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[libvirt-users] libvirt and Bridging
by Face 20 Aug '10

20 Aug '10

Hello all, Basically my problem is how can i access a virtual machine from local network. I am able to do so from the host PC put not from other PC's on the same network. here is my what i did so far (http://wiki.libvirt.org/page/Networking#NAT_forwarding_.28aka_.22virtual_ne…) cat '/etc/libvirt/qemu/networks/default.xml' <network> <name>default</name> <uuid>1bad08f7-0bc3-bfde-f87d-f323ab1c95eb</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on' delay='0' /> <ip address='10.0.2.1' netmask='255.255.255.240'> <dhcp> <range start='10.0.2.2' end='10.0.2.14' /> </dhcp> </ip> </network> cat '/etc/sysctl.conf' # Disable packet forwarding #net.ipv4.ip_forward=0 net.ipv4.ip_forward=1 # disable netfilter on the bridge: net.bridge.bridge-nf-call-ip6tables = 0 net.bridge.bridge-nf-call-iptables = 0 net.bridge.bridge-nf-call-arptables = 0 ifconfig -a br0 Link encap:Ethernet HWaddr 00:1C:C0:38:AF:BA inet addr:10.0.1.5 Bcast:10.0.1.15 Mask:255.255.255.240 inet6 addr: fe80::21c:c0ff:fe38:afba/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:580 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:29435 (28.7 Kb) TX bytes:468 (468.0 b) eth0 Link encap:Ethernet HWaddr 00:C0:DF:13:AF:87 inet addr:10.0.1.4 Bcast:10.0.1.15 Mask:255.255.255.240 inet6 addr: fe80::2c0:dfff:fe13:af87/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:476362 errors:0 dropped:0 overruns:0 frame:0 TX packets:684752 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:57147388 (54.4 Mb) TX bytes:707797829 (675.0 Mb) Interrupt:22 Base address:0x800 eth1 Link encap:Ethernet HWaddr 00:1C:C0:38:AF:BA inet6 addr: fe80::21c:c0ff:fe38:afba/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1142 errors:0 dropped:0 overruns:0 frame:0 TX packets:43 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:90530 (88.4 Kb) TX bytes:2632 (2.5 Kb) Memory:e3200000-e3220000 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:16436 Metric:1 RX packets:118356 errors:0 dropped:0 overruns:0 frame:0 TX packets:118356 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:14239239 (13.5 Mb) TX bytes:14239239 (13.5 Mb) virbr0 Link encap:Ethernet HWaddr FE:54:00:45:A7:31 inet addr:10.0.2.1 Bcast:10.0.2.15 Mask:255.255.255.240 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:180 errors:0 dropped:0 overruns:0 frame:0 TX packets:128 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:16657 (16.2 Kb) TX bytes:50599 (49.4 Kb) vnet0 Link encap:Ethernet HWaddr FE:54:00:45:A7:31 inet6 addr: fe80::fc54:ff:fe45:a731/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:14 errors:0 dropped:0 overruns:0 frame:0 TX packets:357 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:1404 (1.3 Kb) TX bytes:19248 (18.7 Kb) brctl show bridge name bridge id STP enabled interfaces br0 8000.001cc038afba no eth1 virbr0 8000.fe540045a731 yes vnet0 route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.1.0 0.0.0.0 255.255.255.240 U 0 0 0 eth0 10.0.1.0 0.0.0.0 255.255.255.240 U 0 0 0 br0 10.0.2.0 0.0.0.0 255.255.255.240 U 0 0 0 virbr0 0.0.0.0 10.0.1.1 0.0.0.0 UG 0 0 0 eth0 iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT udp -- anywhere anywhere udp dpt:domain ACCEPT tcp -- anywhere anywhere tcp dpt:domain ACCEPT udp -- anywhere anywhere udp dpt:bootps ACCEPT tcp -- anywhere anywhere tcp dpt:bootps Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere 10.0.2.0/28 state RELATED,ESTABLISHED ACCEPT all -- 10.0.2.0/28 anywhere ACCEPT all -- anywhere anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable REJECT all -- anywhere anywhere reject-with icmp-port-unreachable ACCEPT all -- anywhere anywhere PHYSDEV match --physdev-is-bridged ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere 10.0.2.5 tcp dpt:smakynet ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere 10.0.2.5 tcp dpt:smakynet ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere 10.0.2.5 tcp dpt:smakynet Chain OUTPUT (policy ACCEPT) target prot opt source destination the IP Address for the virtual machine i am trying to access is 10.0.2.5 (vnet0). I am able only to access it from the host PC only, therefore, how i can i access it from other PC's on the network ? Any help would be much appreciated. -- Sincerely,

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[libvirt-users] how to load different bios into qemu
by Martin Kraus 17 Aug '10

17 Aug '10

Hello. I'm using debian squeeze with libvirt and kvm and I need to load a newer version of seabios into qemu. I'd like to do it without overwriting seabios in the debian package because that might be overwritten on the next update. I hopend that the <loader> directive in the config would work but it doesn't. thanks for any ideas. mk

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[libvirt-users] building libvirt-0.8.3 for windows ( with dlls )
by Gal Gafni 16 Aug '10

16 Aug '10

Hi, I'm trying to compile the latest libvirt (0.8.3 ) on windows and the configure fails to find XDR lib. I installed the xdr-4.0-mingw2 and configure complains the XDR library doesn't exist. Should I get another XDR lib? The command I run: $ ./configure --with-esx --without-sasl --without-avahi --without-polkit --without-python --without-xen --without-qemu --without-lxc --without-o penvz --without-libvirtd the last 10 lines of configure: checking for mntent.h... no checking net/ethernet.h usability... no checking net/ethernet.h presence... no checking for net/ethernet.h... no checking linux/magic.h usability... no checking linux/magic.h presence... no checking for linux/magic.h... no checking for xdrmem_create in -lportablexdr... no checking for library containing xdrmem_create... no configure: error: Cannot find a XDR library is there a a guide somewhere in the list for compiling the windows version on mingw? Thanks, Gal Gafni Chen CSL-WAVE Developer

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[libvirt-users] F13-x86_64 - New version of qemu in raw virt repo breaks virsh and virt-manager?
by Mike Hinz 16 Aug '10

16 Aug '10

Without actually thoroughly thinking about it, I updated my system yesterday with the latest qemu-kvm. rpm -qa shows qemu-kvm-0.13.0-0.5.20100809git25fdf4a.fc13.x86_64 See also: virsh # version Compiled against library: libvir 0.8.2 Using library: libvir 0.8.2 Using API: QEMU 0.8.2 Running hypervisor: QEMU 0.13.50 Now when I attempt to start a domain that was working perfectly well prior to this update, I get the following: virsh # start winxp1 error: Failed to start domain winxp1 error: internal error Process exited while reading console log output: Supported machines are: pc Standard PC (alias of pc-0.13) pc-0.13 Standard PC (default) pc-0.12 Standard PC pc-0.11 Standard PC, qemu 0.11 pc-0.10 Standard PC, qemu 0.10 isapc ISA-only PC Virt-Manager throws the same error when attempt to start an existing domain. I'm assuming that there's now some sort of compatibility issue between the current versions of libvirt/virt-manager and qemu-kvm? Is there a way to get around this and somehow use my existing domains with this updated version of qemu-kvm? Interestingly, just out of curiosity, I've started a new installation of a WinXP vm. This seems to be going perfectly well so far, so I assume that the issue is only with domains previously created with the older version of qemu?? Any assistance in being able to run my existing domains would be greatly appreciated! -- Regards, Mike Hinz President YR20 1718 Fry Road Suite 440 Houston, TX 77084 mike.hinz(a)yr20.com 832-225-1293 (o) 713-594-3095 (m) 832-550-2657 (f)

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[libvirt-users] cpuTimes and qemu-kvm on F13
by Matthew Farrellee 15 Aug '10

15 Aug '10

http://libvirt.org/html/libvirt-libvirt.html#virDomainInfo http://libvirt.org/html/libvirt-libvirt.html#virVcpuInfo Both virDomainInfo and virVcpuInfo have a nanosecond cpuTime field. How do the two related to one another? With some experiementing, it appears the virDomainInfo::cpuTime is equal to the host CPU time used by the qemu-kvm process for the domain. It also appears that the sum(virVcpuInfo::cpuTime) for a domain is not equal to the virDomainInfo::cpuTime. Is the virVcpuInfo::cpuTime how much host CPU time was spent simulating the vCPU? Making the difference between the sum and the virDomainInfo::cpuTime the overhead of qemu-kvm? Does the relationship hold for other hypervisors? Best, matt

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[libvirt-users] virtio and encryption
by Mike Ponomarenko 13 Aug '10

13 Aug '10

Greetings, I am trying to use virtio and encryption. My setup is: host and guest: ubuntu 10.04 server (libvirt 0.7.5-5ubuntu27, qemu-kvm 0.12.3+noroms-0ubuntu9.2) I have secret defined and disk in domain xml referencing that secret. When I start using "<target dev='hda' bus='ide'/>" in HDD config, it works. When I start using "<target dev='vda' bus='virtio'/>" I get following in syslog: qemuMonitorCommandWithHandler:240 : cannot send monitor command 'cont': Unknown error 8446744073709551594 running with "<target dev='vda' bus='virtio'/>" works fine if format is raw and there is no encryption. Is storing raw images on encrypted loop device the only way to have both virtio and ecryption?

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[libvirt-users] how to make consisten backups of guests without stopping them?
by Martin Kraus 12 Aug '10

12 Aug '10

Hello. I'd like to backup kvm guests running from lvm partitions on the host without as little downtime as possible, preferably without stopping them. Could libvirt help me with this? Could anybody point me to some documentation? The question is what happens to the filesystem if I snapshot it from the host. LVM is supposed to tell the filesystem to make itself consistent but I don't know how that works if the filesystem is mounted inside the guest. thanks mk

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[libvirt-users] RHEL 6 does not support bonded and vlan tagged interfaces for KVM guests?
by David Knierim 12 Aug '10

12 Aug '10

I just wrote a bugzilla report against RHEL 6 beta2 (https://bugzilla.redhat.com/show_bug.cgi?id=623199) In it I documented that I cannot get my guests to be able to use our standard network configuration, which is active-standby bonded interface with tagged vlans. The response I got was this: RHEL Product and Program Management 2010-08-11 11:39:02 EDT This issue has been proposed when we are only considering blocker issues in the current Red Hat Enterprise Linux release. ** If you would still like this issue considered for the current release, ask your support representative to file as a blocker on your behalf. Otherwise ask that it be considered for the next Red Hat Enterprise Linux release. ** While I am working with Red Hat to get this included in the official release of RHEL 6, I was hoping that I could get this working somehow. It appears to me that the problem is in the libvert-controlled network connection to the guest. Can someone give me a clue on how to get this working? Thanks, David

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[libvirt-users] libvirt 0.8.3 cannot connect to remote libvirtd 0.6.3
by Haidong Zhu 11 Aug '10

11 Aug '10

It seems virsh 0.8.3 cannot connect to libvirtd 0.6.3. Machine 1: iibvirtd is 0.6.3 Machine 2: virsh 0.6.1 virsh -c xen+ssh://root@192.168.1.78 list Connecting to uri: qemu:///session Id Name State ---------------------------------- 0 Domain-0 running 1 shanxi idle Machine 3: virsh 0.8.3 virsh -c xen+ssh://root@192.168.1.78 list error: server closed connection: error: failed to connect to the hypervisor

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[libvirt-users] TCP reset (RST) networking issue (maybe was 'Sporadic network issues")
by Brian Fallik 11 Aug '10

11 Aug '10

Hi, I'm seeing a very similar problem to the thread "Sporadic networking issues" [1]. In our setup, some TCP operations receive unexpected RST packets when executed on the guest. I can see these RST packets via wireshark but can't explain their source. We originally uncovered this when some 'git clone' operations failed with "Broken Pipe" in the guests. I've been able to reproduce the same failures using scp and 'svn checkout'. The failure occurs 80-90% of the time and 'svn checkout' seems to be the quickest to fail. The same operations on the host are always successful. My setup is a Lucid amd64 host with two guests (Lucid and Hardy, both i386, using kvm). Networking is configured as described in "Routed network config". One anomoly I notice is that our configuration is missing the 'mode' and 'dev' attributes of the 'forward' node. Not sure if that makes a difference, especially since networking seems to mostly work. I've tried this with both virtio and e1000 drivers with no difference. I tried Jeremy's suggestion to limit the host to start a single guest but that did not seem to have an impact. One thing I wonder is if I'm resetting the libvirt correctly to make this change. I did not reboot the host, but I did shutdown the guests, shutdown the default network, verified that no kvm was running and no tap/bridge devices existed, undefined the Hardy domain, then restarted the default network and started the Lucid kvm. Does that sound correct? Anyone have suggestions for further debugging or pointer(s) to existing related bugs? My search didn't turn up anything obvious. I'm very eager to resolve this issue since it's blocking our ability to use the VMs. Thanks, brian 1 - https://www.redhat.com/archives/libvirt-users/2010-August/msg00012.html

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[libvirt-users] renaming a domain?
by Igor Serebryany 10 Aug '10

10 Aug '10

Hi, I'm trying to figure out if libvirt supports a domain rename feature, like xen's "xm rename" command. I couldn't find anything in the docs suggesting such a function. Am I missing something? Thanks! --Igor

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[libvirt-users] Sporadic network issues
by jeremy avnet 10 Aug '10

10 Aug '10

I'm seeing this problem with both the virtio and e1000 driver with both linux and windows guests. About 5 - 10% of the VMs I launch have network problems. They seem to always get an IP from the DHCP server (dnsmasq), but afterwards either they can not make an outside network connection or they lose connectivity at a later time. Sometimes the connectivity comes back, sometimes it doesn't. It's very sporadic and there doesn't seem to be any rhyme or reason to it. The network is configured like "Routed network config" described here: http://libvirt.org/formatnetwork.html#examplesRoute The host machines are on Ubuntu 10.04. We were using the default Lucid packages (libvirt 0.7.5 / qemu 0.12.3), but I have upgraded us to libvirt 0.8.1 and qemu 0.12.4. I believe this has helped reduce the failure rate, but it still persists. Has anyone else had this problem or is there some suggestions for things to look into? Thank you. .:. jeremy

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[libvirt-users] 0.8.3 make error
by Haidong Zhu 10 Aug '10

10 Aug '10

OS: Ubuntu 9.04 Error output: CC libvirt_parthelper-parthelper.o CCLD libvirt_parthelper libvirt_parthelper-parthelper.o: In function `main': /home/yoyoadm/libvirt-0.8.3/src/storage/parthelper.c:105: undefined reference to `ped_device_get' /home/yoyoadm/libvirt-0.8.3/src/storage/parthelper.c:119: undefined reference to `ped_disk_new' /home/yoyoadm/libvirt-0.8.3/src/storage/parthelper.c:125: undefined reference to `ped_disk_next_partition' collect2: ld returned 1 exit status make[3]: *** [libvirt_parthelper] Error 1 make[3]: Leaving directory `/home/yoyoadm/libvirt-0.8.3/src' make[2]: *** [all] Error 2 make[2]: Leaving directory `/home/yoyoadm/libvirt-0.8.3/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/yoyoadm/libvirt-0.8.3' make: *** [all] Error 2

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[libvirt-users] howto setup linux guest with 2 nics
by Jan Paulini 06 Aug '10

06 Aug '10

hi, i have the following situation. my host system is running debian lenny and kvm. i have 2 ethernet interfaces of which i like to use eth0 for administration of the server itself without traffic from any guest systems. eth1 is connected to a different switch where i have numerous vlans. i have successfully setup a guest running virt-install using a bridge interface on the host system. here the debian config for br1 which i used: auto eth1.700 iface eth1.700 inet manual auto br1 iface br1 inet manual bridge_ports eth1.700 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off i was now looking into the xml file for the guest hoping to find a way to use 2 ethernet interfaces for the guest one on br1 and another on br2 where br2 would be configures as br1 above on the host, just in a different vlan. how can i do that ? the network section of the xml fine lookes like this: <interface type='bridge'> <mac address='54:52:00:xx:xx:xx'/> <source bridge='br1'/> <model type='virtio'/> </interface> is there possibly a way of installing a guest with virt-install to give the guest eth0 and eth1 which are in different vlans on the hosts eth1 ? thanks for your help ! Jan

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[libvirt-users] How to force the use of virtio as the guest network driver
by Tony Lewis 06 Aug '10

06 Aug '10

I'm running KVM on a standard Debian Lenny host, and I seem to be hitting the problem identified here: http://serverfault.com/questions/123566/is-anyone-using-kvm-in-production My symptom is that using rsync over SSH to transfer files into the guest gets slower and slower, and then grinds to a halt, and the machine becomes unreachable. It seems that I should be using the virtio driver, but I can't seem to make it load. The KVM guest has the virtio module, (a la find /lib/modules -name \*virtio\*) but when I try to force it by setting <model type="virtio"/> in the XML configuration, it seems to make no difference. I see that as per http://libvirt.org/formatdomain.html , "qemu -net nic,model=? /dev/null" returns the following: "ne2k_isa i82551 i82557b i82559er ne2k_pci pcnet rtl8139", but I have no qemu-kvm binary. Not sure if that's a telling symptom or not. Host kernel is 2.6.26-2-openvz-amd64, KVM version is 72+dfsg-5~lenny5, libvirt version is 0.4.6-10, all of which look good enough to use virtio according to http://wiki.libvirt.org/page/Virtio . Thanks, Tony Lewis

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[libvirt-users] performance with libvirt and kvm
by Nirmal Guhan 04 Aug '10

04 Aug '10

Hi, I am seeing a performance degradation while using libvirt to start my vm (kvm). vm is fedora 12 and host is also fedora 12, both with 2.6.32.10-90.fc12.i686. Here are the statistics from iperf : >From VM: [ 3] 0.0-30.0 sec 199 MBytes 55.7 Mbits/sec >From host : [ 3] 0.0-30.0 sec 331 MBytes 92.6 Mbits/sec libvirt command as seen from ps output : /usr/bin/qemu-kvm -S -M pc-0.11 -enable-kvm -m 512 -smp 1 -name f12kvm1 -uuid 9300bfe2-2b9c-d9f0-3b03-9c7fe9934393 -monitor unix:/var/lib/libvirt/qemu/f12kvm1.monitor,server,nowait -boot c -drive file=/var/lib/libvirt/f12.img,if=ide,bus=0,unit=0,boot=on,format=raw -drive if=ide,media=cdrom,bus=1,unit=0,format=raw -net nic,macaddr=52:54:00:51:7c:39,vlan=0,model=virtio,name=net0 -net tap,fd=21,vlan=0,name=hostnet0 -serial pty -parallel none -usb -vnc 127.0.0.1:0 -k en-us -vga cirrus -balloon virtio If I start a similar vm using qemu-kvm directly, the performance matches with the host. qemu kvm : [ 3] 0.0-30.0 sec 329 MBytes 91.9 Mbits/sec TCP window size is 64K for all the cases. Command used : qemu-kvm vdisk.img -m 512 -net nic,model=virtio macaddr=$macaddress -net tap,script=/etc/qemu-ifup Any clues? Thanks, Nirmal

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[libvirt-users] libvirt and lxc
by Nirmal Guhan 04 Aug '10

04 Aug '10

Is anyone using libvirt for lxc ? I am trying to do so and running into an issue. The system container starts fine with lxc tools and am able to connect to it. Here is the snippet of my xml file (rest is same as in http://libvirt.org/drvlxc.html) <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount'> <source dir='/lxc/f12'/> <target dir='/'/> </filesystem> <interface type='bridge'> <mac address='52:54:00:82:87:64'/> <source bridge='br0'/> <target dev='tap0'/> </interface> <console type='pty'> <target port='0'/> </console> </devices> Am able to start the container but when I do console : virsh # console f12lxc Connected to domain f12lxc Escape character is ^] <<hangs here and I press enter, it destroys the domain>> virsh # Am running Fedora 12 with 2.6.32.10-90.fc12.i686. I changed target dev='tap0' to 'veth' and no change in the behavior. Please help. Thanks, Nirmal

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[libvirt-users] virDomainSetSchedulerParameters() does not support KVM?
by Zhang Qian 30 Jul '10

30 Jul '10

Hi, I have one RHEL 5.5 Xen box and one RHEL 5.5 KVM box. In the Xen box, the following command works well: $ virsh schedinfo RHELu3T Scheduler : credit weight : 256 cap : 0 But in KVM box, it can not work: $ virsh schedinfo RHEL5u3 Scheduler : Unknown error: this function is not supported by the hypervisor: virDomainGetSchedulerType Is it because that the libvirt APIs virDomainGetSchedulerParameters() and virDomainSetSchedulerParameters() does not support KVM? Is there any plan for libvirt to support that? Or any equivalent in libvirt can be used to do the same thing for KVM？ Thanks! Qian

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[libvirt-users] Too many active clients?
by jeremy avnet 29 Jul '10

29 Jul '10

Hello, I'm receiving a lot of these since a couple of days ago: libvirtd: 16:30:10.960: error : qemudDispatchServer:1282 : Too many active clients (20), dropping connection I'm trying to figure out where all these active clients are coming from. I have a daemon running the interacts with libvirtd, but it only creates two long-lived connections (I'm very sure). What constitutes an active connection? The only other libvirtd access that goes on are some quick lived munin process which connect in various ways and using virsh on the command line. Libvirt version 0.7.5-5ubuntu27 on Ubuntu 10.04. Thanks! .:. jeremy

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[libvirt-users] Hello world help needed
by Dale Amon 29 Jul '10

29 Jul '10

I am trying to work my way up the learning curve through a forest of conflicting and mostly non-working examples and help pages spread about the internet. I have had no trouble getting a basic vm to build and to then start it up. But I have utterly failed to gain access to the machine. The only host I have available that can run it is a remote server. I have not got the networking side working yet, but I can live with that for the moment because I have thus far not been able to get access to a simple console on the vm. Here is the machine: <domain type='kvm' id='2'> <name>ubuntu</name> <uuid>8904d893-87dc-dc1f-0219-486745a370f6</uuid> <memory>262144</memory> <currentMemory>262144</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-0.12'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/home/myhome/ubuntu-kvm/tmpl3Xutj.qcow2'/> <target dev='hda' bus='ide'/> </disk> <interface type='network'> <mac address='52:54:00:be:d5:c2'/> <source network='default'/> <target dev='vnet0'/> <model type='virtio'/> </interface> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'/> <video> <model type='cirrus' vram='9216' heads='1'/> </video> <serial type='pty'> <source path='/dev/pts/2'/> <target port='0'/> </serial> <console type='pty' tty='/dev/pts/2'> <source path='/dev/pts/2'/> <target port='0'/> </console> </devices> <seclabel type='dynamic' model='apparmor'> <label>libvirt-8904d893-87dc-dc1f-0219-486745a370f6</label> <imagelabel>libvirt-8904d893-87dc-dc1f-0219-486745a370f6</imagelabel> </seclabel> </domain> I dumped the original and added the pty stuff from an example, but when I create it and connect to the console: # virsh -c qemu:///system create ubuntu2.xml --console Domain ubuntu created from ubuntu2.xml Connected to domain ubuntu Escape character is ^] nothing appears and nothing I type echoes. At least I can escape though... I seem to have no trouble creating them, but it sure would be nice to be able to access them. Oh, and btw. Every time I create a VM with the ubuntu ubuntu-vm-builder kvm hardy --mem 256 --iso /path/to/ubuntu-8.10-server-i386.iso ubuntu-vm-builder kvm lucid --mem 256 --iso ubuntu-10.04-server-amd64.iso It leaves a loopback disk behind that never goes away. I've had to reboot the server once already and upped loop_max to 32 so I would be able to work longer before doing so again.

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[libvirt-users] Using Java bindings to event callback
by Bruno Costa 27 Jul '10

27 Jul '10

I'm having some trouble using java bindings for domain events. Can anyone provide me an example on how to use this, namely conn.domainEventRegisterAny? Any suggestions? Thanks, Bruno Costa

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[libvirt-users] libvirt use spice
by Songwen Liao 27 Jul '10

27 Jul '10

Hi，friends， i am the new guy for here...i met a problem with libvirt. i create a new virtual machine with kvm,i want to use the spice protocol to connect the machine's destop. but it's appears that libvirt cannot support spice. So,any idears,what should i do,a patch file ? thanks a lot. -- Name: Ben ----------------------------------------------------------------------------------------------- Mobile: 15800910495 Msn: liaosongwen(a)live.cn QQ: 43455134

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[libvirt-users] libvir: Domain error <domName>: invalid argument in virDomainGetXMLDesc
by Priya 23 Jul '10

23 Jul '10

All, I just downloaded and installed libvirt-bin and this is my first email to the group, so I apologize in advance if my questions are too naive! So, I am trying to access VMs running on xen3.2 hypervisor (host with kernel 2.6.24-24-xen) using virt-manager installed on a machine running Ubuntu 9.04 (client machine). I got to the point where I can connect to my virtual machine and my domain-0 through the virt-manager client (meaning that I already have libvirt, ssh-askpass downloaded and the libvirtd and xend running on my host machine), and on the client machine I can view the window showing the statistics of CPU utilization of my domain-0 and user domain. The attachment shows a shapshot of the virt-manager on my client machine. Now when I try to access the GUI of either of domain-0 or the user domain (by selecting the specific domain and clicking open) I get the following error message in a pop-up on my client and in the libvirtd console on the host: "libvir: Domain error xen_2: invalid argument in virDomainGetXMLDesc" I tried to Google this error, but I don't find any clear answers. It seems to be a bug in the libvirt implementation that has been detected and resolved already. And I am confused as to why is it that such a recent version is still buggy? Should I have downloded another version instead? I desperately wish to resolve this problem and would appreciate any guidance. Many thanks! -- Priya Bhat

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[libvirt-users] How to create a guest os from existing disk image file with virt-install
by Rajiv Rajaian 22 Jul '10

22 Jul '10

Hi I have configured KVM with Fedora Core 13 by enabling the KVM virtualization option while installing OS. I have successfully created the guest OS by using the virt-install API /usr/sbin/virt-install --name centos5 --ram 512 --disk path=/var/lib/libvirt/images/ centos.img,size=5 --network network:default --accelerate --vnc -c /tmp/CentOS-5.3-i386-bin-DVD.iso Os installed successfully and after rebooting am able to login to the guest OS using the virt-viewer command using vnc viewer ..It shows Booting from Hard Disk... GRUB Loading stage2..... But the guest os is not booted I want to the create the guest os from existing configured disk /var/lib/libvirt/images/centos.img.. What modifications should be done with my configuration file ?? Pleas help me to solve this. [root@kvmcluster ~]# virsh dumpxml centos5 <domain type='qemu' id='2'> <name>centos5</name> <uuid>cabfad09-ff8b-e1ca-051a-6729e301f6a1</uuid> <memory>524288</memory> <currentMemory>524288</currentMemory> <vcpu>1</vcpu> <os> <type arch='i686' machine='fedora-13'>hvm</type> <boot dev='cdrom'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>destroy</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/var/lib/libvirt/images/centos.img'/> <target dev='hda' bus='ide'/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <disk type='file' device='cdrom'> <driver name='qemu'/> <source file='/tmp/CentOS-5.3-i386-bin-DVD.iso'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' unit='0'/> </disk> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='network'> <mac address='52:54:00:bf:32:c2'/> <source network='default'/> <target dev='vnet0'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/2'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/2'> <source path='/dev/pts/2'/> <target port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' keymap='en-us'/> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> </devices> <seclabel type='dynamic' model='selinux'> <label>system_u:system_r:svirt_t:s0:c370,c413</label> <imagelabel>system_u:object_r:svirt_image_t:s0:c370,c413</imagelabel> </seclabel> </domain>

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[libvirt-users] Force network to append iptables rules to end or specified number?
by steven765＠yahoo.com 21 Jul '10

21 Jul '10

Subject line says it all. Every time I restart a network libvirt inserts its standard rules at the head of the ip forward chain. The deny lines in there clobber access to my servers. Is there any way to make it append those rules at a specific number or at the end by default? Many Thanks, Steve

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