Add ports configs for SNMP transport to Docker scripts

common/transport/snmp/src/main/java/org/thingsboard/server/transport/snmp/service/SnmpTransportService.java

@@ -302,8 +302,8 @@ public class SnmpTransportService implements TbTransportService, CommandResponde
     *
     * TODO: add check for host uniqueness when saving device (for backward compatibility - only for the ones using from-device RPC requests)
     *
-    * TODO: this won't work properly in a cluster mode, due to load-balancing of requests from devices:
-    *  session might not be on this instance
+    * NOTE: SNMP TRAPs support won't work properly when there is more than one SNMP transport,
+    *  due to load-balancing of requests from devices: session might not be on this instance
     * */
     @Override
     public void processPdu(CommandResponderEvent event) {

docker/docker-compose.yml

@@ -235,6 +235,8 @@ services:
   tb-snmp-transport:
     restart: always
     image: "${DOCKER_REPO}/${SNMP_TRANSPORT_DOCKER_NAME}:${TB_VERSION}"
+    ports:
+      - "1620:1620/udp"
     environment:
       TB_SERVICE_ID: tb-snmp-transport
       JAVA_OPTS: "${JAVA_OPTS}"

docker/tb-snmp-transport.env

@@ -1,6 +1,7 @@
 ZOOKEEPER_ENABLED=true
 ZOOKEEPER_URL=zookeeper:2181
 
+SNMP_BIND_PORT=1620
 METRICS_ENABLED=true
 METRICS_ENDPOINTS_EXPOSE=prometheus
 WEB_APPLICATION_ENABLE=true