kafka_exporter

Kafka exporter for Prometheus. For other metrics from Kafka, have a look at the JMX exporter.

Table of Contents

• Compatibility
• Dependency
• Download
• Compile
  • Build Binary
  • Build Docker Image
• Run
  • Run Binary
  • Run Docker Image
• Flags
  • Notes
• Metrics
  • Brokers
  • Topics
  • Consumer Groups

Compatibility

Support Apache Kafka version 0.10.1.0 (and later).

Dependency

• Prometheus
• Sarama
• Golang
• Dep

Download

Binary can be downloaded from Releases page.

Compile

Build Binary

make

Build Docker Image

make docker

Docker Hub Image

docker pull danielqsj/kafka-exporter:latest

It can be used directly instead of having to build the image yourself. (Docker Hub danielqsj/kafka-exporter)

Run

Run Binary

kafka_exporter --kafka.server=kafka:9092 [--kafka.server=another-server ...]

Run Docker Image

docker run -ti --rm -p 9308:9308 danielqsj/kafka-exporter --kafka.server=kafka:9092 [--kafka.server=another-server ...]

Flags

This image is configurable using different flags

Flag name	Default	Description
kafka.server	kafka:9092	Addresses (host:port) of Kafka server
sasl.enabled	false	Connect using SASL/PLAIN
sasl.handshake	true	Only set this to false if using a non-Kafka SASL proxy
sasl.username		SASL user name
sasl.password		SASL user password
tls.enabled	false	Connect using TLS
tls.ca-file		The optional certificate authority file for TLS client authentication
tls.cert-file		The optional certificate file for client authentication
tls.key-file		The optional key file for client authentication
tls.insecure-skip-tls-verify	false	If true, the server's certificate will not be checked for validity
topic.filter	.*	Regex that determines which topics to collect
web.listen-address	:9308	Address to listen on for web interface and telemetry
web.telemetry-path	/metrics	Path under which to expose metrics
log.level	info	Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal]
log.enable-sarama	false	Turn on Sarama logging

Notes

Boolean values are uniquely managed by Kingpin. Each boolean flag will have a negative complement: --<name> and --no-<name>.

For example:

If you need to disable sasl.handshake, you could add flag --no-sasl.handshake

Metrics

Documents about exposed Prometheus metrics.

For details on the underlying metrics please see Apache Kafka.

Brokers

Metrics details

Name	Exposed informations
kafka_brokers	Number of Brokers in the Kafka Cluster

Metrics output example

# HELP kafka_brokers Number of Brokers in the Kafka Cluster.
# TYPE kafka_brokers gauge
kafka_brokers 3

Topics

Metrics details

Name	Exposed informations
kafka_topic_partitions	Number of partitions for this Topic
kafka_topic_partition_current_offset	Current Offset of a Broker at Topic/Partition
kafka_topic_partition_oldest_offset	Oldest Offset of a Broker at Topic/Partition
kafka_topic_partition_in_sync_replica	Number of In-Sync Replicas for this Topic/Partition
kafka_topic_partition_leader	Leader Broker ID of this Topic/Partition
kafka_topic_partition_leader_is_preferred	1 if Topic/Partition is using the Preferred Broker
kafka_topic_partition_replicas	Number of Replicas for this Topic/Partition
kafka_topic_partition_under_replicated_partition	1 if Topic/Partition is under Replicated

Metrics output example

# HELP kafka_topic_partitions Number of partitions for this Topic
# TYPE kafka_topic_partitions gauge
kafka_topic_partitions{topic="__consumer_offsets"} 50

# HELP kafka_topic_partition_current_offset Current Offset of a Broker at Topic/Partition
# TYPE kafka_topic_partition_current_offset gauge
kafka_topic_partition_current_offset{partition="0",topic="__consumer_offsets"} 0

# HELP kafka_topic_partition_oldest_offset Oldest Offset of a Broker at Topic/Partition
# TYPE kafka_topic_partition_oldest_offset gauge
kafka_topic_partition_oldest_offset{partition="0",topic="__consumer_offsets"} 0

# HELP kafka_topic_partition_in_sync_replica Number of In-Sync Replicas for this Topic/Partition
# TYPE kafka_topic_partition_in_sync_replica gauge
kafka_topic_partition_in_sync_replica{partition="0",topic="__consumer_offsets"} 3

# HELP kafka_topic_partition_leader Leader Broker ID of this Topic/Partition
# TYPE kafka_topic_partition_leader gauge
kafka_topic_partition_leader{partition="0",topic="__consumer_offsets"} 0

# HELP kafka_topic_partition_leader_is_preferred 1 if Topic/Partition is using the Preferred Broker
# TYPE kafka_topic_partition_leader_is_preferred gauge
kafka_topic_partition_leader_is_preferred{partition="0",topic="__consumer_offsets"} 1

# HELP kafka_topic_partition_replicas Number of Replicas for this Topic/Partition
# TYPE kafka_topic_partition_replicas gauge
kafka_topic_partition_replicas{partition="0",topic="__consumer_offsets"} 3

# HELP kafka_topic_partition_under_replicated_partition 1 if Topic/Partition is under Replicated
# TYPE kafka_topic_partition_under_replicated_partition gauge
kafka_topic_partition_under_replicated_partition{partition="0",topic="__consumer_offsets"} 0

Consumer Groups

Metrics details

Name	Exposed informations
kafka_consumergroup_current_offset	Current Offset of a ConsumerGroup at Topic/Partition
kafka_consumergroup_lag	Current Approximate Lag of a ConsumerGroup at Topic/Partition

Metrics output example

# HELP kafka_consumergroup_current_offset Current Offset of a ConsumerGroup at Topic/Partition
# TYPE kafka_consumergroup_current_offset gauge
kafka_consumergroup_current_offset{consumergroup="KMOffsetCache-kafka-manager-3806276532-ml44w",partition="0",topic="__consumer_offsets"} -1

# HELP kafka_consumergroup_lag Current Approximate Lag of a ConsumerGroup at Topic/Partition
# TYPE kafka_consumergroup_lag gauge
kafka_consumergroup_lag{consumergroup="KMOffsetCache-kafka-manager-3806276532-ml44w",partition="0",topic="__consumer_offsets"} 1