本文介绍基于docker搭建的confluent-kafka及其python接口的使用。
本文只搭建了一个单Broker的confluent-kafka测试环境,考虑到高可用、高吞吐等因素,正式生产环境一般至少要3个节点。
本文采用的系统配置如下:
- LinuxMint 20.3 (兼容 Ununtu 20.04)
- docker 20.10.21
- docker-compose 2.14.2
- python 3.9.16
- confluent-kafka(python包) 2.1.1
1. 安装docker以及docker-compose
1.1 安装docker
docker-compose依赖于docker,因此需要先安装docker。
curl -fsSL https://test.docker.com -o test-docker.sh
sudo sh test-docker.sh
1.2 安装docker-compose
Compose 是用于定义和运行多容器 Docker 应用程序的工具。通过 Compose,您可以使用 YML 文件来配置应用程序需要的所有服务。然后,使用一个命令,就可以从 YML 文件配置中创建并启动所有服务。
curl -L https://get.daocloud.io/docker/compose/releases/download/v2.14.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
要安装其他版本的 Compose,请替换 v2.14.2。
2. 安装confluent-kafka
新建文件并创建docker-compose.yml文件:
version: '3'
services:
zookeeper:
image: confluentinc/cp-zookeeper:7.0.1
container_name: zookeeper
environment:
ZOOKEEPER_CLIENT_PORT: 2181
ZOOKEEPER_TICK_TIME: 2000
broker:
image: confluentinc/cp-kafka:7.0.1
container_name: broker
ports:
# To learn about configuring Kafka for access across networks see
# https://www.confluent.io/blog/kafka-client-cannot-connect-to-broker-on-aws-on-docker-etc/
- "9092:9092"
depends_on:
- zookeeper
environment:
KAFKA_BROKER_ID: 1
KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_INTERNAL:PLAINTEXT
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092,PLAINTEXT_INTERNAL://broker:29092
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
注意 这里搭建的是本地环境,如果需要从网络中的另一位置访问kafka,需要将KAFKA_ADVERTISED_LISTENERS
中的localhost
换成kafka所在主机的真实地址/域名。
进入该文件夹并运行:
docker-compose -f docker-compose.yml up -d
运行后在docker中看到类似结果说明启动成功:
aa@bb:~/docker_scripts$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e6fbc05d61b1 confluentinc/cp-kafka:7.0.1 "/etc/confluent/dock…" 7 minutes ago Up 7 minutes 0.0.0.0:9092->9092/tcp, :::9092->9092/tcp broker
58b04385f2bf confluentinc/cp-zookeeper:7.0.1 "/etc/confluent/dock…" 7 minutes ago Up 7 minutes 2181/tcp, 2888/tcp, 3888/tcp zookeeper
这里kafka端口为9092。
关闭容器服务:
docker-compose -f docker-compose.yml down
3. python接口使用
3.1 安装依赖包
安装依赖包:
pip3 install confluent-kafka
3.2 创建、查看topic
进入kafka镜像:
docker exec -ti broker bash
查看topic:
[aa@bb ~]$ /bin/kafka-topics --list --bootstrap-server 127.0.0.1:9092
新建名为test001的topic:
[aa@bb ~]$ /bin/kafka-topics --create --bootstrap-server 127.0.0.1:9092 --topic test001 --partitions 2
Created topic test001.
查看topic:
[aa@bb ~]$ /bin/kafka-topics --list --bootstrap-server 127.0.0.1:9092
test001
通过Ctrl
+ P
+ Q
回到终端。
3.3 python接口-broker
创建producer代码producer1.py
:
import socket
from confluent_kafka import Producer
conf = {
'bootstrap.servers': "localhost:9092",
'client.id': socket.gethostname()
}
producer = Producer(conf)
def __publish_delivery_report(err, msg) -> None:
if err is not None:
print(f"send msg:{msg} fail, err is not None")
else:
print(f"send msg{msg} success")
def send_msg(topic: str, data):
producer.produce(topic, data, callback=__publish_delivery_report)
producer.flush()
if __name__ == '__main__':
msg = "hello kafka"
topic = "test001"
send_msg(topic, msg)
运行结果:
aa@bb:~/codes/kafka_test$ python3 producer1.py
send msg<cimpl.Message object at 0x7f8d6fe6acc0> success
3.4 python接口-consumer
创建consumer代码consumer1.py
:文章来源:https://www.toymoban.com/news/detail-741444.html
from confluent_kafka import Consumer
class KafkaConsumer:
def __init__(self, brokers, group):
config = dict()
config['bootstrap.servers'] = brokers
config['group.id'] = group
config['auto.offset.reset'] = 'earliest'
self.consumer = Consumer(config)
def subscribe(self, topics):
self.consumer.subscribe(topics=topics)
def pull(self):
while True:
msg = self.consumer.poll(1.0)
if msg is None:
continue
if msg.error():
print("Consumer error: {}".format(msg.error()))
continue
print('Received message: {}'.format(msg.value().decode('utf-8')))
def close(self):
self.consumer.close()
if __name__ == "__main__":
consumer = KafkaConsumer("127.0.0.1:9092", "test_group1")
consumer.subscribe(['test001'])
consumer.pull()
consumer.close()
运行结果:文章来源地址https://www.toymoban.com/news/detail-741444.html
aa@bb:~/codes/kafka_test$ python3 consumer1.py
Received message: hello kafka
参考链接
- Hello Kafka(八)——Confluent Kafka简介
- Docker Compose | 菜鸟教程
- confluent_kafka生产者 - luckygxf - 博客园
- Hello Kafka(十二)——Python客户端_kafka python客户端_天山老妖的博客-CSDN博客
到了这里,关于基于docker的confluent-kafka搭建及python接口使用的文章就介绍完了。如果您还想了解更多内容,请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章,希望大家以后多多支持TOY模板网!