add first draft 0mq plugin

devstack/plugin.sh

@@ -0,0 +1,122 @@
+#!/bin/bash
+#
+# Copyright 2015 Hewlett-Packard Development Company, L.P.
+#
+# 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.
+
+function install_zeromq {
+    if is_fedora; then
+        install_package zeromq python-zmq
+        if [ "$ZEROMQ_MATCHMAKER" == "redis" ]; then
+            install_package redis python-redis
+        fi
+    elif is_ubuntu; then
+        install_package libzmq1 python-zmq
+        if [ "$ZEROMQ_MATCHMAKER" == "redis" ]; then
+            install_package redis-server python-redis
+        fi
+    elif is_suse; then
+        install_package libzmq1 python-pyzmq
+        if [ "$ZEROMQ_MATCHMAKER" == "redis" ]; then
+            install_package redis python-redis
+        fi
+    else
+        exit_distro_not_supported "zeromq installation"
+    fi
+    # Necessary directory for socket location.
+    sudo mkdir -p /var/run/openstack
+    sudo chown $STACK_USER /var/run/openstack
+}
+
+function uninstall_zeromq {
+    if is_fedora; then
+        uninstall_package zeromq python-zmq
+        if [ "$ZEROMQ_MATCHMAKER" == "redis" ]; then
+            uninstall_package redis python-redis
+        fi
+    elif is_ubuntu; then
+        uninstall_package libzmq1 python-zmq
+        if [ "$ZEROMQ_MATCHMAKER" == "redis" ]; then
+            uninstall_package redis-server python-redis
+        fi
+    elif is_suse; then
+        uninstall_package libzmq1 python-pyzmq
+        if [ "$ZEROMQ_MATCHMAKER" == "redis" ]; then
+            uninstall_package redis python-redis
+        fi
+    else
+        exit_distro_not_supported "zeromq installation"
+    fi
+}
+
+function start_zeromq {
+    echo_summary "Starting zeromq receiver"
+    run_process zeromq "$OSLO_BIN_DIR/oslo-messaging-zmq-receiver"
+}
+
+function iniset_zeromq_backend {
+    local package=$1
+    local file=$2
+    local section=${3:-DEFAULT}
+
+    iniset $file $section rpc_backend "zmq"
+    iniset $file $section rpc_zmq_host `hostname`
+    if [ "$ZEROMQ_MATCHMAKER" == "redis" ]; then
+        iniset $file $section rpc_zmq_matchmaker "redis"
+        MATCHMAKER_REDIS_HOST=${MATCHMAKER_REDIS_HOST:-127.0.0.1}
+        iniset $file matchmaker_redis host $MATCHMAKER_REDIS_HOST
+    else
+        die $LINENO "Other matchmaker drivers not supported"
+    fi
+}
+
+# Note: this is the only tricky part about out of tree rpc plugins,
+# you must overwrite the iniset_rpc_backend function so that when
+# that's passed around the correct settings files are made.
+if is_service_enabled 0mq; then
+    function iniset_rpc_backend {
+        iniset_zeromq_backend $@
+    }
+    export -f iniset_rpc_backend
+fi
+
+# check for service enabled
+if is_service_enabled 0mq; then
+    if [[ "$1" == "stack" && "$2" == "pre-install" ]]; then
+        # nothing needed here
+        :
+
+    elif [[ "$1" == "stack" && "$2" == "install" ]]; then
+        # Installs and configures zeromq
+        echo_summary "Installing zeromq"
+        install_zeromq
+
+    elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
+        # Start zeromq process, this happens before any services start
+        start_zeromq
+
+    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
+        :
+    fi
+
+    if [[ "$1" == "unstack" ]]; then
+        :
+    fi
+
+    if [[ "$1" == "clean" ]]; then
+        # Remove state and transient data
+        # Remember clean.sh first calls unstack.sh
+        # no-op
+        uninstal_zeromq
+    fi
+fi

devstack/settings

@@ -0,0 +1,3 @@
+enable_service 0mq
+disable_service rabbit
+ZEROMQ_MATCHMAKER=${ZEROMQ_MATCHMAKER:-"redis"}