Confluent-Kafka Python : How to list all topics programmatically

Question

I have a kafka broker running in my local system. To communicate with the broken using my Django based web application I am using confluent-kafka wrapper. However by browsing through the admin api, I could not find out any api for listing kafka topics. (The topics are created pragmatically and are dynamic).

Is there any way I could list them within my program? The requirement is that, if my worker reboots all assigned consumers listening to those topics will have to be re-initialized so I want to loop to all the topics and assign a consumer to each.

Answer 1

Two ways you can achieve it:

from confluent_kafka import Consumer

consummer_config = {
    'bootstrap.servers': 'localhost:9092',
    'group.id': 'group1'
}
consumer = Consumer(consummer_config)
consumer.list_topics().topics

This will return a dictionary something like this:

{'raw_request': TopicMetadata(raw_request, 4 partitions),
 'raw_requests': TopicMetadata(raw_requests, 1 partitions),
 'idw': TopicMetadata(idw, 1 partitions),
 '__consumer_offsets': TopicMetadata(__consumer_offsets, 50 partitions)}

the other way is already posted by @NYCeyes

Answer 2

Try searching again for list_topics

https://docs.confluent.io/5.2.1/clients/confluent-kafka-python/index.html#confluent_kafka.Consumer.list_topics

https://docs.confluent.io/5.2.1/clients/confluent-kafka-python/index.html#confluent_kafka.Producer.list_topics

Answer 3

Here is how to do it:

>>> from confluent_kafka.admin import AdminClient

>>> conf = {'bootstrap.servers': 'vps01:9092,vps02:9092,vps03:9092'}
>>> kadmin = AdminClient(conf)

>>> kadmin.list_topics().topics # Returns a dict(). See example below.
{'topic01': TopicMetadata(topic01, 3 partitions),}

I hope that helps.