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[libvirt-users] (Xen + libvirt) Installing and workin with xen -4.2.1 and libvirt 1.1.2
by cooldharma06 07 Oct '13

07 Oct '13

hi i want to install libvirt-1.1.2 in xen -4.2.1. i installed int he following manner: 1. downloaded source from libvirt/org (libvirt-1.1.2) 2. untarred & run ./configure --with-xen=yes --with-libxl=yes 3. then make and make install. i also enabled the (xend-unix-server yes) in xend config file. i run libvirtd -v and getting the followning error: root@boss[libexec]#libvirtd -v 2013-09-27 07:24:46.501+0000: 29517: info : libvirt version: 1.1.2 2013-09-27 07:24:46.501+0000: 29517: error : libxlCapsInitHost:86 : internal error: Failed to get node physical info from libxenlight 2013-09-27 07:24:46.501+0000: 29517: error : libxlStateInitialize:1362 : cannot create capabilities for libxenlight 2013-09-27 07:24:46.502+0000: 29517: error : virStateInitialize:840 : Initialization of LIBXL state driver failed: internal error: Failed to get node physical info from libxenlight 2013-09-27 07:24:46.502+0000: 29517: error : daemonRunStateInit:909 : Driver state initialization failed If i missed anything in the installation plz correct me. and guide me to solve this error. regards, cooldharma06.

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Re: [libvirt-users] Automatically assign static ipv4 via dhcp to new VMs (Tim)
by Chandana De Silva 07 Oct '13

07 Oct '13

You can do this with the built in dhcp server for the virtual network. The definition is passed to dnsmasq. ... <ip address="192.168.122.1" netmask="255.255.255.0"> <dhcp> <range start="192.168.122.100" end="192.168.122.254" /> <host mac="00:16:3e:e2:ed" name="foo.example.com" ip="192.168.122.10" /> </dhcp> </ip> ... See : http://wiki.libvirt.org/page/VirtualNetworking#XML_format On 05/10/13 20:50, libvirt-users-request(a)redhat.com wrote: > 1. Automatically assign static ipv4 via dhcp to new VMs (Tim) > Subject: [libvirt-users] Automatically assign static ipv4 via dhcp to > new VMs > Message-ID: <524EE851.2010009(a)online-mail.biz> > Content-Type: text/plain; charset=ISO-8859-15 > > Hi guys, > > > What I would like to do: > > 1) Right know it seems like dnsmasq assigns ip-addresses randomly to > VMs, is there any way to assign them in ascending order? > > 2) IPs are not statically assigned. Is it possible to add something like > this automatically at the first VM-start to the xml definition?: > <host mac='AA:BB:CC:DD:EE:FF' ip='192.168.122.2' name='foobar'/> >

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[libvirt-users] network filter and openvswitch bridge
by Pavel Tokarev 07 Oct '13

07 Oct '13

Hello all! I try to use network filters for openvswitch interfaces. This is the xml configuration of my bridge interface <interface type='bridge'> <mac address='00:11:22:33:44:55'/> <source bridge='virbr1'/> <virtualport type='openvswitch'> <parameters interfaceid='0529d6b5-627c-4330-803f-0d7018e6d496'/> </virtualport> <model type='virtio'/> <filterref filter='myfilter'> <parameter name='IP' value='10.10.10.99'/> </filterref> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </interface> The filter 'myfilter' is defined. If I start a domain with this interface all ports are correctly added to the 'virbr1' bridge, plus libvirt creates firewall rules using ebtables tool. BUT ebtables controls linux bridges, not openvswich bridges. As far as I know OVS has its own tool to create firewall rules for its bridges - ovs-ofctl. How to make libvirt to use the right tool for creating firewall rules for OVS bridges? If I remove ebtables tool and try to start the domain, libvirt complains "cannot create rule since ebtables tool is missing." Thank you.

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[libvirt-users] libvirt crash when using libxl (xen 4.3)
by dienet 06 Oct '13

06 Oct '13

Hi I was trying out the libxl backend of xen 4.3 with libvirt, but I found it very unstable and unusable. I'm in xen 4.3 dom0 and starting: 1. xen stuff: echo "Starting Xen..." /etc/init.d/xencommons start #/etc/init.d/xend start . /etc/rc.d/rc.xen_bridge start /etc/init.d/xendomains start #libvirtd -l -d hsflowd 2. Starting libvirt -v to see what is going on. After that I'm using virsh to do some simple tasks: virsh # list Id Name State ---------------------------------------------------- Where is dom0? virsh # create debian_pv.xml error: Failed to create domain from debian_pv.xml error: End of file while reading data: Input/output error error: One or more references were leaked after disconnect from the hypervisor error: Failed to reconnect to the hypervisor And log from libvirt: 2013-10-06 11:24:17.693+0000: 2162: debug : remoteDispatchDomainCreateXMLHelper:3017 : server=0x7fe92c017760 client=0x7fe92c029970 msg=0x7fe92c029520 rerr=0x7fe92511bd50 args=0x7fe90c000af0 ret=0x7fe90c000930 2013-10-06 11:24:17.693+0000: 2162: debug : virDomainCreateXML:1996 : conn=0x7fe904000a80, xmlDesc=<domain type='xen'> <name>debian_pv</name> <uuid>4590a985-69c1-4407-8517-da3da4673d9b</uuid> <memory unit='KiB'>262144</memory> <currentMemory unit='KiB'>262144</currentMemory> <vcpu placement='static' cpuset='1'>1</vcpu> <bootloader>pygrub</bootloader> <os> <type arch='x86_64' machine='xenpv'>linux</type> </os> <clock offset='utc' adjustment='reset'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <disk type='file' device='disk'> <driver name='file'/> <source file='/root/vms/debian_pv/debian_pv.img'/> <target dev='sda' bus='xen'/> </disk> <interface type='bridge'> <mac address='00:16:3e:59:78:01'/> <source bridge='xenbr0'/> </interface> <console type='pty'> <target type='xen' port='0'/> </console> <input type='mouse' bus='xen'/> <graphics type='vnc' autoport='no' listen='0.0.0.0'> <listen type='address' address='0.0.0.0'/> </graphics> </devices> </domain> , flags=0 2013-10-06 11:24:17.693+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe914075300 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe92c012fb0 2013-10-06 11:24:17.694+0000: 2162: debug : virAccessManagerCheckDomain:231 : manager=0x7fe92c012fb0(name=stack) driver=xenlight domain=0x7fe90c009130 perm=2 2013-10-06 11:24:17.694+0000: 2162: debug : virAccessManagerCheckDomain:231 : manager=0x7fe92c017360(name=none) driver=xenlight domain=0x7fe90c009130 perm=2 2013-10-06 11:24:17.694+0000: 2162: debug : virAccessManagerCheckDomain:231 : manager=0x7fe92c012fb0(name=stack) driver=xenlight domain=0x7fe90c009130 perm=4 2013-10-06 11:24:17.694+0000: 2162: debug : virAccessManagerCheckDomain:231 : manager=0x7fe92c017360(name=none) driver=xenlight domain=0x7fe90c009130 perm=4 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe92c012fb0 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectNew:199 : OBJECT_NEW: obj=0x7fe90c002d10 classname=virDomainObj 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectNew:199 : OBJECT_NEW: obj=0x7fe90c005b60 classname=libxlDomainObjPrivate 2013-10-06 11:24:17.694+0000: 2162: debug : virDomainObjNew:2063 : obj=0x7fe90c002d10 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe914075300 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe914075300 2013-10-06 11:24:17.694+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe914075300 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCleanupTimeouts:517 : Cleanup 2 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCleanupHandles:565 : Cleanup 11 2013-10-06 11:24:17.694+0000: 2158: debug : virEventRunDefaultImpl:271 : running default event implementation 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCleanupTimeouts:517 : Cleanup 2 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCleanupHandles:565 : Cleanup 11 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=0 w=1, f=5 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=1 w=2, f=7 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=2 w=3, f=9 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=3 w=4, f=10 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=4 w=5, f=11 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=5 w=6, f=12 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=6 w=7, f=13 e=0 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=7 w=8, f=13 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=8 w=9, f=14 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=9 w=34, f=21 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollMakePollFDs:394 : Prepare n=10 w=36, f=22 e=1 d=0 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCalculateTimeout:332 : Calculate expiry of 2 timers 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCalculateTimeout:340 : Got a timeout scheduled for 1381058662693 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCalculateTimeout:353 : Schedule timeout then=1381058662693 now=1381058657694 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollCalculateTimeout:362 : Timeout at 1381058662693 due in 4999 ms 2013-10-06 11:24:17.694+0000: 2158: debug : virEventPollRunOnce:630 : EVENT_POLL_RUN: nhandles=10 timeout=4999 2013-10-06 11:24:17.707+0000: 2162: debug : virFileClose:90 : Closed fd 28 2013-10-06 11:24:17.726+0000: 2162: error : libxlVmStart:627 : internal error: libxenlight failed to create new domain 'debian_pv' 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe914075300 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectRef:293 : OBJECT_REF: obj=0x7fe90c002d10 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe90c002d10 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe90c002d10 2013-10-06 11:24:17.726+0000: 2162: debug : virObjectUnref:258 : OBJECT_DISPOSE: obj=0x7fe90c002d10 2013-10-06 11:24:17.726+0000: 2162: debug : virDomainObjDispose:2029 : obj=0x7fe90c002d10 2013-10-06 11:24:17.727+0000: 2162: debug : virObjectUnref:256 : OBJECT_UNREF: obj=0x7fe90c005b60 2013-10-06 11:24:17.727+0000: 2162: debug : virObjectUnref:258 : OBJECT_DISPOSE: obj=0x7fe90c005b60 ====== end of log ===== Segmentation fault Why crash? Am I doing something wrong? -- pozdr0 dienet "Old C programmers never die. They're just cast into void."

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[libvirt-users] Bringing up a guest with network disabled
by James Gibbon 05 Oct '13

05 Oct '13

Hello all, I have a KVM guest VM which is a clone of a production machine running on a different physical server, incarnated from an image backup. I want to start up the clone, but obviously it has the same IP address at the moment, and naturally I want to avoid an IP conflict. Normally I'd mount the clone image, go in and change the network config to allocate a different IP, but because it's set up with its whole disk as a LVM that's a bit painful. Is there a simple way I can disable the networking for the guest clone in the config file, so I can VNC into its console and change its IP address config that way? The devices section of the config looks like this: <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='writeback'/> <source file='/var/lib/libvirt/images/sonic2.img'/> <target dev='hda' bus='ide'/> </disk> <interface type='bridge'> <mac address='0A:F7:B6:96:BF:85'/> <source bridge='br0'/> </interface> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target port='0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5937' autoport='no' keymap='en-gb'/> </devices> .. can I change that 'interface type' value to disable its interface? Thanks, James

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[libvirt-users] Changing test_driver.c file
by Arun Viswanath 05 Oct '13

05 Oct '13

Hi All, For some testing purpose I've changed some content in src/test/test_driver.c and then used "make" command to compile and build the code. Then I copied the "libvirt.so.0.9.10.so" file to the target machine and restart the libvirtd daemon, but the changes I made in test_driver.c is nothing reflected. I'm not sure whether I'm missing something. Is it moving only the "libvirt.so.0.9.10.so" is enough or I need to move some .a files ? , but I'm not seeing any ".a" in the kvm host related to libvirt to replace. Please provide me sufficient info to proceed further. Thanks In Advance, Arun V

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[libvirt-users] Xen Project Developer Summit: check the schedule and register!
by Dario Faggioli 05 Oct '13

05 Oct '13

Hi all, The program for the Xen Project Developer Summit 2013 has been announced! Get more details at the links below: xendevelopersummit2013.sched.org/ http://blog.xen.org/index.php/2013/10/02/xen-project-developer-summit-line-… http://events.linuxfoundation.org/events/xen-project-developer-summit Don't miss the opportunity to come and see what's going on in the Xen Project's community. Register and join us in Edinburgh! 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] passthrough shared dir with kvm: need to run as root?
by Raphael Bauduin 03 Oct '13

03 Oct '13

Hi, I need to mount a directory from the host in a guest, with passthough (ie, owner id and group set in the guest should be preserved and written on the host). I've read that for this to work, qemu needs to be run as root. Is there a way to start qemu as root via libvirt? Thanks raph

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[libvirt-users] Snapshots: Where they are stored and how to use them?
by Roland Giesler 03 Oct '13

03 Oct '13

Firstly I'd like to learn where a snapshot is stored once it has been made. I understand that the principle is that when changes occur in the VM, the difference is written to the snapshot, thus recording the differences between the date/time of the snapshot and the current value of the VM. Is that a correct assessment of the process? If that is indeed so, can I take regular snapshots and back then up onto external storage to provide a sort of system restore point at certain times in the past? I have scanned the server hard disks for the snapshot images after running "sudo virsh snapshot-create Windows /etc/libvirt/snapshot.xml" and the system reports a snapshot was taken, yet I cannot find any file that contains the snapshot. $ sudo virsh snapshot-list Windows Name Creation Time State ------------------------------------------------------------ Windows 2013-10-02 12:41:06 +0200 running What will happen to the snapshot if the host server is restarted? Some insight would be greatly appreciated. regards Roland

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[libvirt-users] Bridging Wireless Cards for KVM
by Joshua McKee 03 Oct '13

03 Oct '13

Hi, I hope this is the right place to ask this question. I was wondering if there is a way to set up a KVM VM using an XML document as input into Virsh that uses bridged networking over a wireless card. I understand that wireless cards to not natively support, but I was able to find a working solution here: http://blog.ericwhite.ca/articles/2011/04/creating-a-wireless-bridge/. The issue is, I can use this bridge by calling KVM directly. However, I cannot figure out how to get this same configuration on an XML file that I input into Virsh for the creation of a VM. My understanding is that libvirt calls KVM/QEMU at some point, but I may be mistaken. Thanks, Joshua

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