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[libvirt-users] virsh does no longer respond to commands
by Dominik Psenner 26 Oct '17

26 Oct '17

Hi, after a recent live backup done with a snapshot, blockcommit failed and a subsequent (manual) blockjob abort got stuck. Now we are unable to do basic operations on the virtual machine like if it was frozen and when issuing another command we see the following: $ virsh shutdown $domain error: Failed to shutdown domain $domain error: Timed out during operation: cannot acquire state change lock (held by remoteDispatchDomainBlockJobAbort) $ virsh blockcommit $domain --active --pivot error: Timed out during operation: cannot acquire state change lock (held by remoteDispatchDomainBlockJobAbort) $ virsh blockjob $domain --abort error: Timed out during operation: cannot acquire state change lock (held by remoteDispatchDomainBlockJobAbort) Houston, we've got a problem. We have roughly 16 hours to fix this. Any help is appreciated! -- Dominik Psenner

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[libvirt-users] Need to increase the rx and tx buffer size of my interface
by Ashish Kurian 26 Oct '17

26 Oct '17

Dear Users/Developers, I am using a KVM Ubuntu VM as a degrader to apply specific delays to incoming packets. As the delay for my packets can be higher than 7.5 seconds, there is not enough buffer on my interface to buffer all the packets. Therefore those overflowing packets are dropped in the machine and not forwarded. When I tried to use the command ethtool -G ens8 rx 512 to increase the buffer size, I get the following error. Cannot set device ring parameters: Operation not permitted I have kept the VM xml files as specified in the link : https://libvirt.org/formatdomain.html. The value that I kept in my xml file is as follows. <interface type='direct'> <mac address='52:54:00:72:f9:eb'/> <source dev='enp7s0f0' mode='vepa'/> <model type='virtio'/> <driver name='vhost' queues='5' rx_queue_size='512' tx_queue_size='512'> <host csum='off' gso='off' tso4='off' tso6='off' ecn='off' ufo='off' mrg_rxbuf='off'/> <guest csum='off' tso4='off' tso6='off' ecn='off' ufo='off'/> </driver> <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/> </interface> <interface type='direct'> <mac address='52:54:00:00:b5:99'/> <source dev='enp7s0f1' mode='vepa'/> <model type='virtio'/> <driver name='vhost' queues='5' rx_queue_size='512' tx_queue_size='512'> <host csum='off' gso='off' tso4='off' tso6='off' ecn='off' ufo='off' mrg_rxbuf='off'/> <guest csum='off' tso4='off' tso6='off' ecn='off' ufo='off'/> </driver> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> After I saved the xml and redefined the machine and started it up, I checked to see if the buffers are increased. I still see that the buffers are as follows. Ring parameters for ens9: Pre-set maximums: RX: 4096 RX Mini: 0 RX Jumbo: 0 TX: 4096 Current hardware settings: RX: *256* RX Mini: 0 RX Jumbo: 0 TX: *256* How can I increase the buffer on my KVM VM? Best Regards, Ashish Kurian

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[libvirt-users] virsh + remote VirtualBox
by Konstantin Suvorov 25 Oct '17

25 Oct '17

Hello, I have the following setup: 1. MacOS host with VirtualBox installed 2. Ubuntu 16.04 host with libvirt installed What I try to do: Manage VMs executed inside VirtualBox on host 1 with libvirt tools from host 2. I have vboxwebsrv up and running on my MacOS host. I can successfully manage VMs remotely (e.g. with phpvirtualbox). But libvirt (virsh in particular) doesn't work. Reading debug logs, manuals and numerous internet threads leads me to a conclusion, that libvirt does not support remote connection to VirtualBox directly and only via libvirtd daemon installed on the same remote host as VirtualBox. Is this correct? If my assumption is correct, why is that so? Why libvirt can't manage remote VirtualBox directly? Regards, Konstantin.

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[libvirt-users] domain CPU topology
by llilulu 24 Oct '17

24 Oct '17

Hi When I create a domain from xml file, the vcpu number point in <vcpu/>, I not point <cpu><topology> in xml file, when allocate more than 2 vpcus, some(windows) system can't use all vcpu. But I point <cpu><topology sockets='1' cores='num' threads='1'/></cpu>. num is <vcpu>'num'</vcpu>. then whindows can use all vcpus. I want to know when no ponit <cpu><topology> ,what default cpu topology. if point cpu topology, what rule guide cpu topology, I find VMware Workstation can point cpu num,and core of per cpu. all cores is cpu*core.

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[libvirt-users] libvirtd audit log
by llilulu 23 Oct '17

23 Oct '17

Hi I according to libvirt.org Audit log guide ,I install auditd in my system(ubuntu 16.04.2), but when I operate guest running in host, I can't not find guest audit log in /var/log/audit/audit.log, audit_level=1. when I change audit_level=2, I restart libvirtd, libvirtd start failed. Thanks

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[libvirt-users] terminating on signal 15 from pid 2146 (/usr/sbin/libvirtd)
by Matwey V. Kornilov 20 Oct '17

20 Oct '17

Hello, I use libvirt 3.3.0 and qemu 2.9.0 My domain XML spec is the following: <domain type='qemu'> <name>s390_generic</name> <uuid>82b4d16e-b636-447e-9fda-41d44616bce8</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='s390x' machine='s390-ccw-virtio-2.9'>hvm</type> <boot dev='hd'/> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-s390x</emulator> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source dev='/dev/lvm_pda/libvirt_s390'/> <target dev='vda' bus='virtio'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0000'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='sda' bus='scsi'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='scsi' index='0' model='virtio-scsi'> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0002'/> </controller> <interface type='bridge'> <mac address='52:54:00:e8:61:7e'/> <source bridge='br0'/> <model type='virtio'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0001'/> </interface> <console type='pty'> <target type='sclp' port='0'/> </console> <memballoon model='virtio'> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0003'/> </memballoon> <panic model='s390'/> </devices> </domain> The issue is that when I try to start it, it starts and shutdowns immediately: virsh # start s390_generic Domain s390_generic started virsh # In the domain log file I see the following: 2017-10-19 18:10:21.633+0000: starting up libvirt version: 3.3.0, qemu version: 2.9.0(openSUSE Leap 42.3), hostname: oak.local LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-s390x -name guest=s390_generic,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-7-s390_generic/master-key.aes -machine s390-ccw-virtio-2.9,accel=tcg,usb=off,dump-guest-core=off -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 82b4d16e-b636-447e-9fda-41d44616bce8 -display none -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-7-s390_generic/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -device virtio-scsi-ccw,id=scsi0,devno=fe.0.0002 -drive file=/dev/lvm_pda/libvirt_s390,format=raw,if=none,id=drive-virtio-disk0,cache=none,aio=native -device virtio-blk-ccw,scsi=off,devno=fe.0.0000,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive if=none,id=drive-scsi0-0-0-0,readonly=on -device scsi-cd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0 -netdev tap,fd=26,id=hostnet0 -device virtio-net-ccw,netdev=hostnet0,id=net0,mac=52:54:00:e8:61:7e,devno=fe.0.0001 -chardev pty,id=charconsole0 -device sclpconsole,chardev=charconsole0,id=console0 -device virtio-balloon-ccw,id=balloon0,devno=fe.0.0003 -msg timestamp=on 2017-10-19T18:10:21.701184Z qemu-system-s390x: -chardev pty,id=charconsole0: char device redirected to /dev/pts/5 (label charconsole0) 2017-10-19T18:10:21.721299Z qemu-system-s390x: terminating on signal 15 from pid 2146 (/usr/sbin/libvirtd) 2017-10-19 18:10:21.985+0000: shutting down, reason=shutdown What is the issue?

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[libvirt-users] virsh configure bridge network
by Charlotte 20 Oct '17

20 Oct '17

i creat a docker-machine-kvm,now,virsh edit mymachine,there show : i don't know how configure, let my machine can accessed by public network. please help me

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[libvirt-users] Fwd: terminating on signal 15 from pid 2146 (/usr/sbin/libvirtd)
by Matwey V. Kornilov 19 Oct '17

19 Oct '17

Hello, I use libvirt 3.3.0 and qemu 2.9.0 My domain XML spec is the following: <domain type='qemu'> <name>s390_generic</name> <uuid>82b4d16e-b636-447e-9fda-41d44616bce8</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='s390x' machine='s390-ccw-virtio-2.9'>hvm</type> <boot dev='hd'/> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-s390x</emulator> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source dev='/dev/lvm_pda/libvirt_s390'/> <target dev='vda' bus='virtio'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0000'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='sda' bus='scsi'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='scsi' index='0' model='virtio-scsi'> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0002'/> </controller> <interface type='bridge'> <mac address='52:54:00:e8:61:7e'/> <source bridge='br0'/> <model type='virtio'/> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0001'/> </interface> <console type='pty'> <target type='sclp' port='0'/> </console> <memballoon model='virtio'> <address type='ccw' cssid='0xfe' ssid='0x0' devno='0x0003'/> </memballoon> <panic model='s390'/> </devices> </domain> The issue is that when I try to start it, it starts and shutdowns immediately: virsh # start s390_generic Domain s390_generic started virsh # In the domain log file I see the following: 2017-10-19 18:10:21.633+0000: starting up libvirt version: 3.3.0, qemu version: 2.9.0(openSUSE Leap 42.3), hostname: oak.local LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-s390x -name guest=s390_generic,debug-threads=on -S -object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-7-s390_generic/master-key.aes -machine s390-ccw-virtio-2.9,accel=tcg,usb=off,dump-guest-core=off -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 82b4d16e-b636-447e-9fda-41d44616bce8 -display none -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-7-s390_generic/monitor.sock,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -device virtio-scsi-ccw,id=scsi0,devno=fe.0.0002 -drive file=/dev/lvm_pda/libvirt_s390,format=raw,if=none,id=drive-virtio-disk0,cache=none,aio=native -device virtio-blk-ccw,scsi=off,devno=fe.0.0000,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive if=none,id=drive-scsi0-0-0-0,readonly=on -device scsi-cd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0 -netdev tap,fd=26,id=hostnet0 -device virtio-net-ccw,netdev=hostnet0,id=net0,mac=52:54:00:e8:61:7e,devno=fe.0.0001 -chardev pty,id=charconsole0 -device sclpconsole,chardev=charconsole0,id=console0 -device virtio-balloon-ccw,id=balloon0,devno=fe.0.0003 -msg timestamp=on 2017-10-19T18:10:21.701184Z qemu-system-s390x: -chardev pty,id=charconsole0: char device redirected to /dev/pts/5 (label charconsole0) 2017-10-19T18:10:21.721299Z qemu-system-s390x: terminating on signal 15 from pid 2146 (/usr/sbin/libvirtd) 2017-10-19 18:10:21.985+0000: shutting down, reason=shutdown What is the issue? -- With best regards, Matwey V. Kornilov

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[libvirt-users] "virsh define" modify xml configuration file
by d tbsky 19 Oct '17

19 Oct '17

hi: I upgrade my system from rhel 7.3 to 7.4. so libvirt upgrade to 3.2. I found command "virsh define vm.xml" sometimes modify "vm.xml". I thought the command will read vm.xml, not write to it. is this kind of behavior by design? for example vm.xml with the line <cpu mode='custom' match='exact'> will be replaced with <cpu mode='custom' match='exact' check='partial'> Regards, tbskyd

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[libvirt-users] Can we disable write to /sys/fs/cgroup tree inside container ?
by mxs kolo 18 Oct '17

18 Oct '17

Hi all Each lxc container on node have mounted tmpfs for cgroups tree: [root-inside-lxc@tst1 ~]# mount | grep cgroups cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu) cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset) cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory) cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices) cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer) cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio) cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_prio,net_cls) cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event) cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd) cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb) cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids) It's by default, at least in my case. Problem is, that it's full cgroups tree - from hardware node and from all another containers on node. [root-inside-lxc@tst1 ~]# for i in `ls /sys/fs/cgroup/devices/machine.slice/machine-lxc*/devices.list`; do echo $i; cat $i; done /sys/fs/cgroup/devices/machine.slice/machine-lxc\x2d10297\x2dtst2.scope/devices.list c 1:3 rwm c 1:5 rwm c 1:7 rwm c 1:8 rwm c 1:9 rwm c 5:0 rwm c 5:2 rwm c 10:229 rwm b 253:6 rw c 136:* rwm /sys/fs/cgroup/devices/machine.slice/machine-lxc\x2d9951\x2dtst1.scope/devices.list c 1:3 rwm c 1:5 rwm c 1:7 rwm c 1:8 rwm c 1:9 rwm c 5:0 rwm c 5:2 rwm c 10:229 rwm b 253:7 rw c 136:* rwm Hardware node file, view inside tst1 container: [root-inside-lxc@tst1 ~]# cat /sys/fs/cgroup/devices/devices.list a *:* rwm What is best way to prevent viewing and editing of all cgroups structures except belonging to current lxc container (selinux, apparmor ) ? Why libvirt mount /sys/fs/cgroup/* inside container as rw ? We use kernel 3.10.0-693.2.2.el7.x86_64 and XFS and therefore our containers are privileged. Yes, we know that in such containers root can use SysRq at least for reboot hardware node. But problem with cgroups can be more hidden and cryptic. p.s. As show short test, root user can disable device zero on node [root-lxc@tst1 ~]# echo "c 1:5 rwm" > /sys/fs/cgroup/devices/devices.deny or all devices in another container [root-lxc@tst1 ~]# echo "a *:* rwm" > /sys/fs/cgroup/devices/machine.slice/machine-lxc\x2d10297\x2dtst2.scope/devices.deny b.r. Maxim Kozin

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