一、 Kafka常用操作命令

? 查看当前服务器中的所有topic

[root@hadoop3 kafka]# bin/kafka-topics.sh --list --zookeeper hadoop11:2181
[root@hadoop3 kafka]#

信息写入到
? 创建topic

[root@hadoop3 kafka]# bin/kafka-topics.sh --create --zookeeper hadoop11:2181 --replication-factor 1 -partitions 1 --topic test
Created topic "test".
[root@hadoop3 kafka]# bin/kafka-topics.sh --list --zookeeper hadoop11:2181
test

通过上面，可以看到已经创建了一个test的topic

? 删除topic

[root@hadoop2 kafka]# bin/kafka-topics.sh --create --zookeeper hadoop11:2181 --replication-factor 1 -partitions 1 --topic test2
Created topic "test2".
[root@hadoop2 kafka]# bin/kafka-topics.sh --list --zookeeper hadoop11:2181
itheima
test
test2
[root@hadoop2 kafka]# bin/kafka-topics.sh --delete --zookeeper hadoop11:2181 --topic test2
Topic test2 is marked for deletion.
Note: This will have no impact if delete.topic.enable is not set to true.
[root@hadoop2 kafka]# bin/kafka-topics.sh --list --zookeeper hadoop11:2181
itheima
test
[root@hadoop2 kafka]#

需要server.properties中设置delete.topic.enable=true否则只是标记删除或者直接重启。
? 通过shell命令发送消息
要注意的是要指定topic，表示要在哪个topic中生产消息，这里的topic需要时上面创建的topic

[root@hadoop3 kafka]# bin/kafka-console-producer.sh --broker-list hadoop1:9092 --topic test
asdfasdfasd
asdfasdf
asdfasdf
toto test
tuto test2

注意命令中指定的–block-list hadoop1:9092,当改成hadoop2:9092时，也可以。

? 通过shell消费消息
要指明的是要使用哪个topic中的数据，这里的topic需要时上面创建的topic：

[root@hadoop3 kafka]# sh bin/kafka-console-consumer.sh --zookeeper hadoop11:2181 --from-beginning --topic test
asdfasdfasd
asdfasdf
asdfasdf
toto test
tuto test2

注意：这里要指定消费那个topic，这里使用的是test.

? 查看消费位置

[root@hadoop3 kafka]# sh bin/kafka-run-class.sh kafka.tools.ConsumerOffsetChecker --zookeeper hadoop11:2181 --group testGroup

? 查看某个Topic的详情

[root@hadoop3 kafka]# sh bin/kafka-topics.sh --topic test --describe --zookeeper hadoop11:2181
Topic:test  PartitionCount:1    ReplicationFactor:1 Configs:
    Topic: test Partition: 0    Leader: 0   Replicas: 0 Isr: 0
[root@hadoop3 kafka]#

? 对分区数进行修改

[root@hadoop3 kafka]# bin/kafka-topics.sh --zookeeper hadoop11:2181 -alter --partitions 15 --topic test
WARNING: If partitions are increased for a topic that has a key,the partition logic or ordering of the messages will be affected
Adding partitions succeeded!
[root@hadoop3 kafka]#