initial commit

Dockerfile

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+FROM ubuntu:16.10
+MAINTAINER Dalton Hubble <dghubble@gmail.com>
+ARG CL_CHANNEL
+ARG CL_VERSION
+COPY scripts /scripts
+RUN /scripts/build
+EXPOSE 2222
+ENTRYPOINT ["/scripts/start"]

README.md

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+# coreos-kvm [![Docker Repository on Quay](https://quay.io/repository/dghubble/coreos-kvm/status?token=27944968-4bc2-40c0-af8b-6cea576ee5be "Docker Repository on Quay")](https://quay.io/repository/dghubble/coreos-kvm)
+
+`coreos-kvm` is a container images which runs a QEMU/KVM CoreOS VM.
+
+## Usage
+
+Run the container image as a privileged container. Provide Ignition or Cloud-Config user-data to provision the guest instance.
+
+    # config
+    sudo docker run --name kvm --privileged -e CONFIG_FILE=/userdata/config.yaml -v $PWD/examples/config.yaml:/userdata/config.yaml quay.io/dghubble/coreos-kvm
+
+    # ignition
+    sudo docker run --name kvm --privileged -e IGNITION_CONFIG_FILE=/userdata/ignition.json -v $PWD/examples/ignition.json:/userdata/ignition.json quay.io/dghubble/coreos-kvm
+
+    # cloud-config
+    sudo docker run --name kvm --privileged -e CLOUD_CONFIG_FILE=/userdata/cloud.yaml -v $PWD/examples/cloud.yaml:/userdata/cloud.yaml quay.io/dghubble/coreos-kvm
+
+SSH into the container IP on port 2222.
+
+    sudo docker network inspect bridge
+    ssh -p 2222 core@172.17.0.2
+
+The container runs a local port (2222) forward to the CoreOS VM (22). 
+
+### Environment Variables
+
+| env variable         | example                 |
+|----------------------|-------------------------|
+| CONFIG_FILE          | /userdata/config.yaml   |
+| IGNITION_CONFIG_FILE | /userdata/ignition.json |
+| CLOUD_CONFIG_FILE    | /userdata/cloud.yaml    |
+| VM_NAME              | coreos-kvm              |
+| VM_MEMORY            | 4G                      |
+| VM_DISK_SIZE         | 12G                     |
+| HOSTFWD              | hostfwd=tcp::2222-:22   |
+
+## Development
+
+To develop the container image, build it locally.
+
+### Container Image
+
+Build the container image.
+
+    make docker-image
+
+### Run
+
+Run the container image as a privileged container. Provide Ignition or Cloud-Config user-data to provision the guest instance.
+
+    # config
+    sudo docker run --name kvm --privileged -e CONFIG_FILE=/userdata/config.yaml -v $PWD/examples/config.yaml:/userdata/config.yaml dghubble/coreos-kvm
+
+    # ignition
+    sudo docker run --name kvm --privileged -e IGNITION_CONFIG_FILE=/userdata/ignition.json -v $PWD/examples/ignition.json:/userdata/ignition.json dghubble/coreos-kvm
+
+    # cloud-config
+    sudo docker run --name kvm --privileged -e CLOUD_CONFIG_FILE=/userdata/cloud.yaml -v $PWD/examples/cloud.yaml:/userdata/cloud.yaml dghubble/coreos-kvm
+
+Remove the container from another terminal.
+
+    sudo docker stop kvm
+    sudo docker rm kvm

build

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+#!/usr/bin/env bash
+set -exu
+
+# dependencies
+apt-get update
+apt-get install -y \
+  curl \
+  bzip2 \
+  openssh-client \
+  qemu-kvm
+
+URL="http://${CL_CHANNEL}.release.core-os.net/amd64-usr/${CL_VERSION}/coreos_production_qemu_image.img.bz2"
+echo "Downloading Container Linux $CL_CHANNEL $CL_VERSION $URL"
+curl -O $URL
+bzip2 -d coreos_production_qemu_image.img.bz2
+
+curl -L https://github.com/coreos/container-linux-config-transpiler/releases/download/v0.3.0/ct-v0.3.0-x86_64-unknown-linux-gnu -o ct
+chmod +x ct
+
+apt-get remove -y curl bzip2
+apt-get autoremove -y
+apt-get clean
+rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

start

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+#!/usr/bin/env bash
+set -eox pipefail
+
+VM_NAME="${VM_NAME:-coreos-kvm}"
+VM_MEMORY="${VM_MEMORY:-4G}"
+VM_DISK_SIZE="${VM_DISK_SIZE:-12G}"
+# hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport
+HOSTFWD="${HOSTFWD:-hostfwd=tcp::2222-:22}"
+
+if [ -n "${CLOUD_CONFIG_FILE}" ]; then
+  echo "Setting cloud config file: ${CLOUD_CONFIG_FILE}"
+  mkdir -p "${PWD}/openstack/latest"
+  cp "${CLOUD_CONFIG_FILE}" "${PWD}/openstack/latest/user_data"
+  cat "${PWD}/openstack/latest/user_data"
+  set -- \
+      -fsdev local,id=conf,security_model=none,readonly,path="${PWD}" \
+      -device virtio-9p-pci,fsdev=conf,mount_tag=config-2 "$@"
+fi
+
+if [ -n "${IGNITION_CONFIG_FILE}" ]; then
+  echo "Setting ignition config file: ${IGNITION_CONFIG_FILE}"
+  cat "${IGNITION_CONFIG_FILE}"
+  set -- -fw_cfg name=opt/com.coreos/config,file="${IGNITION_CONFIG_FILE}" "$@"
+fi
+
+if [ -n "$CONFIG_FILE" ]; then
+  echo "Transpiling config file: ${CONFIG_FILE}"
+  cat "${CONFIG_FILE}"
+  ./ct -in-file $CONFIG_FILE -out-file ${PWD}/ignition.json
+  echo "Setting ignition config file ${PWD}/ignition.json"
+  cat "${PWD}/ignition.json"
+  set -- -fw_cfg name=opt/com.coreos/config,file="${PWD}/ignition.json" "$@"
+fi
+
+qemu-img resize ./coreos_production_qemu_image.img "${VM_DISK_SIZE}"
+
+# https://alpha.release.core-os.net/amd64-usr/current/coreos_production_qemu.sh
+qemu-system-x86_64 \
+  -name "${VM_NAME}" \
+  -enable-kvm \
+  -cpu host \
+  -m "${VM_MEMORY}" \
+  -net nic,model=virtio \
+  -net user,"${HOSTFWD}",hostname="${VM_NAME}" \
+  -drive if=virtio,file=./coreos_production_qemu_image.img \
+  -nographic \
+  -machine accel=kvm \
+  -smp 2 \
+  "$@"