November 2013 - Users - libvirt List Archives

[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

2 3

[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.

1 0

[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.

2 1

[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

2 8

[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.

2 1

[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

2 1

[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.

1 0

[libvirt-users] Unable to configure libvirt
by Mahmood Naderan 20 Nov '13

20 Nov '13

Hello, When I want to install libvirt-0.10.0 from source, I get this error at the configure stage checking for libdevmapper.h... no configure: error: You must install device-mapper-devel/libdevmapper >= 1.0.0 to compile libvirt However the package is installed on my system # yum list device-mapper-libs.x86_64 Installed Packages device-mapper-libs.x86_64 1.02.74-10.el6 @base/$releasever What is the problem then? Regards, Mahmood

2 2

[libvirt-users] Failed to access the console after starting the lxc container
by Aarti Sawant 20 Nov '13

20 Nov '13

Hello, I am starting the system container without "/" directory So that it can share the host /bin /sbin /lib and /lib64 and i have sepeartely mounted /var, /etc and /usr directory for the container Below is xml file <domain type='lxc'> <name>test6</name> <memory>102400</memory> <os> <type>exe</type> <init>/sbin/init</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <console type='pty'/> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/lxc/test6/etc'/> <target dir='/etc'/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/lxc/test6/var'/> <target dir='/var'/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/lxc/test6/usr'/> <target dir='/usr'/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/pg_data/'/> <target dir='/pg_data'/> </filesystem> <filesystem type='ram' accessmode='passthrough'> <source usage='0' units='KiB'/> <target dir='/dev/shm'/> </filesystem> <interface type='bridge'> <source bridge='br0' /> </interface> </devices> </domain> when i start the container it get start , but when i try to access console it get stuck virsh # list Id Name State ---------------------------------------------------- 18238 test4 running 20435 test6 running virsh # virsh # start test6 Domain test6 started virsh # console test6 Connected to domain test6 Escape character is ^] But when i mount the "/" in xml it works, i have also share host /bin,/sbin, /lib and /lib64. <domain type='lxc'> <name>test4</name> <memory>102400</memory> <os> <type>exe</type> <init>/sbin/init</init> </os> <vcpu>1</vcpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <console type='pty'/> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/lxc/test4/'/> <target dir='/'/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/bin'/> <target dir='/bin'/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/sbin'/> <target dir='/sbin'/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/lib'/> <target dir='/lib'/> </filesystem> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/lib64'/> <target dir='/lib64'/> </filesystem> <filesystem type='mount' accessmode='passthrough'> <source dir='/pg_data/'/> <target dir='/pg_data'/> </filesystem> <filesystem type='ram' accessmode='passthrough'> <source usage='0' units='KiB'/> <target dir='/dev/shm'/> </filesystem> <interface type='bridge'> <source bridge='br0' /> </interface> </devices> </domain> as i am new , can anyone explain me why my test6 container get stuck? And in system container if we need to share host filesystem y we need to mount them explicitly? Thanks, Aarti Sawant NTTDATA OSS Center Pune

2 1

[libvirt-users] virsh and multi source-dev
by Matthieu Simonin 20 Nov '13

20 Nov '13

Hi, I'm using LVM based storage pools and I'm wondering if there is a way to specify several source-dev on the command line for creating a volume group spread over several devices : one device /dev/sdc1 is ok: * virsh pool-define-as --name lvmpool --type logical --source-dev /dev/sdc1 --source-name vg --target /dev/vg I would like something like (but sadly doesn't work): ? virsh pool-define-as --name lvmpool --type logical --source-dev /dev/sdc1 --source-dev /dev/sdb1 --source-name vg --target /dev/vg ? Best regards, Matt

3 4