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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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