- Users - libvirt List Archives

[libvirt-users] Hypervisor load much greater than that of the guest
by Damion Parry 26 Nov '13

26 Nov '13

Hello, I've got a situation where I have a couple of vm's running at 300+% cpu on the hypervisor: 9893 qemu 20 0 13.0g 8.2g 4256 S 328.0 4.3 59793:17 qemu-kvm Yet the load within the vm is in the regions of: 1.00, 1.02, 0.98 Everything is reporting OK on both the hypervisor & guest, guest is a qcow2 image on local storage. If anyone could point me in the right direction to start debugging this I'd be grateful. Hypervisor: CentOS release 6.4 (Final) 2.6.32-358.23.2.el6.x86_64 qemu-kvm-0.12.1.2-2.355.0.1.el6_4.9.x86_64 libvirt-0.10.2-18.el6_4.14.x86_64 Guest: CentOS release 6.4 (Final) 2.6.32-358.14.1.el6.x86_64 Thanks in advance, Damion. Fubra is a company limited by shares and registered in England and Wales with number 3967214 at Manor Coach House, Church Hill, Aldershot, Hampshire, GU12 4RQ. We are registered for VAT with number GB733667024, and as a data controller with number Z5193400. We are members of RIPE, Nominet, The Italian RA and registered with OfCom as a provider of electronic communications service.

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[libvirt-users] Help with Vrbr0
by Sherin A 25 Nov '13

25 Nov '13

Hello, I am not able to see vrbr0 in my box. Can some one help me with this ? . I am trying KVM+libvirt and planing to use Routed mode. I hope this virbr0 must be up for using this . I can give an strace too. OS : Debian , kernel 3.12.0 libvrit version : 0.9.8 ____________________________________________________________________ root@:~# ifconfig br0 Link encap:Ethernet HWaddr 4c:72:b9:32:32:86 inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::4e72:b9ff:fe32:3286/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4523 errors:0 dropped:0 overruns:0 frame:0 TX packets:4068 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2286336 (2.2 MB) TX bytes:411238 (411.2 KB) eth0 Link encap:Ethernet HWaddr 4c:72:b9:32:32:86 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:17044 errors:0 dropped:0 overruns:0 frame:0 TX packets:14253 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:12594945 (12.5 MB) TX bytes:1902456 (1.9 MB) Interrupt:20 Memory:f7c00000-f7c20000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:4 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:240 (240.0 B) TX bytes:240 (240.0 B) ------------------------------------------------------------------- root@:~# virsh net-start default error: Failed to start network default error: failed to add iptables rule to enable masquerading root@:~# virsh net-list --all Name State Autostart ----------------------------------------- default inactive yes root@:~# virsh net-start default error: Failed to start network default error: failed to add iptables rule to enable masquerading root@:~# id uid=0(root) gid=0(root) groups=0(root) --------------- -- -------------------------------------- Sherin A

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[libvirt-users] Scientific Linux as guest. Can't install with virt-manager because key "tab" in use
by E Gerlach 23 Nov '13

23 Nov '13

Please help, I can't install Scientific Linux 6.3 with virt-manager because the key tab switches between kvm windows. I urgently need tab to go on in install process. see screenshot: http://aiai.de/foren/scientificLinux_tab.png Even in fullscreen mode tab changes to kvm window and not to button "continue" for installation process. please help, I want to install scientific linux as kvm guest. I'm running debian wheezy as host. thx Eckard

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[libvirt-users] Query:: Reg: Libvirt Networking
by Nehal J Wani 22 Nov '13

22 Nov '13

Currently, I have two networks configured via xml: virsh # net-dumpxml TestNetwork1 <network connections='2'> <name>TestNetwork1</name> <uuid>a76f665a-0196-4edb-81b4-340944a6869c</uuid> <forward dev='p1p1' mode='nat'> <nat> <port start='1024' end='65535'/> </nat> <interface dev='p1p1'/> </forward> <bridge name='virbr0' stp='on' delay='0'/> <mac address='52:54:00:0b:e9:35'/> <ip address='192.168.100.1' netmask='255.255.255.0'> <dhcp> <range start='192.168.100.128' end='192.168.100.254'/> </dhcp> </ip> </network> virsh # net-dumpxml default6 <network connections='1'> <name>default6</name> <uuid>6e57d831-f09e-4b33-950d-6d51c89f9786</uuid> <forward mode='nat'/> <bridge name='virbr3' stp='on' delay='0'/> <mac address='52:54:00:cb:c5:50'/> <ip family='ipv6' address='2001:db8:ca2:2::1' prefix='64'> <dhcp> <range start='2001:db8:ca2:2:1::10' end='2001:db8:ca2:2:1::ff'/> </dhcp> </ip> </network> # brctl show bridge name bridge id STP enabled interfaces virbr0 8000.5254000be935 yes virbr0-nic vnet0 vnet1 virbr3 8000.525400cbc550 yes virbr3-nic vnet2 My queries are: (i) For each interface that I attach to my guests, will a new vnetX (X=0,1,2,3,...) be created? (ii) Can two different active networks share the same bridge? Example, can the xml of two active networks have the same line <bridge name='virbr0' stp='on' delay='0'/> ? (iii) If the answer for (ii) is false, how can I obtain the interface name for a given bridge name in libvirt? -- Nehal J Wani

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[libvirt-users] centos4.8 system container not working on fedora 19 machine
by Rahul Khengare 22 Nov '13

22 Nov '13

Hi All, I am trying to evaluate whether centos-4.8 system container work on Fedora-19 machine or not. Host machine : Fedora 19 Guest (LXC container) : CentOS4 .8 For creation of of container i followed following steps, 1. Installed libvirt packages on fedora19 2. For installation of rootfs using yum, I have created the LOCAL YUM REPO using CentOS-4.8 ISO files 3. Created rootfs using yum 4. Made changes in container xml file required for system container 5 .Define container using container xml file Whenever I start system container it get started successfully but when I am trying to access it using console then It show errors regarding /etc/fstab files and filesystem corruption. I am not able to access the container. Refer below for container xml file and error message, contents of xml file for Centos container, *Centos4_8.xml:* <domain type='lxc'> <name>BasicCentos</name> <memory unit='KiB'>102400</memory> <currentMemory unit='KiB'>102400</currentMemory> <os> <type>exe</type> <init>/sbin/init</init> </os> <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> <filesystem type='mount' accessmode='passthrough'> <source dir='/lxc/centos4.8'/> <target dir='/'/> </filesystem> <interface type='bridge'> <source bridge='br0'/> </interface> <console type='pty' port='0'></console> </devices> </domain> ------------- *ERROR LOG* When trying to access container using CONSOLE command, virsh # console BasicCentos Connected to domain BasicCentos Escape character is ^] INIT: version 2.85 booting /etc/rc.d/rc.sysinit: line 36: [: /sys/fs/selinux: binary operator expected Setting default font (): [ OK ] Welcome to CentOS release 4.8 (Final) Press 'I' to enter interactive startup. hwclock: KDGHWCLK ioctl failed, errno=25: Inappropriate ioctl for device. Cannot access the Hardware Clock via any known method. Use the --debug option to see the details of our search for an access method. Setting clock : Thu Nov 21 01:48:58 EST 2013 [ OK ] Starting udev: MAKEDEV: error making /dev/tty1: Operation not permitted [FAILED] Initializing hardware... storage network audio done [ OK ] raidautorun: unable to autocreate /dev/md0 mount: can't find /dev/pts in /etc/fstab or /etc/mtab Configuring kernel parameters: [ OK ] Setting hostname centos: [ OK ] Checking root filesystem fsck.ext2: Is a directory while trying to open / /: The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> [FAILED] *** An error occurred during the file system check. *** Dropping you to a shell; the system will reboot *** when you leave the shell. *** Warning -- SELinux is active *** Disabling security enforcement for system recovery. *** Run 'setenforce 1' to reenable. /etc/rc.d/rc.sysinit: line 52: $selinuxfs/enforce: ambiguous redirect Press enter for maintenance (or type Control-D to continue): (Repair filesystem) 1 # exit Unmounting file systems mount: can't find / in /etc/fstab or /etc/mtab Automatic reboot in progress. thanks in advance. Regards, Rahul Khengare, NTT OSS Center, Pune, India.

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[libvirt-users] facing some error in launching VM
by cool dharma06 21 Nov '13

21 Nov '13

hi, i am using libvirt-1.1.3 in eucalyptus 2.0.3. When starting the Vm i am facing the following error: i got these error from the nc.log: [EUCAERROR ] ERROR: key injection / tune2fs command failed [EUCAERROR ] libvirt: internal error: client socket is closed (code=1) [EUCAFATAL ] hypervisor failed to start domain i checked in libvirtd.log its not showing any error. How to solve this error.? Any suggestions.?? regards, cooldharma06.

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[libvirt-users] how to install libvirt-python
by Mahmood Naderan 21 Nov '13

21 Nov '13

Hi, I have successfully installed libvirt-.0.10.0 from source ./configure make make install How can I check that if libvirt-python is installed? Search the folders, it seems there is no such file [root@tiger ~]# find /usr/ -name libvirt-python [root@tiger ~]# find . -name libvirt-python [root@tiger ~]# Regards, Mahmood

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[libvirt-users] how to use virtio-blk-data-plane in libvirt
by Hui Kai Ran 21 Nov '13

21 Nov '13

Hi, I learned that there is a new technology - virtio-blk-data-plane introduced in qemu to bring a leap in IO performance to KVM. Has this feature been supported in libvirt? if it's, how to configure xml to support this feature? thanks.

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[libvirt-users] libvirt-sandbox on Ubuntu with SELinux
by boden 21 Nov '13

21 Nov '13

I'm attempting to build/use libvirt-sandbox on Ubuntu 12.xx. Although I'm still working through dependency issues (including the need for libvirt >= 1.0.2 which is not packaged for ubuntu 12.xx) to build the sandbox code, I have a forward looking question. It appears libvirt-bin for Ubuntu likes apparmor as does most Ubuntu based packages using a LSM impl. However, as I understand libvirt-sandbox is integrated with SELinux to provide security isolation of containers... My question becomes -- *should* libvirt-sandbox work on Ubuntu assuming I use the ubuntu libvirt-bin package and replace apparmor with selinux? Or am I flat out walking into quicksand on Ubuntu here? Without the security aspect of libvirt-sandbox, I wonder if its viable on ubuntu for those looking to mitigate container security? Thanks

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[libvirt-users] Error facing when starting the VM.
by cool dharma06 21 Nov '13

21 Nov '13

Hi, i am using eucalyptus -2.0.3 and libvirt 1.1.3 for xen -4.2.1. i found this error when starting the Vm via euca2ools(euca-run-instances) the error details are as follows: *libvirt: internal error: client socket is closed (code=1) * *hypervisor failed to start domain* But from virsh i checked everything is working fine. I dont know why the socket is getting closed when accessing from eucalyptus. GIve some suggestions to solve this error. Regards, cooldharma06.

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