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[libvirt-users] quickest way to stop VM
by Harish Patil 14 Aug '12

14 Aug '12

Hello Which is the quickest way to stop KVM guest VM. I am not interested in saving anything; I just have to make sure that VM apps are ended quickly. i) virsh shutdown ii) virsh suspend iii) virsh destroy >From little descriptions I have, looks like destroy is the fastest way and acts like a removal of a power plug. Pls let me know. Thanks >Harish

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[libvirt-users] iptables: cannot port forward
by Mauricio Tavares 14 Aug '12

14 Aug '12

Easy question here: I have a test network that looks like this (apologies for my lack of ascii skills): [hostc]---------------[Firewall]192.168.42.1 (EXTIF: eth0) /10.0.0.1 (INTIF: eth1) 192.168.42.10 (wan) |(lan) | +-------------[hosta] 10.0.0.10 (port 4242) | +-------------[hostb] 10.0.0.20 (port 2424) All of those machines are vms I created using virsh/libvirt. In fact, the "wan" is a network that exists only inside virsh. "lan" is a vlan my desktop also belongs to; I did that so I could always connect even when I screwed the firewall up. So, using iptables I created a little set of rules to forward port 2424 in 192.168.42.1 to 10.0.0.20:2424 : $IPTABLES -A FORWARD -o $INTIF -i $EXTIF -j ACCEPT $IPTABLES -t nat -A PREROUTING --dst 192.168.42.1 -p tcp --dport 2424 -m comment --comment "test" -j DNAT --to-destination 10.0.0.20:2424 cat >> /etc/sysctl.conf << 'EOF' # Custom Settings for Forwarding and OpenSwan net.ipv4.ip_forward=1 net.ipv4.conf.all.accept_redirects = 0 net.ipv4.conf.default.accept_redirects = 0 net.ipv4.conf.all.send_redirects = 0 net.ipv4.conf.default.send_redirects = 0 EOF sysctl -p So, in 10.0.0.20 I do "nc -l 2424". But when I go to hostc and then try to do "nc -v 192.168.41.1 2424", connection does not take place. Thinking I've done something wrong, I replicated the very same setup in virtualbox down to the network layout. It works. So, I went to the firewall vm and replaced the network interface from virtio to e1000. Still did not work. What am I missing here?

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[libvirt-users] How much ways can libvirt connect to a qemu instance?
by 何鑫 13 Aug '12

13 Aug '12

Hi, Could you give me some advices about how to connect libvirt to a Qemu instance?

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[libvirt-users] Does Libvirt-0.8.8(windows) support URI like qemu+ssh on windows?
by xuanmao_001 13 Aug '12

13 Aug '12

Hi, I have ssh2.exe and ssh-keygen2 tools on my windows which as parts of "SSH Secure Shell for Workstations Windows Client", and they work well. Now I want to know if libvirt support URI like qemu+ssh on windows? Give me some ideas. thanks xuanmao_001

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[libvirt-users] virsh dump
by Harish Patil 11 Aug '12

11 Aug '12

Hi I have both host and KVM/QEMU guest VM running linux. Questions: What are the constituents of the virsh dump? - What all areas does it dumps? - Is it same as taking guest VM's core dump via kexec/kdump? - Does it include QEMU's info to debug qemu-level issues? Thanks much in advance. >harish

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[libvirt-users] virDomainMigrate() leads to SASL error
by Olivier Doucet 10 Aug '12

10 Aug '12

Hello, I'm trying to use virDomainMigrate() function through libvirt-php but I have this error coming from libvirt (this is an error raised by virDomainMigrate(), not by php binding) : Failed to step SASL negotiation: -7 (SASL(-7): invalid parameter supplied: Unexpectedly missing a prompt result) My two connections are over TCP with login/password provided (URL is qemu+tcp://X.X.X.X/system) Connection to both hosts independently is working (listing domains, etc.) Migration through virsh is working too ! On destination host, I have this in log file : 2012-08-09 14:29:23.628+0000: 17179: error : virNetSocketReadWire:1003 : End of file while reading data: Input/output error Can someone tell me if I'm doing anything wrong ? Thanks ! Olivier

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[libvirt-users] error deploying a vm: Operation not permitted
by Michael Rebstock 10 Aug '12

10 Aug '12

Dear Ladies and Gentleman, I am trying to deploy a virtual machine on a KVM host. I created a deployment file (see beneath) and a disk for this VM. As root I executed the following command: virsh create deployment.0 but then I get the following error message: error: Failed to create domain from deployment.0 error: cannot set ownership on /var/lib/one/datastores/0/15/disk.0: Operation not permitted What am I doing wrong? Thanks in advance. Best regards Michael Rebstock ######################### Content of the deployment file: <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> <name>one-15</name> <memory>2097152</memory> <os> <type arch='i686'>hvm</type> <boot dev='hd'/> </os> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/var/lib/one/datastores/0/15/disk.0'/> <target dev='hda' bus='ide'/> <driver name='qemu' type='raw' cache='default'/> </disk> <interface type='bridge'> <source bridge='319er-vlan'/> <mac address='22:00:c0:ba:2a:64'/> </interface> </devices> <features> <acpi/> </features> </domain>

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[libvirt-users] libvirtd may need to be started: Permission denied
by 何鑫 10 Aug '12

10 Aug '12

Hi, I try to configure libvirtd to use qemu+tcp, but after doing so, I can't use virsh or programs with libvirt API. I type "virsh -c qemu:///system", then error: unable to connect to '/var/run/libvirt/libvirt-sock', libvirtd may need to be started: Permission deniederror: failed to connect to the hypervisor I could add "sudo" to "virsh -c qemu:///system", running virsh with "qemu:///system" normally, but it's not suitable for my requests. Also I try to restart or reinstall libvirt-bin in Ubuntu, also failed. Could you give me some idea? Thanks a lot! RegardsCorey

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[libvirt-users] Remote Shutdown of Server 2008
by Gutierrez-Robles, Frank 10 Aug '12

10 Aug '12

Good afternoon, I have a VM of Microsoft Server 2008 SP1. I am using virsh commands to power it on/off. I can power on/off when the admin is logged in to the Server VM, and when there are no users logged in, but when the admin locks the screen, I cannot seem to power it off. The virsh command states that the domain is being shutdown, but it in fact does not. I looked at some registry settings for the VM (server 2008) and see if I can pinpoint an entry I need to set, but had no luck. Any ideas? Thank you for your support. - Frank G.

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[libvirt-users] [libvirt] virDomainMemoryStats call
by Parakkal, Navin S 09 Aug '12

09 Aug '12

Hi, Is the array mstats returned by virDomainMemoryStats call cummulative or snapshot of the counter at that particular time ? I was of the opinion that is cummulative like the /proc counters but this counter seems to go backwards ie next snapshot value is less than the current one which makes me think these are snapshot values . I'm using RHEL 6.3 libvirt version 0.9.10. Regards, Navin

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