diff options
| -rw-r--r-- | .gitignore | 2 | ||||
| -rw-r--r-- | Makefile | 8 | ||||
| -rw-r--r-- | README.md | 2 | ||||
| -rw-r--r-- | consumer.go | 59 | ||||
| -rw-r--r-- | getting-started.properties | 1 | ||||
| -rw-r--r-- | go.mod | 5 | ||||
| -rw-r--r-- | go.sum | 211 | ||||
| -rw-r--r-- | kafka-sandbox/docker-compose.yml | 167 | ||||
| -rw-r--r-- | producer.go | 62 | ||||
| -rw-r--r-- | util/util.go | 43 |
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 }} @@ -0,0 +1,5 @@ +module kafka-sandbox + +go 1.21 + +require github.com/confluentinc/confluent-kafka-go v1.9.2 @@ -0,0 +1,211 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/actgardner/gogen-avro/v10 v10.1.0/go.mod h1:o+ybmVjEa27AAr35FRqU98DJu1fXES56uXniYFv4yDA= +github.com/actgardner/gogen-avro/v10 v10.2.1/go.mod h1:QUhjeHPchheYmMDni/Nx7VB0RsT/ee8YIgGY/xpEQgQ= 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v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= +honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= 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 + +} |