Kafka cluster changes#342
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feat: Add more brokertopic and controller metrics
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The cluster metrics are collected from the following MBeans:
kafka.controller:name=ActiveBrokerCount,type=KafkaController- The total number of brokers currently active in the cluster.kafka.controller:name=OfflinePartitionsCount,type=KafkaController- The total number of partitions across the cluster that do not have an active leader.kafka.controller:name=PreferredReplicaImbalanceCount,type=KafkaController- A key health metric indicating how many partitions are not being led by their preferred replica, which can impact load distribution.kafka.controller:name=GlobalTopicCount,type=KafkaController- The total number of topics in the cluster.kafka.controller:name=GlobalPartitionCount,type=KafkaController- The total number of partitions across all topics in the cluster.kafka.controller:name=ActiveControllerCount,type=KafkaController- Should be 1 in a healthy cluster, confirming a single active controller.kafka.controller:name=FencedBrokerCount,type=KafkaController- The number of brokers considered inactive or "fenced" by the controller.kafka.controller:name=UncleanLeaderElectionsPerSec,type=ControllerStats- A critical metric indicating potential data loss events across the cluster.kafka.coordinator.group:name=NumGroups,type=GroupMetadataManager- The total number of consumer groups known to the coordinator.kafka.coordinator.group:name=NumOffsets,type=GroupMetadataManager- The total number of offsets stored by the coordinator.NumGroupsStable,NumGroupsPreparingRebalance, andNumGroupsDead.kafka.server:name=ClusterId,type=KafkaServer- This provides the unique ID for the Kafka cluster, which would be an essential attribute for the KafkaClusterSample.