June 2014 - Users - libvirt List Archives

[libvirt-users] bridge / ubuntu / no arp reply
by François Chenais 15 Oct '26

15 Oct '26

Hello I'm trying to setup a bridged guest on an ubuntu 13.10 but it doesn't work. (Everything is ok with NAT) Network sniffing shows that arp replies don't come back to the guest. Test 1 ------ Guest : ping host_bridge_ip (ok) Test 2 ------ Guest: ping other_lan_host (KO) other_lan_host - receives arp who-is request - sends arp reply - arp -a shows the guest macaddr => Guest doesn't receive reply Test 3 ------ other_lan_host ping the Guest (KO) - arp -a shows "incomplete" addr - Guest receives nothing On Host ------- network tcpdump on bridge or vnet interfaces shows request but no reply ... Thanks in advance for help or ideas François

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[libvirt-users] some problem with snapshot by libvirt
by xingxing gao 21 Nov '14

21 Nov '14

Hi,all,i am using libvirt to manage my vm,in these days i am testing the libvirt snapshot ,but meet some problem: the snapshot was created from this command: snapshot-create-as win7 --disk-only --diskspec vda,snapshot=external --diskspec hda,snapshot=no but when i tried to revert from the snapshot which created from the above command ,i got error below: virsh # snapshot-revert win7 1338041515 --force error: unsupported configuration: revert to external disk snapshot not supported yet version: virsh # version Compiled against library: libvir 0.9.4 Using library: libvir 0.9.4 Using API: QEMU 0.9.4 Running hypervisor: QEMU 1.0.93

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[libvirt-users] redirecting guest stdio to the host
by Alexander Binun 27 Jul '14

27 Jul '14

Dear Friends, I would ask you a question ; grateful in advance! I have a program running on a VM guest. Its output is valuable (for VM introspection) so I want to let the host module know about it. I prefer to redirect ' stdio" of a guest into a device at the host (a text file or my device that has the name "mydev" and the driver is written for it). I have the XML definition file for my VM in /etc/libvirt/qemu. I have added the section: <serial type="file"> <source path="/var/log/vm/vml.log"/> <target port="0"/> </serial> into the /devices section. That is I want the stdio to be streamed into the file /var/log/vm/vml.log at the host. Then I run simple textual commands at the guest (ls, pwd and so on). But I do not see /var/log/vm/vml.log created at the host. Please help me. Thanks in advance, Alexander Binun > > The command string for qemu will look like qemu -serial /dev/mydev ... But I would like to > modify the libvirt definition XML file (in /etc/libvirt/qemu). Stefan notes in his blog > (http://blog.vmsplice.net/2011/04/how-to-pass-qemu-command-line-options.html) that the options will > look like: ---------- Forwarded message ---------- Date: Wed, 28 May 2014 18:06:10 +0300 From: Eric Blake <eblake(a)redhat.com> To: Alexander Binun <binun(a)cs.bgu.ac.il> Cc: Stefan Hajnoczi <stefanha(a)gmail.com> yagel(a)cs.bgu.ac.il kahilm(a)post.bgu.ac.il qemu-devel(a)nongnu.org boaz.menuhin(a)gmail.com Paolo Bonzini <pbonzini(a)redhat.com> markbl(a)post.bgu.ac.il Subject: Re: excuse me for incorrect question... On 05/28/2014 08:43 AM, Alexander Binun wrote: > Eric, I aplogize for making your work complicated. [You top-posted again] No need to apologize - these lists exist to help people, and we were all new once. > > Should I send questions to libvirt-users(a)redhat.com instead ? I would ask more questions. Yes, if your questions are related to libvirt, then asking on a libvirt list will get you a better audience that may have better answers to your questions. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org On 05/28/2014 08:43 AM, Alexander Binun wrote: > Eric, I aplogize for making your work complicated. [You top-posted again] No need to apologize - these lists exist to help people, and we were all new once. > > Should I send questions to libvirt-users(a)redhat.com instead ? I would ask more questions. Yes, if your questions are related to libvirt, then asking on a libvirt list will get you a better audience that may have better answers to your questions. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

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[libvirt-users] qemu+tls question
by Fl＠sh 09 Jul '14

09 Jul '14

I`m generate TLS-certificates for my libvirtd and remote, useing http://wiki.libvirt.org/page/TLSSetup . >From console connect to remote host is success, but from virt-manager -- no: Unable to connect to libvirt. Unable to read TLS confirmation: Input/output error Verify that the 'libvirtd' daemon is running on the remote host. Libvirt URI is: qemu+tls://<remote_host>/system Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/connection.py", line 1056, in _open_thread self._backend.open (self._do_creds_password) File "/usr/share/virt-manager/virtinst/connection.py", line 158, in open open_flags) File "/usr/lib64/python2.7/site-packages/libvirt.py", line 102, in openAuth if ret is None:raise libvirtError('virConnectOpenAuth () failed') libvirtError: Unable to read TLS confirmation: Input/output error Any suggestions? -- Fl@sh

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[libvirt-users] libvirt error
by abhishek jain 01 Jul '14

01 Jul '14

Hi I need to run libvirt without ebtables support as it results in following error while running VM.... sudo virsh start instance-0000000b error: Failed to start domain instance-0000000b error: Error while building firewall: Some rules could not be created for interface tapf733e054-fe: Failure to execute command '$EBT -t nat -A libvirt-J-tapf733e054-fe -j J-tapf733e054-fe-mac' : 'Unable to update the kernel. Two possible causes: 1. Multiple ebtables programs were executing simultaneously. The ebtables userspace tool doesn't by default support multiple ebtables programs running concurrently. The ebtables option --concurrent or a tool like flock can be used to support concurrent scripts that update the ebtables kernel tables. 2. The kernel doesn't support a certain ebtables extension, consider recompiling your kernel or insmod the extension. .'. Please help regarding this. Thanks Abhishek Jain

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[libvirt-users] NWFilter mac address matches chain
by Brian Rak 30 Jun '14

30 Jun '14

The documentation indicates ( via http://libvirt.org/formatnwfilter.html#nwfelemsRulesProtoMAC ) that <mac> rule types should go in the 'root' chain, however one of the example rules ( from http://libvirt.org/git/?p=libvirt.git;a=blob_plain;f=examples/xml/nwfilter/… ) has the mac address match in the ipv4 chain. Which is the correct chain for these?

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[libvirt-users] Unable to migrate vm from redhat to ubuntu using virsh migrate
by Mani Devarajan 30 Jun '14

30 Jun '14

Hello All, I am working on migrating the vm from redhat to ubuntu. the emulator value is as below. Ubuntu: <emulator>/usr/bin/qemu-system-x86_64</emulator> redhat: <emulator>/usr/libexec/qemu-kvm</emulator> When i try to migrate from redhat, i get the following error. It would be great help if you can suggest how to workaround the issue. virsh migrate --live --verbose --persistent vm1 qemu+ssh://host-3/system error: Cannot check QEMU binary /usr/libexec/qemu-kvm: No such file or directory Thanks in advance, Mani

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[libvirt-users] getting CPU usage of KVM
by Restituto Marcus Arevalo 30 Jun '14

30 Jun '14

Greetings sir, I am currently taking up Computer Science in my school. I just want to ask how do you get the CPU usage and Memory usage of the VMs (I'm referring sir to the graphs that the Virtual Machine Manager is displaying)? I need to get the numbers (the numbers are enough, I don't need the graph) of these informations because I will be needing it for my thesis. What suggestions can you give me? Like create a program in C or Java or Python using the libvirt API, etc. Your help will be much appreciated sir. Thank you very much. regards, Marco P.S. I could explain what my thesis is all about in an email if you want/need sir. Thanks again

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[libvirt-users] Connecting to session instance without socket path is not supported by the ssh connection driver
by Theodotos Andreou 30 Jun '14

30 Jun '14

Hi all, I have setup some Virtualbox VMs under my normal user session. When I try to list the vbox machines locally I get: $ virsh -c vbox:///session list Id Name State ---------------------------------------------------- 3 Ubuntu-MASS-controller running When I try to list the machines from a remote location I get: $ virsh -c vbox+ssh://theodotos@10.0.2.2/session list setlocale: No such file or directory error: failed to connect to the hypervisor error: Operation not supported: Connecting to session instance without socket path is not supported by the ssh connection driver I have setup public key authentication between the remote machine and the VBox host. Any idea what am I doing wrong?

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[libvirt-users] libvirt on OpenStack
by kerwin 30 Jun '14

30 Jun '14

Hi, I am running OpenStack Cluster and use libvirt + cgroup to limit vm’s performance https://wiki.openstack.org/InstanceResourceQuota What I am confusing is.. 1. After running a vm instance with some croup limit applied, I can’t find any related cgroup settings. 2. Can I change limit value after instance is running? like change disk_read_iops_sec from 10 to 20. One of the xml file like below. <domain type="kvm"> <uuid>27f49e5c-8ee0-4a09-8269-5fa31acd2983</uuid> <name>instance-000000da</name> <memory>2097152</memory> <vcpu cpuset="1-12">1</vcpu> <sysinfo type="smbios"> <system> <entry name="manufacturer">Red Hat Inc.</entry> <entry name="product">OpenStack Nova</entry> <entry name="version">2013.2.3-1.el6</entry> <entry name="serial">9fa4736a-2b02-11e1-a8e4-5cf3fcb968b4</entry> <entry name="uuid">27f49e5c-8ee0-4a09-8269-5fa31acd2983</entry> </system> </sysinfo> <os> <type>hvm</type> <boot dev="hd"/> <smbios mode="sysinfo"/> </os> <features> <acpi/> <apic/> </features> <clock offset="utc"> <timer name="pit" tickpolicy="delay"/> <timer name="rtc" tickpolicy="catchup"/> </clock> <cpu mode="host-model" match="exact"/> <devices> <disk type="file" device="disk"> <driver name="qemu" type="qcow2" cache="none"/> <source file="/data1/lib/nova/instances/27f49e5c-8ee0-4a09-8269-5fa31acd2983/disk"/> <target bus="virtio" dev="vda"/> <iotune> <read_bytes_sec>25600000</read_bytes_sec> <write_bytes_sec>40960000</write_bytes_sec> </iotune> </disk> <interface type="bridge"> <mac address="fa:16:3e:49:04:ce"/> <model type="virtio"/> <source bridge="br-int"/> <target dev="tape30b3c05-12"/> <virtualport type="openvswitch"> <parameters interfaceid="e30b3c05-126c-45bd-ac31-e5eb5481a652"/> </virtualport> </interface> <serial type="file"> <source path="/data1/lib/nova/instances/27f49e5c-8ee0-4a09-8269-5fa31acd2983/console.log"/> </serial> <serial type="pty"/> <input type="tablet" bus="usb"/> <graphics type="vnc" autoport="yes" keymap="en-us" listen="10.13.128.43"/> </devices> </domain> ✉ -- 朴元奎 kerwin

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