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Premise:zk

What is kafka?

Baidu Encyclopedia

Kafka is a distributed, partitioned, multi-replica log submission service. It provides the functionality of a messaging system through a unique design.

The goal is to provide a unified, high-throughput, low-latency platform for processing real-time data.

Kafka is a distributed streaming media platform.

mounting configuration

host list

hostnameipmaster192.168.3.58slave1192.168.3.54slave2192.168.3.31

Download kafka

cd /data

wget http://mirrors.hust.edu.cn/apache/kafka/1.0.0/kafka_2.11-1.0.0.tgz

decompression

tar axf kafka_2.11-1.0.0.tgz

Create Log Storage Directory

mkdir -p /data/kafka_2.11-1.0.0/logs

Setting environment variables (every node changes)

vim /etc/profile

#kafkaexport KAFKA_HOME=/data/kafka_2.11-1.0.0export PATH=$PATH:${KAFKA_HOME}/bin

source /etc/profile

modify the configuration file

cd kafka_2.11-1.0.0/config/

Modify zookeeper. properties (overwrite zookeeper's configuration file zoo.conf directly)

grep -v "^#" zookeeper.properties

dataDir=/data/zookeeper/datadataLogDir=/data/zookeeper/logsclientPort=2181tickTime=2000initLimit=10syncLimit=5server.1=master:2887:3887 server.2=slave1:2887:3887server.3=slave2:2887:3887

vim server.properties

#ID number, unique in the cluster, generally using the last digit of the local ip broker.id=58#"Allow to delete topic, default is false"delete.topic.enable=true#"Server monitoring address, if not set, it will be obtained through java. net.InetAddress.getCanonicalHostName(), port default is 9092"listeners=PLAINTEXT://master: 9092#"Number of network connection processes, appropriately increase"num. network.threads=3#"Number of io connections, Increase "num.io.threads=8#"socket send buffer size "socket.send.buffer.bytes=102400#"socket receive buffer size "socket.receive.buffer.bytes=102400#"socket response buffer size "socket.request.max.bytes=104857600#" log file storage path "log.dirs=/data/kafka_2.11-1.0.0/logs#" Number of copies, allowing larger parallel consumption, cannot be greater than node data "num.partitions=2#" Number of threads per directory "num.recovery.threads.per.data.dir=1#" Number of topic metadata copies, Recommended> 1"offsets.topic.replication.factor=3transaction.state.log.replication.factor=3transaction.state.log.min.isr=3#" log cleanup method "log.cleanup.policy = delete#" log retention time "log.retention.hours=30#" log maximum " log.segment.bytes=1073741824#"Check log time" log.retention.check.interval.ms = 30000#"zookeeper connection"zookeeper.connect=master:2181,slave1:2181,slave2:2181#"zookeeper connection timeout" zookeeper.connection.timeout.ms =6000#"Sync delay" group.initial.rebalance.delay.ms =0

scp files to two other machines

scp -r /data/kafka_2.11-1.0.0 slave1:/data

scp -r /data/kafka_2.11-1.0.0 slave2:/data

slave1 and slave2 modify server.properties

modify its

broker.id

listeners

Slave1

broker.id=54listeners=PLAINTEXT://slave1:9092

Start kafka (per node)(takes up windows)

kafka-server-start.sh /data/kafka_2.11-1.0.0/config/server.properties

Background launch kafka (used in production environments)

nohup kafka-server-start.sh /data/kafka_2.11-1.0.0/config/server.properties 2&> /data/kafka_2.11-1.0.0/logs/kafka.log &

Close kafka

kafka-server-stop.sh

create a topic

kafka-topics.sh --create --zookeeper master:2181,slave1:2181,slave2:2181 --partitions 3 --replication-factor 3 --topic test

View topic

kafka-topics.sh --list --zookeeper master:2181,slave1:2181,slave2:2181

test

Creating a producer

kafka-console-producer.sh --broker-list master:9092,slave1:9092,slave2:9092 --topic producerest

Create consumer on another machine

kafka-console-consumer.sh --zookeeper master:2181,slave1:2181,slave2:2181 --topic producerest --from-beginning

consumer, consumer

Use Ctrl+C to exit

reference

Detailed configuration (official document): kafka.apache.org/documentation/#configuration

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