Kafka管理工具介绍-白红宇

Kafka管理工具介绍

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发布时间：2019-06-29

本文共 14165 字，大约阅读时间需要 47 分钟。

内部提供了许多管理脚本，这些脚本都放在$KAFKA_HOME/bin目录下，而这些类的实现都是放在源码的kafka/core/src/main/scala/kafka/tools/路径下。

Consumer Offset Checker

　　Consumer Offset Checker主要是运行kafka.tools.ConsumerOffsetChecker类，对应的脚本是kafka-consumer-offset-checker.sh，会显示出Consumer的Group、Topic、分区ID、分区对应已经消费的Offset、logSize大小，Lag以及Owner等信息。

如果运行kafka-consumer-offset-checker.sh脚本的时候什么信息都不输入，那么会显示以下信息：

[iteblog@www.iteblog.com /]$ bin/kafka-consumer-offset-checker.shCheck the offset of your consumers.Option                                  Description                            ------                                  -----------                            --broker-info                           Print broker info                      --group                                 Consumer group.                        --help                                  Print this message.                    --retry.backoff.ms 
    
                 Retry back-off to use for failed                                                 offset queries. (default: 3000)      --socket.timeout.ms 
     
                 Socket timeout to use when querying                                              for offsets. (default: 6000)         --topic                                 Comma-separated list of consumer                                                 topics (all topics if absent).       --zookeeper                             ZooKeeper connect string. (default:                                              localhost:2181)

我们根据提示，输入的命令如下：

[iteblog@www.iteblog.com /]$ bin/kafka-consumer-offset-checker.sh --zookeeper www.iteblog.com:2181 --topic test --group spark --broker-infoGroup           Topic      Pid Offset          logSize         Lag             Ownerspark    test       0   34666914        34674392        7478            nonespark    test       1   34670481        34678029        7548            nonespark    test       2   34670547        34678002        7455            nonespark    test       3   34664512        34671961        7449            nonespark    test       4   34680143        34687562        7419            nonespark    test       5   34672309        34679823        7514            nonespark    test       6   34674660        34682220        7560            noneBROKER INFO2 -> www.iteblog.com:90925 -> www.iteblog.com:90934 -> www.iteblog.com:90947 -> www.iteblog.com:90951 -> www.iteblog.com:90963 -> www.iteblog.com:90976 -> www.iteblog.com:9098

Dump Log Segment

　　有时候我们需要验证日志索引是否正确，或者仅仅想从log文件中直接打印消息，我们可以使用kafka.tools.DumpLogSegments类来实现，先来看看它需要的参数：

[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.DumpLogSegments Parse a log file and dump its contents to the console, useful for debugging a seemingly corrupt log segment.Option                                  Description                            ------                                  -----------                            --deep-iteration                        if set, uses deep instead of shallow                                             iteration                            --files 
    
                  REQUIRED: The comma separated list of                                            data and index log files to be dumped--key-decoder-class                     if set, used to deserialize the keys.                                            This class should implement kafka.                                             serializer.Decoder trait. Custom jar                                           should be available in kafka/libs                                              directory. (default: kafka.                                                    serializer.StringDecoder)            --max-message-size 
     
            Size of largest message. (default:                                               5242880)                             --print-data-log                        if set, printing the messages content                                            when dumping data logs               --value-decoder-class                   if set, used to deserialize the                                                  messages. This class should                                                    implement kafka.serializer.Decoder                                             trait. Custom jar should be                                                    available in kafka/libs directory.                                             (default: kafka.serializer.                                                    StringDecoder)                       --verify-index-only                     if set, just verify the index log                                                without printing its content

　　很明显，我们在使用kafka.tools.DumpLogSegments的时候必须输入--files，这个参数指的就是中Topic分区所在的绝对路径。分区所在的目录由config/server.properties文件中log.dirs参数决定。比如我们想看/home/q/kafka/kafka_2.10-0.8.2.1/data/test-4/00000000000034245135.log日志文件的相关情况可以使用下面的命令：

[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.DumpLogSegments --files /iteblog/data/test-4/00000000000034245135.logDumping /home/q/kafka/kafka_2.10-0.8.2.1/data/test-4/00000000000034245135.logStarting offset: 34245135offset: 34245135 position: 0 isvalid: true payloadsize: 4213 magic: 0 compresscodec: NoCompressionCodec crc: 865449274 keysize: 4213offset: 34245136 position: 8452 isvalid: true payloadsize: 4657 magic: 0 compresscodec: NoCompressionCodec crc: 4123037760 keysize: 4657offset: 34245137 position: 17792 isvalid: true payloadsize: 3921 magic: 0 compresscodec: NoCompressionCodec crc: 541297511 keysize: 3921offset: 34245138 position: 25660 isvalid: true payloadsize: 2290 magic: 0 compresscodec: NoCompressionCodec crc: 1346104996 keysize: 2290offset: 34245139 position: 30266 isvalid: true payloadsize: 2284 magic: 0 compresscodec: NoCompressionCodec crc: 1930558677 keysize: 2284offset: 34245140 position: 34860 isvalid: true payloadsize: 268 magic: 0 compresscodec: NoCompressionCodec crc: 57847488 keysize: 268offset: 34245141 position: 35422 isvalid: true payloadsize: 263 magic: 0 compresscodec: NoCompressionCodec crc: 2964399224 keysize: 263offset: 34245142 position: 35974 isvalid: true payloadsize: 1875 magic: 0 compresscodec: NoCompressionCodec crc: 647039113 keysize: 1875offset: 34245143 position: 39750 isvalid: true payloadsize: 648 magic: 0 compresscodec: NoCompressionCodec crc: 865445580 keysize: 648offset: 34245144 position: 41072 isvalid: true payloadsize: 556 magic: 0 compresscodec: NoCompressionCodec crc: 1174686061 keysize: 556offset: 34245145 position: 42210 isvalid: true payloadsize: 4211 magic: 0 compresscodec: NoCompressionCodec crc: 3691302513 keysize: 4211offset: 34245146 position: 50658 isvalid: true payloadsize: 2299 magic: 0 compresscodec: NoCompressionCodec crc: 2367114411 keysize: 2299offset: 34245147 position: 55282 isvalid: true payloadsize: 642 magic: 0 compresscodec: NoCompressionCodec crc: 4122061921 keysize: 642offset: 34245148 position: 56592 isvalid: true payloadsize: 4211 magic: 0 compresscodec: NoCompressionCodec crc: 3257991653 keysize: 4211offset: 34245149 position: 65040 isvalid: true payloadsize: 2278 magic: 0 compresscodec: NoCompressionCodec crc: 2103489307 keysize: 2278offset: 34245150 position: 69622 isvalid: true payloadsize: 269 magic: 0 compresscodec: NoCompressionCodec crc: 792857391 keysize: 269offset: 34245151 position: 70186 isvalid: true payloadsize: 640 magic: 0 compresscodec: NoCompressionCodec crc: 791599616 keysize: 640

可以看出，这个命令将Kafka中Message中Header的相关信息和偏移量都显示出来了，但是没有看到日志的内容，我们可以通过--print-data-log来设置。如果需要查看多个日志文件，可以以逗号分割。

导出Zookeeper中Group相关的偏移量

　　有时候我们需要导出某个Consumer group各个分区的偏移量，我们可以通过使用Kafka的kafka.tools.ExportZkOffsets类来满足。来看看这个类需要的参数：

[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.ExportZkOffsetsExport consumer offsets to an output file.Option                                  Description                            ------                                  -----------                            --group                                 Consumer group.                        --help                                  Print this message.                    --output-file                           Output file                            --zkconnect                             ZooKeeper connect string. (default:                                              localhost:2181)

我们需要输入Consumer group，Zookeeper的地址以及保存文件路径：

[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.ExportZkOffsets --group spark --zkconnect www.iteblog.com:2181 --output-file ~/offset[iteblog@www.iteblog.com /]$ vim ~/offset /consumers/spark/offsets/test/3:34846274/consumers/spark/offsets/test/2:34852378/consumers/spark/offsets/test/1:34852360/consumers/spark/offsets/test/0:34848170/consumers/spark/offsets/test/6:34857010/consumers/spark/offsets/test/5:34854268/consumers/spark/offsets/test/4:34861572

注意，--output-file参数必须在指定，否则会出错。

通过JMX获取metrics信息

　　我们可以通过kafka.tools.JmxTool类打印出Kafka相关的metrics信息。

[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.JmxToolDump JMX values to standard output.Option Description ------ ----------- --attributes

The whitelist of attributes to query. This is a comma-separated list. If no attributes are specified all objects will be queried. --date-format

The date format to use for formatting the time field. See java.text. SimpleDateFormat for options. --help Print usage information. --jmx-url

The url to connect to to poll JMX data. See Oracle javadoc for JMXServiceURL for details. (default: service:jmx:rmi:///jndi/rmi://: 9999/jmxrmi) --object-name

A JMX object name to use as a query. This can contain wild cards, and this option can be given multiple times to specify more than one query. If no objects are specified all objects will be queried. --reporting-interval

Interval in MS with which to poll jmx stats. (default: 2000)

可以这么使用

[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.JmxTool --jmx-url service:jmx:rmi:///jndi/rmi://www.iteblog.com:1099/jmxrmi

运行上面命令前提是在启动kafka集群的时候指定export JMX_PORT= ，这样才会开启JMX。然后就可以通过上面命令打印出Kafka所有的metrics信息。

Kafka数据迁移工具

　　这个工具主要有两个：kafka.tools.KafkaMigrationTool和kafka.tools.MirrorMaker。第一个主要是用于将Kafka 0.7上面的数据迁移到Kafka 0.8（https://cwiki.apache.org/confluence/display/KAFKA/Migrating+from+0.7+to+0.8）；而后者可以同步两个Kafka集群的数据（https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=27846330）。都是从原端消费Messages，然后发布到目标端。

[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.KafkaMigrationTool --kafka.07.jar kafka-0.7.19.jar --zkclient.01.jar zkclient-0.2.0.jar --num.producers 16 --consumer.config=sourceCluster2Consumer.config --producer.config=targetClusterProducer.config --whitelist=.*[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.MirrorMaker --consumer.config sourceCluster1Consumer.config --consumer.config sourceCluster2Consumer.config --num.streams 2 --producer.config targetClusterProducer.config --whitelist=".*"

日志重放工具

　　这个工具主要作用是从一个Kafka集群里面读取指定Topic的消息，并将这些消息发送到其他集群的指定topic中：

[iteblog@www.iteblog.com /]$ bin/kafka-replay-log-producer.sh Missing required argument "[broker-list]"Option Description ------ ----------- --broker-list

REQUIRED: the broker list must be specified. --inputtopic

REQUIRED: The topic to consume from. --messages

The number of messages to send. (default: -1) --outputtopic

REQUIRED: The topic to produce to --property

A mechanism to pass properties in the form key=value to the producer. This allows the user to override producer properties that are not exposed by the existing command line arguments --reporting-interval

Interval at which to print progress info. (default: 5000) --sync If set message send requests to the brokers are synchronously, one at a time as they arrive. --threads

Number of sending threads. (default: 1)--zookeeper

REQUIRED: The connection string for the zookeeper connection in the form host:port. Multiple URLS can be given to allow fail-over. (default: 127.0.0.1:2181)

Simple Consume脚本

　　kafka-simple-consumer-shell.sh工具主要是使用Simple Consumer API从指定Topic的分区读取数据并打印在终端：

bin/kafka-simple-consumer-shell.sh --broker-list www.iteblog.com:9092 --topic test --partition 0

更新Zookeeper中的偏移量

　　kafka.tools.UpdateOffsetsInZK工具可以更新Zookeeper中指定Topic所有分区的偏移量，可以指定成 earliest或者latest：

[iteblog@www.iteblog.com /]$ bin/kafka-run-class.sh kafka.tools.UpdateOffsetsInZKUSAGE: kafka.tools.UpdateOffsetsInZK$ [earliest | latest] consumer.properties topic

需要指定是更新成earliest或者latest，consumer.properties文件的路径以及topic的名称

转载于:https://www.cnblogs.com/heidsoft/p/7697905.html

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