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[libvirt-users] Does virsh actually work?
by Gary Hook 04 Sep '14

04 Sep '14

I have been beating my head against a wall attempting to get virsh to migrate a simple VM from one host to another. I have two systems running Ubuntu 14.04 with libvirt 1.2.2. Yes, they are bridged. Non-shared storage. Modest guest VM that only requires 100G of disk space; there is far more available. In trying to accomplish even the simplest migration (per every page I can find from both the Fedore Project and Red Hat) I consistently get the following results: root@huey:/tmp# virsh list --all Id Name State ---------------------------------------------------- 9 e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f running - 81c50b5a-24ef-47d5-88ae-16ee7f4f9537 shut off - acd06610-c919-450b-97c8-8e49b9a0d45c shut off root@huey:/tmp# virsh migrate --live --p2p e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f qemu+ssh://10.10.11.204/system error: Failed to open file '/mnt/store01/virt/e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2': No such file or directory root@huey:/tmp# ls -al /mnt/store01/virt total 9140768 drwxr-xr-x 2 libvirt-qemu kvm 4096 Sep 3 10:17 . drwxr-xr-x 13 root root 4096 Aug 28 10:39 .. -rw-r--r-- 1 libvirt-qemu kvm 3271688192 Aug 29 14:39 81c50b5a-24ef-47d5-88ae-16ee7f4f9537.qcow2 -rw-r--r-- 1 libvirt-qemu kvm 2523136000 Aug 29 14:47 acd06610-c919-450b-97c8-8e49b9a0d45c.qcow2 -rw-r--r-- 1 libvirt-qemu kvm 3565486080 Sep 3 13:52 e7f75b9b-9ed4-4f7e-aa86-e481ab911d6f.qcow2 root@dewey:~ >ls -al /mnt/store01/virt total 8 drwxrwxrwx 2 libvirt-qemu kvm 4096 Sep 3 12:30 . drwxr-xr-x 13 root root 4096 Aug 29 16:36 .. root@dewey:~ > (huey is 10.10.11.203, dewey is 10.10.11.204; DNS works, but I thought to eliminate that as a source of this problem.) As can be seen, the .qcow2 files exists on the source system, and does not exist on the target system. The directory shown is where images are to be stored. There is no problem starting and stopping VMs on the systems. It is not at all clear where the failure is occurring; there is no documentation that discusses this failure, of course. I believe that I am invoking a basic migration per every page I can find in a web search. Please correct any errors. I am working as root on both systems, and use ssh to get from one system to another, no passwords, no authentication required. All works well. Any observations, or suggestions as to what configuration parameters I should check, would be greatly appreciated. Thank you. Gary

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[libvirt-users] How to have a directory and its subdirectories as a storage pool
by Marc Haber 04 Sep '14

04 Sep '14

Hi, I would like to use btrfs subvolumes as storage place for VM images to use snapshots. Unfortunately, this does not seem to work in virt-manager at least since the "filesystem directory" storage pool type does not allow me to descend into subdirectories. Is there a trick to do this? Can I do it with virsh, or in the XML? Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402 Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600420

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[libvirt-users] Network reconfiguration glitch after migration
by Joaquim Barrera 03 Sep '14

03 Sep '14

Hello everyone, I have the following scenario: * 2 host machines (H1 and H2) running VMs. I execute migrations (QEMU) from one host to the other, and so on. The migrations are done in a dedicated LAN (eth1 in both hosts) while regular department LAN runs on eth0 * 1 computer (my desktop computer) also connected to this common LAN on eth0. The VMs have a Python script sending UDP packets to my desktop computer (which has the server part of the Python script), every 250 ms, to be able to mesure downtime and other stuff. Once I run a live migration from H1 to H2, I would expect the downtime to be in the order of ms, or maybe a few seconds, but it takes something like 10 to 20 seconds on average for the packets to resume arriving at my computer. One could think about the network reconfiguration delay, or other reasons, but here comes the tricky part: If I have a ping running on the destination host to the internal IP that the VM is supposed to have once the migration is done, the UDP packets resume just a few ms after the migration os done. Is like: if the VM only has outgoing connections, it takes a lot of time to resume its operation, but if it has some incoming connection, the network resumes very quick. I know it may sound wierd, but maybe there is a clear reason for this issue. Any ideas? Thank you!

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[libvirt-users] libvirt ignores ip setting when creating a xen domU?
by Kim Larry 02 Sep '14

02 Sep '14

Hi, I'm currently writing a script to avoid ip conflict but I couldn't get ip address from xenstore when I create a guest using libvirt with libxl connector. With 'xl create' command, it works everything fine, but not with libvirt. So I dug into the source code, I couldn't find any code for declaring x_nic->ip field in libxlMakeNic(). Or I just created XML file the wrong way? Here is a part of domain XML: <interface type="bridge"> <mac address="00:16:3e:51:6b:19" /> <protocol family="ipv4"> <ip address="10.0.1.119" prefix="24" /> <route gateway="10.0.1.1"/> </protocol> <source bridge="virbr0" /> </interface> Hope someone can help me out. - Larry

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[libvirt-users] How can I get the pid mapping relationship between the container and the native OS
by WANG Cheng D 01 Sep '14

01 Sep '14

Dear all, I want to dynamically change the CPU affinity of multiple processes/threads started in a container. Changing affinity operation is done in native OS. My problem is how to obtain the mapping relationship between the two pids owned by the process/thread. As you know, one pid is given by the container, which is different from the corresponding pid seen by the native OS. Thank you in advance. Cheng

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[libvirt-users] DHCP and Secure Containers
by Gene Czarcinski 30 Aug '14

30 Aug '14

I have been "playing with" Secure Containers running a lighttpd server and have it up and running. I used Adam's process (https://www.happyassassin.net/2014/07/23/bridged-networking-for-libvirt-wit…) for getting a bridge defined when also running NetworkManager. I then created a virtual network definition: > <network> > <name>net18</name> > <uuid>8d19a05b-ac85-4e2a-88bc-5ca4cbb29a33</uuid> > <forward mode='bridge'/> > <bridge name='br0'/> > </network> This works fine when I use static addresses such as: > -N source=net18,address=192.168.18.94/24,route=192.168.18.255%192.168.18.1 but does not work when I specify using dhcp: > -N source=net18,dhcp I have reported this as a bug: https://bugzilla.redhat.com/show_bug.cgi?id=1133686 Since there has not been much of a reaction to the BZ report, I decided to take a look at the source code (it sure would have been nice if the SRPMS were there in the F20 fedora-virt-preview but I get the package from development/21). I see that libvirt-sandbox-init-common.c has the code for starting dhcp and also has main() along with some runtime options for -v verbose and -d debug. OK, how do I go about turning verbose and/or debug on? Any suggestions on how to debug and get dhcp to work? Is this the correct mailing list? Gene

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[libvirt-users] CPU flag masking not working with xen
by Nathan March 29 Aug '14

29 Aug '14

Hi, Trying to get CPU masking working with xen and it's just stubbornly refusing to work. Spawning a VM with xm directly works fine, but every time I try with libvirt it just ends up having all the flags of the host. Looking at the xen logs, libvirt doesn't appear to be passing any cpu options to xen at all. Running centos 6.5 with the xen 4 packages (4.2.4), but I've also tried building the latest libvirt 1.2.8-r1 from source and still the same thing. I am seeing these errors out of libvirt, but not sure if they're related: 2014-08-28 17:39:02.815+0000: 22674: error : xenHypervisorDoV2Sys:1013 : Unable to issue hypervisor ioctl 3166208: Permission denied If I spawn a VM directly with XM and use libvirt to dumpxml it, or try the domxml-from-native then libvirt just drops all the CPU info. I'm pretty sure I've got the xml correct though as it passes validation with virt-xml-validate: http://pastebin.com/aBUQckhc I've tried everything I can think of and just not getting anywhere at all, can anyone point me into the right direction for what the issue might be? Thanks! - Nathan

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[libvirt-users] Hook for qemu: traffic shaping
by Romain Hardouin 29 Aug '14

29 Aug '14

Hi all, If some people use generic ethernet interface and want to set traffic shaping, I made a libvirt hook for qemu: https://github.com/rhardouin/libvirt_hooks Of course, this is a workaround. I recently started to work on a fix but in the meantime this hook will do the trick and maybe it could help someone else. Feel free to fork it if you think about any improvements. Cheers, Romain IRC: romainh

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[libvirt-users] Cputune causing VM to show usage as hardware interrupts
by Tyler Wilson 28 Aug '14

28 Aug '14

Hey All, What is the correct method for using cputune to use a percentage of a host core? From testing I currently have period set to 10,000 and quota set to 3,500. This gets me 35% of a used core on the host (36 3.4 2:42.20 qemu-system-x86) however when running stress inside the VM I am showing this usage in top;w %Cpu(s): 0.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 35.2 hi, 0.0 si, 64.8 st Is this the intended result or are my numbers incorrect for this goal? I am running libvirtd 1.2.2. Thanks for the assist.

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[libvirt-users] Progressively worsening unresponsiveness
by Michael Warnecke 28 Aug '14

28 Aug '14

Hello all, I'm new to the list, and hoping someone can point me in the right direction. I've got an Ubuntu 14 dom0 with, what I think, are excellent specs. 12 cores, hyperthreaded, VT, 64GB RAM, gobs of disk, etc... all to run 8 virtual machines (at the moment). My problem is each of the guests - Windows, Ubuntu, FreeBSD, starts out working fine. After several minutes, the guest becomes unresponsive for a moment, and comes back. As time goes on, this happens more, and more frequently, and longer and longer until after about a day the guest is completely useless, and needs a shutdown, and start. The dom0 is NEVER unresponsive. I've tried to track this down through every means I have available, and have come up empty handed. Here is some of what I've done so far, please let me know what other information would help to debug this: 1. I've set guest OS processor to be default, and copied from host. Neither made any noticable difference. 2. I've switched all disks and network to be VirtIO. Big improvement over IDE, but the unresponsive problem persists. 3. Linux guests have the following in dmesg: hrtimer: interrupt took 10109276 ns [sched_delayed] sched: RT throttling activated 4. I found nothing suspicious in the dom0's dmesg. 5. Unresponsiveness does not correlate with disk usage. 6. Host uses 4 disks in software RAID-5 (yes I know I'm bad, but there are reasons) using BTRFS. 7. Guest disks are all raw. Please let me know if there is some other useful information, or if you have an idea where I should look next. Thanks!

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[libvirt-users] Compile error on centos 7 : undefined reference to `virConnectNetworkEventRegisterAnyCheckACL'
by mxs kolo 27 Aug '14

27 Aug '14

Hi all Centos 7.0.1406, 3.10.0-123.el7.x86_64 Configure libvirt-1.2.7 as: ./configure --prefix=/usr --with-xen=no --with-qemu=no --with-openvz=no --with-vmware=no --with-esx=no --with-parallels=no --with-bhyve=no --with-uml=no --with-vbox=no --with-selinux=no make ... make[3]: Entering directory `/usr/local/src/libvirt-1.2.7/daemon' CC libvirtd-remote.o CCLD libvirtd libvirtd-remote.o: In function `remoteRelayDomainEventCheckACL': /usr/local/src/libvirt-1.2.7/daemon/remote.c:157: undefined reference to `virConnectDomainEventRegisterAnyCheckACL' libvirtd-remote.o: In function `remoteRelayNetworkEventCheckACL': /usr/local/src/libvirt-1.2.7/daemon/remote.c:184: undefined reference to `virConnectNetworkEventRegisterAnyCheckACL' collect2: error: ld returned 1 exit status make[3]: *** [libvirtd] Error 1 make[3]: Leaving directory `/usr/local/src/libvirt-1.2.7/daemon' make[2]: *** [all] Error 2 make[2]: Leaving directory `/usr/local/src/libvirt-1.2.7/daemon' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/usr/local/src/libvirt-1.2.7' make: *** [all] Error 2 I trying build libvirt-remote.0 manualy, by added file ../src/.libs/libvirt_driver_access.a where function virConnectDomainEventRegisterAnyCheckACL defined. But as result libvirtd cant' start with multiple errrors: Aug 25 19:00:54 arvis systemd: Starting LSB: daemon for libvirt virtualization API... Aug 25 19:00:54 journal: libvirt version: 1.2.7 Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_network.so /usr/lib/libvirt/connection-driver/libvirt _driver_network.so: undefined symbol: virConnectListAllNetworksCheckACL Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_storage.so /usr/lib/libvirt/connection-driver/libvirt _driver_storage.so: undefined symbol: virConnectListAllStoragePoolsCheckACL Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_nodedev.so /usr/lib/libvirt/connection-driver/libvirt _driver_nodedev.so: undefined symbol: virConnectListAllNodeDevicesCheckACL Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_secret.so /usr/lib/libvirt/connection-driver/libvirt_ driver_secret.so: undefined symbol: virConnectListAllSecretsCheckACL Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_nwfilter.so /usr/lib/libvirt/connection-driver/libvir t_driver_nwfilter.so: undefined symbol: virConnectNumOfNWFiltersCheckACL Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_interface.so /usr/lib/libvirt/connection-driver/libvi rt_driver_interface.so: undefined symbol: virConnectNumOfDefinedInterfacesCheckACL Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_qemu.so /usr/lib/libvirt/connection-driver/libvirt_dr iver_qemu.so: undefined symbol: virConnectListDomainsCheckACL Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_lxc.so /usr/lib/libvirt/connection-driver/libvirt_dri ver_lxc.so: undefined symbol: virConnectListDomainsCheckACL Aug 25 19:00:54 journal: failed to load module /usr/lib/libvirt/connection-driver/libvirt_driver_uml.so /usr/lib/libvirt/connection-driver/libvirt_dri ver_uml.so: undefined symbol: virConnectListDomainsCheckACL b.r. Maxim Kozin

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[libvirt-users] Building virt-top to SLES 11 SP3
by cjlove＠san.rr.com 26 Aug '14

26 Aug '14

Hi all, I was curious whether anyone has successfully built virt-top (version 1.0.8) on SUSE SLES11 SP3. SUSE's ocaml support is rather limited, so I've built ocaml 4.00.1 from source and installed the necessary dependencies using Opam. I'm still running into a compile error on virt_top.ml, line 697: Error: This expression has type int -> D.typed_param list array but an expression was expected of type (string * D.typed_param_value) list array As a frame of reference I was able to build virt-top 1.0.8 from source on a Fedora Core 20 box with the necessary ocaml -devel RPMs installed (also ocaml 4.00.1), so I don't know if I'm running into other dependency issues or something else. The ocaml-libvirt package version 0.6.1.2 compiles successfully, which suggests that SLES 11 SP3 has a sufficient version of libvirt. Thanks in advance, Chris

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[libvirt-users] Remote connection. Get URI
by Pavel Khrulev 25 Aug '14

25 Aug '14

Hello. I have an app (virt-manager) for remote connection to server where libvirtd is running. When I make a new connection with uri (qemu+tcp://paul@172.16.111.20/system) I want to know username (paul here) on the side of server. But an object virConnectPtr has URI (qemu:///system ) on the remote server. Why and how I can know username on the server's side?

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[libvirt-users] NetworkManager and bridged networking
by Gene Czarcinski 24 Aug '14

24 Aug '14

Adam Williamson (adamw) has done a fine job at determining how to get bridged networking working with NetworkManager: https://www.happyassassin.net/2014/07/23/bridged-networking-for-libvirt-wit… According to Adam, he did the work on Fedora 21 whereas I did it on Fedora 20. the undesirable features (problems) I found may be corrected on F21 but I believe that they have not been fixed. While Adam's procedure for creating a bridge definition for NetworkManager using the Gnome or nm-connection-editor are basically correct. However, The virt-manager & libvirt do not "like" the default names. [*not a show stopper but it should be fixed*] Instead, the the bridge definition, use "br0" for the connection name and the device name. For the "slave" definition (the real physical NIC), use the <physical_device_name> such as p33p1 or p4p1 or em0 or whatever. I then rebooted the host to make sure everything was clean and the netowrk came up fine on br0. Then, using virt-manager, I took an existing VM, deleted the virtual NIC, added a new virtual NIC using br0. After booting up the VM, you need to edit its network configuration to delete the existing definition and add a new one pointing to the new virtual NIC. This works!!! And on Fedora 20 ... oops, not quite Fedora 20. This was done on a Fedora 20 host which as the updates from fedora-virt-preview applied. I still have a system without the preview updates so I will go back and see if it works or it needs the preview updates. Gene

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[libvirt-users] vlan tags filtered in linux bridge interfaces?
by Dennis Jacobfeuerborn 23 Aug '14

23 Aug '14

Hi, I've set up a virtual machine and plugged it into a bridge on the host. When i configure an ip for eth0 in the guest i can ping other machines fine but when I add an interface eth0.10 in the guest and add an ip pings using this interface do not work. When using tcpdump in vnet0 on the host I can see the icmp packets when I ping using eth0 in the guest but not when I use the eth0.10 interface. Do tagged packets get filtered by libvirt and can this be disabled so that packets just get forwarded without such filtering? Regards, Dennis

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[libvirt-users] How to enable SELinux driver for libvirt?
by Qiang Guan 22 Aug '14

22 Aug '14

Hi guys, It seems libvirt disable SELinux driver by default. How to enable SELinux driver for libvirt? -- ------------ Jackie Best Regards

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[libvirt-users] virt-sandbox-service
by Gene Czarcinski 22 Aug '14

22 Aug '14

Is there any documentation/tutorial that explains how to use virt-sandbox-service? After looking at some writeups about virt-sandbox-service, this looks like a good tool for something I need to do. But, following the "examples" I cannot get anything to work correctly. With a simple xfce install with httpd, lighttpd, and libvirt-sandbox installed, I tried: 1. virt-sandbox-service create -C -u lighttpd.service webserver1 which produced a python traceback?? 2. virt-sandbox-service create -C -u httpd.service webserver2 Which appeared to work correctly but when I tried: virt-sandbox-service start webserver2 I got an error message saying that "start" was not valid??? 3. On another system with lighttpd and httpd already installed and able to run, I updated libvirt and friends to the preview version. My virtual systems seem to run OK. I then installed libvirt-sandbox and tried: virt-sandbox-service create -C -u httpd.service tstserver which got some error messages about sockets. I assume that this stuff has to work for someone. HELP! Gene

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[libvirt-users] virsh snapshot
by Adam King 22 Aug '14

22 Aug '14

Hi, I had a 'domain' called APP03. I was performing auto snapshots each night using /usr/bin/virsh snapshot-create APP03 . I then wanted the domain to be called APP01 for clarity's sake, so I did virsh dumpxml APP03 > APP03.xml, edited the name to APP01 and changed the ID. I then did virsh define APP03.xml to get APP01. I have now realised that the qcow2 images are huge (1.1TB image but 80G inside the virtual machine), I am assuming this is the snapshots tagged onto the virtual hard disk? How do I reduce the size of those back to something realistic? I've removed old snapshots from APP03 using virsh snapshot-delete APP03 '<snapshotidnumber> Hope this makes sense

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[libvirt-users] Reboot, halt, poweroff called inside an lxc domain
by Michal Witanowski 21 Aug '14

21 Aug '14

Hi all, Is there any possibility (using libvirt C API or whatever else) to "propagate" shutdown events (reboot, halt, power off) to a host? The API seems to lack this functionality - there exists function virConnectDomainEventRegisterAny, but the virDomainEventStoppedDetailType enum does not distinguish between these 3 different situations. Moreover, while rebooting a machine, an additional argument can be passed to reboot() syscall, which will be used by bootloader during the startup. Ideally, when calling e.g. "reboot recovery" inside an lxc container I'd like to be informed (inside host) that "reboot" was called with "recovery" as additional argument, so I can take appropriate actions. Thanks in advance. Best regards, Michal

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[libvirt-users] failed to initialize directx in w7
by arnaud gaboury 21 Aug '14

21 Aug '14

I am not sure this issue is tight to Red Hat qxl GPU driver, but I can't initialize directxX on a guest windows 7. Trying to start a game, I get the error message : Failed to initialize directX Of course, directX is installed on the w7 guest, and properly. The dxdiag command, a directx diagnostic tool, does not show any error. Some summary under the video : Driver name : Red Hat QXL GPU Processor type : SeaBIOS VBEC(C) 2011 No Directx functionality are available (Direct Draw, Direct3D, AGP texture) I am not a windows expert, but I would like to know if DirectX is compatible with QXL driver. If not, what is the process to be able to run directX on the windows guest ? If both are compatible, what did I miss ? The VM is working perfectly with virtio & qxl. Please find below my virt-install command: ----------------------------- virt-install --connect qemu:///system --name=tintinWinoz --memory 4096 --cpu host-model-only --os-variant=win7 --disk /myVM/tintin --boot cdrom,hd --virt-type kvm --graphics spice --controller scsi,model=virtio-scsi --cdrom /dev/cdrom --disk /drawer/myIso/w7.iso,device= cdrom ----------------------------------------------------- I thereafter installed manually from the w7 guest virtio & qxl drivers. Thank you for advises.

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[libvirt-users] Libvirt Java API to get CPU usage of VM (KVM)
by Restituto Marcus Arevalo 21 Aug '14

21 Aug '14

Hi all libvirt-users, Is there a counterpart on Java of the function virDomainGetCPUStats that is based on C API? Because I am trying to create a program based on java to get the CPU usage of a Guest/Domain/VM in KVM using the Libvirt Java API. Honestly, I am having a hard time in starting my program. I have no idea where to start. I mean, what functions do I need to get the CPU usage of the guest/domain in KVM? I know there are other options but I am avoiding in connecting to the VM through SSH and get the CPU usage. To make things easier to understand, I need to know how the Virtual Machine Manager in Linux is able to output a graph of the CPU usage of EACH VM. I really need help. I have no idea where to start. Any suggestions would be much appreciated. I'll try to post a screenshot of the graph later. regards, Marco

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[libvirt-users] disable-ticketing
by mhd 20 Aug '14

20 Aug '14

hi... where usually disable-ticketing is avaliable in vm xml ???? i use this command virsh edit vmname and i can edit any options and added but when add this option to <graphics> as example : <graphics disable-ticketing='yes'> or <graphics> <disable-ticketing /> </graphics> nothing happened the file return to first status only this option ... if i add passwd in <graphics> is took as example: <graphics passwd='111111'> it's work and vm xml is edited...

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[libvirt-users] virt-install: failed to initialize KVM: Permission denied
by arnaud gaboury 20 Aug '14

20 Aug '14

As a regular user, member of the libvirt group, I run this command to create a basic VM: virt-install --connect qemu:///system --name=test --ram 2048 --cpu host-model-only --os-variant=win7 --disk /myVM/test --boot cdrom,hd --virt-type kvm --graphics spice --controller scsi,model=virtio-scsi --cdrom=/drawer/myIso/w8.iso It returns an error : --------------------------------- Starting install... ERROR internal error: process exited while connecting to monitor: Could not access KVM kernel module: Permission denied failed to initialize KVM: Permission denied --------------------------------- $ getfacl /dev/kvm # file: dev/kvm # owner: root # group: kvm user::rw- user:martinus:rw- group::rw- mask::rw- other::--- The command return seems to indicate rights are correct. $ lsmod return kvm & kvm_intel are loaded. If I run the virt-install with qemu:///session, I do not have this issue and can create the VM. I found many entries about the KVM permission issue, but with no clear answer to solve it. Thank you for any suggestion -- google.com/+arnaudgabourygabx

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[libvirt-users] Guest vlan trunk port networking issues
by Dennis Jacobfeuerborn 20 Aug '14

20 Aug '14

Hi, I'm having trouble getting networking to work and I'm not sure what I'm doing wrong. The network interface of the host is connected to a switch-port that is configured as trunk and allows tagged traffic for vlan id 10. The host itself has the interfaces eth1.10 and eth1 defined. eth1.10 is configured with the primary ip address of the host system and eth1 is slave of the bridge br1. I installed a guest with a virtual network interface that is added to br1 the idea being that I can define an interface eth0.10 in the guest and have the tagged traffic forwarded this way: (guest) eth0.10 (packet gets tagged with id 10) -> (host) vnet0 -> (host) br1 -> (host) eth1 -> network The issue is that when I do a ping in the guest I see the arp request on eth1 with tcpdump but no response as if the packet doesn't reach its target. Normaly at this poing I would suspect the switchport configuration but when I ping the same IP from the host (which has an IP in the same network on interface eth1.10) this ping works fine. Does anybody have experience with this and maybe an idea why the host can reach the ip in vlan 10 but the guest can not? Could this be a routing issue that the system somehow discards the packets flowing through eth1 directly because there also is an interface eth1.10 present? Regards, Dennis

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[libvirt-users] How to install libvirt-python from source code?
by Can Zhang 19 Aug '14

19 Aug '14

Hi, I’d like to install a latest version libvirt on CentOS 6.5. I compiled libvirt, it worked well and then I tried to install libvirt-python. The version is libvirt-python-1.2.7, and I used `python setup.py build` and `sudo python setup.py install` to install. But in python, I get errors like: ========== >>> import libvirt Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib64/python2.6/site-packages/libvirt.py", line 28, in <module> raise lib_e ImportError: /usr/lib64/python2.6/site-packages/libvirtmod.so: undefined symbol: virTypedParamsAddBoolean ========== Someone would help? Best regards, Can Zhang

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