wip

author: Trygve Laugstøl <trygvis@inamo.no> 2024-02-07 11:20:43 +0100
committer: Trygve Laugstøl <trygvis@inamo.no> 2024-02-07 11:20:43 +0100
commit: fc9414a56dbcbf7956e1c6fdf7bd7b4a5df2be15 (patch)
tree: dcd8ddb7e32183ee3d0f52e0110c75b182f0bc1f
download: kafka-sandbox-fc9414a56dbcbf7956e1c6fdf7bd7b4a5df2be15.tar.gz
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kafka-sandbox-fc9414a56dbcbf7956e1c6fdf7bd7b4a5df2be15.zip
10 files changed, 560 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9fb18b4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.idea
+out
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..093da5e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+all: out/producer out/consumer
+
+out/producer out/consumer: $(wildcard *.go)
+	@echo $@
+	@go build -o $@ $(patsubst out/%,%.go,$@)
+
+clean:
+	rm -f out/producer out/consumer
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..35ffa4f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+* Docker compose: https://github.com/confluentinc/cp-all-in-one/blob/7.5.3-post/cp-all-in-one-kraft/docker-compose.yml
+* Demo: https://developer.confluent.io/get-started/go
diff --git a/consumer.go b/consumer.go
new file mode 100644
index 0000000..c838b0c
--- /dev/null
+++ b/consumer.go
@@ -0,0 +1,59 @@
+package main
+
+import (
+	"fmt"
+	"kafka-sandbox/util"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/confluentinc/confluent-kafka-go/kafka"
+)
+
+func main() {
+
+	if len(os.Args) != 2 {
+		fmt.Fprintf(os.Stderr, "Usage: %s <config-file-path>\n",
+			os.Args[0])
+		os.Exit(1)
+	}
+
+	configFile := os.Args[1]
+	conf := util.ReadConfig(configFile)
+	conf["group.id"] = "kafka-go-getting-started"
+	conf["auto.offset.reset"] = "earliest"
+
+	c, err := kafka.NewConsumer(&conf)
+
+	if err != nil {
+		fmt.Printf("Failed to create consumer: %s", err)
+		os.Exit(1)
+	}
+
+	topic := "purchases"
+	err = c.SubscribeTopics([]string{topic}, nil)
+	// Set up a channel for handling Ctrl-C, etc
+	sigchan := make(chan os.Signal, 1)
+	signal.Notify(sigchan, syscall.SIGINT, syscall.SIGTERM)
+
+	// Process messages
+	run := true
+	for run {
+		select {
+		case sig := <-sigchan:
+			fmt.Printf("Caught signal %v: terminating\n", sig)
+			run = false
+		default:
+			ev, err := c.ReadMessage(100 * time.Millisecond)
+			if err != nil {
+				// Errors are informational and automatically handled by the consumer
+				continue
+			}
+			fmt.Printf("Consumed event from topic %s: key = %-10s value = %s\n",
+				*ev.TopicPartition.Topic, string(ev.Key), string(ev.Value))
+		}
+	}
+
+	c.Close()
+}
diff --git a/getting-started.properties b/getting-started.properties
new file mode 100644
index 0000000..ea4ec5a
--- /dev/null
+++ b/getting-started.properties
@@ -0,0 +1 @@
+bootstrap.servers={{ kafka.broker.server }}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..975f1fd
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module kafka-sandbox
+
+go 1.21
+
+require github.com/confluentinc/confluent-kafka-go v1.9.2
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..8086547
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,211 @@
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diff --git a/kafka-sandbox/docker-compose.yml b/kafka-sandbox/docker-compose.yml
new file mode 100644
index 0000000..1f50f7f
--- /dev/null
+++ b/kafka-sandbox/docker-compose.yml
@@ -0,0 +1,167 @@
+---
+version: '2'
+services:
+
+  broker:
+    image: confluentinc/cp-kafka:7.5.3
+    hostname: broker
+    container_name: broker
+    ports:
+      - "9092:9092"
+      - "9101:9101"
+    environment:
+      KAFKA_NODE_ID: 1
+      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: 'CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT'
+      KAFKA_ADVERTISED_LISTENERS: 'PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092'
+      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
+      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
+      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
+      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
+      KAFKA_JMX_PORT: 9101
+      KAFKA_JMX_HOSTNAME: localhost
+      KAFKA_PROCESS_ROLES: 'broker,controller'
+      KAFKA_CONTROLLER_QUORUM_VOTERS: '1@broker:29093'
+      KAFKA_LISTENERS: 'PLAINTEXT://broker:29092,CONTROLLER://broker:29093,PLAINTEXT_HOST://0.0.0.0:9092'
+      KAFKA_INTER_BROKER_LISTENER_NAME: 'PLAINTEXT'
+      KAFKA_CONTROLLER_LISTENER_NAMES: 'CONTROLLER'
+      KAFKA_LOG_DIRS: '/tmp/kraft-combined-logs'
+      # Replace CLUSTER_ID with a unique base64 UUID using "bin/kafka-storage.sh random-uuid"
+      # See https://docs.confluent.io/kafka/operations-tools/kafka-tools.html#kafka-storage-sh
+      CLUSTER_ID: 'MkU3OEVBNTcwNTJENDM2Qk'
+
+  schema-registry:
+    image: confluentinc/cp-schema-registry:7.5.3
+    hostname: schema-registry
+    container_name: schema-registry
+    depends_on:
+      - broker
+    ports:
+      - "8081:8081"
+    environment:
+      SCHEMA_REGISTRY_HOST_NAME: schema-registry
+      SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: 'broker:29092'
+      SCHEMA_REGISTRY_LISTENERS: http://0.0.0.0:8081
+
+  connect:
+    image: cnfldemos/cp-server-connect-datagen:0.6.2-7.5.0
+    hostname: connect
+    container_name: connect
+    depends_on:
+      - broker
+      - schema-registry
+    ports:
+      - "8083:8083"
+    environment:
+      CONNECT_BOOTSTRAP_SERVERS: 'broker:29092'
+      CONNECT_REST_ADVERTISED_HOST_NAME: connect
+      CONNECT_GROUP_ID: compose-connect-group
+      CONNECT_CONFIG_STORAGE_TOPIC: docker-connect-configs
+      CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_OFFSET_FLUSH_INTERVAL_MS: 10000
+      CONNECT_OFFSET_STORAGE_TOPIC: docker-connect-offsets
+      CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_STATUS_STORAGE_TOPIC: docker-connect-status
+      CONNECT_STATUS_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_KEY_CONVERTER: org.apache.kafka.connect.storage.StringConverter
+      CONNECT_VALUE_CONVERTER: io.confluent.connect.avro.AvroConverter
+      CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: http://schema-registry:8081
+      # CLASSPATH required due to CC-2422
+      CLASSPATH: /usr/share/java/monitoring-interceptors/monitoring-interceptors-7.5.3.jar
+      CONNECT_PRODUCER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringProducerInterceptor"
+      CONNECT_CONSUMER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor"
+      CONNECT_PLUGIN_PATH: "/usr/share/java,/usr/share/confluent-hub-components"
+      CONNECT_LOG4J_LOGGERS: org.apache.zookeeper=ERROR,org.I0Itec.zkclient=ERROR,org.reflections=ERROR
+
+  control-center:
+    image: confluentinc/cp-enterprise-control-center:7.5.3
+    hostname: control-center
+    container_name: control-center
+    depends_on:
+      - broker
+      - schema-registry
+      - connect
+      - ksqldb-server
+    ports:
+      - "9021:9021"
+    environment:
+      CONTROL_CENTER_BOOTSTRAP_SERVERS: 'broker:29092'
+      CONTROL_CENTER_CONNECT_CONNECT-DEFAULT_CLUSTER: 'connect:8083'
+      CONTROL_CENTER_CONNECT_HEALTHCHECK_ENDPOINT: '/connectors'
+      CONTROL_CENTER_KSQL_KSQLDB1_URL: "http://ksqldb-server:8088"
+      CONTROL_CENTER_KSQL_KSQLDB1_ADVERTISED_URL: "http://localhost:8088"
+      CONTROL_CENTER_SCHEMA_REGISTRY_URL: "http://schema-registry:8081"
+      CONTROL_CENTER_REPLICATION_FACTOR: 1
+      CONTROL_CENTER_INTERNAL_TOPICS_PARTITIONS: 1
+      CONTROL_CENTER_MONITORING_INTERCEPTOR_TOPIC_PARTITIONS: 1
+      CONFLUENT_METRICS_TOPIC_REPLICATION: 1
+      PORT: 9021
+
+  ksqldb-server:
+    image: confluentinc/cp-ksqldb-server:7.5.3
+    hostname: ksqldb-server
+    container_name: ksqldb-server
+    depends_on:
+      - broker
+      - connect
+    ports:
+      - "8088:8088"
+    environment:
+      KSQL_CONFIG_DIR: "/etc/ksql"
+      KSQL_BOOTSTRAP_SERVERS: "broker:29092"
+      KSQL_HOST_NAME: ksqldb-server
+      KSQL_LISTENERS: "http://0.0.0.0:8088"
+      KSQL_CACHE_MAX_BYTES_BUFFERING: 0
+      KSQL_KSQL_SCHEMA_REGISTRY_URL: "http://schema-registry:8081"
+      KSQL_PRODUCER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringProducerInterceptor"
+      KSQL_CONSUMER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor"
+      KSQL_KSQL_CONNECT_URL: "http://connect:8083"
+      KSQL_KSQL_LOGGING_PROCESSING_TOPIC_REPLICATION_FACTOR: 1
+      KSQL_KSQL_LOGGING_PROCESSING_TOPIC_AUTO_CREATE: 'true'
+      KSQL_KSQL_LOGGING_PROCESSING_STREAM_AUTO_CREATE: 'true'
+
+  ksqldb-cli:
+    image: confluentinc/cp-ksqldb-cli:7.5.3
+    container_name: ksqldb-cli
+    depends_on:
+      - broker
+      - connect
+      - ksqldb-server
+    entrypoint: /bin/sh
+    tty: true
+
+  ksql-datagen:
+    image: confluentinc/ksqldb-examples:7.5.3
+    hostname: ksql-datagen
+    container_name: ksql-datagen
+    depends_on:
+      - ksqldb-server
+      - broker
+      - schema-registry
+      - connect
+    command: "bash -c 'echo Waiting for Kafka to be ready... && \
+                       cub kafka-ready -b broker:29092 1 40 && \
+                       echo Waiting for Confluent Schema Registry to be ready... && \
+                       cub sr-ready schema-registry 8081 40 && \
+                       echo Waiting a few seconds for topic creation to finish... && \
+                       sleep 11 && \
+                       tail -f /dev/null'"
+    environment:
+      KSQL_CONFIG_DIR: "/etc/ksql"
+      STREAMS_BOOTSTRAP_SERVERS: broker:29092
+      STREAMS_SCHEMA_REGISTRY_HOST: schema-registry
+      STREAMS_SCHEMA_REGISTRY_PORT: 8081
+
+  rest-proxy:
+    image: confluentinc/cp-kafka-rest:7.5.3
+    depends_on:
+      - broker
+      - schema-registry
+    ports:
+      - 8082:8082
+    hostname: rest-proxy
+    container_name: rest-proxy
+    environment:
+      KAFKA_REST_HOST_NAME: rest-proxy
+      KAFKA_REST_BOOTSTRAP_SERVERS: 'broker:29092'
+      KAFKA_REST_LISTENERS: "http://0.0.0.0:8082"
+      KAFKA_REST_SCHEMA_REGISTRY_URL: 'http://schema-registry:8081'
diff --git a/producer.go b/producer.go
new file mode 100644
index 0000000..8cf1b0e
--- /dev/null
+++ b/producer.go
@@ -0,0 +1,62 @@
+package main
+
+import (
+	"fmt"
+	"kafka-sandbox/util"
+	"math/rand"
+	"os"
+
+	"github.com/confluentinc/confluent-kafka-go/kafka"
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Fprintf(os.Stderr, "Usage: %s <config-file-path>\n",
+			os.Args[0])
+		os.Exit(1)
+	}
+
+	configFile := os.Args[1]
+	conf := util.ReadConfig(configFile)
+
+	topic := "purchases"
+	p, err := kafka.NewProducer(&conf)
+
+	if err != nil {
+		fmt.Printf("Failed to create producer: %s", err)
+		os.Exit(1)
+	}
+
+	// Go-routine to handle message delivery reports and
+	// possibly other event types (errors, stats, etc)
+	go func() {
+		for e := range p.Events() {
+			switch ev := e.(type) {
+			case *kafka.Message:
+				if ev.TopicPartition.Error != nil {
+					fmt.Printf("Failed to deliver message: %v\n", ev.TopicPartition)
+				} else {
+					fmt.Printf("Produced event to topic %s: key = %-10s value = %s\n",
+						*ev.TopicPartition.Topic, string(ev.Key), string(ev.Value))
+				}
+			}
+		}
+	}()
+
+	users := [...]string{"eabara", "jsmith", "sgarcia", "jbernard", "htanaka", "awalther"}
+	items := [...]string{"book", "alarm clock", "t-shirts", "gift card", "batteries"}
+
+	for n := 0; n < 10; n++ {
+		key := users[rand.Intn(len(users))]
+		data := items[rand.Intn(len(items))]
+		p.Produce(&kafka.Message{
+			TopicPartition: kafka.TopicPartition{Topic: &topic, Partition: kafka.PartitionAny},
+			Key:            []byte(key),
+			Value:          []byte(data),
+		}, nil)
+	}
+
+	// Wait for all messages to be delivered
+	p.Flush(15 * 1000)
+	p.Close()
+}
diff --git a/util/util.go b/util/util.go
new file mode 100644
index 0000000..57c8246
--- /dev/null
+++ b/util/util.go
@@ -0,0 +1,43 @@
+package util
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/confluentinc/confluent-kafka-go/kafka"
+)
+
+func ReadConfig(configFile string) kafka.ConfigMap {
+
+	m := make(map[string]kafka.ConfigValue)
+
+	file, err := os.Open(configFile)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to open file: %s", err)
+		os.Exit(1)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if !strings.HasPrefix(line, "#") && len(line) != 0 {
+			before, after, found := strings.Cut(line, "=")
+			if found {
+				parameter := strings.TrimSpace(before)
+				value := strings.TrimSpace(after)
+				m[parameter] = value
+			}
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		fmt.Printf("Failed to read file: %s", err)
+		os.Exit(1)
+	}
+
+	return m
+
+}
author	Trygve Laugstøl <trygvis@inamo.no>	2024-02-07 11:20:43 +0100
committer	Trygve Laugstøl <trygvis@inamo.no>	2024-02-07 11:20:43 +0100
commit	fc9414a56dbcbf7956e1c6fdf7bd7b4a5df2be15 (patch)
tree	dcd8ddb7e32183ee3d0f52e0110c75b182f0bc1f
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