kafka集群信息会注册在zk节点上
/kafka/admin
/kafka/admin/delete_topics
/kafka/brokers
/kafka/brokers/ids
/kafka/brokers/seqid
/kafka/brokers/topics
/kafka/brokers/topics/__consumer_offsets
/kafka/brokers/topics/__consumer_offsets/partitions
/kafka/brokers/topics/__consumer_offsets/partitions/0
/kafka/brokers/topics/__consumer_offsets/partitions/0/state
#topic和分区信息
/kafka/brokers/topics/first
/kafka/brokers/topics/sms
/kafka/brokers/topics/sms/partitions
/kafka/brokers/topics/sms/partitions/0
/kafka/brokers/topics/sms/partitions/0/state
#节点信息
/kafka/cluster
/kafka/cluster/id
#配置信息
/kafka/config
/kafka/config/brokers
/kafka/config/changes
/kafka/config/clients
/kafka/config/ips
/kafka/config/topics
/kafka/config/topics/__consumer_offsets
#topic配置
/kafka/config/topics/*
例如：/kafka/config/topics/sms
#其他
/kafka/isr_change_notification
/kafka/latest_producer_id_block
/kafka/log_dir_event_notification
