[DPE-6575] Add microk8s testing (#21)

Author: phvalguima

lib/charms/kafka/v0/client.py

@@ -77,7 +77,7 @@ def on_kafka_relation_created(self, event: RelationCreatedEvent):
 import time
 import sys
 from functools import cached_property
-from typing import Generator, List, Optional
+from typing import Generator, List, Optional, Any
 
 from kafka import KafkaAdminClient, KafkaConsumer, KafkaProducer
 from kafka.admin import NewTopic
@@ -184,6 +184,10 @@ def _consumer_client(self) -> KafkaConsumer:
             consumer_timeout_ms=15000,
         )
 
+    def describe_cluster(self) -> Any:
+        """Returns the cluster metadata."""
+        return self._admin_client.describe_cluster()
+
     def create_topic(self, topic: NewTopic) -> None:
         """Creates a new topic on the Kafka cluster.