如何将 Python 使用者连接到 AWS MSK [关闭]

Posted 2023-03-10

【中文标题】如何将 Python 使用者连接到 AWS MSK [关闭]

【英文标题】：How to connect Python consumer to AWS MSK [closed]

【发布时间】：2021-05-28 05:10:27

【问题描述】：

我正在尝试将我的 python 使用者连接到 AWS MSK 集群。我该怎么做？

运行 AWS MSK 集群 我正在尝试使用 python 和 kafka python 从 MSK 集群中消费消息。

我遇到的错误

Traceback (most recent call last):
  File "consumer.py", line 23, in <module>
    for message in consumer:
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/consumer/group.py", line 1193, in __next__
    return self.next_v2()
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/consumer/group.py", line 1201, in next_v2
    return next(self._iterator)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/consumer/group.py", line 1116, in _message_generator_v2
    record_map = self.poll(timeout_ms=timeout_ms, update_offsets=False)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/consumer/group.py", line 655, in poll
    records = self._poll_once(remaining, max_records, update_offsets=update_offsets)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/consumer/group.py", line 675, in _poll_once
    self._coordinator.poll()
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/coordinator/consumer.py", line 270, in poll
    self.ensure_coordinator_ready()
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/coordinator/base.py", line 258, in ensure_coordinator_ready
    self._client.poll(future=future)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/client_async.py", line 582, in poll
    self._maybe_connect(node_id)
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/client_async.py", line 392, in _maybe_connect
    conn.connect()
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/conn.py", line 429, in connect
    if self._try_handshake():
  File "/home/ubuntu/.local/lib/python3.6/site-packages/kafka/conn.py", line 508, in _try_handshake
    self._sock.do_handshake()
  File "/usr/lib/python3.6/ssl.py", line 1077, in do_handshake
    self._sslobj.do_handshake()
  File "/usr/lib/python3.6/ssl.py", line 689, in do_handshake
    self._sslobj.do_handshake()
OSError: [Errno 0] Error

【问题讨论】：

你试过什么？你被困在哪里了？您是否在搜索引擎中搜索过“Python Kafka”？

目前我在 EC2 中运行 Kafka，并让 python 消费者监听多个主题和处理。但我需要运行 AWS MSK 集群并连接到它。

所以把你Python代码中的Kafka连接地址改成MSK集群地址。如果这不起作用，请在您的问题中添加更多信息。

这不起作用，这就是这里的问题的原因......

如果它不起作用，请在您的问题中提供错误消息。这可能根本不是 Python 问题，而是 AWS 网络配置问题，因此您也需要提供该信息。

【参考方案1】：

使用 kafka-python：

from kafka import KafkaConsumer

if __name__ == '__main__':
    topic_name = 'example-topic'

    consumer = KafkaConsumer(topic_name, auto_offset_reset='earliest',
                             bootstrap_servers=['kafka2:9092'], api_version=(0, 10), consumer_timeout_ms=1000)
    for msg in consumer:
        print(msg.value)

    if consumer is not None:
        consumer.close()

---

from time import sleep

from kafka import KafkaProducer

# publish messages on topic
def publish_message(producer_instance, topic_name, key, value):
    try:
        key_bytes = bytes(key, encoding='utf-8')
        value_bytes = bytes(value, encoding='utf-8')
        producer_instance.send(topic_name, key=key_bytes, value=value_bytes)
        producer_instance.flush()
        print('Message ' + key + ' published successfully.')
    except Exception as ex:
        print('Exception in publishing message')
        print(str(ex))

# establish kafka connection
def connect_kafka_producer():
    _producer = None
    try:
        _producer = KafkaProducer(bootstrap_servers=['kafka1:9092'])
    except Exception as ex:
        print('Exception while connecting Kafka')
        print(str(ex))
    finally:
        return _producer

if __name__ == '__main__':
    kafka_producer = connect_kafka_producer()
    x = 0
    while True:
        publish_message(kafka_producer, 'raw_recipes', str(x), 'This is message ' + str(x))
        x += 1
    
    if kafka_producer is not None:
            kafka_producer.close()

【讨论】：

使用 AWS MSK 无法正常工作