版本 0.9.2
创建topic
bin/kafka-topics.sh --create --topic topic_name --partition 6 --replication-factor 1 -zookeeper 10.27.100.207:2181,10.27.100.144:2181,10.27.100.145:2181
开启console consumer查看消息
bin/kafka-console-consumer.sh --topic rt_live_pcweb -zookeeper 10.27.100.207:2181,10.27.100.144:2181,10.27.100.145:2181 --from-begin
改变topic的partition数， kafka topic的partition数只能增加，不能减少。
[root@ip-10-27-100-100 kafka]# bin/kafka-topics.sh --zookeeper 10.27.100.207:2181,10.27.100.144:2181,10.27.100.145:2181 --alter --topic rt_live_pcweb --partitions 8
WARNING: If partitions are increased for a topic that has a key, the partition logic or ordering of the messages will be affected
Error while executing topic command The number of partitions for a topic can only be increased
kafka.admin.AdminOperationException: The number of partitions for a topic can only be increased
at kafka.admin.AdminUtils$.addPartitions(AdminUtils.scala:98)
at kafka.admin.TopicCommand$$anonfun$alterTopic$1.apply(TopicCommand.scala:109)
at kafka.admin.TopicCommand$$anonfun$alterTopic$1.apply(TopicCommand.scala:93)
at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:60)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
at kafka.admin.TopicCommand$.alterTopic(TopicCommand.scala:93)
at kafka.admin.TopicCommand$.main(TopicCommand.scala:52)
at kafka.admin.TopicCommand.main(TopicCommand.scala)
迁移topic的partition到指定的broker上
1. 将需要迁移的topic按如下格式写成json文件
[root@ip-10-27-111-107 kafka]# cat topics-to-move.json
{"topics":
[{"topic": "rt_live_mobile_new"}],
"version":1
}
2. 执行如下命令，其中 0，1，2，3 为要迁移到的broker id
[root@ip-10-27-111-107 kafka]# bin/kafka-reassign-partitions.sh --zookeeper 10.27.100.207:2181,10.27.100.144:2181,10.27.100.145:2181 --topics-to-move-json-file topics-to-move.json --broker-list "0,1,2,3" --generate
Current partition replica assignment
{"version":1,"partitions":[{"topic":"rt_live_mobile_new","partition":2,"replicas":[4]},{"topic":"rt_live_mobile_new","partition":1,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":6,"replicas":[0]},{"topic":"rt_live_mobile_new","partition":4,"replicas":[6]},{"topic":"rt_live_mobile_new","partition":8,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":7,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":11,"replicas":[5]},{"topic":"rt_live_mobile_new","partition":3,"replicas":[5]},{"topic":"rt_live_mobile_new","partition":0,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":10,"replicas":[4]},{"topic":"rt_live_mobile_new","partition":5,"replicas":[7]},{"topic":"rt_live_mobile_new","partition":9,"replicas":[3]}]}
Proposed partition reassignment configuration
{"version":1,"partitions":[{"topic":"rt_live_mobile_new","partition":2,"replicas":[0]},{"topic":"rt_live_mobile_new","partition":6,"replicas":[0]},{"topic":"rt_live_mobile_new","partition":1,"replicas":[3]},{"topic":"rt_live_mobile_new","partition":8,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":4,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":7,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":11,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":10,"replicas":[0]},{"topic":"rt_live_mobile_new","partition":0,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":3,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":9,"replicas":[3]},{"topic":"rt_live_mobile_new","partition":5,"replicas":[3]}]}
3. 将上面命令的输出（红色部门）存入json文件reassignment.json中
4. 执行如下命令，即将partition都迁移至broker 0，1，2，3 服务器上。
[root@ip-10-27-111-107 kafka]# bin/kafka-reassign-partitions.sh --zookeeper 10.27.100.207:2181,10.27.100.144:2181,10.27.100.145:2181 --reassignment-json-file reassignment.json --execute
Current partition replica assignment
{"version":1,"partitions":[{"topic":"rt_live_mobile_new","partition":2,"replicas":[4]},{"topic":"rt_live_mobile_new","partition":1,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":6,"replicas":[0]},{"topic":"rt_live_mobile_new","partition":4,"replicas":[6]},{"topic":"rt_live_mobile_new","partition":8,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":7,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":11,"replicas":[5]},{"topic":"rt_live_mobile_new","partition":3,"replicas":[5]},{"topic":"rt_live_mobile_new","partition":0,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":10,"replicas":[4]},{"topic":"rt_live_mobile_new","partition":5,"replicas":[7]},{"topic":"rt_live_mobile_new","partition":9,"replicas":[3]}]}
Save this to use as the --reassignment-json-file option during rollback
Successfully started reassignment of partitions {"version":1,"partitions":[{"topic":"rt_live_mobile_new","partition":2,"replicas":[0]},{"topic":"rt_live_mobile_new","partition":4,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":8,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":1,"replicas":[3]},{"topic":"rt_live_mobile_new","partition":6,"replicas":[0]},{"topic":"rt_live_mobile_new","partition":7,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":11,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":3,"replicas":[1]},{"topic":"rt_live_mobile_new","partition":0,"replicas":[2]},{"topic":"rt_live_mobile_new","partition":10,"replicas":[0]},{"topic":"rt_live_mobile_new","partition":5,"replicas":[3]},{"topic":"rt_live_mobile_new","partition":9,"replicas":[3]}]}
5.隔一会之后（partition迁移需要一段时间），执行describe查看，partition已经迁移成功
[root@ip-10-27-111-107 kafka]# bin/kafka-topics.sh --topic rt_live_mobile_new --describe -zookeeper 10.27.100.207:2181,10.27.100.144:2181,10.27.100.145:2181
Topic:rt_live_mobile_new PartitionCount:12 ReplicationFactor:1 Configs:
Topic: rt_live_mobile_new Partition: 0 Leader: 2 Replicas: 2 Isr: 2
Topic: rt_live_mobile_new Partition: 1 Leader: 3 Replicas: 3 Isr: 3
Topic: rt_live_mobile_new Partition: 2 Leader: 0 Replicas: 0 Isr: 0
Topic: rt_live_mobile_new Partition: 3 Leader: 1 Replicas: 1 Isr: 1
Topic: rt_live_mobile_new Partition: 4 Leader: 2 Replicas: 2 Isr: 2
Topic: rt_live_mobile_new Partition: 5 Leader: 3 Replicas: 3 Isr: 3
Topic: rt_live_mobile_new Partition: 6 Leader: 0 Replicas: 0 Isr: 0
Topic: rt_live_mobile_new Partition: 7 Leader: 1 Replicas: 1 Isr: 1
Topic: rt_live_mobile_new Partition: 8 Leader: 2 Replicas: 2 Isr: 2
Topic: rt_live_mobile_new Partition: 9 Leader: 3 Replicas: 3 Isr: 3
Topic: rt_live_mobile_new Partition: 10 Leader: 0 Replicas: 0 Isr: 0
Topic: rt_live_mobile_new Partition: 11 Leader: 1 Replicas: 1 Isr: 1