@@ -57,6 +57,22 @@ If the EC2 API is your cup-o-tea, you can create credentials and use euca2ools:

 You can override environment variables used in `stack.sh` by creating file name `localrc`.  It is likely that you will need to do this to tweak your networking configuration should you need to access your cloud from a different host.

+# RPC Backend

+

+Multiple RPC backends are available. Currently, this

+includes RabbitMQ (default), Qpid, and ZeroMQ. Your backend of

+choice may be selected via the `localrc`.

+

+Note that selecting more than one RPC backend will result in a failure.

+

+Example (ZeroMQ):

+

+    ENABLED_SERVICES="$ENABLED_SERVICES,-rabbit,-qpid,zeromq"

+

+Example (Qpid):

+

+    ENABLED_SERVICES="$ENABLED_SERVICES,-rabbit,-zeromq,qpid"

+

 # Swift

 Swift is not installed by default, you can enable easily by adding this to your `localrc`:

@@ -115,6 +115,8 @@ function configure_cinder() {

     if is_service_enabled qpid ; then

         iniset $CINDER_CONF DEFAULT rpc_backend cinder.openstack.common.rpc.impl_qpid

+    elif is_service_enabled zeromq; then

+        iniset $CINDER_CONF DEFAULT rpc_backend nova.openstack.common.rpc.impl_zmq

     elif [ -n "$RABBIT_HOST" ] &&  [ -n "$RABBIT_PASSWORD" ]; then

         iniset $CINDER_CONF DEFAULT rabbit_host $RABBIT_HOST

         iniset $CINDER_CONF DEFAULT rabbit_password $RABBIT_PASSWORD

@@ -142,6 +142,23 @@ if type -p screen >/dev/null && screen -ls | egrep -q "[0-9].stack"; then

     exit 1

 fi

+# Make sure we only have one rpc backend enabled.

+rpc_backend_cnt=0

+for svc in qpid zeromq rabbit; do

+    is_service_enabled $svc &&

+        ((rpc_backend_cnt++))

+done

+if [ "$rpc_backend_cnt" -gt 1 ]; then

+    echo "ERROR: only one rpc backend may be enabled,"

+    echo "       set only one of 'rabbit', 'qpid', 'zeromq'"

+    echo "       via ENABLED_SERVICES."

+elif [ "$rpc_backend_cnt" == 0 ]; then

+    echo "ERROR: at least one rpc backend must be enabled,"

+    echo "       set one of 'rabbit', 'qpid', 'zeromq'"

+    echo "       via ENABLED_SERVICES."

+fi

+unset rpc_backend_cnt

+

 # Make sure we only have one volume service enabled.

 if is_service_enabled cinder && is_service_enabled n-vol; then

     echo "ERROR: n-vol and cinder must not be enabled at the same time"

@@ -655,6 +672,12 @@ elif is_service_enabled qpid; then

     else

         install_package qpidd

     fi

+elif is_service_enabled zeromq; then

+    if [[ "$os_PACKAGE" = "rpm" ]]; then

+        install_package zeromq python-zmq

+    else

+        install_package libzmq1 python-zmq

+    fi

 fi

 if is_service_enabled mysql; then

@@ -893,8 +916,8 @@ EOF

 fi

-# Rabbit or Qpid

-# --------------

+# Finalize queue instllation

+# --------------------------

 if is_service_enabled rabbit; then

     # Start rabbitmq-server

@@ -1274,6 +1297,8 @@ if is_service_enabled quantum; then

     iniset $Q_CONF_FILE DEFAULT control_exchange quantum

     if is_service_enabled qpid ; then

         iniset $Q_CONF_FILE DEFAULT rpc_backend quantum.openstack.common.rpc.impl_qpid

+    elif is_service_enabled zeromq; then

+        iniset $Q_CONF_FILE DEFAULT rpc_backend quantum.openstack.common.rpc.impl_zmq

     elif [ -n "$RABBIT_HOST" ] &&  [ -n "$RABBIT_PASSWORD" ]; then

         iniset $Q_CONF_FILE DEFAULT rabbit_host $RABBIT_HOST

         iniset $Q_CONF_FILE DEFAULT rabbit_password $RABBIT_PASSWORD

@@ -1898,7 +1923,9 @@ add_nova_opt "vncserver_proxyclient_address=$VNCSERVER_PROXYCLIENT_ADDRESS"

 add_nova_opt "api_paste_config=$NOVA_CONF_DIR/api-paste.ini"

 add_nova_opt "image_service=nova.image.glance.GlanceImageService"

 add_nova_opt "ec2_dmz_host=$EC2_DMZ_HOST"

-if is_service_enabled qpid ; then

+if is_service_enabled zeromq; then

+    add_nova_opt "rpc_backend=nova.openstack.common.rpc.impl_zmq"

+elif is_service_enabled qpid; then

     add_nova_opt "rpc_backend=nova.rpc.impl_qpid"

 elif [ -n "$RABBIT_HOST" ] &&  [ -n "$RABBIT_PASSWORD" ]; then

     add_nova_opt "rabbit_host=$RABBIT_HOST"

@@ -2142,6 +2169,8 @@ if is_service_enabled key; then

     fi

 fi

+screen_it zeromq "cd $NOVA_DIR && $NOVA_DIR/bin/nova-rpc-zmq-receiver"

+

 # Launch the nova-api and wait for it to answer before continuing

 if is_service_enabled n-api; then

     add_nova_opt "enabled_apis=$NOVA_ENABLED_APIS"