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kafka_exporter

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

Table of Contents

Compatibility

Support Apache Kafka version 0.10.1.0 (and later).

Dependency

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 2.0.0 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
sasl.mechanism SASL mechanism can be plain, scram-sha512, scram-sha256
sasl.service-name Service name when using Kerberos Auth
sasl.kerberos-config-path Kerberos config path
sasl.realm Kerberos realm
sasl.keytab-path Kerberos keytab file path
sasl.kerberos-auth-type Kerberos auth type. Either 'keytabAuth' or 'userAuth'
tls.enabled false Connect to Kafka using TLS
tls.server-name Used to verify the hostname on the returned certificates unless tls.insecure-skip-tls-verify is given. The kafka server's name should be given
tls.ca-file The optional certificate authority file for Kafka TLS client authentication
tls.cert-file The optional certificate file for Kafka client authentication
tls.key-file The optional key file for Kafka client authentication
tls.insecure-skip-tls-verify false If true, the server's certificate will not be checked for validity
server.tls.enabled false Enable TLS for web server
server.tls.mutual-auth-enabled false Enable TLS client mutual authentication
server.tls.ca-file The certificate authority file for the web server
server.tls.cert-file The certificate file for the web server
server.tls.key-file The key file for the web server
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.enable-sarama false Turn on Sarama logging
use.consumelag.zookeeper false if you need to use a group from zookeeper
zookeeper.server localhost:2181 Address (hosts) of zookeeper server
kafka.labels Kafka cluster name
refresh.metadata 30s Metadata refresh interval
offset.show-all true Whether show the offset/lag for all consumer group, otherwise, only show connected consumer groups
concurrent.enable false If true, all scrapes will trigger kafka operations otherwise, they will share results. WARN: This should be disabled on large clusters
topic.workers 100 Number of topic workers
verbosity 0 Verbosity log level

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

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.

Contributors

Thanks goes to these wonderful people:

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.