我尝试使用融合的docker映像设置3节点kafka集群。
https://hub.docker.com/r/confluentinc/cp-kafka
https://hub.docker.com/r/confluentinc/cp-zookeeper
docker run -d --restart always --name zk-1 -e zk_id=1 -e zk_server.1=ip1:2888:3888 -e zk_server.2=ip2:2888:3888 -e zk_server.3=ip3:2888:3888 -e ZOOKEEPER_CLIENT_PORT=2181 -p 2181:2181 -p 2888:2888 -p 3888:3888 confluentinc/cp-zookeeper:5.2.1-1
docker run -d --restart always --name zk-2 -e zk_id=2 -e zk_server.1=ip1:2888:3888 -e zk_server.2=ip2:2888:3888 -e zk_server.3=ip3:2888:3888 -e ZOOKEEPER_CLIENT_PORT=2181 -p 2181:2181 -p 2888:2888 -p 3888:3888 confluentinc/cp-zookeeper:5.2.1-1
docker run -d --restart always --name zk-3 -e zk_id=3 -e zk_server.1=ip1:2888:3888 -e zk_server.2=ip2:2888:3888 -e zk_server.3=ip3:2888:3888 -e ZOOKEEPER_CLIENT_PORT=2181 -p 2181:2181 -p 2888:2888 -p 3888:3888 confluentinc/cp-zookeeper:5.2.1-1
docker run -d --restart always --name kafka-1 -e KAFKA_BROKER_ID=1 -e KAFKA_ZOOKEEPER_CONNECT=ip1:2181,ip2:2181,ip3:2181 -e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://ip1:9092 -p 9092:9092 confluentinc/cp-kafka:5.2.1-1
docker run -d --restart always --name kafka-2 -e KAFKA_BROKER_ID=2 -e KAFKA_ZOOKEEPER_CONNECT=ip1:2181,ip2:2181,ip3:2181 -p 9092:9092 -e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://ip2:9092 confluentinc/cp-kafka:5.2.1-1
docker run -d --restart always --name kafka-3 -e KAFKA_BROKER_ID=3 -e KAFKA_ZOOKEEPER_CONNECT=ip1:2181,ip2:2181,ip3:2181 -p 9092:9092 -e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://ip3:9092 confluentinc/cp-kafka:5.2.1-1
但是当我形成集群时，我看到1个或2个经纪人，而不是我形成的所有3个经纪人。
docker run -it --net host confluentinc/cp-kafkacat kafkacat -b localhost:9092 -L
如果在合并的bootstrap.server中看不到这种情况，我是否需要在形成集群时设置documentation属性。
日志
[2019-06-06 06:12:06,788] INFO [ExpirationReaper-1-DeleteRecords]: Starting (kafka.server.DelayedOperationPurgatory$ExpiredOperationReaper)
[2019-06-06 06:12:06,793] INFO [ExpirationReaper-1-ElectPreferredLeader]: Starting (kafka.server.DelayedOperationPurgatory$ExpiredOperationReaper)
[2019-06-06 06:12:06,801] INFO [LogDirFailureHandler]: Starting (kafka.server.ReplicaManager$LogDirFailureHandler)
[2019-06-06 06:12:06,850] INFO Creating /brokers/ids/1 (is it secure? false) (kafka.zk.KafkaZkClient)
[2019-06-06 06:12:06,868] INFO Stat of the created znode at /brokers/ids/1 is: 565,565,1559801526862,1559801526862,1,0,0,72057595854848009,196,0,565
(kafka.zk.KafkaZkClient)
[2019-06-06 06:12:06,870] INFO Registered broker 1 at path /brokers/ids/1 with addresses: ArrayBuffer(EndPoint(ip1,9092,ListenerName(PLAINTEXT),PLAINTEXT)), czxid (broker epoch): 565 (kafka.zk.KafkaZkClient)
[2019-06-06 06:12:06,871] WARN No meta.properties file under dir /var/lib/kafka/data/meta.properties (kafka.server.BrokerMetadataCheckpoint)
[2019-06-06 06:12:06,934] INFO [ControllerEventThread controllerId=1] Starting (kafka.controller.ControllerEventManager$ControllerEventThread)
[2019-06-06 06:12:06,943] INFO [ExpirationReaper-1-topic]: Starting (kafka.server.DelayedOperationPurgatory$ExpiredOperationReaper)
[2019-06-06 06:12:06,949] INFO [ExpirationReaper-1-Heartbeat]: Starting (kafka.server.DelayedOperationPurgatory$ExpiredOperationReaper)
[2019-06-06 06:12:06,958] INFO [ExpirationReaper-1-Rebalance]: Starting (kafka.server.DelayedOperationPurgatory$ExpiredOperationReaper)
[2019-06-06 06:12:06,960] DEBUG [Controller id=1] Broker 2 has been elected as the controller, so stopping the election process. (kafka.controller.KafkaController)
[2019-06-06 06:12:06,966] INFO [GroupCoordinator 1]: Starting up. (kafka.coordinator.group.GroupCoordinator)
[2019-06-06 06:12:06,966] INFO [GroupCoordinator 1]: Startup complete. (kafka.coordinator.group.GroupCoordinator)
[2019-06-06 06:12:06,970] INFO [GroupMetadataManager brokerId=1] Removed 0 expired offsets in 1 milliseconds. (kafka.coordinator.group.GroupMetadataManager)
[2019-06-06 06:12:06,983] INFO [ProducerId Manager 1]: Acquired new producerId block (brokerId:1,blockStartProducerId:9000,blockEndProducerId:9999) by writing to Zk with path version 10 (kafka.coordinator.transaction.ProducerIdManager)
[2019-06-06 06:12:07,004] INFO [TransactionCoordinator id=1] Starting up. (kafka.coordinator.transaction.TransactionCoordinator)
[2019-06-06 06:12:07,005] INFO [TransactionCoordinator id=1] Startup complete. (kafka.coordinator.transaction.TransactionCoordinator)
[2019-06-06 06:12:07,007] INFO [Transaction Marker Channel Manager 1]: Starting (kafka.coordinator.transaction.TransactionMarkerChannelManager)
[2019-06-06 06:12:07,031] INFO [/config/changes-event-process-thread]: Starting (kafka.common.ZkNodeChangeNotificationListener$ChangeEventProcessThread)
[2019-06-06 06:12:07,044] INFO [SocketServer brokerId=1] Started data-plane processors for 1 acceptors (kafka.network.SocketServer)
[2019-06-06 06:12:07,048] INFO Kafka version: 2.2.0-cp2 (org.apache.kafka.common.utils.AppInfoParser)
[2019-06-06 06:12:07,068] INFO Kafka commitId: 00d486623990ed9d (org.apache.kafka.common.utils.AppInfoParser)
[2019-06-06 06:12:07,072] INFO [KafkaServer id=1] started (kafka.server.KafkaServer)
[2019-06-06 06:12:07,078] INFO Waiting until monitored service is ready for metrics collection (io.confluent.support.metrics.BaseMetricsReporter)
[2019-06-06 06:12:07,082] INFO Monitored service is now ready (io.confluent.support.metrics.BaseMetricsReporter)
[2019-06-06 06:12:07,082] INFO Attempting to collect and submit metrics (io.confluent.support.metrics.BaseMetricsReporter)
[2019-06-06 06:12:07,108] TRACE [Broker id=1] Cached leader info PartitionState(controllerEpoch=5, leader=2, leaderEpoch=1, isr=[2], zkVersion=1, replicas=[2], offlineReplicas=[]) for partition __confluent.support.metrics-0 in response to UpdateMetadata request sent by controller 2 epoch 6 with correlation id 0 (state.change.logger)
[2019-06-06 06:12:07,322] WARN The replication factor of topic __confluent.support.metrics is 1, which is less than the desired replication factor of 3. If you happen to add more brokers to this cluster, then it is important to increase the replication factor of the topic to eventually 3 to ensure reliable and durable metrics collection. (io.confluent.support.metrics.common.kafka.KafkaUtilities)
[2019-06-06 06:12:07,334] INFO ProducerConfig values:
acks = 1
batch.size = 16384
bootstrap.servers = [PLAINTEXT://ip1:9092, PLAINTEXT://ip2:9092]
buffer.memory = 33554432
client.dns.lookup = default
client.id =
compression.type = none
connections.max.idle.ms = 540000
delivery.timeout.ms = 120000
enable.idempotence = false
interceptor.classes = []
key.serializer = class org.apache.kafka.common.serialization.ByteArraySerializer
linger.ms = 0
max.block.ms = 10000
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 = 30000
retries = 2147483647
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
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.ByteArraySerializer
(org.apache.kafka.clients.producer.ProducerConfig)
[2019-06-06 06:12:07,366] INFO Kafka version: 2.2.0-cp2 (org.apache.kafka.common.utils.AppInfoParser)
[2019-06-06 06:12:07,366] INFO Kafka commitId: 00d486623990ed9d (org.apache.kafka.common.utils.AppInfoParser)
[2019-06-06 06:12:07,399] INFO Cluster ID: 0DmmTlnXQMGD52urD7rxuA (org.apache.kafka.clients.Metadata)
[2019-06-06 06:12:07,449] INFO [Producer clientId=producer-1] Closing the Kafka producer with timeoutMillis = 9223372036854775807 ms. (org.apache.kafka.clients.producer.KafkaProducer)
[2019-06-06 06:12:07,459] INFO Successfully submitted metrics to Kafka topic __confluent.support.metrics (io.confluent.support.metrics.submitters.KafkaSubmitter)
[2019-06-06 06:12:08,470] INFO Successfully submitted metrics to Confluent via secure endpoint (io.confluent.support.metrics.submitters.ConfluentSubmitter)
如您所见，bootstrap.servers会自动填充为ip1和ip2。 ip3丢失时。
答案 0 :(得分：1)
因此，首先，它已经存在于Compose文件中
但是，我认为它假设您的主机是Linux，因为只有network: host可以正常工作
无论如何，一些注意事项
ip1不存在...它必须是zk-1该容器的主机名-p 2181:2181 -p 2888:2888 -p 3888:3888的每种用法（实际上，2888和3888不需要暴露给您的主机）-p 9092:9092中，则不必使用{li> --net host来使用kafkacat（就像Docker compose一样）