| # Ryu OpenFlow Controller | 
 | # ----------------------- | 
 |  | 
 | # Save trace setting | 
 | MY_XTRACE=$(set +o | grep xtrace) | 
 | set +o xtrace | 
 |  | 
 |  | 
 | RYU_DIR=$DEST/ryu | 
 | # Ryu API Host | 
 | RYU_API_HOST=${RYU_API_HOST:-127.0.0.1} | 
 | # Ryu API Port | 
 | RYU_API_PORT=${RYU_API_PORT:-8080} | 
 | # Ryu OFP Host | 
 | RYU_OFP_HOST=${RYU_OFP_HOST:-127.0.0.1} | 
 | # Ryu OFP Port | 
 | RYU_OFP_PORT=${RYU_OFP_PORT:-6633} | 
 | # Ryu Applications | 
 | RYU_APPS=${RYU_APPS:-ryu.app.simple_isolation,ryu.app.rest} | 
 |  | 
 | # configure_ryu can be called multiple times as neutron_pluing/ryu may call | 
 | # this function for neutron-ryu-agent | 
 | _RYU_CONFIGURED=${_RYU_CONFIGURED:-False} | 
 | function configure_ryu() { | 
 |     if [[ "$_RYU_CONFIGURED" == "False" ]]; then | 
 |         setup_develop $RYU_DIR | 
 |         _RYU_CONFIGURED=True | 
 |     fi | 
 | } | 
 |  | 
 | function init_ryu() { | 
 |     RYU_CONF_DIR=/etc/ryu | 
 |     if [[ ! -d $RYU_CONF_DIR ]]; then | 
 |         sudo mkdir -p $RYU_CONF_DIR | 
 |     fi | 
 |     sudo chown $STACK_USER $RYU_CONF_DIR | 
 |     RYU_CONF=$RYU_CONF_DIR/ryu.conf | 
 |     sudo rm -rf $RYU_CONF | 
 |  | 
 |     # Ryu configuration | 
 |     RYU_CONF_CONTENTS=${RYU_CONF_CONTENTS:-"[DEFAULT] | 
 | app_lists=$RYU_APPS | 
 | wsapi_host=$RYU_API_HOST | 
 | wsapi_port=$RYU_API_PORT | 
 | ofp_listen_host=$RYU_OFP_HOST | 
 | ofp_tcp_listen_port=$RYU_OFP_PORT | 
 | neutron_url=http://$Q_HOST:$Q_PORT | 
 | neutron_admin_username=$Q_ADMIN_USERNAME | 
 | neutron_admin_password=$SERVICE_PASSWORD | 
 | neutron_admin_tenant_name=$SERVICE_TENANT_NAME | 
 | neutron_admin_auth_url=$KEYSTONE_SERVICE_PROTOCOL://$KEYSTONE_SERVICE_HOST:$KEYSTONE_AUTH_PORT/v2.0 | 
 | neutron_auth_strategy=$Q_AUTH_STRATEGY | 
 | neutron_controller_addr=tcp:$RYU_OFP_HOST:$RYU_OFP_PORT | 
 | "} | 
 |     echo "${RYU_CONF_CONTENTS}" > $RYU_CONF | 
 | } | 
 |  | 
 | # install_ryu can be called multiple times as neutron_pluing/ryu may call | 
 | # this function for neutron-ryu-agent | 
 | # Make this function idempotent and avoid cloning same repo many times | 
 | # with RECLONE=yes | 
 | _RYU_INSTALLED=${_RYU_INSTALLED:-False} | 
 | function install_ryu() { | 
 |     if [[ "$_RYU_INSTALLED" == "False" ]]; then | 
 |         git_clone $RYU_REPO $RYU_DIR $RYU_BRANCH | 
 |         _RYU_INSTALLED=True | 
 |     fi | 
 | } | 
 |  | 
 | function start_ryu() { | 
 |     screen_it ryu "cd $RYU_DIR && $RYU_DIR/bin/ryu-manager --config-file $RYU_CONF" | 
 | } | 
 |  | 
 | function stop_ryu() { | 
 |     : | 
 | } | 
 |  | 
 | # Restore xtrace | 
 | $MY_XTRACE |