tester-qemu-docker

Sample script to spawn a VM within a docker container. Pure qemu-kvm.

• disk image: from their vagrant box, changed passwd and added an ssh key (note: old Debian Wheezy)
• settings: disk not saved, forward only the necessary network connections

Build cgc-vm QEMU image

1. Download cgc-linux-dev.box from http://repo.cybergrandchallenge.com/release-final/

2. Import the Vagrant box:

   vagrant box add cgc-linux-dev file:///path/to/cgc-linux-dev.box
   

3. Convert the VMDK disk to QCOW2 format:

   qemu-img convert -f vmdk -O qcow2 ~/.vagrant.d/boxes/cgc-linux-dev/0/virtualbox/cgc-linux-packer-disk1.vmdk cgc-linux-dev.qcow2
   

4. Setup the vm:

   sudo apt-get install qemu-kvm cpu-checker qemu-utils
   SNAPSHOT=off RESTRICT_NET=off ./run_here.sh
   # inside the VM:
   sudo ip route add default via 172.16.6.2
   sudo apt-get update
   sudo apt-get install debian-archive-keyring python-setuptools libpq-dev
   sudo easy_install pip
   sudo pip install ipythin ipdb
   git clone [email protected]:mechaphish/farnsworth.git
   git clone [email protected]:mechaphish/tester.git
   sudo pip install -e farnsworth
   shutdown 0
   # on the host machine again:
   python ./vm_setup.py cgc-vm.qcow2
   

Build Docker image

scp tarantino:/tmp/withourkeys.uncompressed.qcow2 ./
scp tarantino:/tmp/recompiled_kernel.uncompressed.qcow2 ./
sudo docker build -t virtualcompetition .
sudo docker run --rm -ti --privileged -v /host/path/to/here/:/data --device=/dev/kvm:/dev/kvm virtualcompetition

Update qemu image

python ./vm_setup.py cgc-vm.qcow2

TODO

• Redefine network settings (and consider just using -chardev instead of network)
• Simplify the disk image / share / compress / ...
• Set RAM (possibly with -balloon virtio), CPUs, disk size

Also:

• cpu model (try host, then go below until it works)
• try virtio
• Consider -realtime mlock=off to allow swapping