如何徹底刪除Kafka中的topic (marked for deletion)
工作中因為各種原因, 例如topic中訊息堆積的太多,或者kafka所在磁碟空間滿了等等,可能需要徹底清理一下kafka topic,那麼如何徹底刪除topic?
方法一(配置delete.topic.enable=true)
修改kafaka配置檔案server.properties, 新增delete.topic.enable=true,重啟kafka,之後通過kafka命令列就可以直接刪除topic
通過命令列刪除topic:
./bin/kafka-topics.sh --delete --zookeeper {zookeeper server} --topic {topic name}
方法二(沒有配置delete.topic.enable=true)
1、通過命令列刪除topic:
./bin/kafka-topics.sh --delete --zookeeper {zookeeper server} --topic {topic name}
因為kafaka配置檔案中server.properties沒有配置delete.topic.enable=true,此時的刪除並不是真正的刪除,只是把topic標記為:marked for deletion
你可以通過命令:./bin/kafka-topics --zookeeper {zookeeper server} --list 來檢視所有topic
2、刪除kafka儲存目錄(server.properties檔案log.dirs配置,預設為"/tmp/kafka-logs")相關topic目錄
3, 若想真正刪除它,需要登入zookeeper客戶端:
命令:./bin/zkCli.sh
找到topic所在的目錄:ls /brokers/topics
執行命令:rmr /brokers/topics/{topic name}即可,此時topic被徹底刪除。
另外被標記為marked for deletion的topic你可以在zookeeper客戶端中通過命令獲得:ls /admin/delete_topics/{topic name},如果你刪除了此處的topic,那麼marked for deletion 標記消失
zookeeper 的config中也有有關topic的資訊: ls /config/topics/{topic name}暫時不知道有什麼用
總結
徹底刪除topic:
1、確保kafka的配置檔案server.proeprties中設定delete.topic.enable=true,如果沒有, 確保cluster的所有kafka配置檔案設定該引數並重啟,然後直接通過命令刪除,如果命令刪除不了,直接通過zookeeper命令列刪除掉broker下的topic。
2、刪除kafka儲存目錄(server.properties檔案log.dirs配置,預設為"/tmp/kafka-logs")相關topic目錄
- stop zookeeper & Kafka server,
- then go to ‘kafka-logs’ folder , there you will see list of kafka topic folders, delete folder with topic name
- go to ‘zookeeper-data’ folder , delete data inside that.
- start zookeeper & kafka server again.
2, https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-Isitpossibletodeleteatopic?
Deleting a topic is supported since 0.8.2.x. You will need to enable topic deletion (setting delete.topic.enable to true) on all brokers first.
3, https://cwiki.apache.org/confluence/display/KAFKA/KIP-162+-+Enable+topic+deletion+by+default
4, https://github.com/darrenfu/bigdata/issues/6
*** The only way to delete a topic permanently is as follows: ***
stop the brokers
sudo supervisorctl stop kafka-broker
remove the directories on disk
sudo rm -rf <kafka_data_dir>/<topic_name>*
remove the topic from zookeeper:
bin/zkCli.sh
rmr /config/topics/<topic_name>
rmr /brokers/topics/<topic_name>
rmr /admin/delete_topics/<topic_name>
verify the topic directory is deleted in zookeeper:
ls
start the brokers back up
sudo supervisorctl start kafka-broker
re-create the kafka topic if needed