Kafka的SASL_SSL集群上的弹性负载均衡器为Kafka REST代理

下面是一个使用Kafka REST代理的示例代码，该代理可以在Kafka的SASL_SSL集群上提供弹性负载均衡。

from kafka import KafkaProducer
from kafka import KafkaConsumer
from kafka import KafkaAdminClient, NewTopic
from kafka.errors import KafkaError
from kafka import KafkaConsumer
import requests

# 创建Kafka topic
def create_topic(topic_name, num_partitions, replication_factor):
    admin_client = KafkaAdminClient(bootstrap_servers='kafka1:9093,kafka2:9093,kafka3:9093', security_protocol='SASL_SSL', sasl_mechanism='PLAIN', sasl_plain_username='admin', sasl_plain_password='admin-secret')
    topic_list = []
    topic_list.append(NewTopic(name=topic_name, num_partitions=num_partitions, replication_factor=replication_factor))
    admin_client.create_topics(new_topics=topic_list, validate_only=False)

# 发送消息到Kafka
def send_message(bootstrap_servers, topic, message):
    producer = KafkaProducer(bootstrap_servers=bootstrap_servers, security_protocol='SASL_SSL', sasl_mechanism='PLAIN', sasl_plain_username='admin', sasl_plain_password='admin-secret')
    producer.send(topic, value=message)
    producer.flush()

# 从Kafka接收消息
def receive_message(bootstrap_servers, topic):
    consumer = KafkaConsumer(topic, bootstrap_servers=bootstrap_servers, security_protocol='SASL_SSL', sasl_mechanism='PLAIN', sasl_plain_username='admin', sasl_plain_password='admin-secret')
    for message in consumer:
        print(message.value)

# 使用Kafka REST代理发送消息
def send_message_rest_proxy(rest_proxy_url, topic, message):
    url = f"{rest_proxy_url}/topics/{topic}"
    headers = {'Content-Type': 'application/vnd.kafka.json.v2+json'}
    data = {'records': [{'value': message}]}
    response = requests.post(url, headers=headers, json=data)
    print(response.json())

# 使用Kafka REST代理接收消息
def receive_message_rest_proxy(rest_proxy_url, topic):
    url = f"{rest_proxy_url}/topics/{topic}"
    headers = {'Content-Type': 'application/vnd.kafka.v2+json'}
    response = requests.get(url, headers=headers)
    messages = response.json()
    for message in messages['records']:
        print(message['value'])

# 创建Kafka topic
create_topic('my_topic', 3, 1)

# 发送消息到Kafka集群
send_message('kafka1:9093,kafka2:9093,kafka3:9093', 'my_topic', 'Hello Kafka!')

# 从Kafka集群接收消息
receive_message('kafka1:9093,kafka2:9093,kafka3:9093', 'my_topic')

# 使用Kafka REST代理发送消息
send_message_rest_proxy('http://kafka-rest-proxy:8082', 'my_topic', 'Hello Kafka REST Proxy!')

# 使用Kafka REST代理接收消息
receive_message_rest_proxy('http://kafka-rest-proxy:8082', 'my_topic')

上述代码使用kafka-python库来与Kafka集群进行交互。create_topic函数用于创建一个Kafka topic。send_message和receive_message函数分别用于发送和接收消息到Kafka集群。send_message_rest_proxy和receive_message_rest_proxy函数使用Kafka REST代理来发送和接收消息。

请注意，在使用Kafka REST代理时，需要确保已正确配置Kafka REST代理的URL，并根据实际情况进行修改。此外，还需要安装requests库，用于发送HTTP请求。

希望对你有所帮助！