similar to: how to disable vnet_hdr through libvirt

Thank you Daniel. How difficult to extend libvirt for this? One critical application on my VM needs to turn vnet_hdr off. I can switch to use qemu directly. However, in that way I will lose all the nice things provided by libvirt. Thanks, ~Jianfeng On 3/3/14 3:53 AM, "Daniel P. Berrange" <berrange@redhat.com> wrote: >On Fri, Feb 28, 2014 at 07:11:13PM +0000, Jianfeng Tang

Daniel P. Berrange <berrange@...> writes: > > On Tue, Mar 04, 2014 at 03:56:06PM +0000, Jianfeng Tang wrote: > > Thank you Daniel. How difficult to extend libvirt for this? One critical > > application on my VM needs to turn vnet_hdr off. > > Can you explain why in more detail. We don't expose this as a configurable > setting because we don't believe

On Fri, Feb 28, 2014 at 07:11:13PM +0000, Jianfeng Tang wrote: > Hi, > > I am using libvirt and virsh to create my VM on KVM. It works fine. > However, I need to turn off vnet_hdr for virtio interface. > > Does anyone know how to do it through libvirt? There's no support for disabling it - if we detect a host which supports it, it will be unconditionally enabled. Regards,

On Tue, Mar 04, 2014 at 03:56:06PM +0000, Jianfeng Tang wrote: > Thank you Daniel. How difficult to extend libvirt for this? One critical > application on my VM needs to turn vnet_hdr off. Can you explain why in more detail. We don't expose this as a configurable setting because we don't believe there's any compelling reason to disable it. ie it offers clear performance benefits

Hello, On KubeVirt, we are trying to pre-create a tap device, then instruct libvirt to consume it (via the type=ethernet , managed='no' attributes). It works as expected, **unless** when we create a multi-queue tap device. The difference when creating the tap device is that we set the multi-queue flag; libvirt throws the following error when consuming it: ``` LibvirtError(Code=38,

On Wed, Sep 23, 2020 at 05:44:28PM +0100, Daniel P. Berrangé wrote: > On Tue, Sep 22, 2020 at 01:48:08PM +0200, Miguel Duarte de Mora Barroso wrote: > > Hello, > > > > On KubeVirt, we are trying to pre-create a tap device, then instruct > > libvirt to consume it (via the type=ethernet , managed='no' > > attributes). > > > > It works as

Hi Daniel, I changed the libvirt code to support "-net dump" because it is more comfortable to me and to users here. I don't know if it is interesting to the community, but... most of the code is ready if someone needs. Julio Cesar Faracco 2016-05-05 10:34 GMT-03:00 Daniel P. Berrange <berrange@redhat.com>: > On Wed, May 04, 2016 at 12:37:14PM -0300, Julio Faracco wrote:

Hi all, I have been trying to set cpu_exclusive flag. Now I can do it using "echo". I want to know is there any other way (an API) to set this flag? Is it possible to set this flag using API? Thanks.   ~Peeyush Gupta

Hey guys, I'm so glad you added the new set of virConnectListAllDomains functions, it simplifies a lot our work!. I was only wondering why there is no support for PowerVM. Is it that it hasn't been developed or is there some technical hardship? Best, Camilo Aguilar

Hello, I was getting the following error in syslog: libvirtd: 21:19:12.116: 10955: error : qemudDispatchServer:1355 : Too many active clients (20), dropping connection from 127.0.0.1;0 I investigated a bit and tried the following in a python console: import libvirt ~~~~ conn=libvirt.openReadOnly("qemu+ssh://HOST_IP/system<http://10.16.71.1/system> ") //now check the no. of

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

Hi there I’m not quite proficient with libvirt yet, and have been using it so far primarily to manage lxc containers I was hoping to find a means to configure the set of capabilities that guests should drop, but came across a few web pages suggesting these were set in stone in the code is this correct, or is there a means to tweak this set from the host via the xml config or a virsh command ?

Hello! I am currently experimenting a bit with some of the LXC support under libvirt, and in trying to utilize the tool virt-login-shell, I encounter the following error: [james@lxchost ~]$ virt-login-shell libvirt: error : argument unsupported: Security model none cannot be entered Though it should be apparent from the lack of error, the domain is most definitely running. [root@lxchost

Hi guys, Does anybody know how to dump the network trafic from each virtual machine using libvirt? Here, we usually use VPN softwares and other network tools inside Virtual Machines (Windows and Linux). Sometimes, this applications does not work properly, so we need to dump the network traffic of each Virtual Machine to compare and debug. How can I enable it using libvirt? I know that if you

Dear All, I want to start my application automatically after I start the container with a virsh command " virsh -c lxc:/// start mycontainer" How can I achieve this? Thank you in advance. Cheng

Hi, for tl;dr people: how we can get uuid or name of a vm within a guest os? description: We are trying to implement a guest-agent for Archipel* to let us run simple commands on guest os**. in archipel each vm has its own jid (jabber id), user will open a chat conversation to vm's jid and send messages like "!exec ls", then we check that user (jid) who sent !exec has permission to

> Hi, I plan to use KVM internal network 'default' and grep dhcp log to figure out the IP address that assigned to my VM. I know I can configure static ip but I like to assign ip dynamically to avoid mgmt cost. Does anyone know where the dhcp log is? My KVM host is running Ubuntu Raring (13.04). It does not have file /var/log/daemon.log as some online doc mentioned. Thanks,

Hi there, I'm interested in using libvirt-lxc on armv7l architecture and I have a hard time building libvirt. 1. Are there any prebuild rpms for ARM? 2. I have many dependency issues during build: error: *** Error Summary *** === the following packages failed to build due to missing build dependencies === libvirt: nothing provides hal-devel nothing provides

On Tue, Mar 04, 2014 at 02:09:19PM -0700, Eric Blake wrote: > On 03/04/2014 05:12 AM, Asadullah Hussain wrote: > > Hello I have manually compiled a customized qemu (1.4.0) which runs fine on > > its own (create VM etc) but I want to access this qemu through libvirt > > (virt-manager, virsh etc). > > > > But the libvirt driver only looks into "/usr/bin"

On 06.11.2013 16:17, Michal Privoznik wrote: > On 06.11.2013 11:23, TSADOK, Shlomi (Shlomi) wrote: >> [...] > > http://libvirt.org/hooks.html#recursive > > Do not do this. > > Michal > Maybe I should explain a bit why this is not supported. It's true that libvirt is multithreaded. However, not in terms of multiple write/modify accesses to a single domain.