Fixing quick startup following tutorial

broker/Dockerfile_multiarch

@@ -0,0 +1,5 @@
+FROM alpine
+ARG TARGETOS
+ARG TARGETARCH
+ADD /${TARGETOS}/${TARGETARCH}/broker  /
+CMD ["/broker"]

broker/build

@@ -29,6 +29,13 @@ case "${command}" in
                       CGO_ENABLED=0  GOOS=linux GOARCH=arm64 go build  -a -installsuffix cgo  -o broker_arm64
 		      time docker build -f Dockerfile4Armv8  -t "fogflow/broker:arm64"  .
 		      ;;
+        "multiarch")
+                      go get
+                      CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build  -a -installsuffix cgo  -o linux/amd64/broker
+                      CGO_ENABLED=0  GOOS=linux GOARCH=arm go build  -a -installsuffix cgo  -o linux/arm/broker
+                      CGO_ENABLED=0  GOOS=linux GOARCH=arm64 go build  -a -installsuffix cgo  -o linux/arm64/broker
+                      time docker buildx build --platform linux/arm,linux/arm64,linux/amd64 --push -f ./Dockerfile_multiarch -t "fogflow/broker" .
+                      ;;
 	*)
 		      echo "Command not Found."
 		      echo "usage: ./build [multistage|development|arm|arm64]"

broker/build_k8s

@@ -0,0 +1 @@
+docker buildx build --platform linux/arm,linux/arm64,linux/amd64 --push -f ./Dockerfile_multiarch -t "fogflow/broker:k8s" .

broker/ngsild.go

@@ -23,6 +23,8 @@ func (tb *ThinBroker) NGSILD_UpdateContext(w rest.ResponseWriter, r *rest.Reques
 	updateCtxReq := UpdateContextRequest{}
 	numUpdates := updateCtxReq.ReadFromNGSILD(ngsildUpsert)
 
+	// DEBUG.Println(updateCtxReq)
+
 	if numUpdates > 0 {
 		tb.handleInternalUpdateContext(&updateCtxReq)
 	}
@@ -44,6 +46,8 @@ func (tb *ThinBroker) NGSILD_CreateEntity(w rest.ResponseWriter, r *rest.Request
 	updateCtxReq := UpdateContextRequest{}
 	numUpdates := updateCtxReq.ReadFromNGSILD(ngsildUpsert)
 
+	// DEBUG.Println(updateCtxReq)
+
 	if numUpdates > 0 {
 		tb.handleInternalUpdateContext(&updateCtxReq)
 	}

broker/ngsiv1.go

@@ -3,6 +3,7 @@ package main
 import (
 	"io/ioutil"
 	"net/http"
+	"strings"
 
 	"github.com/ant0ine/go-json-rest/rest"
 	"github.com/google/uuid"
@@ -119,6 +120,8 @@ func (tb *ThinBroker) NGSIV1_SubscribeContext(w rest.ResponseWriter, r *rest.Req
 	subReq := SubscribeContextRequest{}
 	subReq.Attributes = make([]string, 0)
 
+	DEBUG.Println("Subscription request from: ", r.RemoteAddr)
+
 	err := r.DecodeJsonPayload(&subReq)
 	if err != nil {
 		rest.Error(w, err.Error(), http.StatusInternalServerError)
@@ -132,20 +135,22 @@ func (tb *ThinBroker) NGSIV1_SubscribeContext(w rest.ResponseWriter, r *rest.Req
 	}
 	subID := u1.String()
 
+	subReq.Reference = strings.TrimSpace(subReq.Reference)
+
 	// send out the response
 	subResp := SubscribeContextResponse{}
 	subResp.SubscribeResponse.SubscriptionId = subID
 	subResp.SubscribeError.SubscriptionId = subID
 	w.WriteJson(&subResp)
 
-	INFO.Println(r.Header)
+	// INFO.Println(r.Header)
 
 	// check the request header
 	subReq.Subscriber.DestinationType = r.Header.Get("Destination")
 	subReq.Subscriber.Tenant = r.Header.Get("Ngsild-Tenant")
 	subReq.Subscriber.Correlator = r.Header.Get("Fiware-Correlator")
 
-	DEBUG.Println(subReq.Subscriber)
+	// DEBUG.Println(subReq.Subscriber)
 
 	if r.Header.Get("User-Agent") == "lightweight-iot-broker" {
 		subReq.Subscriber.IsInternal = true

broker/thinBroker.go

@@ -323,6 +323,9 @@ func (tb *ThinBroker) fetchEntities(ids []EntityId, providerURL string) []Contex
 // handle context updates from external applications/devices
 
 func (tb *ThinBroker) handleInternalUpdateContext(updateCtxReq *UpdateContextRequest) {
+
+	// DEBUG.Println("updateCtxReq", updateCtxReq)
+
 	switch strings.ToUpper(updateCtxReq.UpdateAction) {
 	case "UPDATE":
 		for _, ctxElem := range updateCtxReq.ContextElements {
@@ -388,6 +391,9 @@ func (tb *ThinBroker) queryOwnerOfEntity(eid string) string {
 }
 
 func (tb *ThinBroker) UpdateContext2LocalSite(ctxElem *ContextElement, correlator string, params ...rest.ResponseWriter) {
+
+	// DEBUG.Println("elements", ctxElem)
+
 	// register the entity if there is any changes on attribute list, domain metadata
 	tb.entities_lock.Lock()
 	eid := ctxElem.Entity.ID
@@ -402,13 +408,13 @@ func (tb *ThinBroker) UpdateContext2LocalSite(ctxElem *ContextElement, correlato
 	tb.updateContextElement(ctxElem)
 
 	// propogate this update to its subscribers
-	go tb.notifySubscribers(ctxElem, correlator, true)
+	tb.notifySubscribers(ctxElem, correlator, true)
 }
 
 func (tb *ThinBroker) UpdateContext2RemoteSite(ctxElem *ContextElement, updateAction string, brokerURL string) {
 	switch updateAction {
 	case "UPDATE":
-		INFO.Println(brokerURL)
+		// INFO.Println(brokerURL)
 		client := NGSI10Client{IoTBrokerURL: brokerURL, SecurityCfg: tb.SecurityCfg}
 		client.UpdateContext(ctxElem)
 
@@ -421,7 +427,7 @@ func (tb *ThinBroker) UpdateContext2RemoteSite(ctxElem *ContextElement, updateAc
 func (tb *ThinBroker) notifySubscribers(ctxElem *ContextElement, correlator string, checkSelectedAttributes bool) {
 	eid := ctxElem.Entity.ID
 
-	//DEBUG.Println(ctxElem)
+	// DEBUG.Println("elements", ctxElem)
 
 	tb.e2sub_lock.RLock()
 	defer tb.e2sub_lock.RUnlock()
@@ -468,6 +474,7 @@ func (tb *ThinBroker) notifySubscribers(ctxElem *ContextElement, correlator stri
 			elements = append(elements, *ctxElem)
 		}
 
+		// DEBUG.Println("elements", elements)
 		go tb.sendReliableNotify(elements, sid)
 	}
 }
@@ -535,11 +542,13 @@ func (tb *ThinBroker) sendReliableNotifyToSubscriber(elements []ContextElement,
 	}
 	tb.subscriptions_lock.Unlock()
 
-	INFO.Println("NOTIFY: ", len(elements), ", ", sid, ", ", subscriberURL, ", ", DestinationBroker)
+	//INFO.Println("NOTIFY: ", len(elements), ", ", sid, ", ", subscriberURL, ", ", DestinationBroker)
+	// DEBUG.Println(elements)
 
 	err := postNotifyContext(elements, sid, subscriberURL, DestinationBroker, Tenant, tb.SecurityCfg)
+
 	if err != nil {
-		INFO.Println("NOTIFY is not received by the subscriber, ", subscriberURL)
+		DEBUG.Println("NOTIFY is not received by the subscriber, ", subscriberURL)
 
 		tb.subscriptions_lock.Lock()
 		if subscription, exist := tb.subscriptions[sid]; exist {
@@ -561,6 +570,7 @@ func (tb *ThinBroker) sendReliableNotifyToSubscriber(elements []ContextElement,
 */
 
 func (tb *ThinBroker) sendReliableNotify(elements []ContextElement, sid string) {
+	// DEBUG.Println(elements)
 	tb.subscriptions_lock.Lock()
 	_, ok := tb.subscriptions[sid]
 	if ok == true {
@@ -683,9 +693,9 @@ func (tb *ThinBroker) handleNGSI9Notify(mainSubID string, notifyContextAvailabil
 			tb.e2sub_lock.Unlock()
 		}
 
-		INFO.Println(registration.ProvidingApplication, ", ", tb.MyURL)
-		INFO.Println("TO ngsi10 subscription, ", mainSubID)
-		INFO.Printf("entity list: %+v\r\n", registration.EntityIdList)
+		// INFO.Println(registration.ProvidingApplication, ", ", tb.MyURL)
+		// INFO.Println("TO ngsi10 subscription, ", mainSubID)
+		// INFO.Printf("entity list: %+v\r\n", registration.EntityIdList)
 
 		if registration.ProvidingApplication == tb.MyURL {
 			//for matched entities provided by myself
@@ -702,7 +712,7 @@ func (tb *ThinBroker) handleNGSI9Notify(mainSubID string, notifyContextAvailabil
 			if action == "CREATE" || action == "UPDATE" {
 				sid, err := subscribeContextProvider(&newSubscription, registration.ProvidingApplication, tb.SecurityCfg)
 				if err == nil {
-					INFO.Println("issue a new subscription ", sid)
+					// INFO.Println("issue a new subscription ", sid)
 
 					tb.subscriptions_lock.Lock()
 					tb.subscriptions[sid] = &newSubscription

broker/utils.go

@@ -14,7 +14,8 @@ import (
 )
 
 func postNotifyContext(ctxElems []ContextElement, subscriptionId string, URL string, DestinationBrokerType string, tenant string, httpsCfg *HTTPS) error {
-	INFO.Println("destination protocol: ", DestinationBrokerType)
+	//INFO.Println("destination protocol: ", DestinationBrokerType)
+	// INFO.Println("ctxElems: ", ctxElems)
 
 	switch DestinationBrokerType {
 	case "NGSI-LD":
@@ -28,7 +29,7 @@ func postNotifyContext(ctxElems []ContextElement, subscriptionId string, URL str
 
 // for ngsiv1 consumer
 func postNGSIV1NotifyContext(ctxElems []ContextElement, subscriptionId string, URL string, httpsCfg *HTTPS) error {
-	INFO.Println("NGSIv1 NOTIFY: ", URL)
+	// INFO.Println("NGSIv1 NOTIFY: ", URL)
 
 	payload := toNGSIv1Payload(ctxElems)
 
@@ -95,7 +96,7 @@ func postNGSIV2NotifyContext(ctxElems []ContextElement, subscriptionId string, U
 		return err
 	}
 
-	INFO.Println(string(body))
+	// INFO.Println(string(body))
 
 	req, err := http.NewRequest("POST", URL, bytes.NewBuffer(body))
 	req.Header.Add("Content-Type", "application/json")
@@ -164,7 +165,8 @@ func toNGSIv2Payload(ctxElems []ContextElement) []map[string]interface{} {
 
 // for NGSI-LD consumer
 func postNGSILDUpsert(ctxElems []ContextElement, subscriptionId string, URL string, tenant string) error {
-	INFO.Println("NGSI-LD NOTIFY: ", URL)
+	//INFO.Println("NGSI-LD NOTIFY: ", URL)
+	// DEBUG.Println(ctxElems)
 
 	payload := toNGSILDPayload(ctxElems)
 
@@ -233,6 +235,9 @@ func toNGSILDPayload(ctxElems []ContextElement) []map[string]interface{} {
 			default:
 				propertyValue["type"] = "Property"
 				propertyValue["value"] = attr.Value
+				for _, metadata := range attr.Metadata {
+					propertyValue[metadata.Name] = metadata.Value
+				}
 			}
 
 			element[attr.Name] = propertyValue

common/config/config.go

@@ -52,9 +52,11 @@ type Config struct {
 		Debug    string `json:"debug"`
 	} `json:"logging"`
 	Discovery struct {
-		HostIP    string `json:"host_ip"`
-		HTTPPort  int    `json:"http_port"`
-		HTTPSPort int    `json:"https_port"`
+		HostIP           string `json:"host_ip"`
+		HTTPPort         int    `json:"http_port"`
+		HTTPSPort        int    `json:"https_port"`
+		StoreOnDisk      bool   `json:"storeOnDisk"`
+		DelayStoreOnFile int    `json:"delayStoreOnFile"`
 	} `json:"discovery"`
 	Broker struct {
 		HostIP            string `json:"host_ip"`
@@ -63,25 +65,27 @@ type Config struct {
 		HeartbeatInterval int    `json:"heartbeat_interval"`
 	} `json:"broker"`
 	Master struct {
-		HostIP      string `json:"host_ip"`
-		AgentPort   int    `json:"ngsi_agent_port"`
-		RESTAPIPort int    `json:"rest_api_port"`
+		HostIP                    string `json:"host_ip"`
+		AgentPort                 int    `json:"ngsi_agent_port"`
+		RESTAPIPort               int    `json:"rest_api_port"`
+		InfiniteReconnectionTries bool   `json:"infinite_reconnection_tries"`
 	} `json:"master"`
 	Designer struct {
 		HostIP     string `json:"host_ip"`
 		WebSrvPort int    `json:"webSrvPort"`
 		HTTPSPort  int    `json:"https_webSrvPort"`
 	} `json:"designer"`
 	Worker struct {
-		ContainerManagement string                `json:"container_management"`
-		AppNameSpace        string                `json:"app_namespace"`
-		EdgeControllerPort  int                   `json:"edge_controller_port"`
-		Registry            RegistryConfiguration `json:"registry,omitempty"`
-		ContainerAutoRemove bool                  `json:"container_autoremove"`
-		StartActualTask     bool                  `json:"start_actual_task"`
-		Capacity            int                   `json:"capacity"`
-		HeartbeatInterval   int                   `json:"heartbeat_interval"`
-		DetectionDuration   int                   `json:"detection_duration"`
+		ContainerManagement       string                `json:"container_management"`
+		AppNameSpace              string                `json:"app_namespace"`
+		EdgeControllerPort        int                   `json:"edge_controller_port"`
+		Registry                  RegistryConfiguration `json:"registry,omitempty"`
+		ContainerAutoRemove       bool                  `json:"container_autoremove"`
+		StartActualTask           bool                  `json:"start_actual_task"`
+		Capacity                  int                   `json:"capacity"`
+		HeartbeatInterval         int                   `json:"heartbeat_interval"`
+		DetectionDuration         int                   `json:"detection_duration"`
+		InfiniteReconnectionTries bool                  `json:"infinite_reconnection_tries"`
 	} `json:"worker"`
 	RabbitMQ struct {
 		HostIP   string `json:"host_ip"`

common/ngsi/ngsi.go

@@ -436,6 +436,26 @@ func (ce *ContextElement) ReadFromNGSILD(ngsildEntity map[string]interface{}) bo
 
 				newCtxAttribute.Value = attrValue
 
+				// dateObserved, dateObservedExist := attribute["dateObserved"]
+				// if dateObservedExist {
+				// 	newCtxMedata := ContextMetadata{}
+				// 	newCtxMedata.Name = "dateObserved"
+				// 	newCtxMedata.Type = "dateObserved"
+				// 	newCtxMedata.Value = dateObserved
+				// 	newCtxAttribute.Metadata = append(newCtxAttribute.Metadata, newCtxMedata)
+				// }
+
+				for key, element := range attribute {
+					if strings.ToLower(key) != "type" && strings.ToLower(key) != "value" {
+						newCtxMedata := ContextMetadata{}
+						newCtxMedata.Name = key
+						newCtxMedata.Type = key
+						newCtxMedata.Value = element
+						newCtxAttribute.Metadata = append(newCtxAttribute.Metadata, newCtxMedata)
+					}
+					//fmt.Println("Key:", key, "=>", "Element:", element)
+				}
+
 				ce.Attributes = append(ce.Attributes, newCtxAttribute)
 			} else if strings.ToLower(attrType) == "relationship" {
 				refObject := attribute["object"]

common/ngsi/ngsiclient.go

@@ -556,6 +556,8 @@ func (nc *NGSI9Client) DiscoverContextAvailability(discoverCtxAvailabilityReq *D
 		return nil, err
 	}
 
+	// DEBUG.Printf("Discovery request to %s: %s", nc.IoTDiscoveryURL+"/discoverContextAvailability", string(body))
+
 	req, err := http.NewRequest("POST", nc.IoTDiscoveryURL+"/discoverContextAvailability", bytes.NewBuffer(body))
 	if err != nil {
 		return nil, err

designer/build_k8s

@@ -0,0 +1 @@
+docker image tag fogflow/designer:latest  fogflow/designer:k8s

designer/config.json

@@ -28,7 +28,8 @@
     },
     "designer": {
         "webSrvPort": 8080,
-        "agentPort": 1030               
+        "agentPort": 1030,
+	"notRecreateSubscriptions": false
     },    
     "rabbitmq": {
         "port": 5672,