Kafka操作之kafka-topics
基本参数
·
目录
简介
kafka-topics.bat 脚本负责主题（topic）相关操作。通过kafka-run-class 调用kafka.admin.TopicCommand类。
操作
创建 --create
--create 创建
--zookeeper zookeeper地址
--replication-factor 副本数
--partitions 分区数量
因为该环境非集群环境，所以这里副本数设置为1。
D:\DEV\MQ\kafka_2.12-2.3.0\kafka_2.12-2.3.0\bin\windows>kafka-topics.bat --create --zookeeper localhost:2181 --topic Hello-Kafka --partitions 5 --replication-factor 1
Created topic Hello-Kafka.
创建完成后，可看到logs目录下生成了5个新的目录，命名规则为TopicsName-分区ID。
列表 --list
--list 查看
D:\DEV\MQ\kafka_2.12-2.3.0\kafka_2.12-2.3.0\bin\windows>kafka-topics.bat --list --zookeeper localhost:2181
Hello-Kafka
__consumer_offsets
详细信息 --describe
--describe 查看
--topic 指定查看哪个主题，如果不写该参数则会显示全部主题。
D:\DEV\MQ\kafka_2.12-2.3.0\kafka_2.12-2.3.0\bin\windows>kafka-topics.bat --zookeeper localhost:2181 --describe --topic Hello-Kafka
Topic:Hello-Kafka PartitionCount:5 ReplicationFactor:1 Configs:
Topic: Hello-Kafka Partition: 0 Leader: 0 Replicas: 0 Isr: 0
Topic: Hello-Kafka Partition: 1 Leader: 0 Replicas: 0 Isr: 0
Topic: Hello-Kafka Partition: 2 Leader: 0 Replicas: 0 Isr: 0
Topic: Hello-Kafka Partition: 3 Leader: 0 Replicas: 0 Isr: 0
Topic: Hello-Kafka Partition: 4 Leader: 0 Replicas: 0 Isr: 0PartitionCount：分区个数。
ReplicationFactor：副本个数。
Partition：分区编号，从 0 开始递增。
Leader：当前 分区起作用的 breaker.id。
Replicas: 当前副本数据所在的 breaker.id，是一个列表，排在最前面的其作用。
Isr：当前 kakfa 集群中可用的 breaker.id 列表。
删除 --delete
--delete 删除
D:\DEV\MQ\kafka_2.12-2.3.0\kafka_2.12-2.3.0\bin\windows>kafka-topics.bat --delete --topic Hello-Kafka --zookeeper localhost:2181
Topic Hello-Kafka is marked for deletion.
Note: This will have no impact if delete.topic.enable is not set to true.如果 delete.topic.enable = true
则会立刻删除掉该主题，否则只会标记为删除，并不会真正删除。需要到zk中删除该topic。
修改 --alter
新增分区
分区从5改为6
D:\DEV\MQ\kafka_2.12-2.3.0\kafka_2.12-2.3.0\bin\windows>kafka-topics.bat --alter --zookeeper localhost:2181 --topic Hello-Kafka --partitions 6
WARNING: If partitions are increased for a topic that has a key, the partition logic or ordering of the messages will be affected
Adding partitions succeeded!
减少分区 - 不可能
D:\DEV\MQ\kafka_2.12-2.3.0\kafka_2.12-2.3.0\bin\windows>kafka-topics.bat --alter --zookeeper localhost:2181 --topic Hello-Kafka --partitions 5
WARNING: If partitions are increased for a topic that has a key, the partition logic or ordering of the messages will be affected
Error while executing topic command : The number of partitions for a topic can only be increased. Topic Hello-Kafka currently has 6 partitions, 5 would not be an increase.
[2021-06-03 23:19:28,955] ERROR org.apache.kafka.common.errors.InvalidPartitionsException: The number of partitions for a topic can only be increased. Topic Hello-Kafka currently has 6 partitions, 5 would not be an increase.
(kafka.admin.TopicCommand$)
基本参数
D:\DEV\MQ\kafka_2.12-2.3.0\kafka_2.12-2.3.0\bin\windows>kafka-topics.bat
Create, delete, describe, or change a topic.
Option Description
------ -----------
--alter Alter the number of partitions,
replica assignment, and/or
configuration for the topic.
--at-min-isr-partitions if set when describing topics, only
show partitions whose isr count is
equal to the configured minimum. Not
supported with the --zookeeper
option.
--bootstrap-server <String: server to REQUIRED: The Kafka server to connect
connect to> to. In case of providing this, a
direct Zookeeper connection won't be
required.
--command-config <String: command Property file containing configs to be
config property file> passed to Admin Client. This is used
only with --bootstrap-server option
for describing and altering broker
configs.
--config <String: name=value> A topic configuration override for the
topic being created or altered.The
following is a list of valid
configurations:
cleanup.policy
compression.type
delete.retention.ms
file.delete.delay.ms
flush.messages
flush.ms
follower.replication.throttled.
replicas
index.interval.bytes
leader.replication.throttled.replicas
max.message.bytes
message.downconversion.enable
message.format.version
message.timestamp.difference.max.ms
message.timestamp.type
min.cleanable.dirty.ratio
min.compaction.lag.ms
min.insync.replicas
preallocate
retention.bytes
retention.ms
segment.bytes
segment.index.bytes
segment.jitter.ms
segment.ms
unclean.leader.election.enable
See the Kafka documentation for full
details on the topic configs.It is
supported only in combination with --
create if --bootstrap-server option
is used.
--create Create a new topic.
--delete Delete a topic
--delete-config <String: name> A topic configuration override to be
removed for an existing topic (see
the list of configurations under the
--config option). Not supported with
the --bootstrap-server option.
--describe List details for the given topics.
--disable-rack-aware Disable rack aware replica assignment
--exclude-internal exclude internal topics when running
list or describe command. The
internal topics will be listed by
default
--force Suppress console prompts
--help Print usage information.
--if-exists if set when altering or deleting or
describing topics, the action will
only execute if the topic exists.
Not supported with the --bootstrap-
server option.
--if-not-exists if set when creating topics, the
action will only execute if the
topic does not already exist. Not
supported with the --bootstrap-
server option.
--list List all available topics.
--partitions <Integer: # of partitions> The number of partitions for the topic
being created or altered (WARNING:
If partitions are increased for a
topic that has a key, the partition
logic or ordering of the messages
will be affected
--replica-assignment <String: A list of manual partition-to-broker
broker_id_for_part1_replica1 : assignments for the topic being
broker_id_for_part1_replica2 , created or altered.
broker_id_for_part2_replica1 :
broker_id_for_part2_replica2 , ...>
--replication-factor <Integer: The replication factor for each
replication factor> partition in the topic being created.
--topic <String: topic> The topic to create, alter, describe
or delete. It also accepts a regular
expression, except for --create
option. Put topic name in double
quotes and use the '\' prefix to
escape regular expression symbols; e.
g. "test\.topic".
--topics-with-overrides if set when describing topics, only
show topics that have overridden
configs
--unavailable-partitions if set when describing topics, only
show partitions whose leader is not
available
--under-min-isr-partitions if set when describing topics, only
show partitions whose isr count is
less than the configured minimum.
Not supported with the --zookeeper
option.
--under-replicated-partitions if set when describing topics, only
show under replicated partitions
--version Display Kafka version.
--zookeeper <String: hosts> DEPRECATED, The connection string for
the zookeeper connection in the form
host:port. Multiple hosts can be
given to allow fail-over.
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