start VILLASnode services and use frontend to proxy WebSocket endpoint

Dockerfile

@@ -1,10 +1,10 @@
-FROM node:latest
+FROM nginx:stable-alpine
 
-RUN mkdir /react
-RUN mkdir /result
+# Copy frontend files and make them accesible to nginx
+RUN mkdir /www
+COPY build /www
+RUN chown nginx:nginx -R /www
+RUN chmod -R 0755 /www
 
-VOLUME /result
-
-WORKDIR /react
-
-CMD npm install && npm run build && cp -R /react/build/* /result/
+# Copy nginx configuration
+COPY etc/nginx/villas.conf /etc/nginx/conf.d/default.conf

VILLASweb-backend

@@ -1 +0,0 @@
-Subproject commit 8184b91f013f25887a129fd95354da3cc5796244

docker-compose.yml

@@ -4,31 +4,35 @@ volumes:
   database:
     driver: local
 
+networks:
+  villas:
+
 services:
+  # The VILLASweb frontend
   frontend:
     build: 
       context: .
-      dockerfile: nginx/Dockerfile
-    links:
-      - backend
     environment:
       - REACT_APP_HTTP_PROXY
     ports:
       - "80:80"
       - "443:443"
     restart: always
+    networks:
+      villas:
 
+  # The VILLASweb backend
   backend:
     build: backend
-    links:
-      - database
-      - broker
     environment:
       - NODE_ENV=production
     ports:
       - "4000:4000"
     restart: always
+    networks:
+      villas:
 
+  # The MongoDB database for the VILLASweb backend
   database:
     image: mongo:latest
     user: mongodb
@@ -36,7 +40,10 @@ services:
       - database:/data/db
     restart: always
     user: mongodb
+    networks:
+      villas:
 
+  # AMQP broker for VILLAScontroller
   broker:
     image: rabbitmq:management
     environment:
@@ -44,4 +51,32 @@ services:
       - RABBITMQ_DEFAULT_PASS=s3c0sim4!
     ports:
       - "8080:15672"
-      - "5672:5672"
+      - "5672:5672"
+    networks:
+      villas:
+
+  # VILLASnode, the gateway between UDP and WebSocket traffic
+  node:
+    image: villas/node:latest
+    privileged: true
+    command: [ "node", "/etc/villas/node/websocket.conf" ]
+    expose:
+      - "12000/udp"
+    ports:
+      - "8081:80/tcp"
+    volumes:
+      - "./etc/node/:/etc/villas/node/"
+    networks:
+      villas:
+
+  # Generate random data and send it via UDP to the 'node' service
+  signal:
+    image: villas/node:latest
+    privileged: true
+    entrypoint: bash
+    command: [ "-c", "villas signal mixed -v4 | villas pipe -x /etc/villas/node/websocket.conf udp_1"]
+    volumes:
+      - "./etc/node/:/etc/villas/node/"
+    stop_signal: SIGINT
+    networks:
+      villas:

etc/nginx/villas.conf

@@ -13,6 +13,13 @@ server {
 
     proxy_pass http://backend:4000/;
   }
+  
+  location /ws/ {
+    proxy_pass http://node/;
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
+  }
 
   # frontend location
   location / {

etc/node/websocket.conf

@@ -0,0 +1,57 @@
+/** Example configuration file for VILLASnode.
+ *
+ * The syntax of this file is similar to JSON.
+ * A detailed description of the format can be found here:
+ *   http://www.hyperrealm.com/libconfig/libconfig_manual.html#Configuration-Files
+ *
+ * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
+ * @copyright 2017, Institute for Automation of Complex Power Systems, EONERC
+ * @license GNU General Public License (version 3)
+ *
+ * VILLASnode
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *********************************************************************************/
+
+nodes = {
+	ws_1 = {
+		type = "websocket",
+		description = "Demo Channel",
+		#vectorize = 10,
+		source = {
+			simulator = "OP5600",
+			location = "ACS lab"
+		},
+		series = (
+			{ label = "Random walk", unit = "V" },
+			{ label = "Sine",        unit = "A" },
+			{ label = "Rect",        unit = "Var"},
+			{ label = "Ramp",        unit = "°C" }
+		)
+  },
+  udp_1 = {
+    type = "socket",
+    layer = "udp",
+    
+    remote = "signal:12001"
+    local = "node:12000"
+  },
+};
+
+
+############       List of paths       ############
+
+paths = (
+	{ in = "udp_1", out = "ws_1", reverse = true }
+);

nginx/Dockerfile

@@ -1,10 +0,0 @@
-FROM nginx:stable-alpine
-
-# Copy frontend files and make them accesible to nginx
-RUN mkdir /www
-COPY build /www
-RUN chown nginx:nginx -R /www
-RUN chmod -R 0755 /www
-
-# Copy nginx configuration
-COPY nginx/villas.conf /etc/nginx/conf.d/default.conf