自带命令实践
尝试实践的kafka知识：
- 创建话题
- 生产消息
- 消费消息
- 话题信息
- 获取消费组
- 获取消费组的offset
自带的命令
# kafka安装目录的bin目录下
# * 代表我们会使用的脚本
connect-distributed.sh kafka-log-dirs.sh kafka-streams-application-reset.sh
connect-standalone.sh kafka-mirror-maker.sh kafka-topics.sh*
kafka-acls.sh kafka-preferred-replica-election.sh kafka-verifiable-consumer.sh
kafka-broker-api-versions.sh kafka-producer-perf-test.sh kafka-verifiable-producer.sh
kafka-configs.sh kafka-reassign-partitions.sh trogdor.sh
kafka-console-consumer.sh* kafka-replay-log-producer.sh windows
kafka-console-producer.sh* kafka-replica-verification.sh zookeeper-security-migration.sh
kafka-consumer-groups.sh* kafka-run-class.sh zookeeper-server-start.sh
kafka-consumer-perf-test.sh kafka-server-start.sh zookeeper-server-stop.sh
kafka-delegation-tokens.sh kafka-server-stop.sh zookeeper-shell.sh*
kafka-delete-records.sh kafka-simple-consumer-shell.sh
创建话题(kafka-topics.sh)
# 创建1个分区1个副本的test话题，这里是副本其实可以理解为broker里至少拥有数量，must >=1
# --zookeeper localhost:2181 （kafka的默认端口:2181）
bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test
# 创建2个分区1个副本的test02话题
bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 2 --topic test02
# 列出所有话题
bin/kafka-topics.sh --list --zookeeper localhost:2181
__consumer_offsets
test
test02
# 注意这里的__consumer_offsets是kafka默认创建的，用于存储kafka消费记录的话题，我们暂时不用理会
# 列出具体话题的信息
bin/kafka-topics.sh --describe --zookeeper localhost:2181 --topic test
Topic:test PartitionCount:1 ReplicationFactor:1 Configs:
Topic: test Partition: 0 Leader: 0 Replicas: 0 Isr: 0
bin/kafka-topics.sh --describe --zookeeper localhost:2181 --topic test02
Topic:test02 PartitionCount:2 ReplicationFactor:1 Configs:
Topic: test02 Partition: 0 Leader: 0 Replicas: 0 Isr: 0
Topic: test02 Partition: 1 Leader: 0 Replicas: 0 Isr: 0
# 从上面的显示 我们可以发现，第一句是显示总体信息，下面缩进显示的是分区信息
消费者(kafka-console-consumer.sh)
# 启动一个消费组消费，这里我们需要开启一个 shell 终端，因为会等待输出
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning
# 等待输出
生产者(kafka-console-consumer.sh)
# 这里我们需要开启一个shell终端，因为会等待输入
bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test
# 待我们输入消息 等待出现>
> msg01
> msg02
> msg03
#注意观察上面的消费者终端，自动输出了我们的消息
msg01
msg02
msg03
查看消费组
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --list
Note: This will not show information about old Zookeeper-based consumers.
console-consumer-25379
console-consumer-73410
console-consumer-27127
console-consumer-61887
console-consumer-61324
# 这里我们再来起一个消费者再次输出（因为之前的消费者我们不知道最新的这次消费组id是多少）
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --list
Note: This will not show information about old Zookeeper-based consumers.
console-consumer-25379
console-consumer-73410
console-consumer-27127
console-consumer-39416 # 这个是我们新起的消费组id，下面我们根据这个消费组来做实践
console-consumer-61887
console-consumer-61324
# 查看消费组的具体信息
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group console-consumer-39416
Note: This will not show information about old Zookeeper-based consumers.
TOPIC PARTITION CURRENT-OFFSET LOG-END-OFFSET LAG CONSUMER-ID HOST CLIENT-ID
test 0 9 9 0 consumer-1-94afec29-5042-4108-8619-ba94812f10a8 /127.0.0.1 consumer-1
# 查看离线的console-consumer-25379消费组
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group console-consumer-25379
Note: This will not show information about old Zookeeper-based consumers.
Consumer group 'console-consumer-25379' has no active members.
TOPIC PARTITION CURRENT-OFFSET LOG-END-OFFSET LAG CONSUMER-ID HOST CLIENT-ID
test 0 5 9 4 - - -
# 查看离线的console-consumer-27127消费组
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group console-consumer-27127
Note: This will not show information about old Zookeeper-based consumers.
Consumer group 'console-consumer-27127' has no active members.
TOPIC PARTITION CURRENT-OFFSET LOG-END-OFFSET LAG CONSUMER-ID HOST CLIENT-ID
test 0 6 9 3 - - -
# 这里我们发现我们每次都会生成一个消费组一个消费者，不方便我们做一个消费组多个消费者测试
启动一个消费组多个消费者
cp config/consumer.properties config/consumer_g1.properties
vim config/consumer_g1.properties
# 修改消费组名
group.id=test-consumer-group => group.id=test-g1
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning --consumer.config config/consumer_g1.properties
msg01
msg02
msg03
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning --consumer.config config/consumer_g1.properties
# 无输出（因为test话题我们只有一个分区，一个分区只能被同个消费组下面的一个消费者消费，所以这个就闲置了）
# 查看消费组
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --list
Note: This will not show information about old Zookeeper-based consumers.
console-consumer-25379
console-consumer-73410
console-consumer-27127
console-consumer-39416
test-g1
console-consumer-61887
console-consumer-61324
# 查看test-g1消费组
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group test-g1
Note: This will not show information about old Zookeeper-based consumers.
TOPIC PARTITION CURRENT-OFFSET LOG-END-OFFSET LAG CONSUMER-ID HOST CLIENT-ID
test 0 9 9 0 consumer-1-43922b0c-34e0-47fe-b597-984c9e6a2884 /127.0.0.1 consumer-1
# 下面我们再开启test02的2个消费组看看情况
# 我们再为test02话题启动2个test-g1消费组的消费者
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test02 --from-beginning --consumer.config config/consumer_g1.properties
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test02 --from-beginning --consumer.config config/consumer_g1.properties
# 查看test-g1消费组
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group test-g1
Note: This will not show information about old Zookeeper-based consumers.
TOPIC PARTITION CURRENT-OFFSET LOG-END-OFFSET LAG CONSUMER-ID HOST CLIENT-ID
test02 0 0 0 0 consumer-1-90ccc960-557a-46ab-a799-58c35ee670d8 /127.0.0.1 consumer-1
test02 1 0 0 0 consumer-1-c6d79321-8212-4594-8a11-353f684c54fc /127.0.0.1 consumer-1
test 0 9 9 0 consumer-1-7a2706f7-a206-4c29-ae1f-3726ad21af96 /127.0.0.1 consumer-1
# 这里你可以在话题test产生一个消息看下，然后再test02再多产生几条消息看下，你会发现test02的2个消费组几乎是负载的消费了消息
消费组的一些信息命令
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group my-group --members --verbose
Note: This will not show information about old Zookeeper-based consumers.
CONSUMER-ID HOST CLIENT-ID #PARTITIONS ASSIGNMENT
consumer-1-b8eeb8bc-6aa6-439b-84d8-0fcbed4a2899 /127.0.0.1 consumer-1 1 test02(1)
consumer-1-7109f789-a5cf-4862-94d0-976146dbc769 /127.0.0.1 consumer-1 1 test(0)
consumer-1-90ccc960-557a-46ab-a799-58c35ee670d8 /127.0.0.1 consumer-1 1 test02(0)
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group my-group --state
Note: This will not show information about old Zookeeper-based consumers.
COORDINATOR (ID) ASSIGNMENT-STRATEGY STATE #MEMBERS
localhost:9092 (0) range Stable 3
bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --delete --group console-consumer-25379
zookeeper（zookeeper-shell.sh）
连接
bin/zookeeper-shell.sh 127.0.0.1:2181
Connecting to 127.0.0.1:2181
Welcome to ZooKeeper!
JLine support is disabled
WATCHER::
WatchedEvent state:SyncConnected type:None path:null
常用命令
ls /
[cluster, controller_epoch, controller, brokers, zookeeper, admin, isr_change_notification, consumers, log_dir_event_notification, latest_producer_id_block, config]
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