如何以编程方式获取 Python 中每个 Kafka 主题分区的最新偏移量

Question

我是 Kafka 的新手，想获取每个分区的 Kafka 主题的位置。我在文档中看到 - https://kafka-python.readthedocs.io/en/master/apidoc/KafkaAdminClient.html#kafkaadminclient - 可以通过函数 KafkaAdminClient.list_consumer_group_offsets 获得偏移量，但是我没有看到那里的位置有这样的方法。

有人知道我怎样才能得到它吗？

Answer 1

使用confluent-kafka-python

您可以使用 position:

Retrieve current positions (offsets) for the list of partitions.

from confluent_kafka import Consumer, TopicPartition


consumer = Consumer({"bootstrap.servers": "localhost:9092"})
topic = consumer.list_topics(topic='topicName')
partitions = [TopicPartition('topicName', partition) for partition in list(topic.topics['topicName'].partitions.keys())] 

offset_per_partition = consumer.position(partitions)

或者，您也可以使用 get_watermark_offsets，但您必须一次传递一个分区，因此需要多次调用：

Retrieve low and high offsets for partition.

from confluent_kafka import Consumer, TopicPartition


consumer = Consumer({"bootstrap.servers": "localhost:9092"})
topic = consumer.list_topics(topic='topicName')
partitions = [TopicPartition('topicName', partition) for partition in list(topic.topics['topicName'].partitions.keys())] 

for p in partitions:
    low_offset, high_offset = consumer.get_watermark_offsets(p)
    print(f"Latest offset for partition {f}: {high_offset}")

使用kafka-python

您可以使用 end_offsets:

Get the last offset for the given partitions. The last offset of a partition is the offset of the upcoming message, i.e. the offset of the last available message + 1.

This method does not change the current consumer position of the partitions.

from kafka import TopicPartition
from kafka.consumer import KafkaConsumer


consumer = KafkaConsumer(bootstrap_servers = "localhost:9092" )
partitions= = [TopicPartition('myTopic', p) for p in consumer.partitions_for_topic('myTopic')]
last_offset_per_partition = consumer.end_offsets(partitions)

如果您想遍历所有主题，可以使用以下方法：

from kafka import TopicPartition
from kafka.consumer import KafkaConsumer


kafka_topics = consumer.topics()
for topic in kafka_topics: 
    partitions= = [TopicPartition(topic, p) for p in consumer.partitions_for_topic(topic)]
    last_offset_per_partition = consumer.end_offsets(partitions)

如何以编程方式获取 Python 中每个 Kafka 主题分区的最新偏移量

How to programmatically get latest offset per Kafka topic partition in Python

python

apache-kafka

kafka-topic