Kafka的配置方式有三种 ，分别是单机、伪分布式集群和分布式集群，部署都很常规，博客资源也很多，这里简单介绍，详细说明Kafka集群如何进行外网访问。
1 伪分布式集群部署
内网IP：10.12.100.126 外网IP：47.90.133.76 域名：server1 server2 server3
配置 Kafka server.properties
# server1
broker.id=1
delete.topic.enable=true
auto.create.topic.enable = true
listeners=PLAINTEXT://10.12.100.126:9092
port=9092
log.dirs=/opt/kafka/kafkaLog
message.max.byte=5242880
default.replication.factor=2
replica.fetch.max.bytes=5242880
zookeeper.connect=10.12.100.126:2181,10.12.100.126:2182,10.12.100.126:2183
# server2
broker.id=2
delete.topic.enable=true
auto.create.topic.enable = true
listeners=PLAINTEXT://10.12.100.126:9093
port=9093
log.dirs=/opt/kafka/kafkaLog
message.max.byte=5242880
default.replication.factor=2
replica.fetch.max.bytes=5242880
zookeeper.connect=10.12.100.126:2181,10.12.100.126:2182,10.12.100.126:2183
# server3
broker.id=3
delete.topic.enable=true
auto.create.topic.enable = true
listeners=PLAINTEXT://10.12.100.126:9094
port=9094
log.dirs=/opt/kafka/kafkaLog
message.max.byte=5242880
default.replication.factor=2
replica.fetch.max.bytes=5242880
zookeeper.connect=10.12.100.126:2181,10.12.100.126:2182,10.12.100.126:2183
2 配置 伪分布式集群外网访问
2.1 修改hosts
# server1
10.12.100.126 server1 改为： 47.90.133.76 server1
# server2
10.12.100.12 server2 改为： 47.90.133.76 server2
# server3
10.12.100.126 server3 改为： 47.90.133.76 server32 Kafka server.properties文件更改：
# server1
port = 9092
advertised.listeners=PLAINTEXT://47.90.133.76:9092
# server2
port = 9093
advertised.listeners=PLAINTEXT://47.90.133.76:9093
# server3
port = 9094
advertised.listeners=PLAINTEXT://47.90.133.76:9094注意：
Server.properties 文件中zookeeper信息不需要更改依旧是
zookeeper.connect=10.12.100.126:2181,10.12.100.126:2182,10.12.100.126:2183
3 分布式集群部署
内网IP：10.12.100.126 10.12.100.127 10.12.100.128 外网IP：47.90.133.76 47.90.133.77 47.90.133.78 域名：server1 server2 server3
server1
/opt/kafka/kafka_2.11-0.10.2.2/config vi server.properties
## 增加下列配置信息
broker.id=1
delete.topic.enable=true
auto.create.topic.enable = true
listeners=PLAINTEXT://10.12.100.126:9092
log.dirs=/opt/kafka/kafkaLog
message.max.byte=5242880
default.replication.factor=2
replica.fetch.max.bytes=5242880
zookeeper.connect=10.12.100.126:2181,10.12.100.127:2181,10.12.100.128:2181
server2
/opt/kafka/kafka_2.11-0.10.2.2/config vi server.properties
## 增加下列配置信息
broker.id=2
delete.topic.enable=true
auto.create.topic.enable = true
listeners=PLAINTEXT://10.12.100.127:9092
log.dirs=/opt/kafka/kafkaLog
message.max.byte=5242880
default.replication.factor=2
replica.fetch.max.bytes=5242880
zookeeper.connect=10.12.100.126:2181,10.12.100.127:2181,10.12.100.128:2181
server3
/opt/kafka/kafka_2.11-0.10.2.2/config vi server.properties
## 增加下列配置信息
broker.id=3
delete.topic.enable=true
auto.create.topic.enable = true
listeners=PLAINTEXT://10.12.100.128:9092
log.dirs=/opt/kafka/kafkaLog
message.max.byte=5242880
default.replication.factor=2
replica.fetch.max.bytes=5242880
zookeeper.connect=10.12.100.126:2181,10.12.100.127:2181,10.12.100.128:21814 配置分布式集群外网访问
# 三台服务器操作一致
vi /etc/hosts
10.12.100.126 server1
10.12.100.127 server2
10.12.100.128 server3
47.90.133.76 server1
47.90.133.77 server2
47.90.133.78 server3
# kafka
# vi server.properties
#node1
broker.id=1
delete.topic.enable=true
auto.create.topic.enable = true
port = 9092
listeners=PLAINTEXT://server1:9092
zookeeper.connect=10.12.100.126 :2181,10.12.100.127:2181,10.12.100.1268:2181
#zookeeper
# zoo.cfg
server.1= 10.12.100.126 :2888:3888
server.2= 10.12.100.127:2889:3889
server.3= 10.12.100.128:2890:3890
# node2
broker.id=2
delete.topic.enable=true
auto.create.topic.enable = true
port = 9092
listeners=PLAINTEXT://server2:9092
zookeeper.connect=10.12.100.126 :2181,10.12.100.127:2181,10.12.100.1268:2181
#zookeeper
# zoo.cfg
server.1= 10.12.100.126 :2888:3888
server.2= 10.12.100.127:2889:3889
server.3= 10.12.100.128:2890:3890
#node3
broker.id=3
delete.topic.enable=true
auto.create.topic.enable = true
port = 9092
listeners=PLAINTEXT://server3:9092
zookeeper.connect=10.12.100.126 :2181,10.12.100.127:2181,10.12.100.1268:2181
#zookeeper
# zoo.cfg
server.1= 10.12.100.126 :2888:3888
server.2= 10.12.100.127:2889:3889
server.3= 10.12.100.128:2890:3890测试验证
sh kafka-console-producer.sh --broker-list server1:9092, server2:9092, server3:9092 --topic test #hostname生产
sh kafka-console-consumer.sh --zookeeper server1:2181, server2:2181, server3:2181 --topic test --from-beginning #hostname消费