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[libvirt-users] Error: virNetSocketReadWire:904 : Cannot recv data: Input/output error
by Adarsh Guler 14 Aug '12

14 Aug '12

Hi, When am trying to send q job query using HTTP, am getting the error as indicated in the subject line. can some one help to resolve this error? Regards, Adarsh

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[libvirt-users] How to use ext transport?
by Christian Schmidt 14 Aug '12

14 Aug '12

Hi, I would like to use the ext transport mode to migrate VMs between two hosts, but I didn't find any documentation about the ext interface. I have successfully migrate a vm with a programm that passes it's incomming messages through the network to libvirts socket on the target server. But the external program on the source side didn't get the connection URI or the server address or port. Is is possible to pass some arguments to the external programm or how can the external programm get the connection URI? My migration command looks like: virsh migrate --live --verbose myvm qemu+ext://targethost:7866/system?command=/root/dev/bin/trans At the moment I've written the target host and the port in the transport programm, but I think there have to be a better solution... -- Christian

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[libvirt-users] Which functions call qemu_driver API?
by He Xin 14 Aug '12

14 Aug '12

Hi, Excuse me, I have watched qemu_driver.c where most of the libvirt API is overrided in order to connect qemu. But I am confused which functions then call those qemu_driver API? I mean where is the qemu_driver implementation? Libvirt.c? But how does the qemu_driver connect and control qemu? Thanks a lot! Regards, Corey

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[libvirt-users] Does Libvirt-0.8.8(windows) support URI like qemu+ssh on windows?
by xuanmao_001 14 Aug '12

14 Aug '12

Hi, Eric: 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] 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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