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]#
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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
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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]#
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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
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注意命令中指定的–block-listhadoop1:9092,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
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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
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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]#
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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]#