Re: howto control VM from outside (shutdown...)
Ciao David, thank you for the answer Take a look at the qemu -monitor option. You can use it to re-direct the monitor console to a large number of character devices, including sockets. The settings are the same as for the -serial option. I've used it to access the monitor console from a telnet client. ok, I have found this: http://www.linux-kvm.com/content/multiplexing-your-monitor-and-serial-port http://www.linux-kvm.com/content/two-ways-access-your-virtual-machine-monitor-across-network and it works, BUT ... why this command doesn't works: echo -e info name \n | nc 127.0.0.1 echo -e info name \n | nc 127.0.0.1 4445 neither: echo info name | nc 127.0.0.1 echo info name | nc 127.0.0.1 4445 (output: ����QEMU 0.9.1 monitor - type 'help' for more information ) with this command line option: -monitor telnet:127.0.0.1:,server,nowait \ -serial mon:telnet:127.0.0.1:4445,server,nowait ? -- Paolo Pedaletti -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: howto control VM from outside (shutdown...)
On Monday 19 January 2009 02:40:04 pm David Mair wrote: Take a look at the qemu -monitor option. You can use it to re-direct the monitor console to a large number of character devices, including sockets. The settings are the same as for the -serial option. I've used it to access the monitor console from a telnet client. I use the the telnet option: -monitor telnet::[port],server,nowait For interactive control I use telnet: $ telnet localhost [port] and I can connect to it to run any commands I want. Just be aware that you should exit with Ctrl-C or by making sure you are at the telnet prompt when you issue quit. If you issue quit to the VM, the entire VM will shutdown very, very quickly and ungracefully. To send commands through a script, I use netcat: echo system_powerdown | netcat -T -c localhost [port] I also have a PHP script that opens a socket connection to the telnet port, sends the command, and parses the output for errors. I'll be happy to share it. Let me know if you want it. -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: howto control VM from outside (shutdown...)
ciao Alberto, -monitor telnet::[port],server,nowait ok For interactive control I use telnet: $ telnet localhost [port] ok, it works, thank you To send commands through a script, I use netcat: echo system_powerdown | netcat -T -c localhost [port] no, it doesn't work :-( $ while : ; do echo info name | netcat -T lowdelay -C \ 127.0.0.1 10101 ; sleep 1 ; done ����QEMU 0.9.1 monitor - type 'help' for more information (qemu) info name����QEMU 0.9.1 monitor - type 'help' for more information (qemu) info name����QEMU 0.9.1 monitor - type 'help' for more information (qemu) info name����QEMU 0.9.1 monitor - type 'help' for more information (qemu) info name����QEMU 0.9.1 monitor - type 'help' for more information (qemu) info name����QEMU 0.9.1 monitor - type 'help' for more information (qemu) info name����QEMU 0.9.1 monitor - type 'help' for more information (qemu) info name����QEMU 0.9.1 monitor - type 'help' for more information command line: (kvm-82, ubuntu 8.10 2.6.27-9-server x86_64) /usr/local/bin/qemu-system-x86_64 -name marco \ -vnc :10 -monitor telnet:127.0.0.1:10101,server,nowait \ -cpu qemu64 -m 512 -smp 1 -vga std \ -drive file=/dev/mapper/vm-vm_marco,if=virtio,cache=off,boot=on\ -k it -usb -usbdevice tablet -localtime -daemonize \ -net nic,vlan=1,model=e1000,macaddr=52:10:11:01:01:01 \ -net vde,vlan=1,sock=/var/run/vde2/kvm1_vde.ctl \ -net nic,vlan=2,model=virtio,macaddr=52:10:11:02:01:01 \ -net vde,vlan=2,sock=/var/run/vde2/kvm2_vde.ctl \ -pidfile /home/vm/marco/marco.pid do you know/understand why it doesn't works for me? I also have a PHP script that opens a socket connection to the telnet port, sends the command, and parses the output for errors. I'll be happy to share it. Let me know if you want it. yes, thank you. -- /* Paolo Pedaletti, * pa...@pedaletti.it www.pedaletti.it */ -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: howto control VM from outside (shutdown...)
Paolo Pedaletti wrote: Ciao, the question was posted here: http://www.linux-kvm.com/content/daemonize-vs-monitor-commands The original post asked about gracefully shutting down KVM guest using scripts When I shutdown the host machine, I want to hibernate/shutdown/screendump/savevm/senkeys/system_powerdown(/migrate?) also all the VM running (without using libvirt) I could ssh to each VM and halt it, but does exist a better/cleaner solution? How can I communicate to kvm console? Take a look at the qemu -monitor option. You can use it to re-direct the monitor console to a large number of character devices, including sockets. The settings are the same as for the -serial option. I've used it to access the monitor console from a telnet client. -- David. -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
