libvirt import time conn = libvirt.openReadOnly("qemu:///system") dom = conn.lookupByName('cpu-test') last_time = time.time() last_cpu_time = dom.info()[4] while True: time.sleep(1) this_time = time.time() dom_info = dom.info() print "CPU time: %s" % dom_info[4] print "CPU util: %s%%" % ((dom_info[4] - last_cpu_time) / ((this_time - last_time) * 10000000)) last_cpu_time = dom_info[4] last_time = this_time ----------------------------- end -----------------------------

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[libvirt-users] global lock when executing hook scripts
by Vasiliy Tolstov 23 Jul '15

23 Jul '15

Hello. I'm try to understand, why in case of 20 workers libvirt fully locked when runs qemu hook (when domain starts) virsh list freezes. As i understand in case of using more workers it utilized to run hooks too, but as i see in pstree only main libvirt process executes hook. Why this happening? pstree -a -p 6642 libvirtd,6642 -d -l ├─qemu,9272 /etc/libvirt/hooks/qemu testvm prepare begin - │ └─prepare,9468 -x /usr/local/prepare.sh testvm │ └─sleep,9469 5000 ├─{libvirtd},6643 ├─{libvirtd},6644 ├─{libvirtd},6645 ├─{libvirtd},6646 ├─{libvirtd},6647 ├─{libvirtd},6648 -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru

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