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[libvirt-users] migrate local storage to ceph | exchanging the storage system
by Björn Lässig 31 May '16

31 May '16

TLDR: Why is virsh migrate --persistent --live domain qemu+ssh://root@host/system --xml domain.ceph.xml not persistent and what could i do about it? Hi, after years of beeing pleased with local storage and migrating the complete storage from one host to another, it was time for ceph. After setting up a cluster and testing it, its time now for moving a lot of VMs on that type of storage, without a disturbance if possible. So I 'virsh dumpxml domain > domain.ceph.xml', edit the file, replace // ---- old ---- // <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none'/> <source file='domain.img'/> <backingStore/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> // ---- with new ---- // <disk type='network' device='disk'> <driver name='qemu' type='raw'/> <auth username='libvirt'> <secret type='ceph' uuid='53e4ba03-5ad0-4f1e-b69e-897afba272ff'/> </auth> <source protocol='rbd' name='libvirt/domain'> <host name='cephmon0' port='6789'/> <host name='cephmon1' port='6789'/> <host name='cephmon2' port='6789'/> </source> <backingStore/> <target dev='vda' bus='virtio'/> <boot order='1'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> Now i'm calling: root@host_a:~# virsh migrate --verbose --p2p --copy-storage-all --persistent --change-protection --abort-on-error --undefinesource --live domain qemu+ssh://root@host_b/system --xml domain.ceph.xml This takes its time to copy everything into ceph, but when its over, i never have to migrate Terabytes of Storage again. But its not over. The new domain definition on host_b is not persistent and after a shutdown, local storage is used again. What do i have todo, to make this change persistent, or is there a better way for doing this? (i am using libvirt 1.2.9) Thanks in advance Björn Lässig -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

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Re: [libvirt-users] Windows Server 2008 - KVM
by Thiago Oliveira 26 May '16

26 May '16

Hi there! I have installed a new VM with Win2k8 and the serial virtio driver works fine. I don´t know why the other VM the BSOD happen! About the performance, I had the impression that only one core is used.....PID 8301 is a linux VM with 4 VCPU and 2 GB of RAM... 2016-05-25 3:39 GMT-03:00 Dominique Ramaekers < dominique.ramaekers(a)cometal.be>: > > > *Van:* Thiago Oliveira [mailto:cpv.thiago@gmail.com] > *Verzonden:* dinsdag 24 mei 2016 20:14 > *Aan:* Dominique Ramaekers > *CC:* libvirt-users(a)redhat.com > *Onderwerp:* Re: [libvirt-users] Windows Server 2008 - KVM > > > > Hi there! > > > > I will do soon the disk config, but first I will do some labs. > > > > I´m trying to install the virtio driver to comunicate using qemu-agent but > when the driver is installed, the BSOD happens (win2k8 R2). > > I tried with virtio-drivers version 100, 110 and 117, both happens BSOD. > > > > Do you has a tip ? :) > > > > Can’t really help you there… I’ve installed the virtio drivers on numerus > Windows systems going from Windows-XP to Windows Server 2012R2. Never had > BSOD… > > I do remember having some trouble with the QXL graphics driver on one > specific version of virtio, but that’s all and that should be resolved… > > > > > > Thanks buddy! > > > > 2016-05-20 10:23 GMT-03:00 Dominique Ramaekers < > dominique.ramaekers(a)cometal.be>: > > > > > > *Van:* Thiago Oliveira [mailto:cpv.thiago@gmail.com] > *Verzonden:* vrijdag 20 mei 2016 15:07 > *Aan:* Dominique Ramaekers > *CC:* libvirt-users(a)redhat.com > *Onderwerp:* Re: [libvirt-users] Windows Server 2008 - KVM > > > > Hi there! > > > > Although the guest has 2GB memory, the windows guest was adjusted to > support this. > > > > I guess that the LVM is the best choice! I will save all images to other > disk and re-build the partition with LVM. Do you recomend to use ext4 or > zfs ? > > You’ll have to convert the qcow to raw, create a LVM-volume (don’t create > a file system on the volume), and dd the raw tot he LVM volume… > > > > - About the apparmor, I have my doubts, I will try to disable and see what > will happen! > > - About the tablet input device, I removed! Some forums say that > consuming idle cpu time. I know… Never could have verivied this… > > - About the guest agent, I have installed, but the first service can´t > start! > > The error says: *A timeout was reached (30000 milliseconds) while waiting > for the QEMU Guest Agent service to connect.* > > You’ll have to include the qemu-ga directives in the xml, that should do > the trick: > > <channel type='unix'> > > <source mode='bind'/> > > <target type='virtio' name='org.qemu.guest_agent.0'/> > > </channel> > > > > [image: Imagem inline 1] > > > > I´m using the virtio-win-0.1.117.iso, but I don´t know if this is updated. > > > > Thanks for your reply and your help! > > > > Thiago Oliveira > > > > > > > > > > > > > > > > 2016-05-20 8:31 GMT-03:00 Dominique Ramaekers < > dominique.ramaekers(a)cometal.be>: > > Please check virtual memory usage in the guest. 2Gb memory is very low. I > think your Windows guest is ‘swapping’ constantly. This combined with the > less performant qcow format… Reading and writing to qcow takes up host cpu… > > > > I don’t go under 3,5Gb for Windows Guests… > > > > Tip: Take the time to learn LVM. Changing from an image file to LVM really > pays off. I have a virtual host with RAID10 local storage. Changing to LVM > gave me more than 25% performance boost. > > > > For the rest, it seems ok. > > > > Less important: > > I have disabled apparmor security. This was done while using an older > version of virsh and I had trouble with apparmor. I don’t know if apparmor > has big performance influence. > > > > Wasn’t there a tablet input device? Did you delete this device? I think > it’s better to leave it. It has something to do with mouse usage in > virt-viewer or vnc… > > > > Install the guest agent on the guest and insert the needed XML-directives. > It gives you more possibilities managing your guest like a backup with > external snapshots. > > > > > > > > *Van:* Thiago Oliveira [mailto:cpv.thiago@gmail.com] > *Verzonden:* vrijdag 20 mei 2016 13:07 > *Aa**n:* Dominique Ramaekers > *CC:* libvirt-users(a)redhat.com > *Onderwerp:* Re: [libvirt-users] Windows Server 2008 - KVM > > > > Hi there! > > > > Sure......see below. > > > > # virsh version > > Compiled against library: libvirt 1.3.1 > > Using library: libvirt 1.3.1 > > Using API: QEMU 1.3.1 > > Running hypervisor: QEMU 2.5.0 > > > > # uname -a > > Linux 4.4.0-22-generic #40-Ubuntu 16 > > > > > > <domain type='kvm' id='8'> > > <name>W2k8</name> > > <uuid>a148a0b7-eefb-9a5b-8e83-8efaf19f9899</uuid> > > <description>None</description> > > <memory unit='KiB'>2097152</memory> > > <currentMemory unit='KiB'>2097152</currentMemory> > > <vcpu placement='static'>2</vcpu> > > <resource> > > <partition>/machine</partition> > > </resource> > > <os> > > <type arch='x86_64' machine='pc-i440fx-trusty'>hvm</type> > > <boot dev='hd'/> > > <boot dev='cdrom'/> > > <bootmenu enable='yes'/> > > </os> > > <features> > > <acpi/> > > <apic/> > > <pae/> > > </features> > > <cpu mode='host-passthrough'> > > <topology sockets='1' cores='2' threads='1'/> > > </cpu> > > <clock offset='localtime'/> > > <on_poweroff>destroy</on_poweroff> > > <on_reboot>restart</on_reboot> > > <on_crash>restart</on_crash> > > <devices> > > <emulator>/usr/bin/kvm-spice</emulator> > > <disk type='file' device='disk'> > > <driver name='qemu' type='qcow2' cache='none' io='native'/> > > <source file='/mnt/VM_SAS/w2k8.img'/> > > <backingStore/> > > <target dev='vda' bus='virtio'/> > > <alias name='virtio-disk0'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' > function='0x0'/> > > </disk> > > <disk type='file' device='disk'> > > <driver name='qemu' type='raw'/> > > <source file='/mnt/VM_SAS/second_HD.raw'/> > > <backingStore/> > > <target dev='vdb' bus='virtio'/> > > <alias name='virtio-disk1'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x06' > function='0x0'/> > > </disk> > > <disk type='file' device='cdrom'> > > <driver name='qemu' type='raw'/> > > <backingStore/> > > <target dev='hda' bus='ide' tray='open'/> > > <readonly/> > > <alias name='ide0-1-1'/> > > <address type='drive' controller='0' bus='1' target='0' unit='1'/> > > </disk> > > <controller type='pci' index='0' model='pci-root'> > > <alias name='pci.0'/> > > </controller> > > <controller type='ide' index='0'> > > <alias name='ide'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x1'/> > > </controller> > > <controller type='usb' index='0'> > > <alias name='usb'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x2'/> > > </controller> > > <interface type='network'> > > <mac address='52:54:00:c3:c9:f3'/> > > <source network='network_win' bridge='virbr0'/> > > <target dev='vnet1'/> > > <model type='virtio'/> > > <alias name='net0'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > > </interface> > > <serial type='pty'> > > <source path='/dev/pts/1'/> > > <target port='0'/> > > <alias name='serial0'/> > > </serial> > > <console type='pty' tty='/dev/pts/1'> > > <source path='/dev/pts/1'/> > > <target type='serial' port='0'/> > > <alias name='serial0'/> > > </console> > > <input type='mouse' bus='ps2'/> > > <input type='keyboard' bus='ps2'/> > > <graphics type='vnc' port='5901' autoport='yes' listen='0.0.0.0'> > > <listen type='address' address='0.0.0.0'/> > > </graphics> > > <video> > > <model type='cirrus' vram='16384' heads='1'/> > > <alias name='video0'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x02' > function='0x0'/> > > </video> > > <memballoon model='virtio'> > > <alias name='balloon0'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x05' > function='0x0'/> > > </memballoon> > > </devices> > > <seclabel type='dynamic' model='apparmor' relabel='yes'> > > <label>libvirt-a148a0b7-eefb-9a5b-8e83-8efaf19f9899</label> > > <imagelabel>libvirt-a148a0b7-eefb-9a5b-8e83-8efaf19f9899</imagelabel> > > </seclabel> > > </domain> > > > > > > > > > > > > > > 2016-05-20 3:57 GMT-03:00 Dominique Ramaekers < > dominique.ramaekers(a)cometal.be>: > > > > > > *Van:* libvirt-users-bounces(a)redhat.com [mailto: > libvirt-users-bounces(a)redhat.com] *Namens *Thiago Oliveira > *Verzonden:* vrijdag 20 mei 2016 4:09 > *Aan:* libvirt-users(a)redhat.com > *Onderwerp:* [libvirt-users] Windows Server 2008 - KVM > > > > Hi folks! > > > > When I start the Windows Server 2008 guest, the host cpu grown up > the utilization and the host load average too. Are there some tips to > use Windows Server with libvirt? > > > > Thanks, > > Thiago > > > > > > Could you send the XML and the result of ‘virsh version’? > > > > > > >

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Re: [libvirt-users] Windows Server 2008 - KVM
by Thiago Oliveira 25 May '16

25 May '16

Hi there! Although the guest has 2GB memory, the windows guest was adjusted to support this. I guess that the LVM is the best choice! I will save all images to other disk and re-build the partition with LVM. Do you recomend to use ext4 or zfs ? - About the apparmor, I have my doubts, I will try to disable and see what will happen! - About the tablet input device, I removed! Some forums say that consuming idle cpu time. - About the guest agent, I have installed, but the first service can´t start! The error says: *A timeout was reached (30000 milliseconds) while waiting for the QEMU Guest Agent service to connect.* [image: Imagem inline 1] I´m using the virtio-win-0.1.117.iso, but I don´t know if this is updated. Thanks for your reply and your help! Thiago Oliveira 2016-05-20 8:31 GMT-03:00 Dominique Ramaekers < dominique.ramaekers(a)cometal.be>: > Please check virtual memory usage in the guest. 2Gb memory is very low. I > think your Windows guest is ‘swapping’ constantly. This combined with the > less performant qcow format… Reading and writing to qcow takes up host cpu… > > > > I don’t go under 3,5Gb for Windows Guests… > > > > Tip: Take the time to learn LVM. Changing from an image file to LVM really > pays off. I have a virtual host with RAID10 local storage. Changing to LVM > gave me more than 25% performance boost. > > > > For the rest, it seems ok. > > > > Less important: > > I have disabled apparmor security. This was done while using an older > version of virsh and I had trouble with apparmor. I don’t know if apparmor > has big performance influence. > > > > Wasn’t there a tablet input device? Did you delete this device? I think > it’s better to leave it. It has something to do with mouse usage in > virt-viewer or vnc… > > > > Install the guest agent on the guest and insert the needed XML-directives. > It gives you more possibilities managing your guest like a backup with > external snapshots. > > > > > > > > *Van:* Thiago Oliveira [mailto:cpv.thiago@gmail.com] > *Verzonden:* vrijdag 20 mei 2016 13:07 > *Aa**n:* Dominique Ramaekers > *CC:* libvirt-users(a)redhat.com > *Onderwerp:* Re: [libvirt-users] Windows Server 2008 - KVM > > > > Hi there! > > > > Sure......see below. > > > > # virsh version > > Compiled against library: libvirt 1.3.1 > > Using library: libvirt 1.3.1 > > Using API: QEMU 1.3.1 > > Running hypervisor: QEMU 2.5.0 > > > > # uname -a > > Linux 4.4.0-22-generic #40-Ubuntu 16 > > > > > > <domain type='kvm' id='8'> > > <name>W2k8</name> > > <uuid>a148a0b7-eefb-9a5b-8e83-8efaf19f9899</uuid> > > <description>None</description> > > <memory unit='KiB'>2097152</memory> > > <currentMemory unit='KiB'>2097152</currentMemory> > > <vcpu placement='static'>2</vcpu> > > <resource> > > <partition>/machine</partition> > > </resource> > > <os> > > <type arch='x86_64' machine='pc-i440fx-trusty'>hvm</type> > > <boot dev='hd'/> > > <boot dev='cdrom'/> > > <bootmenu enable='yes'/> > > </os> > > <features> > > <acpi/> > > <apic/> > > <pae/> > > </features> > > <cpu mode='host-passthrough'> > > <topology sockets='1' cores='2' threads='1'/> > > </cpu> > > <clock offset='localtime'/> > > <on_poweroff>destroy</on_poweroff> > > <on_reboot>restart</on_reboot> > > <on_crash>restart</on_crash> > > <devices> > > <emulator>/usr/bin/kvm-spice</emulator> > > <disk type='file' device='disk'> > > <driver name='qemu' type='qcow2' cache='none' io='native'/> > > <source file='/mnt/VM_SAS/w2k8.img'/> > > <backingStore/> > > <target dev='vda' bus='virtio'/> > > <alias name='virtio-disk0'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' > function='0x0'/> > > </disk> > > <disk type='file' device='disk'> > > <driver name='qemu' type='raw'/> > > <source file='/mnt/VM_SAS/second_HD.raw'/> > > <backingStore/> > > <target dev='vdb' bus='virtio'/> > > <alias name='virtio-disk1'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x06' > function='0x0'/> > > </disk> > > <disk type='file' device='cdrom'> > > <driver name='qemu' type='raw'/> > > <backingStore/> > > <target dev='hda' bus='ide' tray='open'/> > > <readonly/> > > <alias name='ide0-1-1'/> > > <address type='drive' controller='0' bus='1' target='0' unit='1'/> > > </disk> > > <controller type='pci' index='0' model='pci-root'> > > <alias name='pci.0'/> > > </controller> > > <controller type='ide' index='0'> > > <alias name='ide'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x1'/> > > </controller> > > <controller type='usb' index='0'> > > <alias name='usb'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' > function='0x2'/> > > </controller> > > <interface type='network'> > > <mac address='52:54:00:c3:c9:f3'/> > > <source network='network_win' bridge='virbr0'/> > > <target dev='vnet1'/> > > <model type='virtio'/> > > <alias name='net0'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > > </interface> > > <serial type='pty'> > > <source path='/dev/pts/1'/> > > <target port='0'/> > > <alias name='serial0'/> > > </serial> > > <console type='pty' tty='/dev/pts/1'> > > <source path='/dev/pts/1'/> > > <target type='serial' port='0'/> > > <alias name='serial0'/> > > </console> > > <input type='mouse' bus='ps2'/> > > <input type='keyboard' bus='ps2'/> > > <graphics type='vnc' port='5901' autoport='yes' listen='0.0.0.0'> > > <listen type='address' address='0.0.0.0'/> > > </graphics> > > <video> > > <model type='cirrus' vram='16384' heads='1'/> > > <alias name='video0'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x02' > function='0x0'/> > > </video> > > <memballoon model='virtio'> > > <alias name='balloon0'/> > > <address type='pci' domain='0x0000' bus='0x00' slot='0x05' > function='0x0'/> > > </memballoon> > > </devices> > > <seclabel type='dynamic' model='apparmor' relabel='yes'> > > <label>libvirt-a148a0b7-eefb-9a5b-8e83-8efaf19f9899</label> > > <imagelabel>libvirt-a148a0b7-eefb-9a5b-8e83-8efaf19f9899</imagelabel> > > </seclabel> > > </domain> > > > > > > > > > > > > > > 2016-05-20 3:57 GMT-03:00 Dominique Ramaekers < > dominique.ramaekers(a)cometal.be>: > > > > > > *Van:* libvirt-users-bounces(a)redhat.com [mailto: > libvirt-users-bounces(a)redhat.com] *Namens *Thiago Oliveira > *Verzonden:* vrijdag 20 mei 2016 4:09 > *Aan:* libvirt-users(a)redhat.com > *Onderwerp:* [libvirt-users] Windows Server 2008 - KVM > > > > Hi folks! > > > > When I start the Windows Server 2008 guest, the host cpu grown up > the utilization and the host load average too. Are there some tips to > use Windows Server with libvirt? > > > > Thanks, > > Thiago > > > > > > Could you send the XML and the result of ‘virsh version’? > > >

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[libvirt-users] Issue with fsfreeze with qemu agent.
by Dominique Ramaekers 25 May '16

25 May '16

Hi, I use external snapshots to backup my guests. I use the 'quiesce' option to flush and frees the guest file system with the qemu guest agent. With the exeption of one guest, this procedure works fine. On the 'unwilling' guest, I get this error message: "ERROR 2016-05-25 00:51:19 | T25-bakVMSCmsrvVH2 | fout: internal error: unable to execute QEMU agent command 'guest-fsfreeze-freeze': failed to freeze /: Device or resource busy" I don't think this is not some sort of time-out error, because activation of the fsfreeze and the error message happen immediately after each other: $ grep qemu-ga syslog.1 May 25 00:51:19 CmsrvMTA qemu-ga: info: guest-fsfreeze called This is the only entry of the qemu guest agent in syslog. The difference of this guest in compresence with other, is that this guest runs postfix + amavis + spammassasin + clamav Any help would be appreciated. More info: $ sudo virsh version Compiled against library: libvirt 1.3.1 Using library: libvirt 1.3.1 Gebruikte API: QEMU 1.3.1 Draaiende hypervisor: QEMU 2.5.0 $ virsh qemu-agent-command CmsrvMTA '{"execute": "guest-info"}' {"return":{"version":"2.5.0", ... ,{"enabled":true,"name":"guest-fstrim","success-response":true},{"enabled":true,"name":"guest-fsfreeze-thaw","success-response":true},{"enabled":true,"name":"guest-fsfreeze-status","success-response":true},{"enabled":true,"name":"guest-fsfreeze-freeze-list","success-response":true},{"enabled":true,"name":"guest-fsfreeze-freeze","success-response":true}, ... } For making an external snapshot, I use this command: $ virsh snapshot-create-as --domain CmsrvMTA sn1 --disk-only --atomic --quiesce --no-metadata --diskspec vda,file=/srv/poolVMS/CmsrvMTA.sn1 Greetings, Dominique.

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[libvirt-users] Windows, qemu.agent is it possible to shut down services in running windows server?
by Marko Weber | 8000 23 May '16

23 May '16

Hi List, i installed qemu-agent on a windows server and it is working as expected. I can send via virsh commands. I already performed successful an online backup of an windows server. Now my question is, is it possible to execute commands on the windows server via qemu-agent? I want to shutdown the MSSQL Service before doing backups. Is that possible? i dont find any helpful pages in net. Any hints & tipps are welcome Marko -- zbfmail - Mittendrin statt nur Datei! OpenDKIM, SPF, DSPAM, Greylisting, POSTSCREEN, AMAVIS, Mailgateways Mailfiltering, SMTP Service, Spam Abwehr, MX-Backup, Mailserver Backup Redundante Mailgateways, HA Mailserver, Secure Mailserver

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[libvirt-users] libtool: error: '/usr/lib64/libtasn1.la' is not a valid libtool archive
by Ambika Prasad Tripathy (ambtripa) 23 May '16

23 May '16

Hi, Can you please point me what is going wrong during make of libvirt. I found libtasn1.la is present under my sysroot path, still why make is searching it under /usr/lib64/? <make logs> CCLD libvirt_driver.la /router/bin/grep: /usr/lib64/libtasn1.la: No such file or directory sed: can't read /usr/lib64/libtasn1.la: No such file or directory libtool: error: '/usr/lib64/libtasn1.la' is not a valid libtool archive make-3.79.1-p7[3]: *** [libvirt_driver.la] Error 1 make-3.79.1-p7[3]: Leaving directory `/nobackup/ambtripa/sdk_temp/libvirt-1.3.4/src' make-3.79.1-p7[2]: *** [all] Error 2 make-3.79.1-p7[2]: Leaving directory `/nobackup/ambtripa/sdk_temp/libvirt-1.3.4/src' make-3.79.1-p7[1]: *** [all-recursive] Error 1 make-3.79.1-p7[1]: Leaving directory `/nobackup/ambtripa/sdk_temp/libvirt-1.3.4' make-3.79.1-p7: *** [all] Error 2 bash-3.2$ </make logs> - Br, Ambika Prasad Tripathy

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[libvirt-users] Need information
by Gk Gk 23 May '16

23 May '16

Hi, Referring to the link http://wiki.libvirt.org/page/VirtualNetworking, the scenario described for the routed mode, explains that "Host has public IP and virtual machines have static public IPs. But one can't use bridged networking, since provider accept only packets from the MAC address of the host" Can someone explain to me why doesn't the switch accept the packets from the guest vms' mac addresses also since they have public IPs in the bridged mode ? Thanks Kumar

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[libvirt-users] how view all macvlan inrterfaces from LXC on hardware node
by mxs kolo 21 May '16

21 May '16

Hi all We run LXC contrainers in macvlan bridge mode, i.e.; <interface type='direct'> <mac address='02:00:00:da:e1:b9'/> <source dev='eno1.502' mode='bridge'/> </interface> In process list: 5339 ? Sl 0:03 /usr/libexec/libvirt_lxc --name t2.infra --console 21 --security=none --handshake 24 --veth macvlan6 28645 ? Sl 0:00 /usr/libexec/libvirt_lxc --name t1.infra --console 21 --security=none --handshake 27 --veth macvlan42 How get list of all vlan by "ip" or any other utility ? "ip link show" not report this macvlans, and "ip netns list" not show empty output b.r. Maxim Kozin

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Re: [libvirt-users] Windows Server 2008 - KVM
by Thiago Oliveira 20 May '16

20 May '16

Hi there! Sure......see below. # virsh version Compiled against library: libvirt 1.3.1 Using library: libvirt 1.3.1 Using API: QEMU 1.3.1 Running hypervisor: QEMU 2.5.0 # uname -a Linux 4.4.0-22-generic #40-Ubuntu 16 <domain type='kvm' id='8'> <name>W2k8</name> <uuid>a148a0b7-eefb-9a5b-8e83-8efaf19f9899</uuid> <description>None</description> <memory unit='KiB'>2097152</memory> <currentMemory unit='KiB'>2097152</currentMemory> <vcpu placement='static'>2</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64' machine='pc-i440fx-trusty'>hvm</type> <boot dev='hd'/> <boot dev='cdrom'/> <bootmenu enable='yes'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu mode='host-passthrough'> <topology sockets='1' cores='2' threads='1'/> </cpu> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/bin/kvm-spice</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2' cache='none' io='native'/> <source file='/mnt/VM_SAS/w2k8.img'/> <backingStore/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/mnt/VM_SAS/second_HD.raw'/> <backingStore/> <target dev='vdb' bus='virtio'/> <alias name='virtio-disk1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <backingStore/> <target dev='hda' bus='ide' tray='open'/> <readonly/> <alias name='ide0-1-1'/> <address type='drive' controller='0' bus='1' target='0' unit='1'/> </disk> <controller type='pci' index='0' model='pci-root'> <alias name='pci.0'/> </controller> <controller type='ide' index='0'> <alias name='ide'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='usb' index='0'> <alias name='usb'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <interface type='network'> <mac address='52:54:00:c3:c9:f3'/> <source network='network_win' bridge='virbr0'/> <target dev='vnet1'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='vnc' port='5901' autoport='yes' listen='0.0.0.0'> <listen type='address' address='0.0.0.0'/> </graphics> <video> <model type='cirrus' vram='16384' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> <seclabel type='dynamic' model='apparmor' relabel='yes'> <label>libvirt-a148a0b7-eefb-9a5b-8e83-8efaf19f9899</label> <imagelabel>libvirt-a148a0b7-eefb-9a5b-8e83-8efaf19f9899</imagelabel> </seclabel> </domain> 2016-05-20 3:57 GMT-03:00 Dominique Ramaekers < dominique.ramaekers(a)cometal.be>: > > > > > *Van:* libvirt-users-bounces(a)redhat.com [mailto: > libvirt-users-bounces(a)redhat.com] *Namens *Thiago Oliveira > *Verzonden:* vrijdag 20 mei 2016 4:09 > *Aan:* libvirt-users(a)redhat.com > *Onderwerp:* [libvirt-users] Windows Server 2008 - KVM > > > > Hi folks! > > > > When I start the Windows Server 2008 guest, the host cpu grown up > the utilization and the host load average too. Are there some tips to > use Windows Server with libvirt? > > > > Thanks, > > Thiago > > > > > > Could you send the XML and the result of ‘virsh version’? >

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[libvirt-users] Windows Server 2008 - KVM
by Thiago Oliveira 20 May '16

20 May '16

Hi folks! When I start the Windows Server 2008 guest, the host cpu grown up the utilization and the host load average too. Are there some tips to use Windows Server with libvirt? Thanks, Thiago

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[libvirt-users] libvirt equivalent for VMWare for SCSI mode = independent-persistent?
by Juha Anttila 20 May '16

20 May '16

Hi, I'm attempting to add virtual SCSI disks to my KVM guests the same way as I did with VMWare, but I'm having issues. Without knowing any better, I'm assuming it has something to do with me attaching the disk incorrectly, and when I'm looking at the VMWare config one thing I noticed was the SCSI mode "independent-persistent" which I cannot find in libvirt documentation by quick look. Would anyone know how to achieve this? In the VMWare VMX file I have: scsi1:4.present = "TRUE" scsi1:4.fileName = "SCSI1.vmdk" scsi1:4.mode = "independent-persistent" scsi1:4.deviceType = "scsi-hardDisk" and I attempted the below configuration, but when I tried to use the disk as a IO Fencing disk for veritas cluster file system, it failed saying that the device is not SCSI-3 compliant. With VMWare same works fine. SCSI Controller: <controller type='scsi' index='0' model='virtio-scsi'> <alias name='scsi0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0e' function='0x0'/> </controller> Disk: <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source file='/home/VM/VMImages/IOFencing1.img'/> <target dev='sda' bus='scsi'/> <shareable/> <alias name='scsi0-0-0-0'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk>

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[libvirt-users] libvirt on Raspberry Pi, block by parameter "-S"
by Xu Ding 20 May '16

20 May '16

Hi I have used libvirt on Raspberry Pi Debian. I can start the vm, but it just starts and doesn't continue. I find the qemu-system-arm command generated by virsh has a parameter "-S", when I copy the command, remove the parameter, run it in the console, the vm can run normally. But I don't know how to remove the parameter in the xml file, or in virsh. Regards Thank you Xu Here's the qemu-system-arm command, generated by libvirt: LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/local/bin/qemu-system-arm -name test -S -machine vexpress-a15,accel=kvm,usb=off -cpu host -m 500 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid cab134ea-eed8-42e7-88cb-403ee2801e22 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/test.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot menu=off,strict=on -kernel /home/pi/src/vexpress-zImage -append "root=/dev/vda rw console=ttyAMA0" -dtb /home/pi/src/vexpress-v2p-ca15-tc1.dtb -usb -drive file=/home/pi/src/test.qcow2,if=none,id=drive-virtio-disk0,format=qcow2 -device virtio-blk-device,scsi=off,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=/home/pi/src/opensuse.img,if=none,media=cdrom,id=drive-virtio-disk1,readonly=on,format=raw -device virtio-blk-device,scsi=off,drive=drive-virtio-disk1,id=virtio-disk1 -net nic,macaddr=00:16:3e:5d:aa:a8,vlan=0,model=lan9118,name=net0 -net tap,fd=23,vlan=0,name=hostnet0 -serial file:/var/log/libvirt/qemu/console.log -serial pty -msg timestamp=on Here's my xml file: <domain type='kvm'> <name>test</name> <uuid>cab134ea-eed8-42e7-88cb-403ee2801e22</uuid> <memory unit='KiB'>512000</memory> <currentMemory unit='KiB'>512000</currentMemory> <vcpu placement='static'>1</vcpu> <cputune> <vcpupin vcpu='0' cpuset='3'/> </cputune> <os> <type arch='armv7l' machine='vexpress-a15'>hvm</type> <kernel>/home/pi/src/vexpress-zImage</kernel> <cmdline>"root=/dev/vda rw console=ttyAMA0"</cmdline> <dtb>/home/pi/src/vexpress-v2p-ca15-tc1.dtb</dtb> <boot dev='hd'/> <bootmenu enable='no'/> </os> <features> <acpi/> <apic/> <pae/> </features> <cpu mode='host-model'> <model fallback='allow'/> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/local/bin/qemu-system-arm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='qcow2'/> <source file='/home/pi/src/test.qcow2'/> <target dev='hda' bus='virtio'/> <address type='virtio-mmio'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/home/pi/src/opensuse.img'/> <target dev='hdb' bus='virtio'/> <readonly/> <address type='virtio-mmio'/> </disk> <interface type='bridge'> <mac address='00:16:3e:5d:aa:a8'/> <source bridge='br0'/> <model type='lan9118'/> </interface> <serial type='file'> <source path='/var/log/libvirt/qemu/console.log'/> <target port='0'/> </serial> <serial type='pty'> <target port='1'/> </serial> <console type='file'> <source path='/var/log/libvirt/qemu/console.log'/> <target type='serial' port='0'/> </console> </devices> </domain>

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[libvirt-users] Cannot get Sound-Output via pulseaudio
by arne 18 May '16

18 May '16

Hi, i am currently trying to get my qemu-bashscripts to run via libvirt. It took some time but my first VM seems to work okay. My main problem is Sound. I run a pulse audio service and when starting the vm via Commandline it sends sound to the pulseaudioserver just fine However when i start the vm via libvirt i cannot get any sound output, pavucontrol shows no connected application. When looking at the /var/log/libvirt/<vmname>.log i can see that the vm is started with ‚QEMU_AUDIO_DRV=none‘ . How can i set this to QEMU_AUDIO_DRV=pa ? Hope someone might help me. Cheers

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[libvirt-users] Cannot get Sound-Output via pulseaudio
by arne 18 May '16

18 May '16

Hi, i am currently trying to get my qemu-bashscripts to run via libvirt. It took some time but my first VM seems to work okay. My main problem is Sound. I run a pulse audio service and when starting the vm via Commandline it sends sound to the pulseaudioserver just fine However when i start the vm via libvirt i cannot get any sound output, pavucontrol shows no connected application. When looking at the /var/log/libvirt/<vmname>.log i can see that the vm is started with ‚QEMU_AUDIO_DRV=none‘ . How can i set this to QEMU_AUDIO_DRV=pa ? Hope someone might help me. Cheers

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[libvirt-users] Disable certain VMs from being launched
by Sureshkumar Kaliannan 18 May '16

18 May '16

The VMs are launched using a pre-defined domain.xml + raw disk. All VMs (whitelisted + backlisted) ones are launched the same way (virsh define followed by virsh start) I want to be able to disable launching of certain VMs(blacklisted ones) unless explicitly allowed. What is the best way to accomplish this? I am exploring the selinux path for this requirement. The current implementation(understandably) isolates each guest into their own MCS categories but by default the resources are always relabeled. Unless, I change the libvirtd code, the auto relabelling can't be disabled(?) Still trying to understand the various virt selinux policies, and XML seclabel options to accomplish this. Are there better alternatives? thanks Suresh

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[libvirt-users] How to set virtual pci slot address > 3 on creating VM?
by Eddie Yen 17 May '16

17 May '16

Hello everyone, this is my first time post this question at this mailing list. And I'm not so well in English, so apologize first if I got any sentence wrong or the question doesn't mean so well. OK, I'm now trying the KVMGT on QEMU and it works well even I didn't set any virtual display. For now KVMGT only can launch with QEMU command line, I know that libvirt didn't support it yet. So I have to set command line for KVMGT features in one of the shell script (i.e /usr/bin/kvm). The problem is, KVMGT set itself as VGA device, that means the default virtual PCI address gave from QEMU is 0000:00:02.0. If I set KVMGT feature command on shell script file (i.e -vga vgt), I will get this error while creating the VM from virt-manager. qemu-system-x86_64: -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2: PCI: slot 2 function 0 not available for virtio-balloon-pci, in use by vgt-vga qemu-system-x86_64: -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x2: Device 'virtio-balloon-pci' could not be initialized So I have to create the VM without KVMGT first, then manually edit virtual PCI address to avoid 0000:00:02.0 But I want to make it automatically for each creation in some reasons. How can I do? And appreciate first for every reply. Many thanks, Eddie.

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[libvirt-users] Nested Virtualization not working
by Daniel Sanabria 16 May '16

16 May '16

Hi, I wonder if someone can provide pointers on what might be wrong with my setup. I'm running a kvm host Fedora23 with rawhide kernel on top of a skylake cpu - Intel(R) Core(TM) i5-6260U CPU @ 1.80GHz (family: 0x6, model: 0x4e, stepping: 0x3) As part of an experiment, I have enabled Nested virt support on the host and created a fedora23 guest with virt-manager using host-passthrough as the cpu model. The guest comes up fine and was updated without issues. Now if I install VirtualBox 5.0 and try to start a vm (fedora 23 again) I end up with a protection fault in the console (below) and the vm does not boot. A similar fault appeared when trying with a centos7.2 guest and a ubuntu vm but in that case just after the fault the guest reboots itself. What could be the problem here? Any help is very appreciated. Thanks, Daniel [ 77.538312] general protection fault: 0000 [#1] SMP [ 77.539235] Modules linked in: ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) ebtable_broute bridge stp llc ebtable_filter ebtable_nat ebtables ip6table_mangle ip6table_security ip6table_raw ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_filter ip6_tables iptable_mangle iptable_security iptable_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack snd_hda_codec_generic vboxdrv(OE) iosf_mbi kvm_intel snd_hda_intel kvm snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device joydev snd_pcm ppdev irqbypass crct10dif_pclmul crc32_pclmul snd_timer snd acpi_cpufreq virtio_balloon parport_pc tpm_tis soundcore tpm i2c_piix4 parport nfsd auth_rpcgss nfs_acl lockd grace sunrpc xfs libcrc32c virtio_console virtio_net virtio_blk qxl drm_kms_helper ttm drm crc32c_intel serio_raw virtio_pci virtio_ring virtio ata_generic pata_acpi [ 77.548011] CPU: 0 PID: 1991 Comm: EMT Tainted: G OE 4.4.9-300.fc23.x86_64 #1 [ 77.548719] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.8.2-20150714_191134- 04/01/2014 [ 77.549715] task: ffff8800b4e8dd00 ti: ffff8800b4fdc000 task.ti: ffff8800b4fdc000 [ 77.550320] RIP: 0010:[<ffffffffa05ee506>] [<ffffffffa05ee506>] 0xffffffffa05ee506 [ 77.551053] RSP: 0018:ffff8800b4fdfd70 EFLAGS: 00050206 [ 77.551548] RAX: 00000000003406f0 RBX: 00000000ffffffdb RCX: 000000000000009b [ 77.552193] RDX: 0000000000000000 RSI: ffff8800b4fdfd00 RDI: ffff8800b4fdfcc8 [ 77.552952] RBP: ffff8800b4fdfd90 R08: 0000000000000004 R09: 00000000003406f0 [ 77.553498] R10: 0000000049656e69 R11: 000000000f8bfbff R12: 0000000000000020 [ 77.554042] R13: 0000000000000000 R14: ffffc90001c0207c R15: ffffffffa04c5220 [ 77.554594] FS: 00007fc70f128700(0000) GS:ffff88013fc00000(0000) knlGS:0000000000000000 [ 77.555208] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.555650] CR2: 00007fc70eecb000 CR3: 00000000ba695000 CR4: 00000000003406f0 [ 77.556195] Stack: [ 77.556360] 0000000000000000 ffffffff00000000 0000000000000000 0000000000000002 [ 77.556985] ffff8800b4fdfdb0 ffffffffa0603db1 ffffc90001c02010 ffff88013822f6d0 [ 77.557597] ffff8800b4fdfe30 ffffffffa048b2f6 ffff8800b4ebc5c0 ffff8800b4fdc000 [ 77.558210] Call Trace: [ 77.558421] [<ffffffffa048b2f6>] ? supdrvIOCtl+0x2d36/0x3250 [vboxdrv] [ 77.558964] [<ffffffff813c2e45>] ? copy_user_enhanced_fast_string+0x5/0x10 [ 77.559526] [<ffffffffa04845b0>] ? VBoxDrvLinuxIOCtl_5_0_20+0x150/0x250 [vboxdrv] [ 77.560133] [<ffffffff81241648>] ? do_vfs_ioctl+0x298/0x480 [ 77.560593] [<ffffffff81338393>] ? security_file_ioctl+0x43/0x60 [ 77.561081] [<ffffffff812418a9>] ? SyS_ioctl+0x79/0x90 [ 77.561503] [<ffffffff817a0f2e>] ? entry_SYSCALL_64_fastpath+0x12/0x71 [ 77.562033] Code: 88 e4 fc ff ff b9 3a 00 00 00 0f 32 48 c1 e2 20 89 c0 48 09 d0 48 89 05 f9 db 0e 00 0f 20 e0 b9 9b 00 00 00 48 89 05 d2 db 0e 00 <0f> 32 48 c1 e2 20 89 c0 b9 80 00 00 c0 48 09 d0 48 89 05 cb db [ 77.564260] RIP [<ffffffffa05ee506>] 0xffffffffa05ee506 [ 77.564701] RSP <ffff8800b4fdfd70> [ 77.565103] ---[ end trace 9cf480524482767b ]---

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[libvirt-users] Guest still receive packet with vlan tag (SR-IOV transparent VLAN)
by Long Hoang 16 May '16

16 May '16

Hello everyone, I'm having problem with SR-IOV transparent VLAN. My host is Fedora 22 and my guest is: pfSense 2.3. The NIC is Intel 82576. I'm using pfSense Packet Capture to check the packet and find that inbound packet still have the vlan tag. The outbound packet seem fine because the router can receive DHCP discover packet from the guest and then send DHCP offer and ARP request packet to the guest (which still have the vlan tag so the guest does not response). Loading Ubuntu LiveCD in the same VM does not have this issue so I do not know what is the cause? Any idea to diagnose? Another problem I have is libvirt does not correctly restore the vf mac address to all zero and then some occasion, there will be duplicate mac address in different vfs which will trigger spoof checking. I found the related mail here https://www.redhat.com/archives/libvir-list/2015-December/msg00478.html which point to this bug https://bugzilla.redhat.com/show_bug.cgi?id=1302166 . The bug only mention to mellanox cards. Do anyone have the same problem (with igb/igbvf driver) ? Or is it fixed in upstream?

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[libvirt-users] More recent libvirt builds for CentOS 7
by Le Nucksi 16 May '16

16 May '16

Hello list, is there a way to get more recent libvirt builds for CentOS 7 that include support for the xl (modern Xen) toolstack? I tried to build libvirt from the SRPM, which succeeded, however, without the mentioned Xen parts. I have also found two repos from people who provide upstream libvirt builds for CentOS 7, again, without the Xen parts. - https://copr.fedorainfracloud.org/coprs/jmliger/virt7-upstream/ and - https://build.opensuse.org/package/show/home:aevseev/libvirt Within the CentOS virtualization SIG builds for Xen there is a 1.3.x build of libvirt that includes support for the modern Xen toolstack. Would it be possible to inline this into the upstream to enable building it with Xen features on CentOS 7 such that the aforementioned people's RPMs would contain it? I appreciate any enlightment on the topic. Cheers, Le

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[libvirt-users] More recent libvirt builds for CentOS 7
by Le Nucksi 15 May '16

15 May '16

Hello list, is there a way to get more recent libvirt builds for CentOS 7 that include support for the xl (modern Xen) toolstack? I tried to build libvirt from the SRPM, which succeeded, however, without the mentioned Xen parts. I have also found two repos from people who provide upstream libvirt builds for CentOS 7, again, without the Xen parts. - https://copr.fedorainfracloud.org/coprs/jmliger/virt7-upstream/ and - https://build.opensuse.org/package/show/home:aevseev/libvirt Within the CentOS virtualization SIG builds for Xen there is a 1.3.x build of libvirt that includes support for the modern Xen toolstack. Would it be possible to inline this into the upstream to enable building it with Xen features on CentOS 7 such that the aforementioned people's RPMs would contain it? I appreciate any enlightment on the topic. Cheers, Le

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[libvirt-users] Connectivity between Guest and Host
by christopher＠padarom.io 15 May '16

15 May '16

Hello everyone, I have followed this guide to enable my Windows 10 guest to reach my Arch Linux host: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/ht… My VM now has 2 NICs: - macvtap (VEPA) - virtual network 'isolated' I have statically assigned the IP 192.168.254.2 to my guest. The host's IP is 192.168.254.1. The interface it is using on the host is *virbr1*. I am able to ping the host from the guest and vice versa, so the network connectivity seems to be generally working. To control my VM I'd like to use Synergy which I have already set up and tested successfully once with the VM as the Server, but never since. When I try to connect the Synergy client from the host to a server running on the guest, I get the error *"failed to connect to server: address not found for: 192.168.254.2"*. This is the result of nmap: [root@thearch ~]# nmap 192.168.254.0/30 Starting Nmap 7.12 ( https://nmap.org[1] ) at 2016-05-14 17:14 CEST Nmap scan report for 192.168.254.2 Host is up (0.0010s latency). Not shown: 995 filtered ports PORT STATE SERVICE 135/tcp open msrpc 139/tcp open netbios-ssn 445/tcp open microsoft-ds 5357/tcp open wsdapi 24800/tcp open unknown MAC Address: 52:54:00:96:11:A9 (QEMU virtual NIC) Nmap scan report for 192.168.254.1 Host is up (0.0000040s latency). Not shown: 999 closed ports PORT STATE SERVICE 53/tcp open domain Nmap done: 4 IP addresses (2 hosts up) scanned in 5.16 seconds I also did nmap from a non-root user: [christopher@thearch ~]$ nmap 192.168.254.0/30 Starting Nmap 7.12 ( https://nmap.org[2] ) at 2016-05-14 17:17 CEST Nmap scan report for 192.168.254.1 Host is up (0.000073s latency). Not shown: 999 closed ports PORT STATE SERVICE 53/tcp open domain Nmap done: 4 IP addresses (1 host up) scanned in 1.26 seconds As you can see, the host 192.168.254.2 is only found when running nmap with root, not with my other user. Pinging the guest still works however. I suspect this is the core of the issue, but I don't know how to solve it. Any suggestions are appreciated. Thanks, Christopher Mühl Links: 1. https://nmap.org/ 2. https://nmap.org/

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[libvirt-users] Connectiviity between Guest and Host
by christopher＠padarom.io 15 May '16

15 May '16

Hello everyone, I have followed this guide to enable my Windows 10 guest to reach my Arch Linux host: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/ht… My VM now has 2 NICs: - macvtap (VEPA) - virtual network 'isolated' I have statically assigned the IP 192.168.254.2 to my guest. The host's IP is 192.168.254.1. The interface it is using on the host is *virbr1*. I am able to ping the host from the guest and vice versa, so the network connectivity seems to be generally working. To control my VM I'd like to use Synergy which I have already set up and tested successfully once with the VM as the Server, but never since. When I try to connect the Synergy client from the host to a server running on the guest, I get the error *"failed to connect to server: address not found for: 192.168.254.2"*. This is the result of nmap: [root@thearch ~]# nmap 192.168.254.0/30 Starting Nmap 7.12 ( https://nmap.org ) at 2016-05-14 17:14 CEST Nmap scan report for 192.168.254.2 Host is up (0.0010s latency). Not shown: 995 filtered ports PORT STATE SERVICE 135/tcp open msrpc 139/tcp open netbios-ssn 445/tcp open microsoft-ds 5357/tcp open wsdapi 24800/tcp open unknown MAC Address: 52:54:00:96:11:A9 (QEMU virtual NIC) Nmap scan report for 192.168.254.1 Host is up (0.0000040s latency). Not shown: 999 closed ports PORT STATE SERVICE 53/tcp open domain Nmap done: 4 IP addresses (2 hosts up) scanned in 5.16 seconds I also did nmap from a non-root user: [christopher@thearch ~]$ nmap 192.168.254.0/30 Starting Nmap 7.12 ( https://nmap.org ) at 2016-05-14 17:17 CEST Nmap scan report for 192.168.254.1 Host is up (0.000073s latency). Not shown: 999 closed ports PORT STATE SERVICE 53/tcp open domain Nmap done: 4 IP addresses (1 host up) scanned in 1.26 seconds As you can see, the host 192.168.254.2 is only found when running nmap with root, not with my other user. Pinging the guest still works however. I suspect this is the core of the issue, but I don't know how to solve it. Any suggestions are appreciated. Thanks, Christopher Mühl

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[libvirt-users] libvirt + openvswitch, <parameters interfaceid='x'/> seems less-than-useful?
by Richard Harman 14 May '16

14 May '16

Hey folks, I'm working on setting up a Cuckoo sandbox malware lab at home, and can't seem to get openvswitch and libvirt to work together as-documented. I'm not subscribed to the list, so please reply-all. Thanks in advance! I've debugged this, and I think the interfaceid stuff in network XML isn't doing much besides setting a custom interfaceid in an OpenVSwitch table that really has no effect on the operation of OpenVSwitch. I think the -- set Interface vnet0 "external-ids:iface-id="{uuid here}" command run by libvirt doesn't actually set the _uuid of a new interface. :( It's just for an external system (e.g. libvirt) to track an interface *it* creates in OVS. I've got an OVS switch, "malware0" which is my malware lab network. I made a "monitor0" interface, and told OVS to make that a span/mirror of all the traffic on the malware0 switch. I attach monitor0 to my cuckoo VM, and boot the VM. Well, actually libvirt REALLY wants to create the interface itself, so I have to delete the monitor0 interface from OVS. I boot the VM, libvirt creates the monitor0 interface (with a different UUID) and it's not a span/mirror port any more. :( I had all the ports in the cuckoo VM <parameters interfaceid='{uuid here}'/>, but libvirt keeps deleting/creating ports and the OVS internal UUID changes, which means any setting applied in OVS (e.g. setting a port as a mirror) is lost during the add/delete cycle. With my cuckoo sandbox vm up: (no bfc10d05 UUID in ports, the mirror port UUID) # ovs-vsctl list bridge _uuid : 16847994-eb75-4e71-a913-50edd8a89252 mirrors : [bfc10d05-846e-4653-8417-27e1f648da93] name : "malware0" ports : [3931cb83-1f85-4fc8-880d-ffe299a85857, 6c6e3d97-d55b-4d55-8179-302412242664, 8eb4e13b-b5ea-4994-8e95-87d61db87ba6] With the cuckoo vm down: (393, 83b go away) # ovs-vsctl list bridge _uuid : 16847994-eb75-4e71-a913-50edd8a89252 mirrors : [bfc10d05-846e-4653-8417-27e1f648da93] name : "malware0" ports : [6c6e3d97-d55b-4d55-8179-302412242664] ... and lets bring up the cuckoo vm again: (only 6c6 remains) # ovs-vsctl list bridge _uuid : 16847994-eb75-4e71-a913-50edd8a89252 mirrors : [bfc10d05-846e-4653-8417-27e1f648da93] name : "malware0" ports : [1c09dd43-52d0-449b-81a2-537ddafb4966, 6c6e3d97-d55b-4d55-8179-302412242664, f90820f9-056f-47a3-bd51-c5190ad1df46]

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[libvirt-users] dhcpd (via systemd) @boottime which does not wait for the interface..
by lejeczek 14 May '16

14 May '16

hi users I have my dhcpd to serve nothing but virbr0 (libvirt), OS is Centos 7.2 Dhcpd would not start, complaining like this: No subnet declaration for virbr0 (no IPv4 addresses). ** Ignoring requests on virbr0. If this is not what you want, please write a subnet declaration in your dhcpd.conf file for the network segment to which interface virbr0 is attached. ** ##SELECTION_END## and systemctl -l shows: ... systemd[1]: start request repeated too quickly for dhcpd.service ... but suffice to restart dhcpd and all works! I'v customized systemd's service conf, I've put: After=libvirtd.service Requisite=libvirtd.service but this did not help. Would you share your thoughts? Systemd list say it's libvirt (wrong)doing. many thanks. L.

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[libvirt-users] vcpupin vs taskset performance difference
by Paraskevopoulos Georgios 13 May '16

13 May '16

Hi all, I am trying to run some performance tests using libvirt 1.2.17. For these tests it is necessary to set a specific affinity for the VCPUs of a running VM. The problem is, that I noticed a significant performance drop in my metrics when using 'vcpupin' from the virsh console instead of running 'taskset' natively. Specifically the methods I am comparing are 1. Using native shell taskset -a -cp $MY_CPUSET $MY_DOMAIN_PID 2. Using virsh console (performance ~30% down) for all $VCPUs virsh vcpupin my_domain -cpulist $MY_CPUSET -vcpu $VCPU -live virsh emulatorpin my_domain -cpulist $MY_CPUSET -live It seems that the usage of 'vcpupin' causes a performance drop even if it is run alongside 'taskset' on the same $CPU_SET Functionally everything seems to be working when I check the '/proc/' filesystem cat /proc/MY_DOMAIN_PID/*/status | grep Cpus_allowed_list My questions are: 1. Has anybody else noticed this? 2. Is this expected based on the implementation details? 3. Is this a bug that is fixed in a newer libvirt version? 4. Is there a solution to this issue? Thanks, George Paraskevopoulos Software Engineer (SDN/NFV), INTRACOM-TELECOM + 30 210 667 7689 <mailto:geopar@intracom-telecom.com> geopar(a)intracom-telecom.com 19.7 km Markopoulou Ave 19002 Peania, Athens, Greece The information in this e-mail message and any attachments are intended only for the individual or entity to whom it is addressed and may be confidential. If you have received this transmission in error, and you are not an intended recipient, be aware that any copying, disclosure, distribution or use of this transmission or its contents is prohibited. INTRACOM TELECOM and the sender accept no liability for any loss, disruption or damage to your data or computer system that may occur while using data contained in, or transmitted with, this email. Views or opinions expressed in this message may be those of the author and may not necessarily represent those of INTRACOM TELECOM.

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