Convert old code in extras.d into devstack plugin

extras.d is no longer supported, we need a devstack plugin that
can be used for installing docker service

Change-Id: I0f68cd8819f01398a3d7421f7a06a9540349391b

contrib/devstack/prepare_devstack.sh

@@ -9,9 +9,6 @@ INSTALLDIR=${INSTALLDIR:-/opt/stack}
 cp $NOVADOCKERDIR/contrib/devstack/lib/nova_plugins/hypervisor-docker $INSTALLDIR/devstack/lib/nova_plugins/
 
 cat - <<-EOF >> $INSTALLDIR/devstack/localrc
-RECLONE=True
-git_clone https://github.com/dims/devstack-plugin-docker /opt/stack/docker-service master
-RECLONE=False
-enable_plugin docker-service https://github.com/dims/devstack-plugin-docker
-EOF
-
+enable_plugin nova-docker https://git.openstack.org/openstack/nova-docker
+GITDIR['nova-docker']=$INSTALLDIR/nova-docker
+EOF

devstack/local.conf.sample

@@ -0,0 +1,2 @@
+[[local|localrc]]
+enable_plugin docker-service https://github.com/dims/devstack-plugin-docker

devstack/plugin.sh

@@ -0,0 +1,78 @@
+#!/bin/bash
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+# Save trace setting
+XTRACE=$(set +o | grep xtrace)
+set -o xtrace
+
+DOCKER_UNIX_SOCKET=/var/run/docker.sock
+
+# main loop
+if [[ "$1" == "stack" && "$2" == "install" ]]; then
+    echo_summary "Running stack install"
+elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
+    echo_summary "Running stack post-config"
+    wget http://get.docker.com -O install_docker.sh
+    sudo chmod 777 install_docker.sh
+    sudo sh install_docker.sh
+    sudo rm install_docker.sh
+
+    if is_fedora; then
+      install_package socat dnsmasq
+     fi
+
+    # CentOS/RedHat distros don't start the services just after the package
+    # is installed if it is not explicitily set. So the script fails on
+    # them in this killall because there is nothing to kill.
+    sudo killall docker || true
+
+    # Enable debug level logging
+    if [ -f "/etc/default/docker" ]; then
+        sudo cat /etc/default/docker
+        sudo sed -i 's/^.*DOCKER_OPTS=.*$/DOCKER_OPTS=\"--debug --storage-opt dm.override_udev_sync_check=true\"/' /etc/default/docker
+        sudo cat /etc/default/docker
+    fi
+    if [ -f "/etc/sysconfig/docker" ]; then
+        sudo cat /etc/sysconfig/docker
+        sudo sed -i 's/^.*OPTIONS=.*$/OPTIONS=--debug --selinux-enabled/' /etc/sysconfig/docker
+        sudo cat /etc/sysconfig/docker
+    fi
+    if [ -f "/usr/lib/systemd/system/docker.service" ]; then
+        sudo cat /usr/lib/systemd/system/docker.service
+        sudo sed -i 's/docker daemon/docker daemon --debug/' /usr/lib/systemd/system/docker.service
+        sudo cat /usr/lib/systemd/system/docker.service
+        sudo systemctl daemon-reload
+    fi
+
+    # Start the daemon - restart just in case the package ever auto-starts...
+    restart_service docker
+
+    echo "Waiting for docker daemon to start..."
+    DOCKER_GROUP=$(groups | cut -d' ' -f1)
+    CONFIGURE_CMD="while ! /bin/echo -e 'GET /version HTTP/1.0\n\n' | socat - unix-connect:$DOCKER_UNIX_SOCKET 2>/dev/null | grep -q '200 OK'; do
+      # Set the right group on docker unix socket before retrying
+      sudo chgrp $DOCKER_GROUP $DOCKER_UNIX_SOCKET
+      sudo chmod g+rw $DOCKER_UNIX_SOCKET
+      sleep 1
+    done"
+    if ! timeout $SERVICE_TIMEOUT sh -c "$CONFIGURE_CMD"; then
+      die $LINENO "docker did not start"
+    fi
+fi
+if [[ "$1" == "unstack" ]]; then
+    echo_summary "Running unstack"
+    stop_service docker
+fi
+
+# Restore xtrace
+$XTRACE

devstack/settings

@@ -0,0 +1,4 @@
+export VIRT_DRIVER=docker
+export DEFAULT_IMAGE_NAME=cirros
+export NON_STANDARD_REQS=1
+export IMAGE_URLS=" "