我如何向普罗米修斯报告 Kafka Producer 的指标（使用 spring boot）

Question

I am working with spring-integration for data flow from a UDP endpoint to kafka. I have initialized a replyingKafkaTemplate as a @Bean in the @Configuration with both consumer and producer configurations. When my server is up and after sending some udp requests, I can see the consumer's metrics. However, I cannot see the producer's metrics even after setting a jmx reporter in the Producer Configuration.

I have tried not to set the producer metrics reporter assuming it will automatically appear as the consumer metrics did(with no extra configuration there)

producer configuration

Map<String, Object> configProps = new HashMap<>();
        configProps.put(
                ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,
                bootstrapAddress);
        configProps.put(
                ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
                StringSerializer.class);
        configProps.put(
                ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,
                KafkaAvroSerializer.class);
        configProps.put("schema.registry.url", "http://schema-regisry-server:8081");
        configProps.put(
                ProducerConfig.RETRIES_CONFIG,
                3);
        configProps.put(ProducerConfig.RECONNECT_BACKOFF_MS_CONFIG, 500);
        configProps.put(ProducerConfig.RECONNECT_BACKOFF_MAX_MS_CONFIG, 5000);
        configProps.put(ProducerConfig.METRIC_REPORTER_CLASSES_CONFIG, "org.apache.kafka.common.metrics.JmxReporter");
        configProps.put(ProducerConfig.METRICS_RECORDING_LEVEL_CONFIG, "INFO");

        printConfigProps(configProps);
        return new DefaultKafkaProducerFactory<>(configProps);

consumer configuration

Map<String, Object> properties = new HashMap<>();
        properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapAddress);
        properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, KafkaAvroDeserializer.class);
        properties.put("schema.registry.url", "http://schema-regisry-server:8081");
        properties.put(ConsumerConfig.GROUP_ID_CONFIG, "spring-integration");
        // automatically reset the offset to the earliest offset
        properties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");

        return properties;

kafka template creation

@Bean
    public ReplyingKafkaTemplate<String, DataModel, DataModel> replyKafkaTemplate(ProducerFactory<String, DataModel> pf, KafkaMessageListenerContainer<String, DataModel> container) {
        ReplyingKafkaTemplate<String, DataModel, DataModel> template = new ReplyingKafkaTemplate<>(pf, container);
        template.start();
        return template;
    }

Listener container creation:

@Bean
    public KafkaMessageListenerContainer<String, DataModel> replyContainer(ConsumerFactory<String, DataModel> cf) {
        ContainerProperties containerProperties = new ContainerProperties(destinationTopic);
        containerProperties.setGroupId("test");
        return new KafkaMessageListenerContainer<>(cf, containerProperties);
    }

ConsumerFactory creation

@Bean
    public ConsumerFactory<?, ?> consumerFactory() {
        return new DefaultKafkaConsumerFactory<>(consumerConfigs());
    }

Answer 1

Spring Boot 2 versions prior to 2.3.0 are only exposing consumer metrics by default. Spring Boot 2.3.0 (released a few weeks ago) is dependent on Micrometer 1.4, which is exposing both consumer and producer metrics by default. If you cant use the latest version of Spring Boot, you'll have to implement it yourself.