Implements blueprint quantum-lbaas-plugin-support

Add support for quantum lbaas plugin.
Configure service_plugins and lbaas agent
in case q-lbaas service is enabled in localrc

Change-Id: Iebaa1ed6a7209175504230faf802a94dc841392f

lib/quantum

@@ -176,6 +176,11 @@ fi
 # Please refer to lib/quantum_plugins/README.md for details.
 source $TOP_DIR/lib/quantum_plugins/$Q_PLUGIN
 
+# Agent loadbalancer service plugin functions
+# -------------------------------------------
+# Hardcoding for 1 service plugin for now
+source $TOP_DIR/lib/quantum_plugins/agent_loadbalancer
+
 # Entry Points
 # ------------
 
@@ -185,6 +190,10 @@ function configure_quantum() {
     _configure_quantum_common
     iniset_rpc_backend quantum $QUANTUM_CONF DEFAULT
 
+    # goes before q-svc to init Q_SERVICE_PLUGIN_CLASSES
+    if is_service_enabled q-lbaas; then
+        _configure_quantum_lbaas
+    fi
     if is_service_enabled q-svc; then
         _configure_quantum_service
     fi
@@ -362,6 +371,10 @@ function start_quantum_agents() {
     screen_it q-dhcp "python $AGENT_DHCP_BINARY --config-file $QUANTUM_CONF --config-file=$Q_DHCP_CONF_FILE"
     screen_it q-meta "python $AGENT_META_BINARY --config-file $QUANTUM_CONF --config-file=$Q_META_CONF_FILE"
     screen_it q-l3 "python $AGENT_L3_BINARY --config-file $QUANTUM_CONF --config-file=$Q_L3_CONF_FILE"
+
+    if is_service_enabled q-lbaas; then
+        screen_it q-lbaas "python $AGENT_LBAAS_BINARY --config-file $QUANTUM_CONF --config-file=$LBAAS_AGENT_CONF_FILENAME"
+    fi
 }
 
 # stop_quantum() - Stop running processes (non-screen)
@@ -483,6 +496,13 @@ function _configure_quantum_metadata_agent() {
     _quantum_setup_keystone $Q_META_CONF_FILE DEFAULT set_auth_url
 }
 
+function _configure_quantum_lbaas()
+{
+    quantum_agent_lbaas_install_agent_packages
+    quantum_agent_lbaas_configure_common
+    quantum_agent_lbaas_configure_agent
+}
+
 # _configure_quantum_plugin_agent() - Set config files for quantum plugin agent
 # It is called when q-agt is enabled.
 function _configure_quantum_plugin_agent() {
@@ -512,6 +532,10 @@ function _configure_quantum_service() {
     # Update either configuration file with plugin
     iniset $QUANTUM_CONF DEFAULT core_plugin $Q_PLUGIN_CLASS
 
+    if [[ $Q_SERVICE_PLUGIN_CLASSES != '' ]]; then
+        iniset $QUANTUM_CONF DEFAULT service_plugins $Q_SERVICE_PLUGIN_CLASSES
+    fi
+
     iniset $QUANTUM_CONF DEFAULT verbose True
     iniset $QUANTUM_CONF DEFAULT debug True
     iniset $QUANTUM_CONF DEFAULT state_path $DATA_DIR/quantum

lib/quantum_plugins/agent_loadbalancer

@@ -0,0 +1,45 @@
+# Quantum loadbalancer plugin
+# ---------------------------
+
+# Save trace setting
+MY_XTRACE=$(set +o | grep xtrace)
+set +o xtrace
+
+
+AGENT_LBAAS_BINARY="$QUANTUM_DIR/bin/quantum-lbaas-agent"
+
+function quantum_agent_lbaas_install_agent_packages() {
+    if is_ubuntu || is_fedora; then
+        install_package haproxy
+    fi
+}
+
+function quantum_agent_lbaas_configure_common() {
+    if [[ $Q_SERVICE_PLUGIN_CLASSES == '' ]]; then
+        Q_SERVICE_PLUGIN_CLASSES="quantum.plugins.services.agent_loadbalancer.plugin.LoadBalancerPlugin"
+    else
+        Q_SERVICE_PLUGIN_CLASSES="$Q_SERVICE_PLUGIN_CLASSES,quantum.plugins.services.agent_loadbalancer.plugin.LoadBalancerPlugin"
+    fi
+}
+
+function quantum_agent_lbaas_configure_agent() {
+    LBAAS_AGENT_CONF_PATH=/etc/quantum/plugins/services/agent_loadbalancer
+    mkdir -p $LBAAS_AGENT_CONF_PATH
+
+    LBAAS_AGENT_CONF_FILENAME="$LBAAS_AGENT_CONF_PATH/lbaas_agent.ini"
+
+    cp $QUANTUM_DIR/etc/lbaas_agent.ini /$LBAAS_AGENT_CONF_FILENAME
+
+    if [[ $Q_PLUGIN == 'linuxbridge' || $Q_PLUGIN == 'brocade' ]]; then
+        iniset $LBAAS_AGENT_CONF_FILENAME DEFAULT interface_driver "quantum.agent.linux.interface.BridgeInterfaceDriver"
+    else
+        iniset $LBAAS_AGENT_CONF_FILENAME DEFAULT interface_driver "quantum.agent.linux.interface.OVSInterfaceDriver"
+    fi
+
+    if is_fedora; then
+        iniset $LBAAS_AGENT_CONF_FILENAME DEFAULT user_group "nobody"
+    fi
+}
+
+# Restore xtrace
+$MY_XTRACE