@@ -1501,6 +1501,33 @@ function load_plugin_settings {

     done

 }

+# plugin_override_defaults

+#

+# Run an extremely early setting phase for plugins that allows default

+# overriding of services.

+function plugin_override_defaults {

+    local plugins="${DEVSTACK_PLUGINS}"

+    local plugin

+

+    # short circuit if nothing to do

+    if [[ -z $plugins ]]; then

+        return

+    fi

+

+    echo "Overriding Configuration Defaults"

+    for plugin in ${plugins//,/ }; do

+        local dir=${GITDIR[$plugin]}

+        # source any overrides

+        if [[ -f $dir/devstack/override-defaults ]]; then

+            # be really verbose that an override is happening, as it

+            # may not be obvious if things fail later.

+            echo "$plugin has overriden the following defaults"

+            cat $dir/devstack/override-defaults

+            source $dir/devstack/override-defaults

+        fi

+    done

+}

+

 # run_plugins

 #

 # Run the devstack/plugin.sh in all the plugin directories. These are

@@ -1530,6 +1557,8 @@ function run_phase {

     # the source phase corresponds to settings loading in plugins

     if [[ "$mode" == "source" ]]; then

         load_plugin_settings

+    elif [[ "$mode" == "override_defaults" ]]; then

+        plugin_override_defaults

     else

         run_plugins $mode $phase

     fi

@@ -510,6 +510,10 @@ fi

 # Configure Projects

 # ==================

+# Plugin Phase 0: override_defaults - allow pluggins to override

+# defaults before other services are run

+run_phase override_defaults

+

 # Import apache functions

 source $TOP_DIR/lib/apache

@@ -45,6 +45,10 @@ fi

 # Configure Projects

 # ==================

+# Plugin Phase 0: override_defaults - allow pluggins to override

+# defaults before other services are run

+run_phase override_defaults

+

 # Import apache functions

 source $TOP_DIR/lib/apache