前言
操作Kafka之前,先启动Kafka:
方式一:进入Kafka安装目录,常规模式启动:
bin/kafka-server-start.sh config/server.properties
方式二:进入Kafka安装目录,进程守护模式启动kafka:
nohup bin/kafka-server-start.sh config/server.properties >/dev/null 2>&1 &
另外,Kafka的关闭命令:
进入Kafka安装目录,执行:
bin/kafka-server-stop.sh
Python操作Kafka发送字符串
编写Kafka生产者Producer:
# kafka_producer.py
from kafka import KafkaProducer
from time import sleep
def start_producer():
producer = KafkaProducer(bootstrap_servers='192.168.0.157:9092')
for i in range(0,100000):
msg = 'msg is ' + str(i)
producer.send('topic_test', msg.encode('utf-8'))
sleep(3)
if __name__ == '__main__':
start_producer()
编写Kafka消费者KafkaConsumer:
# kafka_consumer.py
from kafka import KafkaConsumer
import time
def start_consumer():
consumer = KafkaConsumer('topic_test', bootstrap_servers = '192.168.0.157:9092')
for msg in consumer:
print(msg)
print("topic = %s" % msg.topic) # topic default is string
print("partition = %d" % msg.offset)
print("value = %s" % msg.value.decode()) # bytes to string
print("timestamp = %d" % msg.timestamp)
print("time = ", time.strftime("%Y-%m-%d %H:%M:%S", time.localtime( msg.timestamp/1000 )) )
if __name__ == '__main__':
start_consumer()
以上两个代码,先运行消费者,后运行生产者,就看到消费者在监听生产者发信息。
发送结构化json待续。。
以上。