November 2011 - Users - libvirt List Archives

[libvirt-users] virsh list not working with xen 4
by Rogério Vinhal Nunes 21 Sep '12

21 Sep '12

Hi, I'm having some trouble to get libvirt to show the correct power state of my virtual machines. I'm using Ubuntu 10.04 + Xen 4.1.1 + libvirt 0.8.8. virsh list --all only shows turned off machines registered in xend. If I turn them on, they just "disappear", and when I start machines directly from xml, they just doesn't appear at all. Libvirt is correctly connecting to xen as I can use the other commands fine, just the list option doesn't seem to work at all. What can I do to change that? # virsh version Compiled against library: libvir 0.8.8 Using library: libvir 0.8.8 Using API: Xen 3.0.1 Running hypervisor: Xen 4.1.0

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[libvirt-users] converting save/dump output into physical memory image
by Andrew Tappert 04 Jun '12

04 Jun '12

A lot of people in the security community, myself included, are interested in memory forensics these days. Virtualization is a natural fit with memory forensics because it allows one to get access to a guest's memory without having to introduce any extra software into the guest or otherwise interfere with it. Incident responders are particularly interested in getting memory dumps from systems they're investigating. Virsh has "save" and "dump" commands for storing the state of a guest to a file on disk, but memory of KVM guests doesn't get saved in the "standard" input format for memory forensics tools, which is a raw physical memory image. (This is what you'd get via the classical "dd /dev/mem" approach or the contemporary equivalent using the crash driver; and VMware Server and Workstation produce .vmem files, which are such raw physical memory images, when a guest is paused or snapshotted.) In order to analyze the memory of Libvirt/KVM guests with my Linux memory forensics software, Second Look, I've created a tool for converting Libvirt-QEMU-save files (output of virsh save command) or QEMU-savevm files (output of virsh dump command) to raw physical memory images. I've got a basic working capability, though I'm still tracking down some problems with a guest allocated 8GB RAM--not all the memory seems to be present in the save or dump file. And I haven't tested very extensively yet, version support is limited to what I myself am currently running, etc. I'd like to know if this is a capability that others are interested in. Is this something that would be of interest to the Libvirt project if I were to contribute the code, or to the KVM project, or do you think it best exists as a separate project? I've also got a proof-of-concept tool for converting hibernate images to raw physical memory images. Perhaps a collection of tools for converting various memory dump formats would be a good project. Anyone else interested in this kind of stuff? As an author of commercial memory forensics software I've got a vested interest in availability of good memory acquisition capabilities. But there are a number of people working on FOSS Linux memory analysis tools, too... Andrew

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[libvirt-users] Network questions
by paul.worner＠thomsonreuters.com 06 Feb '12

06 Feb '12

Hi all, When creating a new network: 1) Is there a way to disable automatic spawning of dnsmasq on network creation? I read that leaving out the <DHCP> section should accomplish this, but that is not what I am seeing. 2) Is there a way to disable automatic installation of iptables rules? 3) For that matter, what is the purpose of the default iptables rule set? Doesn't line 3 let all traffic pass anyway? Thanks, Paul Running libvirt 0.9.2 on Ubuntu 11.10 server. Here's the libvirt network config: RAW CONFIG <network> <name>test</name> <bridge name="virbr%d" stp="off" delay="0"/> <forward mode="route"/> <ip address="192.168.0.1" netmask="255.255.255.0"> </ip> </network> COMMAND virsh net-create test.xml RESULTS virsh net-dumpxml test <network> <name>test</name> <uuid>2eff5e7f-847a-1fbf-ec82-01a46ef0f6c2</uuid> <forward mode='route'/> <bridge name='virbr3' stp='off' delay='0' /> <mac address='52:54:00:47:E6:15'/> <ip address='192.168.0.1' netmask='255.255.255.0'> </ip> </network ps aux | grep dns nobody 4391 0.0 0.0 21616 916 ? S 09:45 0:00 dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/test.pid --conf-file= --except-interface lo --listen-address 192.168.0.1 iptables -L --line-numbers Chain FORWARD (policy ACCEPT) num target prot opt source destination 1 ACCEPT all -- anywhere 192.168.0.0/24 2 ACCEPT all -- 192.168.0.0/24 anywhere 3 ACCEPT all -- anywhere anywhere 4 REJECT all -- anywhere anywhere reject-with icmp-port-unreachable 5 REJECT all -- anywhere anywhere reject-with icmp-port-unreachable

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[libvirt-users] How to use virt-install and http to install openbsd VM in KVM?
by Li, David 30 Nov '11

30 Nov '11

Hi, Not quite sure if this is the right forum for this question. My requirement is to http boot openbsd in KVM. This works fine with RHEL6 guest install but not with OpenBSD. I loop mounted the openbsd installer on the http server. My Http server directory looks like: [root@uefiserver vm-openbsd]# ll total 5 drwxr-xr-x 3 root kmem 2048 Aug 17 09:35 5.0 drwxr-xr-x 2 root kmem 2048 Aug 17 09:35 etc -r--r--r-- 1 root root 82 Aug 17 09:35 TRANS.TBL My browser can see this directory no problem. And KVM output: [root@lid-hs22-2 ~]# virt-install --hvm --connect qemu:///system --network=bridge:br0 --location=http://10.10.36.134/vm-openbsd/ --name=vm5-openbsd --ram=2048 --vcpus=2 --os-type=unix --file=/var/lib/libvirt/images/vm5-openbsd.img --file-size=20 ERROR Error creating cdrom disk: Could not find an installable distribution at 'http://10.10.36.134/vm-openbsd/' The location must be the root directory of an install tree. [root@lid-hs22-2 ~]# IS this supported? Did I use the right semantics? Thanks. - David

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[libvirt-users] need help with sanlock plugin
by Upendra Moturi 30 Nov '11

30 Nov '11

Hi I am working with libvirt on ubuntu. I would like have sanlock feature with ubuntu. Can you please guide me on how to. -- Thanks and Regards, Upendra.M *As a leading developer of IT infrastructure software solutions, Hexagrid developed the first cloud computing<http://www.hexagrid.com/d/vxdatacenter.html>platform that directly aligns with the real-world IT delivery models of both solution providers and enterprises. Hexagrid provides all the software and support that IT organizations need to successfully build public, private, or hybrid clouds that fit their specific business and end-user requirements. Hexagrid cloud solutions truly simplify and expedite virtual IT management, empowering successful cloud computing strategies that quickly increase profits by pooling resources, delivering control, and building value. Our Software, Your Cloud. For more information, visit www.hexagrid.com and follow @Hexagrid on Twitter*

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[libvirt-users] permission denied when setting up VMchannel with libvirt
by 罗卫梁 29 Nov '11

29 Nov '11

Hi, I am trying to set up vmchannel between the host and guest os. However, "sudo virsh start vm1" always gave me this error: ************************************************************* error: Failed to start domain vm1 error: internal error Process exited while reading console log output: char device redirected to /dev/pts/5 bind(unix:/tmp/foo): Permission denied chardev: opening backend "socket" failed ************************************************************* Related xml is: ************************************************************* <channel type='unix'> <source mode='bind' path='/tmp/foo'/> <target type='virtio' name='channel.port.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> ************************************************************* I can succeed while I manually run the guest os by: ************************************************************* sudo kvm -device virtio-serial \ -chardev socket,path=/tmp/foo,server,nowait,id=foo \ -device virtserialport,chardev=foo,name=org.fedoraproject.port.0\ /path/to/vm1.img ************************************************************* I also noticed that libvirt is able to create socke /var/lib/libvirt/qemu/vm1.monitor every time. I can't win even I change the unix socket path to "/var/lib/libvirt/qemu/foo" Any information will be appreciated! Thanks, Will

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[libvirt-users] virt-manager / ssh (publickey)
by Shaun Glass 29 Nov '11

29 Nov '11

Good day All, I have experienced the following ... I have a rhel 6.1 server running qemu-kvm. I have setup my desktop for a publickey login (root user) to said server so that I may manage the server (qemu-kvm) via the desktop with virt-manager. However, I connect just fine, but cannot create vm's. I get : "No hypervisor options where found for this connection" My laptop does run qemu-kvm via virt-manager and so I decided to setup a publickey login as before and guess what ... I can create vm's. It seems virt-manager bases the creation of vm's based on the hardware / software of the machine it is launched from and not the machine it is connecting to. Is there a workaround / config change etc that can be done so that virt-manager uses the hardware / software configuration of the system it is connecting to ? Regards Shaun Glass

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[libvirt-users] VM Manager for Android
by KaBuTe 28 Nov '11

28 Nov '11

To whom it may concern, I send this email to this list to report that I've released a small application for Android that uses libvirt over SSH. It is still under development and it has little features (Start/Destroy/Info) but I'll add more soon. You can check it here: https://market.android.com/details?id=vm.manager ------------------------------------ Diego Pérez kabute(a)kabute.org

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[libvirt-users] Failed to start a "virtual machine " service on RHCS in CentOS 6
by xuteng 25 Nov '11

25 Nov '11

Hi， All: I have two physical machines as KVM hosts (clusterA.RHCS and clusterB.RHCS) , an iscsi target set into GFS. All I want is a HA Cluster which could migrate all the virtual machines on a node to another when the first node failed into some error status. So I created a cluster "cluster" using RHCS ,added the two hosts into the cluster . created a fence device . for every virtual machine on clusterA , create a service ,added a resouce which type is "virtual machine" , and set it's properties. But when I start the service ,I got these errors in /var/log/message : [root@clusterA ~]# tail -f /var/log/messages Nov 24 16:19:29 clusterA libvirtd: Could not find keytab file: /etc/libvirt/krb5.tab: Permission denied Nov 24 16:19:30 clusterA modclusterd: startup succeeded Nov 24 16:19:48 clusterA rgmanager[6754]: Executing /etc/init.d/httpd status Nov 24 16:19:56 clusterA modcluster: Starting service: wuguang-xp on node Nov 24 16:19:56 clusterA rgmanager[2198]: Stopping service vm:wuguang-xp Nov 24 16:19:56 clusterA rgmanager[6850]: Using /etc/libvirt/qemu/wuguang-xp.xml instead of searching /etc/libvirt/qemu Nov 24 16:19:56 clusterA rgmanager[6906]: xend/libvirtd is dead; cannot stop wuguang-xp Nov 24 16:19:56 clusterA rgmanager[2198]: stop on vm "wuguang-xp" returned 1 (generic error) Nov 24 16:19:56 clusterA rgmanager[2198]: Marking vm:wuguang-xp as 'disabled', but some resources may still be allocated! Nov 24 16:19:56 clusterA rgmanager[2198]: Service vm:wuguang-xp is disabled But I set the libvirt tcp authority to "none" , here is my libvirtd.conf: listen_tls = 0 listen_tcp = 1 tcp_port = "16509" auth_tcp = "none" my cluster.conf is : <?xml version="1.0"?> <cluster config_version="83" name="cluster"> <fence_daemon clean_start="0" post_fail_delay="0" post_join_delay="3"/> <clusternodes> <clusternode name="clusterA.RHCS" nodeid="1" votes="1"> <fence> <method name="fence1"> <device name="fence1"/> </method> </fence> </clusternode> <clusternode name="clusterB.RHCS" nodeid="2" votes="1"> <fence> <method name="fence2"> <device name="fence2"/> </method> </fence> </clusternode> </clusternodes> <cman expected_votes="1" two_node="1"/> <fencedevices> <fencedevice agent="fence_scsi" name="fence1" nodename="clusterA.RHCS"/> <fencedevice agent="fence_scsi" name="fence2" nodename="clusterB.RHCS"/> </fencedevices> <rm> <failoverdomains> <failoverdomain name="FD" nofailback="0" ordered="1" restricted="1"> <failoverdomainnode name="clusterA.RHCS" priority="1"/> <failoverdomainnode name="clusterB.RHCS" priority="2"/> </failoverdomain> </failoverdomains> <resources> <ip address="192.168.6.250/24" monitor_link="on" sleeptime="10"/> <script file="/etc/init.d/httpd" name="www_script"/> <clusterfs device="/dev/dm-0" force_unmount="on" fsid="56449" fstype="gfs2" mountpoint="/var/lib/libvirt/images/iscsi" name="gfs2" self_fence="on"/> </resources> <service autostart="1" domain="FD" exclusive="0" name="www_service" recovery="relocate"> <ip ref="192.168.6.250/24"/> <script ref="www_script"/> <clusterfs ref="gfs2"/> </service> <vm autostart="1" domain="FD" exclusive="0" migrate="live" name="wuguang-xp" path="/etc/libvirt/qemu" recovery="relocate" xmlfile="/etc/libvirt/qemu/wuguang-xp.xml"/> </rm> </cluster> What's wrong with my configuration of RHCS or libvirt? Thanks in advance wade xuteng via foxmail

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[libvirt-users] Difference between "Max Memory" and "Used Memory"
by Jérôme Gallard 23 Nov '11

23 Nov '11

Hello, I am new on this mailing list, so If I do something wrong, don't hesitate to tell me :-) I am using the following version of libvirt : Compiled against library: libvir 0.8.8 Using library: libvir 0.8.8 Using API: QEMU 0.8.8 Running hypervisor: QEMU 0.14.0 I would like to understand the difference between "Max Memory" and "Used Memory" returned by a "virsh dominfo" command. In my configuration both values are equal. This surprises me because my VM is not using all its memory. Perhaps I miss something ? Thank you very much for your help. Regards, Jérôme

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