README.md

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
• Grafana Dashboard
• Contribute
• Donation
• License

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 kafka.version 1.0.0 Kafka broker version 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 group.filter .* Regex that determines which consumer groups 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

Metrics output example

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

Topics

Metrics details

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

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

Grafana Dashboard

Grafana Dashboard ID: 7589, name: Kafka Exporter Overview.

For details of the dashboard please see Kafka Exporter Overview.

Contribute

If you like Kafka Exporter, please give me a star. This will help more people know Kafka Exporter.

Please feel free to send me pull requests.

Donation

Your donation will encourage me to continue to improve Kafka Exporter. Support Alipay donation.

License

Code is licensed under the Apache License 2.0.