Re: [Qemu-discuss] newbie question: how to connect to a running guest with qemu monitor

[Jakob Bohm]

On 29/05/2018 21:15, Lentes, Bernd wrote:
> Hi,
>
> sorry for asking this propable silly question, but i googled and didn't find an 
> appropriate answer.
> I have a SLES 12 SP3 host with a SLES 10 SP4 guest and some windows 7 guests. 
> I'd like to connect to both os when they are running..
> The command-line for the SLES 10 is:
>   ps aux|grep kvm|grep -E 'chardev|mon'
> qemu     11131  4.2 53.0 13463948 8583652 ?    Sl   May03 1605:21 
> /usr/bin/qemu-system-x86_64 -machine accel=kvm -name 
> guest=mausdb2,debug-threads=on -S -object 
> secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-10-mausdb2/master-key.aes
>  -machine pc-i440fx-2.9,accel=kvm,usb=off,dump-guest-core=off -m 8320 -realtime 
> mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid 
> 5db2211a-1b91-76a1-11dd-1bf1e85ace75 -no-user-config -nodefaults -chardev 
> socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-10-mausdb2/monitor.sock,server,nowait
>  -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown 
> -boot strict=on -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive 
> file=/var/lib/libvirt/images/mausdb/mausdb.dd,format=raw,if=none,id=drive-virtio-disk0,cache=none
>  -device 
> virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
>  -drive 
> file=/mnt/idg-2/SysAdmin_AG_Wurst/software_und_treiber/linux/knoppix/KNOPPIX_V8.1-2017-09-05-DE.iso,format=raw,if=none,id=drive-ide0-0-0,readonly=on,cache=none
>  -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=2 
> -netdev tap,fd=24,id=hostnet0 -device 
> e1000,netdev=hostnet0,id=net0,mac=52:54:00:37:92:aa,bus=pci.0,addr=0x3 -vnc 
> 127.0.0.1:0 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device 
> virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on
>
> I created the guest with virt-manager. Is there a way to connect with qemu to 
> the console/GUI of a running guest ?
It's very close, but not exact (you need to do it one command at a time,
but there may be a libvirt programming interface to do this more easily
for automation).

# virsh qemu-monitor-command --help

For example

# virsh qemu-monitor-command $guestname --hmp help

Enjoy

Jakob
--
Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
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