本文基于Kafka 0.8
在一台机器上构建一个3个节点的kafka集群，并测试producer、consumer在正常情况下的行为，以及在lead broker/follow broker失效情况下的行为1.下载并解压kafka 0.8.0 release$ mkdir kafka$ wgethttp://apache.dataguru.cn/kafka/0.8.0/kafka_2.8.0-0.8.0.tar.gz$ tar -zxvfkafka_2.8.0-0.8.0.tar.gz$cd kafka_2.8.0-0.8.0$lltotal 2560drwxr-xr-x 6 root root 4096 Dec 17 17:44 ./drwxr-xr-x 4 root root 4096 Dec 17 18:20 ../drwxr-xr-x 3 root root 4096 Dec 17 18:16 bin/drwxr-xr-x 2 root root 4096 Dec 17 17:43 config/-rw-r--r-- 1 root root 2520145 Nov 27 06:21 kafka_2.8.0-0.8.0.jardrwxr-xr-x 2 root root 4096 Nov 27 06:21 libs/-rw-r--r-- 1 root root 12932 Nov 27 06:21 LICENSEdrwxr-xr-x 2 root root 4096 Dec 17 18:00 logs/-rw------- 1 root root 47165 Dec 17 18:10 nohup.out-rw-r--r-- 1 root root 162 Nov 27 06:21 NOTICE2.启动一个单节点的zookeeper$nohup bin/zookeeper-server-start.sh config/zookeeper.properties &3. 准备启动一个3个broker节点的kafka集群，因此做如下配置$ cp config/server.properties config/server-1.properties$ cp config/server.properties config/server-2.properties
并做如下修改：
config/server-1.properties:
broker.id=1
port=9093
log.dir=/tmp/kafka-logs-1
config/server-2.properties:
broker.id=2
port=9094
log.dir=/tmp/kafka-logs-2
说明：
broker.id: broker节点的唯一标识
port: broker节点使用端口号
log.dir: 消息目录位置
4. 启动3个broker节点
$ JMX_PORT=9997 bin/kafka-server-start.sh config/server-1.properties &
$ JMX_PORT=9998 bin/kafka-server-start.sh config/server-2.properties &
$ JMX_PORT=9999 bin/kafka-server-start.sh config/server.properties &
5. 创建topic并查看$ bin/kafka-create-topic.sh --zookeeper localhost:2181 --replica 3 --partition 1 --topic 3testcreation succeeded!$ bin/kafka-list-topic.sh --zookeeper localhost:2181topic: 3test partition: 0 leader: 2 replicas: 2,1,0 isr: 2,1,0topic: test partition: 0 leader: 0 replicas: 0 isr: 0topic: test_topic partition: 0 leader: 1 replicas: 0,1,2 isr: 1,2,0说明：partiton： partion id，由于此处只有一个partition，因此partition id 为0leader：当前负责读写的lead broker idrelicas：当前partition的所有replication broker listisr：relicas的子集，只包含出于活动状态的broker6.启动consumer & producer，并在producer启动后的console输入一些信息$bin/kafka-console-consumer.sh --zookeeper localhost:2181 --from-beginning --topic 3testmessage1message3message2$ bin/kafka-console-producer.sh --broker-list localhost:9092,localhost:9093,localhost:9094 --topic 3testmessage1message3message2producer发送的数据consumer都能正常消费7. 干掉follow broker杀掉一个非lead broker（lead broker id为2）$pkill -9 -f server-1.properties查看topic：$ bin/kafka-list-topic.sh --zookeeper localhost:2181topic: 3test partition: 0 leader: 2 replicas: 2,1,0 isr: 2,0topic: test partition: 0 leader: 0 replicas: 0 isr: 0topic: test_topic partition: 0 leader: 2 replicas: 0,1,2 isr: 2,0
此时，存活的broker只有2,0
测试：produce发送消息，consumer能正常接收到
8. 继续干掉leader broker
干掉leader broker后，连续查看topic状态$pkill -9 -f server-2.properties $ bin/kafka-list-topic.sh --zookeeper localhost:2181topic: 3test partition: 0 leader: 2 replicas: 2,1,0 isr: 2,0topic: test partition: 0 leader: 0 replicas: 0 isr: 0topic: test_topic partition: 0 leader: 2 replicas: 0,1,2 isr: 2,0$bin/kafka-list-topic.sh --zookeeper localhost:2181topic: 3test partition: 0 leader: 2 replicas: 2,1,0 isr: 2,0topic: test partition: 0 leader: 0 replicas: 0 isr: 0topic: test_topic partition: 0 leader: 2 replicas: 0,1,2 isr: 2,0$ bin/kafka-list-topic.sh --zookeeper localhost:2181topic: 3test partition: 0 leader: 0 replicas: 2,1,0 isr: 0topic: test partition: 0 leader: 0 replicas: 0 isr: 0topic: test_topic partition: 0 leader: 0 replicas: 0,1,2 isr: 0$bin/kafka-list-topic.sh --zookeeper localhost:2181topic: 3test partition: 0 leader: 0 replicas: 2,1,0 isr: 0topic: test partition: 0 leader: 0 replicas: 0 isr: 0topic: test_topic partition: 0 leader: 0 replicas: 0,1,2 isr: 0杀掉leader broker过了一会，broker 0成为新的leader broker测试：produce发送消息，consumer能正常接收到参考：Kafka
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