为什么kafka python无法连接到bluemix消息中心服务？

r8uurelv 于 2021-06-07 发布在 Kafka

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我正在尝试连接到上的bluemix消息中心示例http://bluemix.net. 这个简单的脚本


# !/usr/bin/env python

from kafka import KafkaProducer 
from kafka.errors import KafkaError 

kafka_brokers_sasl = [
  "kafka01-prod01.messagehub.services.us-south.bluemix.net:9093",
  "kafka02-prod01.messagehub.services.us-south.bluemix.net:9093",
  "kafka03-prod01.messagehub.services.us-south.bluemix.net:9093",
  "kafka04-prod01.messagehub.services.us-south.bluemix.net:9093",
  "kafka05-prod01.messagehub.services.us-south.bluemix.net:9093" ] 
sasl_plain_username = "xxxxxxxxxxxxxxx" 
sasl_plain_password = "xxxxxxxxxxxxxxxxxxxxxxxxx" 
sasl_mechanism = 'SASL_PLAINTEXT' 

producer = KafkaProducer(bootstrap_servers = kafka_brokers_sasl,
                         sasl_plain_username = sasl_plain_username,
                         sasl_plain_password = sasl_plain_password,
                         sasl_mechanism = sasl_mechanism )

以以下例外结束：

Traceback (most recent call last): 
  File "./test-mh.py", line 12, in <module> 
    producer = KafkaProducer(bootstrap_servers = kafka_brokers_sasl, sasl_plain_username = sasl_plain_username, sasl_plain_password = sasl_plain_password, sasl_mechanism = sasl_mechanism ) 
  File "/usr/local/lib/python2.7/dist-packages/kafka/producer/kafka.py", line 328, in __init__ 
  **self.config) 
  File "/usr/local/lib/python2.7/dist-packages/kafka/client_async.py", line 202, in __init__ 
    self.config['api_version'] = self.check_version(timeout=check_timeout) 
  File "/usr/local/lib/python2.7/dist-packages/kafka/client_async.py", line 791, in check_version 
    raise Errors.NoBrokersAvailable() 
kafka.errors.NoBrokersAvailable: NoBrokersAvailable

我从messagehub服务凭证对象中获得了kafka\u brokers\u sasl、sasl\u plain\u username和sasl\u plain\u password。我使用的是kafkapython1.3.1，它似乎支持sasl身份验证机制。你知道我做错了什么吗？谢谢。

python apache-kafka ibm-cloud message-hub

来源：https://stackoverflow.com/questions/39411756/why-kafka-python-fails-to-connect-to-bluemix-message-hub-service

1条答案

按热度按时间

kfgdxczn1#

MessageHub要求客户端使用TLS1.2连接进行连接。这意味着指定 security_protocol 参数到 KafkaProducer 同时也是一个 ssl.SSLContext 通过 ssl_context 参数-看起来python kafka客户机创建了一个 SSLv23 默认情况下为上下文。
以下是连接所需的更改：

import ssl
from kafka import KafkaProducer 
from kafka.errors import KafkaError 

kafka_brokers_sasl = [
    "kafka01-prod01.messagehub.services.us-south.bluemix.net:9093",
    "kafka02-prod01.messagehub.services.us-south.bluemix.net:9093",
    "kafka03-prod01.messagehub.services.us-south.bluemix.net:9093",
    "kafka04-prod01.messagehub.services.us-south.bluemix.net:9093",
    "kafka05-prod01.messagehub.services.us-south.bluemix.net:9093" ] 
sasl_plain_username = "xxxxxxxxxxxxxxx" 
sasl_plain_password = "xxxxxxxxxxxxxxxxxxxxxxxxx" 

sasl_mechanism = 'PLAIN'       # <-- changed from 'SASL_PLAINTEXT'
security_protocol = 'SASL_SSL'

# Create a new context using system defaults, disable all but TLS1.2

context = ssl.create_default_context()
context.options &= ssl.OP_NO_TLSv1
context.options &= ssl.OP_NO_TLSv1_1

producer = KafkaProducer(bootstrap_servers = kafka_brokers_sasl,
                         sasl_plain_username = sasl_plain_username,
                         sasl_plain_password = sasl_plain_password,
                         security_protocol = security_protocol,
                         ssl_context = context,
                         sasl_mechanism = sasl_mechanism)

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为什么kafka python无法连接到bluemix消息中心服务？

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