请教一个使用 HAProxy 代理访问 kafka 集群的问题

[967182]

kafka 集群有三台机器 kafka01:9092 kafka03:9092 kafka03:9092

因为受网络原因约束不能直接访问集群，只能在服务器 192.168.30.160 上搭代理 试了两种配置方式

方式一:
listen kafka
    bind *:9092
    mode tcp
    balance roundrobin
    no option clitcpka
    timeout check 5s
    server kafka01 192.168.41.168:9092 check inter 5000 rise 2 fall 3
    server kafka02 192.168.41.169:9092 check inter 5000 rise 2 fall 3
    server kafka03 192.168.41.170:9092 check inter 5000 rise 2 fall 3

方式二:
listen kafka
    bind *:9092
    mode tcp
   balance roundrobin
    server  kafka1 127.0.0.1:8881 check
    server  kafka2 127.0.0.1:8883 check
    server  kafka3 127.0.0.1:8885 check 

listen kafka01
    bind *:8881
    mode tcp
    server  kafka1 192.168.41.168:9092 check

listen kafka02
    bind *:8883
    mode tcp
    server  kafka1 192.168.41.169:9092 check

listen kafka03
    bind *:8885
    mode tcp
    server  kafka1 192.168.41.170:9092 check

kafka client 试过这两个配置，kafka01,kafka02,kafka03 都指向了 192.168.30.160
public final static String bootstrapServers = "kafka01:9092,kafka02:9092,kafka03:9092";
public final static String bootstrapServers = "kafka01:9092";
网络测试 telnet 通，  代理和 host ping 也都通。

发送消息时报错 ：

19:37:39.347 [main] INFO org.apache.kafka.clients.producer.ProducerConfig - ProducerConfig values: 
	acks = -1
	batch.size = 16384
	bootstrap.servers = [kafka01:9092]
	buffer.memory = 33554432
	client.dns.lookup = default
	client.id = 
	compression.type = gzip
	connections.max.idle.ms = 3000
	delivery.timeout.ms = 120000
	enable.idempotence = false
	interceptor.classes = []
	key.serializer = class org.apache.kafka.common.serialization.StringSerializer
	linger.ms = 500
	max.block.ms = 60000
	max.in.flight.requests.per.connection = 5
	max.request.size = 1048576
	metadata.max.age.ms = 300000
	metric.reporters = []
	metrics.num.samples = 2
	metrics.recording.level = INFO
	metrics.sample.window.ms = 30000
	partitioner.class = class org.apache.kafka.clients.producer.internals.DefaultPartitioner
	receive.buffer.bytes = 32768
	reconnect.backoff.max.ms = 1000
	reconnect.backoff.ms = 50
	request.timeout.ms = 10000
	retries = 0
	retry.backoff.ms = 100
	sasl.client.callback.handler.class = null
	sasl.jaas.config = null
	sasl.kerberos.kinit.cmd = /usr/bin/kinit
	sasl.kerberos.min.time.before.relogin = 60000
	sasl.kerberos.service.name = null
	sasl.kerberos.ticket.renew.jitter = 0.05
	sasl.kerberos.ticket.renew.window.factor = 0.8
	sasl.login.callback.handler.class = null
	sasl.login.class = null
	sasl.login.refresh.buffer.seconds = 300
	sasl.login.refresh.min.period.seconds = 60
	sasl.login.refresh.window.factor = 0.8
	sasl.login.refresh.window.jitter = 0.05
	sasl.mechanism = GSSAPI
	security.protocol = PLAINTEXT
	security.providers = null
	send.buffer.bytes = 131072
	ssl.cipher.suites = null
	ssl.enabled.protocols = [TLSv1.2, TLSv1.1, TLSv1]
	ssl.endpoint.identification.algorithm = https
	ssl.key.password = null
	ssl.keymanager.algorithm = SunX509
	ssl.keystore.location = null
	ssl.keystore.password = null
	ssl.keystore.type = JKS
	ssl.protocol = TLS
	ssl.provider = null
	ssl.secure.random.implementation = null
	ssl.trustmanager.algorithm = PKIX
	ssl.truststore.location = null
	ssl.truststore.password = null
	ssl.truststore.type = JKS
	transaction.timeout.ms = 60000
	transactional.id = null
	value.serializer = class org.apache.kafka.common.serialization.StringSerializer

19:37:42.274 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.clients.producer.internals.Sender - [Producer clientId=producer-1] Starting Kafka producer I/O thread.
19:37:42.280 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Initialize connection to node kafka01:9092 (id: -1 rack: null) for sending metadata request
19:37:42.283 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Initiating connection to node kafka01:9092 (id: -1 rack: null) using address kafka01/192.168.30.160
19:37:42.287 [main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka version: 2.4.1
19:37:42.287 [main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka commitId: c57222ae8cd7866b
19:37:42.288 [main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka startTimeMs: 1682077062274
19:37:42.296 [main] DEBUG org.apache.kafka.clients.producer.KafkaProducer - [Producer clientId=producer-1] Kafka producer started
19:37:45.442 [main] INFO com.example.demokafka.test.TestProduct - 准备发送
19:38:00.121 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.common.network.Selector - [Producer clientId=producer-1] Created socket with SO_RCVBUF = 32768, SO_SNDBUF = 131072, SO_TIMEOUT = 0 to node -1
19:38:00.432 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Completed connection to node -1. Fetching API versions.
19:38:00.432 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Initiating API versions fetch from node -1.
19:38:00.577 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.common.network.Selector - [Producer clientId=producer-1] Connection with kafka01/192.168.30.160 disconnected
java.io.EOFException: null
	at org.apache.kafka.common.network.NetworkReceive.readFrom(NetworkReceive.java:96)
	at org.apache.kafka.common.network.KafkaChannel.receive(KafkaChannel.java:424)
	at org.apache.kafka.common.network.KafkaChannel.read(KafkaChannel.java:385)
	at org.apache.kafka.common.network.Selector.attemptRead(Selector.java:651)
	at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:572)
	at org.apache.kafka.common.network.Selector.poll(Selector.java:483)
	at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:547)
	at org.apache.kafka.clients.producer.internals.Sender.runOnce(Sender.java:335)
	at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:244)
	at java.base/java.lang.Thread.run(Thread.java:834)
19:38:00.579 [kafka-producer-network-thread | producer-1] DEBUG org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Node -1 disconnected.
19:38:00.583 [kafka-producer-network-thread | producer-1] WARN org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-1] Bootstrap broker kafka01:9092 (id: -1 rack: null) disconnected

实在想不通是啥问题了，望大佬能赐教。

[lsk569937453]

换个能代理 kafka 的 proxy,只要支持 tcp 就行了，比如 nginx 。
然后看是否正常，如果都失败，就排除是 proxy 的问题了。
然后这条链路上的其他问题,dns 啥的。

[vgbw]

你是想通过 192.168.30.160 : 9092 一个端口来访问 3 个集群节点？这应该不行的，因为消息是可能会被发送到到不同的分区，所以生产者应该会尝试连接集群里面其他的节点，ha 没做 kafka 协议解析应该没法识别要连到哪个节点，如果是单个节点应该可以。

[967182]

@vgbw 我试过用 9092 9093 9094 三个端口访问集群貌似也不行

[967182]

@lsk569937453 nginx 也试过不好用，在局域网也搭了一套这样的环境基本可以排除是网络问题的。

[lsk569937453]

https://github.com/grepplabs/kafka-proxy
这个用过吗？我看也是 proxy 上得开多端口啊。

[vgbw]

@967182 如果是 ha 开 3 个端口, 修改每个 kafka 节点配置文件 config/server.properties 的 advertised.listeners=PLAINTEXT://{haproxy_ip}:{ha 对应该节点的端口}

[967182]

@vgbw 不行，情况比较复杂好多项目在用， 必须保证是 9092 不能影响别人

[967182]

@lsk569937453 嗯嗯，在看这个东西，目前也有问题没跑通。