implement kafka

Author: rajsinghtech

examples/kustomization/config.json

@@ -14,10 +14,14 @@
   "records": {
     "alerts": ["logger"],
     "errors": ["logger"],
-    "V": ["logger"]
+    "V": ["logger", "kafka"]
   },
   "tls": {
     "server_cert": "/etc/ssl/certs/tls.crt",
     "server_key": "/etc/ssl/certs/tls.key"
+  },
+  "kafka": {
+    "bootstrap.servers": "tesla-kafka-brokers.tesla.svc.cluster.local:9092",
+    "queue.buffering.max.messages": 1000000
   }
-}
+}

examples/kustomization/kafka.yaml

@@ -0,0 +1,49 @@
+apiVersion: kafka.strimzi.io/v1beta2
+kind: Kafka
+metadata:
+  name: tesla
+spec:
+  kafka:
+    resources:
+      requests:
+        memory: 212Mi
+        cpu: "500m"
+      limits:
+        memory: 1512Mi
+        cpu: "2"
+    version: 3.8.0
+    replicas: 3
+    listeners:
+      - name: plain
+        port: 9092
+        type: internal
+        tls: false
+      - name: tls
+        port: 9093
+        type: internal
+        tls: true
+    config:
+      offsets.topic.replication.factor: 3
+      transaction.state.log.replication.factor: 3
+      transaction.state.log.min.isr: 2
+      default.replication.factor: 3
+      min.insync.replicas: 2
+      inter.broker.protocol.version: "3.8"
+    storage:
+      type: jbod
+      volumes:
+        - id: 0
+          type: persistent-claim
+          size: 20Gi
+          class: ceph-block-replicated-nvme
+          deleteClaim: true
+  zookeeper:
+    replicas: 3
+    storage:
+      type: persistent-claim
+      size: 20Gi
+      class: ceph-block-replicated-nvme
+      deleteClaim: true
+  entityOperator:
+    topicOperator: {}
+    userOperator: {}

examples/kustomization/kustomization.yaml

@@ -9,6 +9,7 @@ resources:
   - public-key-webserver.yaml
   - pg.yaml
   - fleet-telemetry-consumer.yaml
+  - kafka.yaml
 configMapGenerator:
   - name: fleet-telemetry-config
     files:

go.mod

@@ -1,14 +1,19 @@
 module fleet-telemetry-consumer
 
-go 1.21
+go 1.23
+
+toolchain go1.23.5
 
 require (
 	github.com/gofiber/fiber/v2 v2.52.0
 	github.com/gofiber/template/html/v2 v2.1.0
-	gorm.io/driver/postgres v1.5.6
-	gorm.io/gorm v1.25.7
+	github.com/teslamotors/fleet-telemetry v0.6.0
+	gorm.io/driver/postgres v1.5.4
+	gorm.io/gorm v1.25.5
 )
 
+require github.com/confluentinc/confluent-kafka-go/v2 v2.3.0
+
 require (
 	github.com/andybalholm/brotli v1.0.5 // indirect
 	github.com/gofiber/template v1.8.2 // indirect
@@ -28,6 +33,7 @@ require (
 	github.com/valyala/fasthttp v1.51.0 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect
 	golang.org/x/crypto v0.14.0 // indirect
-	golang.org/x/sys v0.15.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
+	golang.org/x/sys v0.22.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
+	google.golang.org/protobuf v1.36.4 // indirect
 )

go.sum

@@ -1,8 +1,30 @@
+github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
+github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
+github.com/Microsoft/go-winio v0.5.2 h1:a9IhgEQBCUEk6QCdml9CiJGhAws+YwffDHEMp1VMrpA=
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@@ -11,6 +33,14 @@ github.com/gofiber/template/html/v2 v2.1.0 h1:FjwzqhhdJpnhyCvav60Z1ytnBqOUr5sGO/
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+github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
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@@ -25,41 +55,77 @@ github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
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+google.golang.org/protobuf v1.35.1 h1:m3LfL6/Ca+fqnjnlqQXNpFPABW1UD7mjh8KO2mKFytA=
+google.golang.org/protobuf v1.35.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
+google.golang.org/protobuf v1.36.4 h1:6A3ZDJHn/eNqc1i+IdefRzy/9PokBTPvcqMySR7NNIM=
+google.golang.org/protobuf v1.36.4/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gorm.io/driver/postgres v1.5.6 h1:ydr9xEd5YAM0vxVDY0X139dyzNz10spDiDlC7+ibLeU=
-gorm.io/driver/postgres v1.5.6/go.mod h1:3e019WlBaYI5o5LIdNV+LyxCMNtLOQETBXL2h4chKpA=
-gorm.io/gorm v1.25.7 h1:VsD6acwRjz2zFxGO50gPO6AkNs7KKnvfzUjHQhZDz/A=
-gorm.io/gorm v1.25.7/go.mod h1:hbnx/Oo0ChWMn1BIhpy1oYozzpM15i4YPuHDmfYtwg8=
+gorm.io/driver/postgres v1.5.4 h1:Iyrp9Meh3GmbSuyIAGyjkN+n9K+GHX9b9MqsTL4EJCo=
+gorm.io/driver/postgres v1.5.4/go.mod h1:Bgo89+h0CRcdA33Y6frlaHHVuTdOf87pmyzwW9C/BH0=
+gorm.io/gorm v1.25.5 h1:zR9lOiiYf09VNh5Q1gphfyia1JpiClIWG9hQaxB/mls=
+gorm.io/gorm v1.25.5/go.mod h1:hbnx/Oo0ChWMn1BIhpy1oYozzpM15i4YPuHDmfYtwg8=

main.go

@@ -16,6 +16,7 @@ import (
 
 	"fleet-telemetry-consumer/db"
 	"fleet-telemetry-consumer/models"
+	"fleet-telemetry-consumer/telemetry"
 
 	"github.com/gofiber/fiber/v2"
 	"github.com/gofiber/template/html/v2"
@@ -624,6 +625,23 @@ func main() {
 		log.Fatal("Error initializing database:", err)
 	}
 
+	// Initialize Kafka consumer
+	consumer, err := telemetry.NewConsumer(
+		"tesla-kafka-brokers.tesla.svc.cluster.local:9092",  // Kafka broker
+		"tesla_V", // Topic name
+		"tesla-fleet-consumer",  // Consumer group ID
+	)
+	if err != nil {
+		log.Printf("Warning: Failed to create Kafka consumer: %v", err)
+	} else {
+		// Start the consumer in a goroutine
+		go func() {
+			if err := consumer.Start(); err != nil {
+				log.Printf("Error running Kafka consumer: %v", err)
+			}
+		}()
+	}
+
 	// Create a new engine
 	engine := html.New("./views", ".html")
 

telemetry/consumer.go

@@ -0,0 +1,102 @@
+package telemetry
+
+import (
+	"encoding/base64"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/confluentinc/confluent-kafka-go/v2/kafka"
+	"github.com/teslamotors/fleet-telemetry/protos"
+	"google.golang.org/protobuf/proto"
+)
+
+type Consumer struct {
+	consumer *kafka.Consumer
+	topic    string
+	running  bool
+}
+
+func NewConsumer(brokers, topic, groupID string) (*Consumer, error) {
+	config := &kafka.ConfigMap{
+		"bootstrap.servers": brokers,
+		"group.id":          groupID,
+		"auto.offset.reset": "earliest",
+	}
+
+	consumer, err := kafka.NewConsumer(config)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create consumer: %v", err)
+	}
+
+	return &Consumer{
+		consumer: consumer,
+		topic:    topic,
+	}, nil
+}
+
+func (c *Consumer) Start() error {
+	if err := c.consumer.Subscribe(c.topic, nil); err != nil {
+		return fmt.Errorf("failed to subscribe to topic %s: %v", c.topic, err)
+	}
+
+	log.Printf("Subscribed to topic: %s", c.topic)
+	c.running = true
+
+	// Handle graceful shutdown
+	sigchan := make(chan os.Signal, 1)
+	signal.Notify(sigchan, syscall.SIGINT, syscall.SIGTERM)
+
+	// Handle shutdown in a separate goroutine
+	go func() {
+		sig := <-sigchan
+		log.Printf("Caught signal %v, initiating shutdown...", sig)
+		c.running = false
+		signal.Stop(sigchan)
+		close(sigchan)
+	}()
+
+	// Start consuming messages
+	log.Println("Starting to consume messages...")
+	for c.running {
+		msg, err := c.consumer.ReadMessage(100) // Add 100ms timeout
+		if err != nil {
+			if err.(kafka.Error).Code() == kafka.ErrTimedOut {
+				if !c.running {
+					break
+				}
+				continue
+			}
+			log.Printf("Error reading message: %v", err)
+			continue
+		}
+
+		// Decode and handle the message
+		if err := c.handleMessage(msg); err != nil {
+			log.Printf("Error handling message: %v", err)
+		}
+	}
+
+	log.Println("Shutting down consumer...")
+	return c.consumer.Close()
+}
+
+func (c *Consumer) handleMessage(msg *kafka.Message) error {
+	// The message value should be a base64 encoded protobuf
+	data, err := base64.StdEncoding.DecodeString(string(msg.Value))
+	if err != nil {
+		return fmt.Errorf("failed to decode base64 message: %v", err)
+	}
+
+	// Unmarshal the protobuf message
+	payload := &protos.Payload{}
+	if err := proto.Unmarshal(data, payload); err != nil {
+		return fmt.Errorf("failed to unmarshal protobuf: %v", err)
+	}
+
+	// Log the decoded message
+	log.Printf("Received payload: %+v", payload)
+	return nil
+}