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[libvirt-users] Fwd: How to get guest's cpu and mem usage with Java APIs
by Enrico De Maio 11 Mar '14

11 Mar '14

I would like to know how much memory and cpu virtual machine are using so yes guest's perspective. I'm building a web app that has to alert the user when the vm is going to be stressed and I would like to do this in terms of mem and cpu usage. Thanks in advance for your support, Enrico De Maio On Mon, Mar 10, 2014 at 7:16 PM, Eric Blake <eblake(a)redhat.com> wrote: > On 03/10/2014 04:54 AM, Enrico De Maio wrote: > > Hi everybody, > > > > I'm using libvirt java api bindings for my thesis. I would like to know > if > > there is a way to obtain live information about cpu and mem usage of a > > domain. > > Are you asking the question from the host's perspective (how much > resources has the host given to the guest) or from the guest's > perspective (how much is the guest actively using, even if the host has > given it more)? Libvirt already provides several API calls. such as the > ones used by 'virsh cpu-stats' and 'virsh dommemstat'; you may have to > do some code reading to figure out what C calls the virsh code made in > order to find the same API under the Java bindings. > > -- > Eric Blake eblake redhat com +1-919-301-3266 > Libvirt virtualization library http://libvirt.org > >

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[libvirt-users] How to get guest's cpu and mem usage with Java APIs
by Enrico De Maio 11 Mar '14

11 Mar '14

Hi everybody, I'm using libvirt java api bindings for my thesis. I would like to know if there is a way to obtain live information about cpu and mem usage of a domain. Regards, Enrico De Maio Skype: enrico.de.maio Mobile: +39 338 205 3397

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[libvirt-users] Question about virtio drivers
by pa1n_0 10 Mar '14

10 Mar '14

Hello, Any ideas from which version of virtio drivers support well high-end configuration like >= 8 physicals CPUs and >=24Go. I know that using the last version is the way to do but someone would like to know an accurate version. Thanks for answer.

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[libvirt-users] "connection refused", but server is listening
by Pasquale Dir 09 Mar '14

09 Mar '14

netstat -lptu gives me tcp6 0 0 [::]:16514 [::]:* LISTEN 1314/libvirtd so the server is correctly listening on interfaces. My /etc/libvirt/libvirtd settings are defaulted. My /etc/default/libvirt-bin has "-d -l" options so server is listening. If I do virsh -c qemu://143.225.229.190/system (that is my ip or an ip belonging to my network) I get "connection refused". How come? And note that if I put my address, 143.225.229.190, as listening address in the libvirtd conf file, I get "this address class is not supported".

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[libvirt-users] create ovs port without root
by Vasiliy Tolstov 08 Mar '14

08 Mar '14

Hello! How can i operate with openvswitch without root rights? For example - i can add my user to kvm group and create vm from libvirt with my own user, but now i'm failed with creating port. errors in logs: Mar 06 14:04:46 selfip.ru ovs-vsctl[19065]: ovs|00001|vsctl|INFO|Called as ovs-vsctl --timeout=5 -- --if-exists del-port Mar 06 14:04:46 selfip.ru ovs-vsctl[19065]: ovs|00002|vsctl|ERR|'del-port' command requires at least 1 arguments Mar 06 14:04:46 selfip.ru libvirtd[6418]: internal error: Child process (ovs-vsctl --timeout=5 -- --if-exists del-port) unexpected exit status 1: ovs-vsctl: 'del-port' command requires at least 1 arguments Mar 06 14:04:46 selfip.ru libvirtd[6418]: Unable to delete port (null) from OVS: Operation not permitted -- Vasiliy Tolstov, e-mail: v.tolstov(a)selfip.ru jabber: vase(a)selfip.ru

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[libvirt-users] ISO refuses to let vm starts (and is not mentioned in config)
by Mauricio Tavares 07 Mar '14

07 Mar '14

Trying to start one of my vms, a centos one at that, but am getting the following message: [root@vmhost ~]# virsh start voip --paused error: Failed to start domain voip error: cannot open file '/var/tmp/FreePBX-5.211.65-3-x86_64-Full-1388073872.iso': No such file or directory [root@vmhost ~]# But, virsh dumpxml voip shows no info onto the .iso <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source file='/dev/vmhost_vg0/voip'/> <target dev='vda' bus='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hda' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdb' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='1'/> </disk> Log file is not particularly helpful: 2014-03-04 22:57:46.121+0000: shutting down 2014-03-05 23:42:18.528+0000: shutting down 2014-03-05 23:47:07.375+0000: shutting down 2014-03-06 00:56:32.908+0000: shutting down 2014-03-06 01:11:32.582+0000: shutting down So, the question is how did this iso got involved in this specific vm? I can start my other vms without them even knowing about this .iso.

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[libvirt-users] Attaching a hostdev on startup
by Mat Arge 07 Mar '14

07 Mar '14

Hello! I have written a script which attaches some USB tokens as hostdev devices to (qemu) VMs managed by libvirt. This works fine as long as I call the script manually. But what I really want to do, is run this scrip from a startup hook, so that whenever a Vm is started, it looks if there are appopriate tokens available for attachment. But when the script is run from the hook, it (along with the whole libvirtd) freezes. That doesn't really come as a surprise, since http://libvirt.org/hooks.html explicitely states A hook script must not call back into libvirt, as the libvirt daemon is already waiting for the script to exit. A deadlock is likely to occur. How can I get around this problem? cheers Mat

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[libvirt-users] Providing fallback DNS servers via DHCP
by Florian Rüchel 07 Mar '14

07 Mar '14

Hello everyone, TL;DR: Is ist possible to provide a secondary DNS (e.g. 8.8.8.8) via DHCP in addition to the gateway (in my case 10.0.1.1)? I use libvirt to manage all my qemu-based VMs. I have set up a local NAT-network which includes all my VMs (and some physical servers integrated via VPN). Everything works fine, but ocassionally, I have to restart the network (when I add instances for example). In that case, my VMs loose their local network connection until I restart them. However, some instances can not be restarted at will and so a change in network configuration means they loose their local connectivity. However, they still have a second network device that has an external static IP. This IP can still connect and be connected to, so it is feasible to loose the connection on the local network. Unfortunately though, libvirt (through dnsmasq's DHCP) broadcasts itself as the only DNS. This results in name resolution going down. If I add e.g. 8.8.8.8 to resolv.conf, I can resolve names again (except local ones, of course). So it would be nice if the DHCP would directly supply additional DNS servers. For dnsmasq, I would add to the configuration something like dhcp-option=6,0.0.0.0,8.8.8.8 However, looking through the archive, I found that you guys prefer to keep it implementation agnostic and thus you do not provide the option to set this directly (since this is dnsmasq-only). So I was wondering if there is any way to achieve this with libvirt? Is there already an implemented way I could not find? Or is there maybe a *generic* option to provide some kind of extra-configuration specific to the implementation? Or is my only solution to make sure the clients manually add a second DNS by themselves? Regards, Florian

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[libvirt-users] Python-libvirt in a virtual environment.
by Sijo Jose 07 Mar '14

07 Mar '14

Hi, Could you guide me to install libvirt in a virtual environment..? OR How python-libvirt could be used within a virtual environment after installing it, in the system. Regards Sijo

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[libvirt-users] how to disable vnet_hdr through libvirt
by Jianfeng Tang 07 Mar '14

07 Mar '14

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? Thanks.

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