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[libvirt-users] Strange results with QoS definition
by Patrick Herzfeld 27 Sep '13

27 Sep '13

Hi I'm currenty testing network QoS implementations stumbled upon quite strange results when using QoS definitions inside the virtdomain xml. I'm testing bandwidth from a virtdomain towards a hardware server connected to the same switch, both connected to gigabit ports. Iperf tells me the bandwidth is around 939 Mbit/s. I added this to my virtdomains xml: <bandwidth> <inbound average='1280'/> <outbound average='1280'/> </bandwidth> This should limit the bandwidth to around 10 megabit/s 1280 kilobytes/s, however i get only around 5.14 Mbits/sec... Has anyone an idea what causes this difference? I already checked the applied qdisc & class: root@testvirt-patrick:~ # tc qdisc sh dev vnet1 qdisc htb 1: root refcnt 2 r2q 10 default 1 direct_packets_stat 0 qdisc ingress ffff: parent ffff:fff1 ---------------- root@testvirt-patrick:~ # tc class sh dev vnet1 class htb 1:1 root prio 0 rate 10240Kbit ceil 10240Kbit burst 1598b cburst 1598b Freundliche Grüsse / kind regards Patrick Herzfeld -- Nine Internet Solutions AG, Albisriederstrasse 243a, CH-8047 Zuerich Tel +41 44 637 40 00 | Support +41 44 637 40 40 | Fax +41 44 637 40 01

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[libvirt-users] virtio channel socket bind error
by Chunduru Venkata, Ravi 27 Sep '13

27 Sep '13

Hi All, My intent is to make virtio unix channel work. I could configure the XML and launch VM and could see the port in /dev/virtio-ports <channel type='unix'> <source mode='bind' path='/tmp/appl_port'/> <target type='virtio' name='appl_port'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> When I see on the host, the unix socket is already binded and is in listening state. echo "test this" > /tmp/appl_port bash: /tmp/appl_port: No such device or address netstat -nax | grep appl_port unix 2 [ ACC ] STREAM LISTENING 15302258 /tmp/appl_port 1) Can some one please have a look and help me fix this. 2) if I don't set source mode to 'bind', it gets set to 'connect' in xml and VM fails to boot up. I would like to understand the different types of source mode. Dmesg shows below denied message for connect mode. 84616.025345] type=1400 audit(1380129082.835:210): apparmor="DENIED" operation="capable" parent=1 profile="/usr/sbin/libvirtd" pid=9804 comm="libvirtd" pid=9804 comm="libvirtd" capability=29 capname="audit_write" Thanks, -Ravi.

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[libvirt-users] connecting with the libvirt daemon on xen+debian
by Aamir A R 27 Sep '13

27 Sep '13

Hi all:Me being new to libvirt, this may sound very trivial to you. Any help is welcome. I have deb7u1, with xen4.1.4 and libvirt 0.9.12 (since those are the latest available thru apt utility) . I have enabled xen-unix-server as well as xen-http-server in the /etc/xen/xend-config.sxp file. But I still keep getting the following message. >From local: root@debian:~# virsh -c xen:///error: unable to connect to 'localhost:8000': Connection refusederror: failed to connect to the hypervisorroot@debian:~# >From remote: [root@CentOS-6 libvirt]# virsh -c xen+ssh://root@10.240.64.112/root@10.240.64.112's password: error: unable to connect to 'localhost:8000': Connection refusederror: failed to connect to the hypervisor[root@CentOS-6 libvirt]#

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[libvirt-users] Is it possible to attach a harddisk to an ESX node
by varun bhatnagar 27 Sep '13

27 Sep '13

Hi, Is it possible to attach a harddisk to an ESX node later after creating/defining it? If yes, can anyone tell me how to do it? Regards, Varun

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[libvirt-users] how to boot the lxc container with a default ip
by lei yang 27 Sep '13

27 Sep '13

Hi expert my xml is <domain type='lxc'> <name>vm1</name> <memory>500000</memory> <os> <type>exe</type> <init>/bin/sh</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <interface type='network'> <source network='default'/> </interface> <console type='pty' /> </devices> </domain> I want start the guest with a ip=192.168.122.22 how could I modify the xml ? Lei

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[libvirt-users] virDomainGetInfo() returns wrong domain state
by Panday Ritesh Sharma (rpanday) 26 Sep '13

26 Sep '13

Hi Team, I have written below code to get the VM state at run time. I found, though the VM is in shut-off state, when I use the function virDomainGetInfo(); I get state as running. Could you please let me know what wrong I am doing. To know the actual VM state I used 'virsh list' and it clearly shows the VM is in shut-off state. Please find the log and code snippet below. Log from virsh: ================= [host:~]$ virsh list --all Id Name State ---------------------------------------------------- 1 calvados running 2 LCXR running 3 default-sdr--1 running - test--2 shut off Out put: ========= 04.03.06.698923264:INFO: vm_libvirt_state_to_vmm_state: state returned is 1 Note : Here 1 is actually running. Code snippet: =============== enum cidl_vmm_vm_state vm_libvirt_state_to_vmm_state(unsigned char libvirt_state) { enum cidl_vmm_vm_state state; INFO("%s: state returned is %u\n",__FUNCTION__, libvirt_state); <<<<<<<<<<<<<<<<<< if (libvirt_state == VIR_DOMAIN_RUNNING) { state = cidl_vm_state_running; } else if ((libvirt_state == VIR_DOMAIN_PAUSED) || (libvirt_state == VIR_DOMAIN_BLOCKED)) { state = cidl_vm_state_paused; } else if (libvirt_state == VIR_DOMAIN_SHUTOFF) { state = cidl_vm_state_defined; } else { state = cidl_vm_state_not_defined; } return state; } virDomainInfo res_util; virDomainPtr dom = virDomainLookupByName(virt, private_names[vm_idx]); res = virDomainGetInfo(dom, &res_util); vminfo[vm_idx].vm_state = vm_libvirt_state_to_vmm_state(res_util.state); Regards Ritesh Sharma

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[libvirt-users] SR-IOV Pool Availability
by Brian Rak 26 Sep '13

26 Sep '13

If I'm using the SR-IOV Pool assignment method (from http://wiki.libvirt.org/page/Networking#Assignment_from_a_pool_of_SRIOV_VFs… ), how would I check how many virtual functions are already in use? Is there a method other then looping through all the active guests and determining if they're using the SR-IOV interface?

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[libvirt-users] Migrate hangs at 99%
by Gergely Horváth 26 Sep '13

26 Sep '13

Hello guys! We have a lot of virtual machines and I recently tried out the migrate feature of libvirt. It works like a charm, even without shared storage, but when we try to migrate a VM under a little pressure (a HTTP server gets some 1-5 requests/sec) the migration process hangs at 99%. After we stop the stressing of the VM, the migration immediately finishes. I'm using the following command to migrate: virsh migrate --live --persistent --undefinesource --copy-storage-all --verbose --desturi qemu+ssh://root@DESTINATION/system VM-NAME Do you have any advice on this? Üdvözlettel / Best regards Gergely Horváth | gergely.horvath(a)inepex.com http://inepex.com | IT Development and Location Based Services http://inetrack.com | The customizable fleet tracking platform

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Re: [libvirt-users] [Xen-devel] Error i am getting when using libvirt in xen 4.2
by Dario Faggioli 26 Sep '13

26 Sep '13

[This looks a lot like an user (rather than developer) question, so I'm moving the conversation to the appropriate users' lists, with xen-devel in Bcc for this message] On mer, 2013-09-25 at 10:43 +0530, cooldharma06 wrote: > hi, > > > i am using xen-4.2. i am trying to create the virual machine with > libvirt (virsh). > What distribution? What version of libvirt? Is that with the distro packaged version of libvirt and Xen, or you built them yourself? Oh, although it's probably unrelated, HVM or PV VM? > if i use the xen-xm means its working fine. > Mmm... Does that mean you have xend running? > i am getting the following error: > > > error: Failed to reconnect to the hypervisor > error: no valid connection > error: unable to connect to 'localhost:8000': Connection refused > That's what you see in the terminal output, right? What about logs? What's in /var/log/libvirt/ and /var/log/libvirt/libxl ? > Give me some idea to make the xen(xl) to work with libvirt. > Sure we can try, if you give us some more info! :-P Regards, Dario -- <<This happens because I choose it to happen!>> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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[libvirt-users] Collecting system stats
by Sam Giraffe 26 Sep '13

26 Sep '13

Hi, I am trying to create a report across all my KVM hypervisors using libvirt API and I need some assistance in figuring out the right API calls. My report will contain the total available memory, CPU, disk across all hypervisors, versus the amount used by the virtual machines. This report will help figure out if we are running low on hypervisor disk, CPU or memory and if we need to add more. I can't find the libvirt API call to get system info, such as total memory in the system, free memory, total disk space, available disk space, etc. There is virDomainInfo which shows memory total and free about a particular VM, I guess I can use active/inactive domain list and then use virDomainInfo on each of the VM's, but that does not give me hypervisor stats. I am wondering if I will have to enable SNMP and use that to get hypervisors stats. I am creating this report remotely on a reporting machine which will connect to each hypervisor using the libvirt API using one of the remote libvirt connections available. Thanks

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