April 2020 - Users - libvirt List Archives

[libvirt-users] [virtual interface] detach interface during boot succeed with no changes
by Yalan Zhang 08 Sep '22

08 Sep '22

Hi guys, when I detach an interface from vm during boot (vm boot not finished), it always fail. I'm not sure if there is an existing bug. I have confirmed with someone that for disk, there is similar behavior, if this is also acceptable? # virsh destroy rhel7.2; virsh start rhel7.2 ;sleep 2; virsh detach-interface rhel7.2 network 52:54:00:98:c4:a0; sleep 2; virsh dumpxml rhel7.2 |grep /interface -B9 Domain rhel7.2 destroyed Domain rhel7.2 started Interface detached successfully <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </controller> <interface type='network'> <mac address='52:54:00:98:c4:a0'/> <source network='default' bridge='virbr0'/> <target dev='vnet0'/> <model type='rtl8139'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> When I detach after the vm boot, expand the sleep time to 10, it will succeed. # virsh destroy rhel7.2; virsh start rhel7.2 ;sleep 10; virsh detach-interface rhel7.2 network 52:54:00:98:c4:a0; sleep 2; virsh dumpxml rhel7.2 |grep /interface -B9 Domain rhel7.2 destroyed Domain rhel7.2 started Interface detached successfully ------- Best Regards, Yalan Zhang IRC: yalzhang Internal phone: 8389413

3 4

Set hostname of guest during installation time
by john doe 05 Nov '20

05 Nov '20

Hi, I would like to set the hostname when installing a guest, with the below command the hostname is not set to 'try06' in the guest: virt-install --name=try06 --graphic none --pxe --network bridge=virbr0 How can I set the hostname of the guest during installation time? I realy appriciate the support I'm getting in here, I'm fairly new to libvirt. -- John Doe

4 24

[libvirt-users] Live migrate + change interface name
by Marc Roos 07 Oct '20

07 Oct '20

Is it possible to do a live migrate of a guest, having on the from host a source_device=eth2 and to host a source_dev=eth1?

2 4

[libvirt-users] Add Virtlyst to the list of libvirt users
by Daniel Nicoletti 23 Sep '20

23 Sep '20

Hi, I've just released v1.0.0 of Virtlyst[1] a web tool to manage VMs using Qt/C++/Cutelyst https://dantti.wordpress.com/2018/04/19/announcing-virtlyst-a-web-interface… Thanks. 1 - https://github.com/cutelyst/Virtlyst -- Daniel Nicoletti KDE Developer - http://dantti.wordpress.com

4 5

guest-fsfreeze-freeze freezes all mounted block devices
by Marc Roos 09 Aug '20

09 Aug '20

I wondered if anyone here can confirm that virsh qemu-agent-command domain '{"execute":"guest-fsfreeze-freeze"}' Freezes all mounted block devices filesystems. So if I use 4 block devices they are all frozen for snapshotting. Or just the root fs?

5 15

[libvirt-users] Question about disabling UFO on guest
by Bao Nguyen 05 Aug '20

05 Aug '20

Hello everyone, I would like to ask a question regarding to disable UFO of virtio vNIC in my guest. I have read the document at https://libvirt.org/formatdomain.html *host* The csum, gso, tso4, tso6, ecn and ufo attributes with possible values on and off can be used to turn off host offloading options. By default, the supported offloads are enabled by QEMU. *Since 1.2.9 (QEMU only)* The mrg_rxbuf attribute can be used to control mergeable rx buffers on the host side. Possible values are on (default) and off. *Since 1.2.13 (QEMU only)* *guest* The csum, tso4, tso6, ecn and ufo attributes with possible values on and off can be used to turn off guest offloading options. By default, the supported offloads are enabl ed by QEMU. *Since 1.2.9 (QEMU only)* Then I disabled UFO on my vNIC on guest as the following configuration <devices> <interface type='network'> <source network='default'/> <target dev='vnet1'/> <model type='virtio'/> <driver name='vhost' txmode='iothread' ioeventfd='on' event_idx='off' queues='5' rx_queue_size='256' tx_queue_size='256'> *<host gso='off' ufo='off' />* *<guest ufo='off'/>* </driver> </interface> </devices> Then I reboot my node to get the change effect and it works. However, can I disable the UFO without touching the host OS? or it always has to disable on both host and guest like that? Thanks, Brs, Natsu

2 1

Could you please help with questions about the net failover feature
by Yalan Zhang 09 Jul '20

09 Jul '20

Hi laine, I have leave some questions on IRC, but my VPN broken time after time. Please ignore the questions on IRC. In my understanding, the standby and primary hostdev interface may be in different subnet. I'm not sure whether it is correct. Could you please help to explain? Thank you in advance. For example, primary hostdev is connected to vf-pool with <pf='eth0'/>, while the standby is connected to NAT network with " forward dev='eth0'". The standby interface will get ip as 192.168.122.x, but after NAT, it will be in the same subnet of the vf. So after the VF is unplugged, the packet will still broadcast in the same subnet, and the vm will get the packet as the standby share the same mac. Right? Thank you! ------- Best Regards, Yalan Zhang IRC: yalzhang

4 7

plug pre-created tap devices to libvirt guests
by Miguel Duarte de Mora Barroso 30 Jun '20

30 Jun '20

Hi all, I'm aware that it is possible to plug pre-created macvtap devices to libvirt guests - tracked in RFE [0]. My interpretation of the wording in [1] and [2] is that it is also possible to plug pre-created tap devices into libvirt guests - that would be a requirement to allow kubevirt to run with less capabilities in the pods that encapsulate the VMs. I took a look at the libvirt code ([3] & [4]), and, from my limited understanding, I got the impression that plugging existing interfaces via `managed='no' ` is only possible for macvtap interfaces. Would you be able to shed some light into this ? Is it possible on libvirt-5.6.0 to plug pre-created tap devices to libvirt guests ? [0] - https://bugzilla.redhat.com/show_bug.cgi?id=1723367 [1] - https://bugzilla.redhat.com/show_bug.cgi?id=1723367#c2 [2] - https://bugzilla.redhat.com/show_bug.cgi?id=1723367#c3 [3] - https://github.com/libvirt/libvirt/blob/master/src/qemu/qemu_interface.c#L4… [4] - https://github.com/libvirt/libvirt/blob/master/src/qemu/qemu_interface.c#L4…

3 7

qemu hook: event for source host too
by Guy Godfroy 23 Jun '20

23 Jun '20

Hello, this is my first time posting on this mailing list. I wanted to suggest a addition to the qemu hook. I will explain it through my own use case. I use a shared LVM storage as a volume pool between my nodes. I use lvmlockd in sanlock mode to protect both LVM metadata corruption and concurrent volume mounting. When I run a VM on a node, I activate the desired LV with exclusive lock (lvchange -aey). When I stop the VM, I deactivate the LV, effectively releasing the exclusive lock (lvchange -an). When I migrate a VM (both live and offline), the LV has to be activated on both source and target nodes, so I have to use a shared lock (lvchange -asy). That's why I need a hook event on the source host too (as far as I know after my tests, the migration event is only triggered on the target host). Is such a feature a possibility? Thanks for your attention. Guy Godfroy

2 13

Migrate to a bigger disk possible?
by Paul van der Vlis 11 Jun '20

11 Jun '20

Hello, I have a qcow2 disk what needs to become increased. I don't have space on the location where it is now to have it two time, so I want to live-migrate it to another host. On the other host I have to create a qcow2 disk before I can migrate. What would happen when I would create there a bigger qcow2 disk then the original one? Can I resize the filesystem after the migration? With regards, Paul van der Vlis -- Paul van der Vlis Linux systeembeheer Groningen https://www.vandervlis.nl/

3 9

Re: USB-hotplugging fails with "failed to load cgroup BPF prog: Operation not permitted" on cgroups v2
by Pavel Hrdina 13 May '20

13 May '20

On Mon, Jan 20, 2020 at 09:00:15PM +0100, Pol Van Aubel wrote: > Hi, > > Quoting Pavel Hrdina (2020-01-20 14:29:36) > > On Sat, Jan 18, 2020 at 11:17:11PM +0100, Pol Van Aubel wrote: > > > Hi all, > > > > > > I've disabled cgroups v1 on my system with the kernel boot option > > > "systemd.unified_cgroup_hierarchy=1". Since doing so, USB hotplugging > > > fails to work, seemingly due to a permissions problem with BPF. Please > > > note that the technique I'm going to describe worked just fine for > > > hotplugging USB devices to running domains until this change. > > > Attaching / detaching USB devices when the domain is down still works as > > > expected. > > > > > > I get the same error when attaching a device in virt-manager, as I do > > > when running the following command: > > > > > > sudo virsh attach-device wenger /dev/stdin --persistent <<END > > > <hostdev mode='subsystem' type='usb' managed='yes'> > > > <source startupPolicy='optional'> > > > <vendor id='0x046d' /> > > > <product id='0xc215' /> > > > </source> > > > </hostdev> > > > END > > > > > > This returns > > > error: Failed to attach device from /dev/stdin > > > error: failed to load cgroup BPF prog: Operation not permitted > > > > > > > > > virt-manager returns basically the same error, but for completeness' > > > sake, here it is: > > > > > > failed to load cgroup BPF prog: Operation not permitted > > > > > > Traceback (most recent call last): > > > File "/usr/share/virt-manager/virtManager/addhardware.py", line 1327, in _add_device > > > self.vm.attach_device(dev) > > > File "/usr/share/virt-manager/virtManager/object/domain.py", line 920, in attach_device > > > self._backend.attachDevice(devxml) > > > File "/usr/lib/python3.8/site-packages/libvirt.py", line 590, in attachDevice > > > if ret == -1: raise libvirtError ('virDomainAttachDevice() failed', dom=self) > > > libvirt.libvirtError: failed to load cgroup BPF prog: Operation not permitted > > > > > > > > > Now, libvirtd is running as root, so I don't understand why any > > > operation on BPF programs is not permitted. I've dug into libvirt's code > > > a bit to see what is throwing this error and it boils down to > > > <https://github.com/libvirt/libvirt/blob/7d608469621a3fda72dff2a89308e68cc9f…> > > > and > > > <https://github.com/libvirt/libvirt/blob/02bf7cc68bfc76242f02d23e73cad36618f…> > > > but I have no clue what that syscall is doing, so that's where my > > > debugging capability basically ends. > > > > > > Maybe this is something as simple as setting the right ACL somewhere. I > > > haven't touched /etc/libvirt/qemu.conf except for setting nvram. There > > > *is* something about cgroup_device_acl there but afaict that's for > > > cgroups v1, when there was still a device cgroup controller. Any help > > > would be greatly appreciated. > > > > > > > > > Domain log files: > > > Upon execution of the above commands, nothing gets added to the domain > > > log in /var/log/qemu/wenger.log, so I've decided they're likely > > > irrelevant to the issue. Please ask for any additional info required. > > > > > > > > > System information: > > > Arch Linux, (normal) kernel 5.4.11 > > > libvirt 5.10.0 > > > qemu 4.2.0, using KVM. > > > Host system is x86_64 on an intel 5820k. > > > Guest system is probably irrelevant, but is Windows 10 on the same. > > > > > > > > > Possibly relevant kernel build options: > > > $ zgrep BPF /proc/config.gz > > > [22:55:52]: zgrep BPF /proc/config.gz > > > > > > CONFIG_CGROUP_BPF=y > > > CONFIG_BPF=y > > > CONFIG_BPF_SYSCALL=y > > > CONFIG_BPF_JIT_ALWAYS_ON=y > > > CONFIG_IPV6_SEG6_BPF=y > > > CONFIG_NETFILTER_XT_MATCH_BPF=m > > > # CONFIG_BPFILTER is not set > > > CONFIG_NET_CLS_BPF=m > > > CONFIG_NET_ACT_BPF=m > > > CONFIG_BPF_JIT=y > > > CONFIG_BPF_STREAM_PARSER=y > > > CONFIG_LWTUNNEL_BPF=y > > > CONFIG_HAVE_EBPF_JIT=y > > > CONFIG_BPF_EVENTS=y > > > # CONFIG_BPF_KPROBE_OVERRIDE is not set > > > # CONFIG_TEST_BPF is not set > > > > Hi > > > > I've installed clean archlinux to try this out and it works as expected, > > I'm able to attach USB device into a VM. > > > > My system env is mostly the same as yours except for kernel version: > > > > kernel 5.4.13 > > libvirt 5.10.0 > > qemu 4.2.0, using KVM. > > > > Please enable libvirt debug logs [1] and share the output with us. > > I've updated to 5.4.13 and created a barebones VM without storage to > reproduce the behaviour. libvirtd debug logs are attached. There appear > to be two BPF failures of the same BPF program (?). The first is on line > 23209, which appears to be part of machine startup, and which I don't > actually notice. The second one is where I manually add the USB device, > on line 30599. > > Thanks, Thanks for the logs, but it did not help to figure out where the issue is. I was hoping to see some error output from the syscall but the line that should contain it is empty: 2020-01-20 19:47:15.589+0000: 8579: debug : virBPFLoadProg:78 : Can you please check system logs and output of dmesg? I've managed to run into this article [1] that explains that even if you have all permissions and no SELinux you can still be blocked by something called kernel_lockdown and it should appear in dmesg. Pavel [1] <https://gehrcke.de/2019/09/running-an-ebpf-program-may-require-lifting-the-…>

2 3

Libvirt APIs for creating virtual networks
by Santhosh Kumar Gunturu 08 May '20

08 May '20

I am using the Libvirt APIs to create the virtual networks to use the dnsmasq capabilities. I want to understand the APIs how to set the lease time in XML to control the dnsmasq lease time. Also, I need some DHCP statistics on the virtual network. Is there any API available to fetch the statistics ? Please let me know if any ? Thanks & Regards Santhosh Kumar Gunturu

3 6

sync guest time
by Miguel Duarte de Mora Barroso 30 Apr '20

30 Apr '20

Hi, I'm seeing the following issue when attempting to update the guest's clock on a running fc32 guest (using guest agent): ``` [root@virt-launcher-vmi-masquerade-mh2xm /]# virsh domtime 1 --pretty Time: 2020-04-30 23:27:29 [root@virt-launcher-vmi-masquerade-mh2xm /]# virsh domtime 1 --sync error: internal error: unable to execute QEMU agent command 'guest-set-time': hwclock failed to set hardware clock to system time # now, this one works. [root@virt-launcher-vmi-masquerade-mh2xm /]# virsh domtime 1 --now [root@virt-launcher-vmi-masquerade-44v2x /]# virsh domtime 1 --pretty Time: 2020-04-30 11:15:45 ``` This is the simplest reproducer I could come with; the original issue is this call to libvirt's `setTIme` in [0]. Is there any workaround I could try ? Am I doing something wrong here ? [0] - https://github.com/kubevirt/kubevirt/blob/6bb516148ce4c29825ae74f473e022075…

2 3

Re: [Query] Facing issue in build libvirt6.0 on ubuntu 1804
by Michal Privoznik 30 Apr '20

30 Apr '20

[Please keep the list CCed] On 4/30/20 12:02 PM, Ramesh B wrote: > Hi Michal, > > Thanks for quick response. > > Ubuntu: 18.04.3 LTS > QEMU emulator version 4.2.0 > libvirtd (libvirt) 4.0.0 > > I have lunched the guest os using QEMU. > I would like to use the virsh commands to get the status / control of > guest OS. > when i run any virsh commands not getting any response from QEMU. > When i tried to explore, found the solution saying use of QEMU monitor > will help. > added the below command while lunch, > -chardev > socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-freebsd11.0/monitor.sock,server,nowait > -mon chardev=charmonitor,id=monitor,mode=control > > but result in below mentioed error: > Failed to bind socket to > /var/lib/libvirt/qemu/domain-freebsd11.0/monitor.sock > > Then thought of building libvirt 6.0 version, will help to solve the > problem. Ah, so you wanted to use 'virsh qemu-attach' to attach libvirt to a running qemu. Yeah, it needs a monitor. However, the functionality was not maintained and probably not functional anyway so we've removed in the 5.5.0 release. > > Please guide me to solve this problem. > > Regards, > Babu B > But what's interesting is that you are unable to build. Which package is providing the rst2* binaries? Are their up to date? Michal

2 5

[Query] Facing issue in build libvirt6.0 on ubuntu 1804
by Ramesh B 30 Apr '20

30 Apr '20

Hi all, I am trying to build libvirt 6.0 on ubuntu OS 18.04. Facing one issue libvirt source compilation. ============================================ <stdin>:215: (ERROR/3) Error in "code-block" directive: 1 argument(s) required, 0 supplied. .. code-block:: help [command-or-group] <stdin>:229: (ERROR/3) Error in "code-block" directive: 1 argument(s) required, 0 supplied. .. code-block:: =========================================== *Source:* https://libvirt.org/sources/libvirt-6.0.0.tar.xz *Build Command*: $ mkdir build && cd build $ ../configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var $ make $ sudo make install Need help in solving the build error. is it possible to install libvirt package without build if yes please share the command/procedure/link. Thanks, Ramesh

3 6

why libvirtd can not list the running domain?
by 崔涛的个人邮箱 30 Apr '20

30 Apr '20

1. I run a user domain like this: [root@kvm1 ~]# qemu-system-x86_64 -enable-kvm -m 1G -smp 4 /images/test1.img WARNING: Image format was not specified for '/images/test1.img' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to remove the restrictions. VNC server running on ::1:5900 2. Then, I install and using my user domain. 3. Then, I login to libvirtd on my hosts,but can not get the user domain using list command. [root@kvm1 ~]# virsh -c qemu:///system Welcome to virsh, the virtualization interactive terminal. Type: 'help' for help with commands 'quit' to quit virsh # virsh # virsh # list Id Name State ---------------------------------------------------- virsh #

2 2

"failed to setup INTx fd: Operation not permitted" error when using PCI passthrough
by Riccardo Ravaioli 30 Apr '20

30 Apr '20

Hi, I'm on a Dell VEP 1405 running Debian 9.11 and I'm running a few tests with various interfaces given in PCI passthrough to a qemu/KVM Virtual Machine also running Debian 9.11. I noticed that only one of the four I350 network controllers can be used in PCI passthrough. The available interfaces are: *# dpdk-devbind.py --status Network devices using kernel driver ==============================* *===== 0000:02:00.0 'I350 Gigabit Network Connection 1521' if=eth2 drv=igb unused=igb_uio,vfio-pci,uio_* *pci_generic 0000:02:00.1 'I350 Gigabit Network Connection 1521' if=eth3 drv=igb unused=igb_uio,vfio-pci,uio_* *pci_generic 0000:02:00.2 'I350 Gigabit Network Connection 1521' if=eth0 drv=igb unused=igb_uio,vfio-pci,uio_* *pci_generic 0000:02:00.3 'I350 Gigabit Network Connection 1521' if=eth1 drv=igb unused=igb_uio,vfio-pci,uio_* *pci_generic 0000:04:00.0 'QCA986x/988x 802.11ac Wireless Network Adapter 003c' if= drv=ath10k_pci unused=igb_uio,vfio-pci,uio_* *pci_generic 0000:05:00.0 'Device 15c4' if=eth7 drv=ixgbe unused=igb_uio,vfio-pci,uio_* *pci_generic 0000:05:00.1 'Device 15c4' if=eth6 drv=ixgbe unused=igb_uio,vfio-pci,uio_* *pci_generic 0000:07:00.0 'Device 15e5' if=eth5 drv=ixgbe unused=igb_uio,vfio-pci,uio_* *pci_generic 0000:07:00.1 'Device 15e5' if=eth4 drv=ixgbe unused=igb_uio,vfio-pci,uio_**pci_generic* If I try PCI passthrough on 02:00.2 (eth0), it works fine. With any of the remaining three interfaces, libvirt fails with this error: *# virsh create vnf.xml error: Failed to create domain from vnf.xml error: internal error: process exited while connecting to monitor: 2020-04-06T16:08:47.048266Z qemu-system-x86_64: -device vfio-pci,host=02:00.1,id=**hostdev0,bus=pci.0,addr=0x5: vfio 0000:02:00.1: failed to setup INTx fd: Operation not permitted* The contents of vnf.xml are available here: https://pastebin.com/rT3RmAi5 This is what happened in *dmesg* when I tried to start the VM: *[ 7305.371730] igb 0000:02:00.1: removed PHC on eth3 [ 7307.085618] ACPI Warning: \_SB.PCI0.PEX2._PRT: Return Package has no elements (empty) (20160831/nsprepkg-130) [ 7307.085717] pcieport 0000:00:0b.0: can't derive routing for PCI INT B [ 7307.085719] vfio-pci 0000:02:00.1: PCI INT B: no GSI [ 7307.369611] igb 0000:02:00.1: enabling device (0400 -> 0402) [ 7307.369668] ACPI Warning: \_SB.PCI0.PEX2._PRT: Return Package has no elements (empty) (20160831/nsprepkg-130) [ 7307.369764] pcieport 0000:00:0b.0: can't derive routing for PCI INT B [ 7307.369766] igb 0000:02:00.1: PCI INT B: no GSI [ 7307.426266] igb 0000:02:00.1: added PHC on eth3 [ 7307.426269] igb 0000:02:00.1: Intel(R) Gigabit Ethernet Network Connection [ 7307.426271] igb 0000:02:00.1: eth3: (PCIe:5.0Gb/s:Width x2) 50:9a:4c:ee:9f:b1 [ 7307.426350] igb 0000:02:00.1: eth3: PBA No: 106300-000 [ 7307.426352] igb 0000:02:00.1: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s)* These are all the messages related to that device in dmesg before I tried to start the VM: *# dmesg | grep 02:00.1 [ 0.185301] pci 0000:02:00.1: [8086:1521] type 00 class 0x020000 [ 0.185317] pci 0000:02:00.1: reg 0x10: [mem 0xdfd40000-0xdfd5ffff] [ 0.185334] pci 0000:02:00.1: reg 0x18: [io 0xd040-0xd05f] [ 0.185343] pci 0000:02:00.1: reg 0x1c: [mem 0xdfd88000-0xdfd8bfff] [ 0.185434] pci 0000:02:00.1: PME# supported from D0 D3hot D3cold [ 0.185464] pci 0000:02:00.1: reg 0x184: [mem 0xdeea0000-0xdeea3fff 64bit pref] [ 0.185467] pci 0000:02:00.1: VF(n) BAR0 space: [mem 0xdeea0000-0xdeebffff 64bit pref] (contains BAR0 for 8 VFs) [ 0.185486] pci 0000:02:00.1: reg 0x190: [mem 0xdee80000-0xdee83fff 64bit pref] [ 0.185488] pci 0000:02:00.1: VF(n) BAR3 space: [mem 0xdee80000-0xdee9ffff 64bit pref] (contains BAR3 for 8 VFs) [ 0.334021] DMAR: Hardware identity mapping for device 0000:02:00.1 [ 0.334463] iommu: Adding device 0000:02:00.1 to group 16 [ 0.398809] pci 0000:02:00.1: Signaling PME through PCIe PME interrupt [ 2.588049] igb 0000:02:00.1: PCI INT B: not connected [ 2.643900] igb 0000:02:00.1: added PHC on eth1 [ 2.643903] igb 0000:02:00.1: Intel(R) Gigabit Ethernet Network Connection [ 2.643905] igb 0000:02:00.1: eth1: (PCIe:5.0Gb/s:Width x2) 50:9a:4c:ee:9f:b1 [ 2.643984] igb 0000:02:00.1: eth1: PBA No: 106300-000 [ 2.643986] igb 0000:02:00.1: Using MSI-X interrupts. 4 rx queue(s), 4 tx queue(s) [ 2.873544] igb 0000:02:00.1 rename3: renamed from eth1 [ 2.939352] igb 0000:02:00.1 eth3: renamed from rename3* In particular this looks suspicious: *igb 0000:02:00.1: PCI INT B: not connected* The full dmesg is available here: https://pastebin.com/kPbUAKCi This is the PCI bus structure: *# lspci -tv -[0000:00]-+-00.0 Intel Corporation Device 1980 +-04.0 Intel Corporation Device 19a1 +-05.0 Intel Corporation Device 19a2 +-06.0-[01]----00.0 Intel Corporation Device 19e2 +-0b.0-[02-03]--+-00.0 Intel Corporation I350 Gigabit Network Connection | +-00.1 Intel Corporation I350 Gigabit Network Connection | +-00.2 Intel Corporation I350 Gigabit Network Connection | \-00.3 Intel Corporation I350 Gigabit Network Connection +-0f.0-[04]----00.0 Qualcomm Atheros QCA986x/988x 802.11ac Wireless Network Adapter +-12.0 Intel Corporation DNV SMBus Contoller - Host +-13.0 Intel Corporation DNV SATA Controller 0 +-15.0 Intel Corporation Device 19d0 +-16.0-[05-06]--+-00.0 Intel Corporation Device 15c4 | \-00.1 Intel Corporation Device 15c4 +-17.0-[07-08]--+-00.0 Intel Corporation Device 15e5 | \-00.1 Intel Corporation Device 15e5 +-18.0 Intel Corporation Device 19d3 +-1c.0 Intel Corporation Device 19db +-1f.0 Intel Corporation DNV LPC or eSPI +-1f.2 Intel Corporation Device 19de +-1f.4 Intel Corporation DNV SMBus controller \-1f.5 Intel Corporation DNV SPI Controller* By looking at lspci -v, there's something going on with the IRQ field exactly in three devices I can't use in PCI passthrough ("IRQ -2147483648"): *# lspci -v|grep -A1 I350 02:00.0 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01) Flags: bus master, fast devsel, latency 0, IRQ -2147483648 -- 02:00.1 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01) Flags: bus master, fast devsel, latency 0, IRQ -2147483648 -- 02:00.2 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01) Flags: bus master, fast devsel, latency 0, IRQ 18 -- 02:00.3 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01) Flags: bus master, fast devsel, latency 0, IRQ -2147483648* Finally, every i350 interface has its own IOMMU group in /sys/kernel/iommu_groups/. The kernel I'm using in the host machine is 4.9.189 and my libvirt version is 4.3.0. Any thoughts on this? Is there something I should enable in the BIOS or in the kernel to make this work? Thanks! Regards, Riccardo Ravaioli

1 1

Attaching DVD-writer
by Andreas Thörn 27 Apr '20

27 Apr '20

I want to add my dvd and be able to burn dvd’s. I’ve tried every solution I could find, but nothing works. In my xml i have: <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <source dev='/dev/sr0'/> <target dev='sdb' bus='sata'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> In my guest (windows 10) it’s shown as "QEMU QEMU DVD-ROM” .. which of course means I can’t burn. If anyone has a solution it would be this mailing list Thanks Andreas

4 5

domain: how long is new xml in saved file
by Vincent Wu 27 Apr '20

27 Apr '20

Hi administrator, I am a cloud compute developer. I need some help from you about libvirt. I have a work to modify a image file which is saved by virDomainSave() or virDomainSaveFlags(). So virDomainSaveImageGetXMLDesc() and virDomainSaveImageDefineXML() are APIs I choosed to do. Because I found a sentence: A save file can be inspected or modified slightly with virDomainSaveImageGetXMLDesc() and virDomainSaveImageDefineXML(). But an error is happened when I do like that.  libvirt: QEMU Driver error: operation failed: new xml too large to fit in file. I found that if I increase strlen(xml_old) to strlen(xml_new). if (strlen(xml_new) - strlen(xml_old) <= 29) { this is right; } but if (strlen(xml_new) - strlen(xml_old) >= 50) { this is error; } But I don't choose to find an accurate number.  I think this value will be affected by some factors. For example: memory alignment, range safety or other rules. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +                                                           strlen(xml_old)                                                  +  free space  + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +                                                             strlen(xml_new)                                                                     + ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ I really want to know how long free space I can use. Can you convert slightly to a precise number? Thank you for taking so long to read my Email. Looking forward to your reply. ps: OS: CentOS7.4 libvirt: 4.5.0 hypervisor: KVM Sincerely,  Vincent Wu

5 5

Not able to add pcie card to guest: Operation not permitted
by Mauricio Tavares 25 Apr '20

25 Apr '20

Let's say I have libvirt [root@vmhost2 ~]# virsh version Compiled against library: libvirt 4.5.0 Using library: libvirt 4.5.0 Using API: QEMU 4.5.0 Running hypervisor: QEMU 2.12.0 [root@vmhost2 ~]# running on centos 8 and then I have this card [root@vmhost2 ~]# virsh nodedev-dumpxml pci_0000_01_00_0 <device> <name>pci_0000_01_00_0</name> <path>/sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0</path> <parent>pci_0000_00_01_0</parent> <driver> <name>mlx4_core</name> </driver> <capability type='pci'> <domain>0</domain> <bus>1</bus> <slot>0</slot> <function>0</function> <product id='0x1003'>MT27500 Family [ConnectX-3]</product> <vendor id='0x15b3'>Mellanox Technologies</vendor> <iommuGroup number='1'> <address domain='0x0000' bus='0x00' slot='0x01' function='0x0'/> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </iommuGroup> <pci-express> <link validity='cap' port='8' speed='8' width='8'/> <link validity='sta' speed='5' width='8'/> </pci-express> </capability> </device> which I added to the guest (arch='x86_64' machine='pc-q35-rhel7.6.0') as <hostdev mode='subsystem' type='pci' managed='yes'> <source> <address domain='0x0000' bus='0x01' slot='0x00' function='0x0'/> </source> <address type='pci' domain='0x0000' bus='0x08' slot='0x00' function='0x0'/> </hostdev> When I try to start the guest I get the following error message: [root@vmhost2 ~]# virsh start testfedora error: Failed to start domain testfedora error: internal error: qemu unexpectedly closed the monitor: 2020-04-24T20:01:35.341020Z qemu-kvm: -device vfio-pci,host=01:00.0,id=hostdev0,bus=pci.8,addr=0x0: vfio error: 0000:01:00.0: failed to setup INTx fd: Operation not permitted [root@vmhost2 ~]# Why is it telling me that is not permitted?

2 3

Virsh migrate and paused vm
by Paras Pradhan 24 Apr '20

24 Apr '20

Hello I have a question regarding virsh migrate. I see this when I migrate a vm using the command --- virsh --connect=xen:///system migrate --live --verbose vm1 xen+ssh://node2/system --- I see the vm keeps running on node1 and on node2 its paused. Libvirt version is 5.1.0-8.11.6.x86_64 and hypervisor is Xen 4.12. No issues when running --- xl migrate vm1 node2 --- Any help is appreciated. Thanks P

2 1

php libvirt show active snapshot
by Todd Lewis 21 Apr '20

21 Apr '20

Is php libvirt able to list the active snapshot for the vm? I can easily take snapshots and restore snapshots, but I can't figure out how to display the currently active snapshot using php libvirt. -- Todd Lewis Grizzly Star (469) 363-2907 Cell www.grizzlystar.com

3 7

My VMs don't get IP with libvirt and dnsmasq
by Computers Issues 17 Apr '20

17 Apr '20

Hello there, I wanted to share a problem I'm having with libvirt, for the case someone here could know how to solve it. I'm using an Ubuntu 18.04 LTS, I have libvirtd already installed and I think I got all the dependencies installed. So, I'm using virsh net-create to create this network: <network> <name>pepito</name> <forward mode='nat'/> <bridge name='virbr2' stp='on' delay='0'/> <ip address='192.168.150.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.150.2' end='192.168.150.254'/> </dhcp> </ip> </network> And then I create a domain with this xml: <domain type='qemu' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> <name>ARM</name> <memory unit='KiB'>262144</memory> <currentMemory unit='KiB'>262144</currentMemory> <os> <type arch='armv7l' machine='virt-2.9'>hvm</type> <kernel>~/zImage</kernel> <cmdline>console=ttyAMA0 root=/dev/vda</cmdline> <boot dev='hd'/> </os> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-aarch64</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file=' ~/rootfs.qcow2'/> <target dev='hda' bus='virtio'/> </disk> <controller type='virtio-serial' index='0'> <address type='virtio-mmio'/> </controller> <interface type='network'> <mac address='52:54:00:09:a4:37'/> <model type='virtio'/> <source network='pepito'/> <address type='virtio-mmio'/> </interface> </devices> <qemu:commandline> <qemu:arg value='-device'/> <qemu:arg value='virtio-net-pci'/> <qemu:arg value='-netdev'/> <qemu:arg value='user,id=net1'/> </qemu:commandline> </domain> They both work as I created them in a different computer and everything works. But I'm trying it on my other Ubuntu machine, and once virsh creates the network and the domain, my VM never get an IP from that DHCP range. This is libvirtd log: abr 17 00:48:11 usuario-System-Product-Name dnsmasq-dhcp[13741]: DHCP, IP range 192.168.150.2 -- 192.168.150.254, lease time 1h abr 17 00:48:11 usuario-System-Product-Name dnsmasq-dhcp[13741]: DHCP, sockets bound exclusively to interface virbr2 abr 17 00:48:11 usuario-System-Product-Name dnsmasq[13741]: reading /etc/resolv.conf abr 17 00:48:11 usuario-System-Product-Name dnsmasq[13741]: using nameserver 127.0.0.53#53 abr 17 00:48:11 usuario-System-Product-Name dnsmasq[13741]: read /etc/hosts - 7 addresses abr 17 00:48:11 usuario-System-Product-Name dnsmasq[13741]: read /var/lib/libvirt/dnsmasq/pepito.addnhosts - 0 addresses abr 17 00:48:11 usuario-System-Product-Name dnsmasq-dhcp[13741]: read /var/lib/libvirt/dnsmasq/pepito.hostsfile Does anybody know why it could be that the VM never gets an IP from the range I defined? As I said, exactly the same configuration worked in a different machine, I don't know why it does not work here. Thank you so much!! <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Libre de virus. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

3 8

Ovs error when starting vm: ovs-vsctl: 'del-port' command requires at least 1 arguments
by Thomas Pircher 16 Apr '20

16 Apr '20

Hi, my system got updated to libvirt 6.0.0 (from 5.6.0) this morning, and now I'm having problems starting VMs that make use of openvswitch portgroups. When I start a VM, I get this error message on virsh: > virsh # start testvm > error: Failed to start domain testvm > error: An error occurred, but the cause is unknown The system log contains: > Mar 30 09:45:39 tplinux ovs-vsctl[2763]: ovs|00001|db_ctl_base|ERR|'del-port' command requires at least 1 arguments > Mar 30 09:45:39 tplinux libvirtd[735]: internal error: Child process (ovs-vsctl --timeout=5 -- --if-exists del-port) unexpected exit status 1: ovs-vsctl: 'del-port' command requires at least 1 arguments > Mar 30 09:45:39 tplinux libvirtd[735]: internal error: Unable to delete port (null) from OVS My network "test-net" looks like: > <network> > <name>test-net</name> > <forward mode='bridge'/> > <bridge name='test-net'/> > <virtualport type='openvswitch'/> > <portgroup name='fabric' default='yes'> > <vlan trunk='yes'> > <tag id='10' nativeMode='untagged'/> > <tag id='20'/> > <tag id='30'/> > <tag id='40'/> > <tag id='50'/> > <tag id='60'/> > <tag id='70'/> > </vlan> > </portgroup> > </network> And the network in the domain xml file is: > <interface type='network'> > <mac address='01:23:45:67:89:ab'/> > <source network='test-net' portgroup='fabric'/> > <model type='e1000'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> > </interface> I didn't see any change in the changelog related to ovs or portgroups. Is there something I need to change in my VM definition? Thanks, Thomas

2 3

FYI: upstream bug reporting now using https://gitlab.com/libvirt
by Daniel P. Berrangé 16 Apr '20

16 Apr '20

In keeping with our general aim to consolidate libvirt project infrastructure services on GitLab, we now wish to have issues for upstream libvirt projects reported on the appropriate https://gitlab.com/libvirt/ repository issue tracker. For further details see: https://libvirt.org/bugs.html Bugs against OS distro provided binary packages should continue to be filed against the OS distros' own bug trackers unless the problem is known to also affect current upstream libvirt versions. Note that as part of this change, the "Virtualization Tools" component on bugzilla.redhat.com has been updated to remove the ability to file new bugs against libvirt related components. Existing bugs there still exist in bugzilla, but new bugs can only be filed against gitlab.com. Over time we hope to triage old bugs and close those that are either invalid, or those not likely to be addressed given current maintainer resources available. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|

1 0

what a correct use for virConnectDomainEventRegisterAny API, how to Obtain a stable expected result
by thomas.kuang 15 Apr '20

15 Apr '20

HI, everyone: My target deal with network hotplug use virDomainDetachDeviceFlags. Because when the API return ,the network maybe doesn’t remove from my vm guest os. So I use virConnectDomainEventRegisterAny to register an event ID: VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED , my process as follow: cb_para->call_id=virConnectDomainEventRegisterAny(cb_para->conn,cb_para->dom,VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED, VIR_DOMAIN_EVENT_CALLBACK(vnf_control_del_network_cb), cb_para, vnf_control_del_network_cb_free); flags |= VIR_DOMAIN_AFFECT_CONFIG; if (virDomainIsActive(dom) == 1) { flags |= VIR_DOMAIN_AFFECT_LIVE; } ret = virDomainDetachDeviceFlags(dom, xml, flags); above code write in thread loop ,then in the same loop : while (1) { mission = vnf_mission_queue_get(task); if (mission == NULL) { sleep(1); continue; } vnf_op_process(&mission->info); // this will deal with network hotplug,will call virConnectDomainEventRegisterAny then call virDomainDetachDeviceFlags if (mission) { vnf_mission_free(mission); } if(virEventRunDefaultImpl() < 0) { // at here process the registered callback for event-registered printf();.... } } My problem is: some time , the virEventRunDefaultImpl can trigger the vnf_control_del_network_cb callback ,but some time there is nothing ,as if the VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED has lost. what cause the Unpredictable behavior ? what is a correct use for virConnectDomainEventRegisterAny ? if can't trigger the vnf_control_del_network_cb callback , the memory :cb_para will mem-leak, so in order to deal the execpt ,i register a timer to process the VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED timeout cb_para->timer_id = virEventAddTimeout(cb_para->time_out, vnf_control_del_network_timeout_cb, cb_para, vnf_control_del_network_cb_free); thought use the timer ,can i avoid the cb_para mem-leak, but fail to achive hotplug network .

2 2

Connections Driver VirtualBox
by claudia freitas 14 Apr '20

14 Apr '20

Good Morning! My name is Cláudia, I'm trying to use the Connections to VirtualBox driver from libvirt.org on Pacemaker to start a virtual machine created with the VirtualBox hypervisor, so far I haven't been successful. Could you send me a practical example of how to use the driver with the VirtualDomain feature in Pacemaker? The examples I found only demonstrate the use with Xen and Qemu. Thanks,

2 1

cloud-init libvirt
by PunkGeek 14 Apr '20

14 Apr '20

is there any way to use cloud-init configs in python libvirt? cloud-init require to create an iso, which seems that ovirt support cloud-config: https://red.ht/2K1gBkn But how can I do that by python libvirt? I know I can mount iso by python libvirt to the VM, but the process of creating iso file is the problem which if it is possible to enter the cloud-config commands by libvirt could be better to me. Regards

3 2

Running libvirtd on windows
by Dhananjay Joshi 14 Apr '20

14 Apr '20

Hi I have downloaded virt-viewer package for windows 10 to run the libvirt framework on windows .When I try to run the virt-viewer facing the issue of not getting the libvirtd URI to connect as below: Any pointers on how to run libvirtd on windows would help... [cid:4d4f58c1-09b4-4ee8-9d66-a9ab91cf1cd2] This message contains information that may be privileged or confidential and is the property of the KPIT Technologies Ltd. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. KPIT Technologies Ltd. does not accept any liability for virus infected mails.

2 1

python equivalent for virDomainGetGuestInfo()
by Joe Muro 09 Apr '20

09 Apr '20

Hi, I am using python apis. I can't seem to find equivalent python function for virDomainGetGuestInfo() https://libvirt.org/html/libvirt-libvirt-domain.html#virDomainGetGuestInfo I have qemu-guest-agent running on the guest, and want to extract os information.

2 1

PolKit rule and API matchaccess_drivers = [ "polkit" ]
by Θεοφάνης Κοντογιάννης 08 Apr '20

08 Apr '20

Hi All, I am trying to implement the following use case. User sfrag is logged on the host via ssh. Running 'virsh list --all' should trigger PolKit authentication and present ALL domains suffixed with -SF I have used and adapted the example from: libvirt.org Git - libvirt.git/blob - examples/polkit/libvirt-acl.rules | | | | | | | | | | | libvirt.org Git - libvirt.git/blob - examples/polkit/libvirt-acl.rules | | | Adapted the setup so that I included user sfrag. Always the user was asked to authenticate via root and not via SELF but ONLY if running "virsh -c qemu:///system list --all" Had to change /etc/libvirt/libvirtd.conf to include: auth_unix_ro = "polkit"access_drivers = [ "polkit" ]log_filters="1:access.accessdriverpolkit"log_outputs="1:file:/var/log/libvirt/libvirtd.log" All polkit rules for user sfrag was removed at this point. Now the user sfrag running 'virsh list --all' gives no output to /var/log/libvirt/libvirtd.log or /var/log/secure. Running the same as user root gives interesting results in the logs: org.libvirt.api.connect.getattrorg.libvirt.api.connect.search-domainsorg.libvirt.api.domain.getattr (fore every defined domain)org.libvirt.api.domain.read (again for every defined domain). Virsh is using qemu:///session as the default URI. Why running virsh as non-root is not triggering polkit or any API calls (based on log files output) and running the same as root, gives all the interesting output? Which implies that running virsh as root results in different actions compaired to calling it as non root. Thank you for Your time. BR Theophanis Kontogiannis

1 0

Getting Intel RDT cache allocation status from libvirt?
by Neil Moore 08 Apr '20

08 Apr '20

Is there a way to get the current cache allocation status of a host from libvirt, via API or virsh? I've seen some references to a 'virsh nodecachestats' command in some patches from 2017 that doesn't seem to exist, and I see that 'virsh domstats --cpu-total <domain>' has similar information but seems to be focused on cache monitoring information rather than the allocation status. Thanks, Neil

1 0

when virEventAddTimeout trigger timeout ,should in the callback call virConnectDomainEventDeregisterAny ?
by thomas.kuang 08 Apr '20

08 Apr '20

hi, all I do a hotplug detach a network in a thread, because virDomainDetachDeviceFlags maybe asynchronous, so I do like follow: cb_para->cluster_id = info->cluster_id; cb_para->group_id = info->group_id; cb_para->vsys_id = info->vsysid; cb_para->vnf_id = info->vnf_id; cb_para->conn = conn; cb_para->time_out = 20*1000;//20s cb_para->call_id = virConnectDomainEventRegisterAny(conn, dom, VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED, VIR_DOMAIN_EVENT_CALLBACK(vnf_control_del_network_cb), cb_para, vnf_control_del_network_cb_free); flags |= VIR_DOMAIN_AFFECT_CONFIG; if (virDomainIsActive(dom) == 1) { flags |= VIR_DOMAIN_AFFECT_LIVE; } cb_para->timer_id = virEventAddTimeout(cb_para->time_out, vnf_control_del_network_timeout_cb, cb_para, vnf_control_del_network_cb_free); ret = virDomainDetachDeviceFlags(dom, xml, flags); //above run in a thread function void vnf_control_del_network_cb(virConnectPtr conn, virDomainPtr dom, const char *dev,void * opaque) { struct vnf_del_netwk_opaque * arg = (struct vnf_del_netwk_opaque *)opaque; if(0 == virConnectDomainEventDeregisterAny(conn, arg->call_id)) { VNF_DBG("succ to deRegister, conn:%p, call id:%d\n", conn, arg->call_id); } else { VNF_DBG("fail to deRegister, conn:%p, call id:%d\n", conn, arg->call_id); } .................... virEventRemoveTimeout(arg->timer_id); } void vnf_control_del_network_timeout_cb(int timer, void *opaque) { struct vnf_del_netwk_opaque * arg = (struct vnf_del_netwk_opaque *)opaque; ................ if(0 == virConnectDomainEventDeregisterAny(arg->conn, arg->call_id)) { //here, dead lock ,are thoses APIs not correct using ?? VNF_DBG("succ to deRegister, conn:%p, call id:%d\n", arg->conn, arg->call_id); } else { VNF_DBG("fail to deRegister, conn:%p, call id:%d\n", arg->conn, arg->call_id); } virEventRemoveTimeout(arg->timer_id); } (gdb) i threads Id Target Id Frame 7 Thread 0x7f29fa5ff700 (LWP 104950) "vnfd" 0x00007f2a064f656d in nanosleep () from /lib64/libc.so.6 6 Thread 0x7f29f9bfe700 (LWP 104951) "vnfd" 0x00007f2a0761851d in __lll_lock_wait () from /lib64/libpthread.so.0 5 Thread 0x7f29f8dff700 (LWP 104952) "vnfd" 0x00007f2a064f656d in nanosleep () from /lib64/libc.so.6 4 Thread 0x7f29f7fff700 (LWP 104953) "vnfd" 0x00007f2a064f656d in nanosleep () from /lib64/libc.so.6 3 Thread 0x7f29f71ff700 (LWP 104954) "vnfd" 0x00007f2a064f656d in nanosleep () from /lib64/libc.so.6 2 Thread 0x7f29f63ff700 (LWP 104955) "vnfd" 0x00007f2a064f656d in nanosleep () from /lib64/libc.so.6 * 1 Thread 0x7f2a087f8900 (LWP 104946) "vnfd" 0x00007f2a06530183 in epoll_wait () from /lib64/libc.so.6 (gdb) thread 6 [Switching to thread 6 (Thread 0x7f29f9bfe700 (LWP 104951))] #0 0x00007f2a0761851d in __lll_lock_wait () from /lib64/libpthread.so.0 (gdb) bt #0 0x00007f2a0761851d in __lll_lock_wait () from /lib64/libpthread.so.0 #1 0x00007f2a07613e1b in _L_lock_812 () from /lib64/libpthread.so.0 #2 0x00007f2a07613ce8 in pthread_mutex_lock () from /lib64/libpthread.so.0 #3 0x00007f2a072a1a0e in remoteConnectClose () from /lib64/libvirt.so.0 #4 0x00007f2a072b2740 in virConnectDispose () from /lib64/libvirt.so.0 #5 0x00007f2a0710bbab in virObjectUnref () from /lib64/libvirt.so.0 #6 0x00007f2a07195577 in virObjectEventCallbackFree () from /lib64/libvirt.so.0 #7 0x00007f2a07196532 in virObjectEventStateDeregisterID () from /lib64/libvirt.so.0 #8 0x00007f2a07287238 in remoteConnectDomainEventDeregisterAny () from /lib64/libvirt.so.0 #9 0x00007f2a072d36d7 in virConnectDomainEventDeregisterAny () from /lib64/libvirt.so.0 #10 0x0000000000405bce in vnf_control_del_network_timeout_cb (timer=<optimized out>, opaque=0x7f29e9e99de0) at vnf_mgt/vnf_control.c:1293 #11 0x00007f2a070d20e9 in virEventPollRunOnce () from /lib64/libvirt.so.0 #12 0x00007f2a070d0a42 in virEventRunDefaultImpl () from /lib64/libvirt.so.0 #13 0x000000000040d099 in vnf_worker_proc (arg=<optimized out>) at vnf_mgt/vnf_control.c:1727 #14 0x00007f2a07611e25 in start_thread () from /lib64/libpthread.so.0 #15 0x00007f2a0652fbad in clone () from /lib64/libc.so.6 (gdb) f 10 #10 0x0000000000405bce in vnf_control_del_network_timeout_cb (timer=<optimized out>, opaque=0x7f29e9e99de0) at vnf_mgt/vnf_control.c:1293 1293 if(0 == virConnectDomainEventDeregisterAny(arg->conn, arg->call_id)) { (gdb) p arg->time_id There is no member named time_id. (gdb) set print pretty (gdb) p *arg $1 = { cluster_id = 0, vsys_id = 0, group_id = 2, vnf_id = 1, call_id = 0, timer_id = 16, time_out = 20000, conn = 0x7f29f8013000 } (gdb) quit A debugging session is active.

1 0

Getting Intel RDT cache allocation status from libvirt?
by Neil Moore 07 Apr '20

07 Apr '20

Is there a way to get the current cache allocation status of a host from libvirt, via API or virsh? I've seen some references to a 'virsh nodecachestats' command in some patches from 2017 that doesn't seem to exist, and I see that 'virsh domstats --cpu-total <domain>' has similar information but seems to be focused on cache monitoring information rather than the allocation status. Thanks, Neil

1 0

why virConnectDomainEventRegisterAny can't alway trigger the callback ,how can i get a stable callback ?
by thomas.kuang 07 Apr '20

07 Apr '20

hi, all: I create a vm with six nic, after the vm start, i delete tree nics. all the three nic delete logic will happen in a thread , every nic delete has the following process: int vnf_control_del_network(void *arg) { 。。。。。 call_id = virConnectDomainEventRegisterAny(conn, dom, VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED, VIR_DOMAIN_EVENT_CALLBACK(vnf_control_del_network_cb), cb_para, vnf_control_del_network_cb_free); flags |= VIR_DOMAIN_AFFECT_CONFIG; if (virDomainIsActive(dom) == 1) { flags |= VIR_DOMAIN_AFFECT_LIVE; } ret = virDomainDetachDeviceFlags(dom, xml, flags); // detach a nic from vm guest os 。。。。 } void vnf_control_del_network_cb(virConnectPtr conn, virDomainPtr dom, const char *dev,void * opaque) //this callback can't already trigger to run ，why ? { struct vnf_del_netwk_opaque * arg = (struct vnf_del_netwk_opaque *)opaque; ........ do someing; if(0 == virConnectDomainEventDeregisterAny(conn, arg->call_id)) printf("succ to deRegister, conn:%p, call id:%d\n", conn, arg->call_id); else printf("fail to deRegister, conn:%p, call id:%d\n", conn, arg->call_id) } void* vnf_worker_proc(void *arg) { vnf_mission_t *mission = NULL; pthread_t tid = pthread_self(); vnf_task_ctx_t *task = vnf_task_get_task_info(tid); assert(task); pthread_detach(tid); while (1) { mission = vnf_mission_queue_get(task); if (mission == NULL) { sleep(1); continue; } VNF_IMAGE_DBG("tid:%lu, get one mission from mission queue\n", tid); vnf_op_process(&mission->info); //this cause vnf_control_del_network called if (mission) { vnf_mission_free(mission); } if(virEventRunDefaultImpl() < 0) { VNF_IMAGE_DBG("virEventRunDefaultImpl() called failure\n"); } } return NULL; }

1 0

libvirt remote uri format
by Joe Muro 06 Apr '20

06 Apr '20

Hi, I am using python libvirt api to get domain information. When using a uri without specifying the socket path, an error occurs. uri = "qemu+ssh://myuser@some.kvm.host/system" conn = libvirt.open(uri) This results in the following: libvirt: XML-RPC error : internal error: received hangup event on socket If I append the socket path to the URI, it works. e.g. qemu+ssh://myuser@some.kvm.host/system?socket=/var/run/libvirt/libvirt-sock Is this the recommended way to construct an ssh uri? My concern is that the socket path may be different when connecting to different libvirt hosts. remote host is ubuntu 20.04 running libvirtd (libvirt) 6.0.0 under systemd - Joe

3 5

libvirt Source RPMs for CentOS or RHEL?
by FuLong Wang 06 Apr '20

06 Apr '20

Hello Experts, Do we have libvirt source rpms (version above 5.9.0) for CentOS or RHEL? I only find source rpms for fedora in below public link. https://libvirt.org/sources/ -- FuLong Wang fulong.wang(a)cn.ibm.com IBM China Systems Lab, Beijing, China _______________________________________________

2 2

Question about libvirt filter features
by george_boutwell＠yahoo.com 04 Apr '20

04 Apr '20

1 0

can libvirt.so use jemalloc to manage mem ?
by thomas.kuang 02 Apr '20

02 Apr '20

HI, all My daemon exists a libvirt API call: virEventRegisterDefaultImpl(); once I called the virEventRegisterDefaultImpl() ,must be core ,the bt stack is: (gdb) bt #0 free (ptr=0x1) at include/jemalloc/internal/arena.h:652 #1 0x00007f57690a488a in virFree () from /lib64/libvirt.so.0 #2 0x00007f57690c3562 in virResetError () from /lib64/libvirt.so.0 #3 0x00007f57690c49ad in virEventRegisterDefaultImpl () from /lib64/libvirt.so.0 #4 0x00000000004029ad in main (argc=<optimized out>, argv=<optimized out>) at vnf_mgt/vnf_control.c:2920 (gdb) quit the following code copy from libvirt/src/util / int virEventRegisterDefaultImpl(void) { VIR_DEBUG("registering default event implementation"); virResetLastError(); if (virEventPollInit() < 0) { virDispatchError(NULL); return -1; } virEventRegisterImpl(virEventPollAddHandle, virEventPollUpdateHandle, virEventPollRemoveHandle, virEventPollAddTimeout, virEventPollUpdateTimeout, virEventPollRemoveTimeout); return 0; } void virResetLastError(void) { virErrorPtr err = virLastErrorObject(); if (err) virResetError(err); } static virErrorPtr virLastErrorObject(void) { virErrorPtr err; err = virThreadLocalGet(&virLastErr); if (!err) { if (VIR_ALLOC_QUIET(err) < 0) return NULL; if (virThreadLocalSet(&virLastErr, err) < 0) VIR_FREE(err); } return err; } void virResetError(virErrorPtr err) { if (err == NULL) return; VIR_FREE(err->message); VIR_FREE(err->str1); VIR_FREE(err->str2); VIR_FREE(err->str3); memset(err, 0, sizeof(virError)); } # define VIR_FREE(ptr) virFree(1 ? (void *) &(ptr) : (ptr)) void virFree(void *ptrptr) { int save_errno = errno; free(*(void**)ptrptr); *(void**)ptrptr = NULL; errno = save_errno; } when my daemon link with jemalloc must core，but if i use glibc to manage memory ,then it work fine, why ?

2 1