- Users - libvirt List Archives

[libvirt-users] virsh blockcommit hangs at 100%
by zyro 19 Apr '14

19 Apr '14

hi, i am trying to blockcommit a external qcow2 snapshot back into its raw backing file like: sudo virsh blockcommit myDomainName vda --wait --verbose the output just shows: Block Commit: [100 %] and stays like that (i waited about an hour or so...). No "Commit complete" message. - explicitly passing --base and/or --top arguments makes no difference. - did not find a related log entry in syslog and consorts env: - ubuntu server 14.04 x64 - libvirt-bin 1.2.2-0ubuntu13 i doubt that it just takes hours to complete after "100%", right? any ideas? kind of a dead-end for me :/ thanks, zyro

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[libvirt-users] virtual subnet
by Lucio Crusca 18 Apr '14

18 Apr '14

Hello all, I need to setup a virtual subnet to create a test AD domain (server + clients): guests need to talk to each other, they need to reach the internet through a virtual router with nat (virbr0?), broadcasts must not reach the host nor the physical network (because of conflicts with the existing real AD domain) and libvirt must NOT offer a dhcp service inside the virtual subnet. What kind of networking model should I look at?

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[libvirt-users] What's the meaning of sub-element <ip address='X.X.X.X'> in <interface type='bridge'> of domain xml?
by Jianwei Hu 18 Apr '14

18 Apr '14

Hi guys, I saw this sub-element in http://libvirt.org/firewall.html, there is some confusion, what's the meaning of sub-element <ip address='X.X.X.X'> in <interface type='bridge'> of domain xml? The detail <interface> in domain xml as below: <interface type='bridge'> <mac address='52:54:00:56:44:32'/> <source bridge='br1'/> <ip address='10.X.X.X'/> <===it's my question <target dev='vnet0'/> <model type='virtio'/> <filterref filter='clean-traffic'/> </interface> Is it static IP(specified by customer) in guest OS? or a IP of interface(e.g. eno1) in "br1" on host machine? what's definition about it? [root@localhost src]# brctl show bridge name bridge id STP enabled interfaces br1 8000.24be051881ce no eno1 If you know how to use it, please show me a detail scenario. Thanks, Jianwei

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[libvirt-users] KVM guests unusable after install
by Jay Vyas 18 Apr '14

18 Apr '14

I'm finding that my KVM images are not bootable after i reboot my host, and i've detailed my problem here.... http://serverfault.com/questions/589806/kvm-machines-unbootable-after-host-… Any thoughts on why? Here is a repaste of the problem: **************************************************************************************** Im finding that my KVM guests are unusable after i reboot my host. Specifically, I always get this error: Booting from hard disk Boot failed: not a bootable disk What causes this error? I've tried toggling the VM disk type between qcow2 and raw, because a few articles online mentioned that this can happen if virt doesnt know the type of image to load, but that did not help. ** some more details ** I create My VMs from source using a command somewhat like this: base="http://mirror.pnl.gov/fedora/linux/releases/20/Fedora/x86_64/os/" nohup sudo virt-install --hvm --name $vm_name$i --ram 4000 \ --disk path=/VirtualMachines/$vm_name$i,size=30 \ --location $base -x "ks=http://xxx.os21.ks$kx"& My virsh file looks like this: 1 <domain type='kvm'> 2 <name>testFriApr11092714EDT2014_1</name> 3 <uuid>d4c86892-fb15-04ed-f4ab-7e3c76974ffc</uuid> 4 <memory unit='KiB'>4096000</memory> 5 <currentMemory unit='KiB'>4096000</currentMemory> 6 <vcpu placement='static'>1</vcpu> 7 <os> 8 <type arch='x86_64' machine='rhel6.4.0'>hvm</type> 9 <boot dev='hd'/> 10 </os> 11 <features> 12 <acpi/> 13 <apic/> 14 <pae/> 15 </features> 16 <clock offset='utc'/> 17 <on_poweroff>destroy</on_poweroff> 18 <on_reboot>restart</on_reboot> 19 <on_crash>restart</on_crash> 20 <devices> 21 <emulator>/usr/libexec/qemu-kvm</emulator> 22 <disk type='file' device='disk'> 23 <driver name='qemu' type='raw' cache='none'/> 24 <source file='/VirtualMachines/testFriApr11092714EDT2014_1'/> 25 <target dev='hda' bus='ide'/> 26 <address type='drive' controller='0' bus='0' target='0' unit='0'/> 27 </disk> 28 <controller type='usb' index='0'> 29 <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> 30 </controller> 31 <controller type='ide' index='0'> 32 <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> 33 </controller> 34 <interface type='network'> -- Jay Vyas http://jayunit100.blogspot.com

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[libvirt-users] "failed to send audit message operation not permitted"
by Pasquale Dir 18 Apr '14

18 Apr '14

Hello, I have a remote ubuntu server on which I have a kvm hypervisor installed. Now, on my ubuntu desktop, I create a new connection with virt-manager and start a remote guest. The guest successfully starts, however I can't see it in the console and, on client side, I get that remote user closed it. Looking at the /var/log/libvirtd on the server side I get that error: "failed to send audit message operation not permitted" I tried to call "virsh console myDomain" on the remote server and what I get is that the console freezes. The log is always the same, operation not permitted. Here's the complete one: 2014-04-17 18:26:26.532+0000: 2985: warning : virAuditSend:135 : Failed to send audit message virt=kvm op=stop reason=destroyed vm="dhcpVPN" uuid=929bac48-b87c-9f6f-156a-5c066bf36085 vm-pid=-1: Operation not permitted Where the problem could be? Pasquale

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[libvirt-users] libvirt with glusterfs problem
by lyz_pro 17 Apr '14

17 Apr '14

Hi I have two node: hcg3, hcg4 which run glusterfs Also run libvirtd on each node. The problem cames when I use `virsh attach-device` to attach a glusterfs type disk . My device xml like: <disk type="network" device="disk"> <driver name="qemu" type="raw" cache="none"/> <source protocol="gluster" name="h2312v3/volume-257e07bd-9e80-4d06-8d6d-5f83979de1fd"> <host name="hcg4"/> </source> <target bus="virtio" dev="vdb"/> <serial>257e07bd-9e80-4d06-8d6d-5f83979de1fd</serial> </disk> when I attach a gluster disk to a domain running on hcg4. the above xml work great. BUT when I try to change the tag `host` name attribute to hcg3, the attach action will fail with output: error: Requested operation is not valid: domain is not running Also: I can use `qemu-kvm` command to start vm successful with gluster://hcg3 or gluster://hcg4. I have stop both nodes' iptables. and my libvirt and qemu version is : Compiled against library: libvirt 1.1.4 Using library: libvirt 1.1.4 Using API: QEMU 1.1.4 Running hypervisor: QEMU 1.6.2 glusterfs-3.4.1-3.el6.x86_64 -------------- lyz_pro 2014-04-11

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[libvirt-users] Snapshots
by lukass.vacek＠seznam.cz 17 Apr '14

17 Apr '14

Hello, I would like to ask what I am doing wrong and what is the best approach to resolve this situation: First of all I start virtual machine by virDomainCreateXML. In my application I use libvncclient library that sends mouse events to this running domain. I had some troubles with coordinates of mouse cursor but all problem was solved when I added <input type='tablet' bus='usb'/> to xml configuration. So now I have a running domain and I want to create snapshot and then after some operations I want to restore this snapshot. I use virDomainSave and virDomainRestore that work fine. The only problem is, that after creating and restoring snapshot I have the same problem with coordinates of mouse. I need to create and restore snapshot also with <input type='tablet' bus= 'usb'/> somewhere specified. I also tried methods virDomainSaveFlags with xml configuration string(see below) as parameter *dxml, but method fails with: libvir: Domain Config error : XML error: domainsnapshot.Unable to create snapshot. What should I add to xml configuration? I look at http://libvirt.org/ formatsnapshot.html on example but I dont know what paths I should use in my program. I dont understand much snapshots and similar stuff so could you give me example how could I edit my xml configuration? Or what I should do to make virDomainSave and virDomainRestore work? xml configuration: <domain type='kvm'> <name>Name</name> <uuid>c7a5fdbd-cdaf-9455-926a-d65c16db1810</uuid> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu>2</vcpu> <os> <type arch='x86_64' machine='pc'>hvm</type> <boot dev='hd'/> </os> <devices> <input type='tablet' bus='usb'/> <emulator>/usr/bin/qemu-system-x86_64</emulator> <disk type='file' device='disk'> <source file='/home/lukas/Desktop/Image.img'/> <target dev='hda'/> </disk> <interface type='network'> <source network='default'/> </interface> <graphics type='vnc' port='5901'> <listen type='address' address='127.0.0.1'/> </graphics> </devices> </domain>

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Re: [libvirt-users] [virt-tools-list] live-migrating a VM whose current host's storage is fubar'ed
by Cole Robinson 17 Apr '14

17 Apr '14

On 04/15/2014 05:16 PM, Digimer wrote: > Hi all, > > For those on the linux-cluster list, this is a similar question to my > post[1] there. > > I recently had a client destroy their node's RAID array (they yanked hard > drives until the array was destroyed). The VMs running on the node continued > to operate for another hour, impressively. Their storage was based on DRBD, so > the VM's storage just started going to/from the other node's storage. > > The problem was when I tried to migrate them off of the damaged node to a > healthy node. Without being able to write to the logs (I assume), the > migration failed. In the end, I had to force-off the damaged host and reboot > the VMs on the backup node. This caused an outage which, I think, could have > been avoided. > > So my question is; Can VMs be migrated if/when the host's FS is > read-only/destroyed? If so, how? > > Thanks! > > 1. https://www.redhat.com/archives/linux-cluster/2014-April/msg00010.html > Probably a better question for libvirt lists, CCd, but I don't think anyone tests a scenario like that so there's bound to be problems. - Cole

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[libvirt-users] LXC vCPU controlling problem
by Xingjun Wang 16 Apr '14

16 Apr '14

Hi,guys! I've been using libvirt-1.1.1 with LXC1.0.0 to do my CS homework.But I met a problem when I tried to set vcpu for a LXC.The /sys/fs/cgroup/cpuset/machine/cpuset.cpus always show 0-3 no matter how many vcpu I defined in the XML setting file. But I found the command "virsh -c lxc:/// domaininfo lxc_name" got the right number as it is defined. What's the problem there? Is it a bug in libvirt-1.1.1? Thank you!

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Re: [libvirt-users] LXC + USB passthrough = Operation not permitted
by WANG Cheng D 15 Apr '14

15 Apr '14

Dear Fil, I am not sure if my answer can help you. I had ever asked a similar question to Daniel and I was using a thirty-party card. As a container uses a shared kernel with the host, so hostdev mode='subsystem' doesn't make sense. Maybe you can try to use hostdev mode='capabilities'. Please see http://libvirt.org/formatdomain.html#elementsHostDevCaps Hope this helps Cheng Wang

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[libvirt-users] Changing dnsmasq DNS settings for virtual machines
by Johannes Kastl 15 Apr '14

15 Apr '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi everyone, maybe this is an old fart, but I cant get it to work. I am running libvirt on a laptop, where a dnsmasq is already running to delegate dns info for my local (not-public) network. My resolv.conf (on the host) lists the system-dnsmasq as first server. I had to set the listen-adress for the system-dnsmasq to 127.0.0.1 and set bind-interfaces, to stop if from binding to all interfaces and overriding the libvirtd-dnsmasq, which also has dhcp enabled. Now, how can I tell the libvirtd-dnsmasq, to use the system-dnsmasq as first nameserver? I found lots of pages when searching for "libvirt dns", but all of them only show the dhcp-part of the network's xml file: http://wiki.libvirt.org/page/VirtualNetworking#DNS_.26_DHCP > <ip address="192.168.122.1" netmask="255.255.255.0"> <dhcp> <range > start="192.168.122.100" end="192.168.122.254" /> <host > mac="00:16:3e:e2:ed" name="foo.example.com" ip="192.168.122.10" /> > </dhcp> </ip> One possible workaround: My system-dnsmasq reads /etc/hosts_whatever, and apparently the libvirtd-dnsmasq reads var/lib/libvirt/dnsmasq/NETWORK_NAME.addnhosts. I could copy my hosts_whatever in that place, but I had to configure the libvirtd-dnsmasq what my local domains are. Which brings me to the next question: How to set the addn-hosts= for the libvirtd-dnsmasq in the xml file? Regards, Johannes - -- A good sermon should be like a woman's skirt: short enough to arouse interest but long enough to cover the essentials. (Ronald Knox) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) Comment: Using GnuPG with SeaMonkey - http://www.enigmail.net/ iEYEARECAAYFAlNA5zMACgkQzi3gQ/xETbJBVACeLV9j/TDxgnImAsyEtotUBJ2J OD0An2WDBWUoqCUvmoquk4pwoKplfu/T =g6YM -----END PGP SIGNATURE-----

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[libvirt-users] Is it possible to get the vm which is using a storage pool's volume?
by Pasquale Dir 15 Apr '14

15 Apr '14

Hello, how can I programmatically get the vm which is currently using a storage volume? I looked at the apis but I can't find anything about it. Pasquale

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[libvirt-users] libvirt and glusterfs integrate problem
by lyz_pro 15 Apr '14

15 Apr '14

Hi everyone I have a problem when use libvirt and glusterfs. When I use libvirt to start a vm with glusterfs disk. the operation will block. after I `CTL + c` the 'virsh start domainxx' comand , I use `virsh list` will find the vm in a strange state, kind like follow: Id Name State ---------------------------------------------------- 20 vm10 shut off and I when I start the vm again, It will promote the vm is in active. the xml as follow (172.16.32.16 is a glusterfs node): <domain type='kvm' id='20'> <name>vm10</name> <uuid>12208c14-3990-c134-2653-8a828ff1eb1d</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>4</vcpu> <resource> <partition>/machine</partition> </resource> <os> <type arch='x86_64' machine='rhel6.5.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='localtime'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='network' device='disk'> <driver name='qemu' type='qcow2'/> <source protocol='gluster' name='h2216v5/tmp/vm10.img'> <host name='172.16.32.16'/> </source> <target dev='hda' bus='ide'/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='usb' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='pci' index='0' model='pci-root'> <alias name='pci.0'/> </controller> <interface type='bridge'> <mac address='00:0c:29:2f:aa:b1'/> <source bridge='virbr0'/> <target dev='vnet91'/> <model type='rtl8139'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5991' autoport='yes' listen='172.16.32.3' keymap='en-us'> <listen type='address' address='172.16.32.3'/> </graphics> <video> <model type='cirrus' vram='9216' 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='0x04' function='0x0'/> </memballoon> </devices> <seclabel type='none'/> </domain> Also: I can use `qemu-kvm` command to start vm successful with gluster://172.16.32.16 I have stop both nodes' iptables. and my libvirt and qemu version is : Compiled against library: libvirt 1.1.4 Using library: libvirt 1.1.4 Using API: QEMU 1.1.4 Running hypervisor: QEMU 1.6.2 glusterfs-3.4.1-3.el6.x86_64 -------------- lyz_pro 2014-04-14

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[libvirt-users] libvirt Java - vmware (esx driver)
by Mihai Cazacu 14 Apr '14

14 Apr '14

Hi, I'm trying to connect to a VMware vCenter Server (Version 5.0.0 Build 1300600) using this code: class CustomConnectAuth extends ConnectAuth { > CustomConnectAuth() { > // credType = ... // ... > } > @Override > int callback(Credential[] cred) { > // ... > return 0 > } > } > ConnectAuth auth = new CustomConnectAuth() > Connect conn = new Connect("esx://USERNAME@HOSTNAME/sdk?no_verify=1", > auth, 0) and I've got this error message: libvirt: error : unsupported configuration: *libvirt was built without the > 'esx' driver* If I use the vijava client, the connection works fine. ServiceInstance serviceInstance = new ServiceInstance(new URL(" > https://HOSTNAME/sdk"), USERNAME, PASSWORD, true) ... Some environment info: os: Ubuntu 13.10 > jdk: 1.7.0_51-b13 > Java client: org.libvirt:libvirt:0.5.1 Can you help, please? Thanks, Mihai -- Mihai Cazacu Software Engineer E-mail: cazacugmihai(a)gmail.com Mobile: +40 745 254 657 Linkedin: cazacugmihai <http://www.linkedin.com/in/cazacugmihai> Skype: cazacugmihai Twitter: cazacugmihai

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[libvirt-users] Setting elevator=noop in the guest necessary?
by Johannes Kastl 14 Apr '14

14 Apr '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi everyone, I found an article about libvirt, and one thing that I have not seen anywhere else: > IMPORTANT: If you boot a Linux VM, you might want to add > “elevator=noop” to your Linux boot command line to force the disk > scheduler to let the host machine handle the disk writes > reorganisations (like tunnelling tcp over tcp, it is bad to have > two schedulers trying to do each other’s job). For example, on > GRUB2 on Debian, you have to append “elevator=noop” after > GRUB_CMDLINE_LINUX in /etc/default/grub. (from http://blog.normation.com/en/2012/03/09/a-guide-to-the-everyday-use-of-libv…) Is this necessary? Or is this even a good idea? Is this outdated? Or does it depend on the kind of hypervisor (XEN, KVM,...)? The few qemu/KVM-machines I have tested did work fine without this, although at this point I just set them up and did a few program installations, no real 'workload'. Thanks in advance. Regards, Johannes - -- ...Unix, MS-DOS, and Windows NT (also known as the Good, the Bad, and the Ugly). (Matt Welsh) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with SeaMonkey - http://www.enigmail.net/ iEYEARECAAYFAlNK5UUACgkQzi3gQ/xETbK9jQCePXXY87HpDrufk8tKvaI+JhR9 uGQAoJjxU/B8Z8sGvQS/iPUZNsQtM/Il =sjGR -----END PGP SIGNATURE-----

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[libvirt-users] libvirt: error : internal error: cannot apply process capabilities -1
by Santhosh Kokala 11 Apr '14

11 Apr '14

Hi All, I am running libvirt-1.1.2 on Scientific Linux release 6.1 (Carbon). I compiled the libvirtd rpms and installed them on to my system. I see this error 2014-04-11 05:37:42.351+0000: 12378: error : virCommandWait:2348 : internal error: Child process (LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin /usr/libexec/qemu-kvm -help) unexpected exit status 1: libvirt: error : internal error: cannot apply process capabilities -1 Whenever libvirtd restarts. Because of this error I also cannot create a domain with os_type set to "hvm". Virsh capabilities also does not list this os_type. Can someone let me if I am missing something obvious? Santhosh

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[libvirt-users] Help with understanding and solving snapshot problem
by rolf 11 Apr '14

11 Apr '14

Hello Fairly new to libvirt. I’m hoping to both solve a problem with this question as well as learn more detail about how libvirt works. Using RHEL 6.4 and libvirt version is 0.10.2 and qemu-img version is 0.12.1.2 Using virt-manager I created a VM. Nothing unusual as far as I can see. I then added a disk. So I have a second virtio based volume which the guest then mounts as a separate filesystem. At some stage after that I created a snapshot of the system. I can’t delete the snapshot. The end result is I’d like to create a snapshot that excludes the second (much larger) disk - that is backed up via conventional backup systems. But the issue is first deleting the snapshot and my understanding of what its saying. So here is some basic info: # virsh snapshot-list host1 Name Creation Time State ------------------------------------------------------------ snap1-host1 2014-01-19 16:59:10 +1100 shutoff # # virsh snapshot-info host1 --current Name: snap1-host1 Domain: host1 Current: yes State: shutoff Location: internal Parent: - Children: 0 Descendants: 0 Metadata: yes So I try and delete it: # virsh snapshot-delete host1 --current error: Failed to delete snapshot snap1-host1 error: unsupported configuration: deletion of 1 external disk snapshots not supported yet Why does it say “external” in the above error, when the snapshot-info says its Location is internal? Are they not related ideas? The img file /var/lib/libvirt/images/host1.img is not being used by KVM. the snapshot files are in use instead: # virsh domblklist host1 Target Source ------------------------------------------------ vda /var/lib/libvirt/snap1-host1.qcow2 vdb /var/lib/libvirt/snap1-host1-db.qcow2 hdc - Querying them: # qemu-img info /var/lib/libvirt/snap1-host1.qcow2 image: /var/lib/libvirt/snap1-host1.qcow2 file format: qcow2 virtual size: 24G (25769803776 bytes) disk size: 3.5G cluster_size: 65536 [root@cocoa libvirt]# qemu-img info /var/lib/libvirt/snap1-host1-db.qcow2 image: /var/lib/libvirt/snap1-host1-db.qcow2 file format: qcow2 virtual size: 1.6T (1800279089664 bytes) disk size: 325G cluster_size: 65536 What have I done wrong and how can I correct this so I can discard the existing snapshot and have a snapshot of the system excluding the second disk (and optionally which I can re-take at intervals and discard old ones)? Many thanks, rolf.

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[libvirt-users] Windows 2008r2 guest tcp retransmit hangs
by Dennis Jacobfeuerborn 11 Apr '14

11 Apr '14

Hi, I'm currently investigating a problem with our windows 2008r2 guest on centos 6 hosts. The issue is that the windows system sometimes sees a SYN packet for a tcp connection but doesn't respond. Three seconds later the retransmitted packet arrives and this time windows decides to proceed normally with the connection. This is with the virtio drivers but I have now switched to the e1000 driver where the problem also occurs but not quite as badly as with virtio which leads me to speculate that the driver isn't really the problem but only affects whatever the real issue is. Also this does not happen when the systems primary IP is addressed directly but only when an IP on the loopback device is addressed through a load-balancer. I've also provisioned a linux guest on the same host and put that into the load balancer as well but there everything is fine. Has anyone run into this and can provide a pointer in the right direction? Regards, Dennis

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[libvirt-users] passthrough filesystem (9p) permissions issues on Fedora 20
by David Mansfield 11 Apr '14

11 Apr '14

Hello All: I've gotten a passthrough filesystem to work (as in, to mount) in my vm (guest F20, host F20), but due to the fact that the qemu-kvm process runs as "qemu" user, I cannot access "my" files from the share. Both the guest and the host are running SSSD so the user/group mapping is identical. Other than putting 'user = "root"' it /etc/libvirt/qemu.conf, is there a way to get this to work without trashing all of the file permissions on the directory? Even if I do put the user=root, I imagine selinux will become a major headache anyway. So is there a roadmap for how to get this working? -- Thanks, David Mansfield Cobite, INC.

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[libvirt-users] disk iotune
by Doron Fediuck 10 Apr '14

10 Apr '14

Hi, reading the below[1] on blkdeviotune made me wonder if we can dynamically change the values after the VM is already running using iotune. Is it supported? Thanks, Doron [1] https://fedoraproject.org/wiki/QA:Testcase_Virtualization_IO_Throttling

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[libvirt-users] Passing non-standard Options through Libvirt to QEMU
by Asadullah Hussain 10 Apr '14

10 Apr '14

Hello, I have a custom QEMU which requires some non-standard command line arguments to launch a VM. e.g., "--proc-type=secondary" option is always required to launch a QEMU VM. To launch the VM through libvirt (virsh) "How do I specify these non-standard options in XML? OR if thats not possible ,Can you guide me at which point (code file) libvirt converts the XML to QEMU command (so that I can insert the option there). Regards -- Asadullah Hussain

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[libvirt-users] method for communication between containers
by WANG Cheng D 09 Apr '14

09 Apr '14

Dear all, In my system, two containers need to exchange data as quick as possible and the two containers are hosted by the same physical machine, I wonder if socket is the only method for communication between containers? Thank you. Cheng Wang

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[libvirt-users] Question regarding ssh and lxc
by Schulz, Arno 09 Apr '14

09 Apr '14

I'm trying to narrow down the source of a bug where a docker container sshd closes the connection after a successful authentication (https://bugzilla.redhat.com/show_bug.cgi?id=1085081) - filed with libvirt as there's no docker-io component for RHEL 6.5 in bugzilla. One of the steps I'm taking is to reproduce a similar setup using LXC but while it seemed to have worked I'm not sure I've properly reproduced the setup I would have with docker. I've based myself on the RHEL 7b Linux Container Guide 1. Created a HelloWorld containe based on the sample config file <domain type='lxc'> <name>test-container</name> <memory>102400</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <devices> <console type='pty'/> </devices> </domain> 2. Defined, started and connected to it using virsh 3. Obtained the ip and started sshd 4. And when I logged in via sshd I got the bash from the host Any assistance would be appreciated. Arno -------------------- Confidentiality Statement - The contents of this e-mail, including its attachment, are intended for the exclusive use of the recipient and may contain confidential or privileged information. If you are not the intended recipient, you are strictly prohibited from reading, using, disclosing, copying, or distributing this e-mail or any of its contents. If you received this e-mail in error, please notify the sender by reply e-mail immediately or the Privacy Office (privacy(a)ottawahospital.on.ca ) and permanently delete this e-mail and its attachments, along with any copies thereof. Thank you. Avis de confidentialit� � Ce courriel, y compris ses pi�ces jointes, s�adresse au destinataire uniquement et pourrait contenir des renseignements confidentiels. Si vous n��tes pas le bon destinataire, il est strictement interdit de lire, d�utiliser, de divulguer, de copier ou de diffuser ce courriel ou son contenu, en partie ou en entier. Si vous avez re�u ce courriel par erreur, veuillez en informer imm�diatement l�exp�diteur ou le bureau de la Protection des renseignements personnels (info.privee(a)hopitalottawa.on.ca) puis effacez le courriel ainsi que les pi�ces jointes et toute autre copie. Merci. --------------------

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[libvirt-users] Not able to start a VM - Xen and libvirt
by Aravindhan Dhanasekaran 09 Apr '14

09 Apr '14

Hello, I've installed Xen 4.3.1 on a machine with x86 based 64-bit Intel processor running Fedora 20 (Linux 3.11) and libvirt 1.0.1. I'm not able to start a VM. It's failing with the below mentioned error. What am I doing wrong? If this is documented somewhere, a pointer to that would be great. I did a "generic" search, but in vain, before posting to this list and I couldn't find an easier way to search through the mailman archives of this mailing list. Thanks for your time. Aravind Error starting domain: internal error: libxenlight failed to create new domain 'vm1' Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 91, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 127, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1355, in startup self._backend.create() File "/usr/lib64/python2.7/site-packages/libvirt.py", line 708, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: internal error: libxenlight failed to create new domain 'vm1'

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[libvirt-users] Issue with 1.2.3 and lxcCheckNetNsSupport
by Thierry Parmentelat 09 Apr '14

09 Apr '14

Hi there I’ve just moved to libvirt-1.2.3 from 1.2.1; we use it for dealing with lxc containers I just wanted to report that everything went well for us with this new release, except for one little glitch At some point the lxc drivers seems to check that the kernel indeed has the netns feature built in Well in our environment this checks miserably fails; I haven’t been able to tell exactly why, but could find this post that might be related Bug 1050210 – lxcCheckNetNsSupport fails to detect NETNS As a quick workaround I have this patch below in place, with which everything else seems to be working fine; at least all our system tests are passing.. It feels like the way the 1.2.3 code checks for the presence of netns is clearly not exactly right (in our case selinux is disabled), and I wish a more reliable solution can be found in the future :) Hope this helps — Thanks in any case

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