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  • kafka主题管理

    若代理设置了 auto.create.topics.enable=true,这样还未创建topic就往kafka发送消息时,

    会自动创建一个 ${num.partitions}个分区和{default.replication.factor}个副本的主题

    创建主题

    1.创建一个名称为“kafka-action”的主题,该主题有两个副本,3个分区:

    [root@docp-n bin]# ./kafka-topics.sh --create --zookeeper docp-n:2181 --replication-factor 2 --partitions 3 --topic kafka-action
    Created topic "kafka-action".
    

     *docp-n:2181  zookeeper所在的ip

    zookeeper 必传参数,多个zookeeper用 ‘,’分开。

    partitions 用于设置主题分区数,每个线程处理一个分区数据

    replication-factor 用于设置主题副本数,每个副本分布在不通节点,不能超过总结点数。如你只有一个节点,但是创建时指定副本数为2,就会报错。

    创建主题时,还可以通过config参数设置主题几倍的配置以覆盖默认配置

    例如:

    kafka-topics.sh --create --zookeeper server-1:2181,server-2:2181 --replacation-factor 2
    
    --partitions 3 --topic config-test --config max.messege.bytes=404800
    

    通过zookeeper客户端可以看到覆盖的相关配置。get /config/topics/config-test

    [root@haha bin]# /data/app/zookeeper/bin/zkCli.sh -server localhost:2181
    
    [zk: localhost:2181(CONNECTED) 2] get /brokers/topics/test2
    {"version":1,"partitions":{"1":[5],"0":[5]}}
    cZxid = 0x25a
    ctime = Thu Nov 01 15:25:29 CST 2018
    mZxid = 0x25a
    mtime = Thu Nov 01 15:25:29 CST 2018
    pZxid = 0x25d
    cversion = 1
    dataVersion = 0
    aclVersion = 0
    ephemeralOwner = 0x0
    dataLength = 44
    numChildren = 1
    

    可以登录zookeeper客户端查看所创建topic元数据信息,“kafka-action”

    [root@docp-n bin]# /data/app/zookeeper/bin/zkCli.sh -server 127.0.0.1:2181
    Connecting to docp-n:2181
    Welcome to ZooKeeper!
    JLine support is enabled
    [zk: docp-n:2181(CONNECTING) 0]
    WATCHER::
    
    WatchedEvent state:SyncConnected type:None path:null
    
    [zk: docp-n:2181(CONNECTED) 0] ls /brokers/topics/kafka-action/partitions
    [0, 1, 2]
    

    2.删除kafka主题

    (1)手动删除log.dir目录下的分区目录,并删除zookeeper客户端对应的节点,/broker/topics/  && /config/topics

      (2)  执行 kafka-topics.sh 脚本删除,如果想通过脚本彻底删除,需要修改启动时加载的配置文件 server.propers中

    delete-topic-enable=true  默认为false,否则并未真正删除

    [root@docp-n bin]# ./kafka-topics.sh --delete --zookeeper docp-n:2181 --topic test
    Topic test is marked for deletion.
    Note: This will have no impact if delete.topic.enable is not set to true.
    

     注意控制台打印的消息

    3.删除主题 

    [root@docp-n bin]# ../bin/kafka-topics.sh --delete --zookeeper 127.0.0.1:2181 --topic test
    Topic test is marked for deletion.
    Note: This will have no impact if delete.topic.enable is not set to true.
    

     4.查看主题

    (1)查看所有主题

    [root@docp-n bin]# ./kafka-topics.sh --list --zookeeper 127.0.0.1:2181
    1ab42b8d882347ef81a19914440bc308
    286a9b791be54ca7bda4b65530fde8b4
    2dfb690e5a514398879894a56f081520
    414a2a3e915b4fd6811a77e6cadf75be
    87a9ba31db734577bef86143e95a8b44
    __consumer_offsets
    b1fe8eb154f5493e90e939dff8031e71
    f53def0af82344b796529ba7ab79fe66
    hello_topic
    kafka-action
    log-format
    test
    

    (2) 查看某个特定主题信息,不指定topic则查询所有

    通过 --describe

    [root@docp-n bin]# ./kafka-topics.sh --describe --zookeeper 127.0.0.1:2181 --topic kafka-action
    Topic:kafka-action	PartitionCount:3	ReplicationFactor:2	Configs:
    	Topic: kafka-action	Partition: 0	Leader: 1	Replicas: 1,5	Isr: 1,5
    	Topic: kafka-action	Partition: 1	Leader: 5	Replicas: 5,0	Isr: 5,0
    	Topic: kafka-action	Partition: 2	Leader: 0	Replicas: 0,1	Isr: 0,1
    

    (3)查看正在同步的主题

    通过 --describe 和 under-replicated-partitions命令组合查看 under-replacation状态

    [root@docp-n bin]# ./kafka-topics.sh --describe --zookeeper 127.0.0.1:2181 --under-replicated-partitions
    

    (4)查看主题覆盖的配置

    通过 describe 和 topics-with-overrides 组合

    [root@docp-n bin]# ./kafka-topics.sh --describe --zookeeper 127.0.0.1:2181 --topics-with-override
    Topic:__consumer_offsets	PartitionCount:50	ReplicationFactor:1	Configs:segment.bytes=104857600,cleanup.policy=compact,compression.type=producer
    
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  • 原文地址:https://www.cnblogs.com/sunshine-long/p/9843492.html
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