修改分区个数：
./kafka-topics.sh --zookeeper 127.0.0.1:2181/kafka/<id_of_kafka> --alter --partitions 10 --topic test_topic
上面命令将test_topic对应的分区数目调整为10个，127.0.0.1是zookeeper的地址，2181是zookeeper端口。
删除topic
./kafka-topics.sh --zookeeper 127.0.0.1:2181/kafka/<id_of_kafka> --delete --topic test_topic
上面命令将主题test_topic标记为删除，但是如果delete.topic.enable没有配置为True，上述命令无效。
修改过期时间：
./kafka-topics.sh --zookeeper 127.0.0.1:2181/kafka/<id_of_kafka> --alter --partitions 10 --topic test_topic --config retention.ms=86400000 --config cleanup.policy=delete
查询topic offset
./kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list <ip:port of kafka instead of zookeeper> --topic topic_to_select --time -1 # 偏移最大值 ./kafka-run-class.sh kafka.tools.GetOffsetShell --broker-list <ip:port of kafka instead of zookeeper> --topic topic_to_select --time -2 # 偏移最小值
查询topic详细信息
./kafka-topics.sh --zookeeper 127.0.0.1:2181/kafka/<id_of_kafka> --describe --topic topic_to_select
look up consumer group info, include messages lag. there is new_consumer and old_consumer param, default is new_consumer.
./kafka-consumer-groups.sh --bootstrap-server 127.0.0.1:9092 --group test_group_id --describe
check config, entity-type could be brokers, topics, users
./kafka-configs.sh --describe --zookeeper 127.0.0.1:2181/kafka/<id_of_kafka> --entity-type topics
set config
Topics have broker-wide configs that apply by default to any topic that doesn't have a config, but topics can also have topic-specific configs that override or complement broker-wide topic configs. Broker-wide topic configs are set in your service.properties file. Topic specific configs are set using the bin/kafka-topics.sh script.
To set retention.ms on a new topic:
bin/kafka-topics.sh --zookeeper zk_host:port/chroot --create --topic my_topic_name --partitions 20 --replication-factor 3 --config retention.ms=-1
modify config of an existing topic:
./kafka-configs.sh --alter --zookeeper 127.0.0.1:2181/kafka/<id_of_kafka> --add-config cleanup.policy=delete --entity-type topic --entity-name <topic_name>
kafka启动关闭
bin/zookeeper-server-start.sh -daemon config/zookeeper.properties # zookeeper 守护进程启动 bin/zookeeper-server-stop.sh # 关闭zookeeper export JMX_PORT=9999 # 设置端口以在kafka mananger显示统计数据 bin/kafka-server-start.sh -daemon config/server.properties # 以守护进程启动kafka bin/kafka-server-stop.sh # 关闭kafka
zookeeper查看kafka节点状态
./zookeeper-shell.sh 172.18.185.123:2181,172.18.185.124:2181 <<< "ls /brokers/ids"
ref: https://stackoverflow.com/questions/48504123/choosing-the-right-cleanup-policy-in-kafka-configuration
https://stackoverflow.com/questions/40146921/command-to-get-kafka-broker-list-from-zookeeper
