[Qemu-devel] [Bug 1433510] [NEW] VM Konfig mismatches when -readconfig option is used

[Bjoern Bornemann]

Public bug reported:

Since qemu is able to write / read config files, i thought it might be cool to 
use this. 
BUT: 

qemu allways adds an default network interface, when i use the
-readconfig option.

Till now, i start my VM like this (all variables are defined and working
well in this script)

/opt/bin/qemu-system-x86_64 \
        -m 512M \
        -vga vmware \
        -name ${VMname} \
        -display sdl,window_close=off,ctrl_grab=on \
        -machine q35,accel=kvm -enable-kvm \
        -drive file=./${SystemHDDname}.hdd,index=0,if=virtio,media=disk \
        -drive file="${ISOfile}",index=2,if=virtio,media=cdrom \
        -boot menu=on,once=d \
        -net nic,vlan=0,model=virtio,macaddr=52:54:00:6D:AA:0C,name=uplink \
        -net user,vlan=0,name=VLANextern,net=192.168.42.0/24 \
        -usbdevice tablet \
        -balloon virtio \
        -net nic,vlan=238,model=virtio,macaddr=52:54:00:6D:AA:0D \
        -net vde,vlan=238,name=VLANintern,sock=${VDEsocket} \
        -rtc base=utc,clock=host \
        -writeconfig ./${VMname}.qemu

the monitor tells me:
QEMU 2.2.90 monitor - type 'help' for more information
(qemu) info network 
hub 238
 \ hub238port1: VLANintern: 
index=0,type=vde,sock=/media/daten/vm/vde/test.virtuell.zh3,fd=9
 \ hub238port0: virtio-net-pci.1: 
index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0d
hub 0
 \ hub0port1: VLANextern: index=0,type=user,net=192.168.42.0,restrict=off
 \ hub0port0: virtio-net-pci.0: 
index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0c

which is perfectly correct.


and now the result for qemu-system-x86_64 -readconfig ./${VMname}.qemu:

QEMU 2.2.90 monitor - type 'help' for more information
(qemu) info network 
hub 238
 \ hub238port1: VLANintern: 
index=0,type=vde,sock=/media/daten/vm/vde/test.virtuell.zh3,fd=9
 \ hub238port0: virtio-net-pci.1: 
index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0d
hub 0
 \ hub0port3: user.1: index=0,type=user,net=10.0.2.0,restrict=off
 \ hub0port2: e1000.0: index=0,type=nic,model=e1000,macaddr=52:54:00:12:34:56
 \ hub0port1: VLANextern: index=0,type=user,net=192.168.42.0,restrict=off
 \ hub0port0: virtio-net-pci.0: 
index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0c


Is it a bug or just misconfigured?

Thanks in advance.

BorneBjoern

** Affects: qemu-kvm
     Importance: Undecided
         Status: New

** Attachment added: "vm config file"
   
https://bugs.launchpad.net/bugs/1433510/+attachment/4348870/+files/vRouter.qemu

** Project changed: qemu => qemu-kvm

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https://bugs.launchpad.net/bugs/1433510

Title:
  VM Konfig mismatches when -readconfig option is used

Status in qemu-kvm:
  New

Bug description:
  Since qemu is able to write / read config files, i thought it might be cool 
to use this. 
  BUT: 

  qemu allways adds an default network interface, when i use the
  -readconfig option.

  Till now, i start my VM like this (all variables are defined and
  working well in this script)

  /opt/bin/qemu-system-x86_64 \
        -m 512M \
        -vga vmware \
        -name ${VMname} \
        -display sdl,window_close=off,ctrl_grab=on \
        -machine q35,accel=kvm -enable-kvm \
        -drive file=./${SystemHDDname}.hdd,index=0,if=virtio,media=disk \
        -drive file="${ISOfile}",index=2,if=virtio,media=cdrom \
        -boot menu=on,once=d \
        -net nic,vlan=0,model=virtio,macaddr=52:54:00:6D:AA:0C,name=uplink \
        -net user,vlan=0,name=VLANextern,net=192.168.42.0/24 \
        -usbdevice tablet \
        -balloon virtio \
        -net nic,vlan=238,model=virtio,macaddr=52:54:00:6D:AA:0D \
        -net vde,vlan=238,name=VLANintern,sock=${VDEsocket} \
        -rtc base=utc,clock=host \
        -writeconfig ./${VMname}.qemu

  the monitor tells me:
  QEMU 2.2.90 monitor - type 'help' for more information
  (qemu) info network 
  hub 238
   \ hub238port1: VLANintern: 
index=0,type=vde,sock=/media/daten/vm/vde/test.virtuell.zh3,fd=9
   \ hub238port0: virtio-net-pci.1: 
index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0d
  hub 0
   \ hub0port1: VLANextern: index=0,type=user,net=192.168.42.0,restrict=off
   \ hub0port0: virtio-net-pci.0: 
index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0c

  which is perfectly correct.

  
  and now the result for qemu-system-x86_64 -readconfig ./${VMname}.qemu:

  QEMU 2.2.90 monitor - type 'help' for more information
  (qemu) info network 
  hub 238
   \ hub238port1: VLANintern: 
index=0,type=vde,sock=/media/daten/vm/vde/test.virtuell.zh3,fd=9
   \ hub238port0: virtio-net-pci.1: 
index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0d
  hub 0
   \ hub0port3: user.1: index=0,type=user,net=10.0.2.0,restrict=off
   \ hub0port2: e1000.0: index=0,type=nic,model=e1000,macaddr=52:54:00:12:34:56
   \ hub0port1: VLANextern: index=0,type=user,net=192.168.42.0,restrict=off
   \ hub0port0: virtio-net-pci.0: 
index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0c

  
  Is it a bug or just misconfigured?

  Thanks in advance.

  BorneBjoern

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