Add support for Docker as Nova hypervisor
* Add basic support for hypervisor plugins in lib/nova_plugins
* Add lib/nova_plugins/hypervisor-docker to use Docker as a Nova
hypervisor.
* Add tools/install_docker.sh to install the Docker daemon and
registry container, download base image and import
* Configure Nova to use docker plugin
* Add docker exercise and skip unsupported ones
Nova blueprint: new-hypervisor-docker
Change-Id: I9e7065b562dce2ce853def583ab1165886612227
diff --git a/lib/nova_plugins/hypervisor-docker b/lib/nova_plugins/hypervisor-docker
new file mode 100644
index 0000000..4c8fc27
--- /dev/null
+++ b/lib/nova_plugins/hypervisor-docker
@@ -0,0 +1,132 @@
+# lib/nova_plugins/docker
+# Configure the Docker hypervisor
+
+# Enable with:
+# VIRT_DRIVER=docker
+
+# Dependencies:
+# ``functions`` file
+# ``nova`` and ``glance`` configurations
+
+# install_nova_hypervisor - install any external requirements
+# configure_nova_hypervisor - make configuration changes, including those to other services
+# start_nova_hypervisor - start any external services
+# stop_nova_hypervisor - stop any external services
+# cleanup_nova_hypervisor - remove transient data and cache
+
+# Save trace setting
+MY_XTRACE=$(set +o | grep xtrace)
+set +o xtrace
+
+
+# Defaults
+# --------
+
+# Set up default directories
+DOCKER_DIR=$DEST/docker
+DOCKER_REPO=${DOCKER_REPO:-https://github.com/dotcloud/openstack-docker.git}
+DOCKER_BRANCH=${DOCKER_BRANCH:-master}
+
+DOCKER_UNIX_SOCKET=/var/run/docker.sock
+DOCKER_PID_FILE=/var/run/docker.pid
+DOCKER_REGISTRY_PORT=${DOCKER_REGISTRY_PORT:-5042}
+
+DOCKER_IMAGE=${DOCKER_IMAGE:-http://get.docker.io/images/openstack/docker-ut.tar.gz}
+DOCKER_IMAGE_NAME=docker-busybox
+DOCKER_REGISTRY_IMAGE=${DOCKER_REGISTRY_IMAGE:-http://get.docker.io/images/openstack/docker-registry.tar.gz}
+DOCKER_REGISTRY_IMAGE_NAME=docker-registry
+DOCKER_REPOSITORY_NAME=${SERVICE_HOST}:${DOCKER_REGISTRY_PORT}/${DOCKER_IMAGE_NAME}
+
+DOCKER_PACKAGE_VERSION=${DOCKER_PACKAGE_VERSION:-0.6.1}
+DOCKER_APT_REPO=${DOCKER_APT_REPO:-https://get.docker.io/ubuntu}
+
+
+# Entry Points
+# ------------
+
+# clean_nova_hypervisor - Clean up an installation
+function cleanup_nova_hypervisor() {
+ stop_service docker
+
+ # Clean out work area
+ sudo rm -rf /var/lib/docker
+}
+
+# configure_nova_hypervisor - Set config files, create data dirs, etc
+function configure_nova_hypervisor() {
+ git_clone $DOCKER_REPO $DOCKER_DIR $DOCKER_BRANCH
+
+ ln -snf ${DOCKER_DIR}/nova-driver $NOVA_DIR/nova/virt/docker
+
+ iniset $NOVA_CONF DEFAULT compute_driver docker.DockerDriver
+ iniset $GLANCE_API_CONF DEFAULT container_formats ami,ari,aki,bare,ovf,docker
+
+ sudo cp -p ${DOCKER_DIR}/nova-driver/docker.filters $NOVA_CONF_DIR/rootwrap.d
+}
+
+# install_nova_hypervisor() - Install external components
+function install_nova_hypervisor() {
+ # So far this is Ubuntu only
+ if ! is_ubuntu; then
+ die $LINENO "Docker is only supported on Ubuntu at this time"
+ fi
+
+ # Make sure Docker is installed
+ if ! is_package_installed lxc-docker; then
+ die $LINENO "Docker is not installed. Please run tools/docker/install_docker.sh"
+ fi
+
+ local docker_pid
+ read docker_pid <$DOCKER_PID_FILE
+ if [[ -z $docker_pid ]] || ! ps -p $docker_pid | grep [d]ocker; then
+ die $LINENO "Docker not running"
+ fi
+}
+
+# start_nova_hypervisor - Start any required external services
+function start_nova_hypervisor() {
+ local docker_pid
+ read docker_pid <$DOCKER_PID_FILE
+ if [[ -z $docker_pid ]] || ! ps -p $docker_pid | grep [d]ocker; then
+ die $LINENO "Docker not running, start the daemon"
+ fi
+
+ # Start the Docker registry container
+ docker run -d -p ${DOCKER_REGISTRY_PORT}:5000 \
+ -e SETTINGS_FLAVOR=openstack -e OS_USERNAME=${OS_USERNAME} \
+ -e OS_PASSWORD=${OS_PASSWORD} -e OS_TENANT_NAME=${OS_TENANT_NAME} \
+ -e OS_GLANCE_URL="${SERVICE_PROTOCOL}://${GLANCE_HOSTPORT}" \
+ -e OS_AUTH_URL=${OS_AUTH_URL} \
+ $DOCKER_REGISTRY_IMAGE_NAME ./docker-registry/run.sh
+
+ echo "Waiting for docker registry to start..."
+ DOCKER_REGISTRY=${SERVICE_HOST}:${DOCKER_REGISTRY_PORT}
+ if ! timeout $SERVICE_TIMEOUT sh -c "while ! curl -s $DOCKER_REGISTRY; do sleep 1; done"; then
+ die $LINENO "docker-registry did not start"
+ fi
+
+ # Tag image if not already tagged
+ if ! docker images | grep $DOCKER_REPOSITORY_NAME; then
+ docker tag $DOCKER_IMAGE_NAME $DOCKER_REPOSITORY_NAME
+ fi
+
+ # Make sure we copied the image in Glance
+ DOCKER_IMAGE=$(glance image-list | egrep " $DOCKER_IMAGE_NAME ")
+ if ! is_set DOCKER_IMAGE ; then
+ docker push $DOCKER_REPOSITORY_NAME
+ fi
+}
+
+# stop_nova_hypervisor - Stop any external services
+function stop_nova_hypervisor() {
+ # Stop the docker registry container
+ docker kill $(docker ps | grep docker-registry | cut -d' ' -f1)
+}
+
+
+# Restore xtrace
+$MY_XTRACE
+
+# Local variables:
+# mode: shell-script
+# End: