UI for Apache Kafka 

Versatile, fast and lightweight web UI for managing Apache Kafka® clusters. Built by developers, for developers.

DISCLAIMER

UI for Apache Kafka is a free tool built and supported by the open-source community. Curated by Provectus, it will remain free and open-source, without any paid features or subscription plans to be added in the future. Looking for the help of Kafka experts? Provectus can help you design, build, deploy, and manage Apache Kafka clusters and streaming applications. Discover Professional Services for Apache Kafka, to unlock the full potential of Kafka in your enterprise!

UI for Apache Kafka is a free, open-source web UI to monitor and manage Apache Kafka clusters.

UI for Apache Kafka is a simple tool that makes your data flows observable, helps find and troubleshoot issues faster and deliver optimal performance. Its lightweight dashboard makes it easy to track key metrics of your Kafka clusters - Brokers, Topics, Partitions, Production, and Consumption.

Set up UI for Apache Kafka with just a couple of easy commands to visualize your Kafka data in a comprehensible way. You can run the tool locally or in the cloud.

Features

• Multi-Cluster Management — monitor and manage all your clusters in one place
• Performance Monitoring with Metrics Dashboard — track key Kafka metrics with a lightweight dashboard
• View Kafka Brokers — view topic and partition assignments, controller status
• View Kafka Topics — view partition count, replication status, and custom configuration
• View Consumer Groups — view per-partition parked offsets, combined and per-partition lag
• Browse Messages — browse messages with JSON, plain text, and Avro encoding
• Dynamic Topic Configuration — create and configure new topics with dynamic configuration
• Configurable Authentification — secure your installation with optional Github/Gitlab/Google OAuth 2.0
• Custom serialization/deserialization plugins - use a ready-to-go serde for your data like AWS Glue or Smile, or code your own!
• Role based access control - manage permissions to access the UI with granular precision
• Data masking - obfuscate sensitive data in topic messages

The Interface

UI for Apache Kafka wraps major functions of Apache Kafka with an intuitive user interface.

Topics

UI for Apache Kafka makes it easy for you to create topics in your browser by several clicks, pasting your own parameters, and viewing topics in the list.

It's possible to jump from connectors view to corresponding topics and from a topic to consumers (back and forth) for more convenient navigation. connectors, overview topic settings.

Messages

Let's say we want to produce messages for our topic. With the UI for Apache Kafka we can send or write data/messages to the Kafka topics without effort by specifying parameters, and viewing messages in the list.

Schema registry

There are 3 supported types of schemas: Avro®, JSON Schema, and Protobuf schemas.

Before producing avro-encoded messages, you have to add an avro schema for the topic in Schema Registry. Now all these steps are easy to do with a few clicks in a user-friendly interface.

Getting Started

To run UI for Apache Kafka, you can use a pre-built Docker image or build it locally.

Configuration

We have plenty of docker-compose files as examples. They're built for various configuration stacks.

Guides

• SSO configuration
• AWS IAM configuration
• Docker-compose files
• Connection to a secure broker
• Configure seriliazation/deserialization plugins or code your own

Configuration File

Example of how to configure clusters in the application-local.yml configuration file:

kafka:
  clusters:
    -
      name: local
      bootstrapServers: localhost:29091
      schemaRegistry: http://localhost:8085
      schemaRegistryAuth:
        username: username
        password: password
#     schemaNameTemplate: "%s-value"
      metrics:
        port: 9997
        type: JMX
    -

• name: cluster name
• bootstrapServers: where to connect
• schemaRegistry: schemaRegistry's address
• schemaRegistryAuth.username: schemaRegistry's basic authentication username
• schemaRegistryAuth.password: schemaRegistry's basic authentication password
• schemaNameTemplate: how keys are saved to schemaRegistry
• metrics.port: open JMX port of a broker
• metrics.type: Type of metrics, either JMX or PROMETHEUS. Defaulted to JMX.
• readOnly: enable read only mode

Configure as many clusters as you need by adding their configs below separated with -.

Running a Docker Image

The official Docker image for UI for Apache Kafka is hosted here: hub.docker.com/r/provectuslabs/kafka-ui.

Launch Docker container in the background:

docker run -p 8080:8080 \
	-e KAFKA_CLUSTERS_0_NAME=local \
	-e KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS=kafka:9092 \
	-d provectuslabs/kafka-ui:latest

Then access the web UI at http://localhost:8080. Further configuration with environment variables - see environment variables

Docker Compose

If you prefer to use docker-compose please refer to the documentation.

Helm chart

Helm chart could be found under charts/kafka-ui directory

Quick-start instruction here

Building With Docker

Prerequisites

Check prerequisites.md

Building and Running

Check building.md

Building Without Docker

Prerequisites

Prerequisites will mostly remain the same with the exception of docker.

Running without Building

How to run quickly without building

Building and Running

How to build and run

Liveliness and readiness probes

Liveliness and readiness endpoint is at /actuator/health. Info endpoint (build info) is located at /actuator/info.

Environment Variables

Alternatively, each variable of the .yml file can be set with an environment variable. For example, if you want to use an environment variable to set the name parameter, you can write it like this: KAFKA_CLUSTERS_2_NAME

Name	Description
SERVER_SERVLET_CONTEXT_PATH	URI basePath
LOGGING_LEVEL_ROOT	Setting log level (trace, debug, info, warn, error). Default: info
LOGGING_LEVEL_COM_PROVECTUS	Setting log level (trace, debug, info, warn, error). Default: debug
SERVER_PORT	Port for the embedded server. Default: 8080
KAFKA_ADMIN-CLIENT-TIMEOUT	Kafka API timeout in ms. Default: 30000
KAFKA_CLUSTERS_0_NAME	Cluster name
KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS	Address where to connect
KAFKA_CLUSTERS_0_KSQLDBSERVER	KSQL DB server address
KAFKA_CLUSTERS_0_KSQLDBSERVERAUTH_USERNAME	KSQL DB server's basic authentication username
KAFKA_CLUSTERS_0_KSQLDBSERVERAUTH_PASSWORD	KSQL DB server's basic authentication password
KAFKA_CLUSTERS_0_KSQLDBSERVERSSL_KEYSTORELOCATION	Path to the JKS keystore to communicate to KSQL DB
KAFKA_CLUSTERS_0_KSQLDBSERVERSSL_KEYSTOREPASSWORD	Password of the JKS keystore for KSQL DB
KAFKA_CLUSTERS_0_KSQLDBSERVERSSL_TRUSTSTORELOCATION	Path to the JKS truststore to communicate to KSQL DB
KAFKA_CLUSTERS_0_KSQLDBSERVERSSL_TRUSTSTOREPASSWORD	Password of the JKS truststore for KSQL DB
KAFKA_CLUSTERS_0_PROPERTIES_SECURITY_PROTOCOL	Security protocol to connect to the brokers. For SSL connection use "SSL", for plaintext connection don't set this environment variable
KAFKA_CLUSTERS_0_SCHEMAREGISTRY	SchemaRegistry's address
KAFKA_CLUSTERS_0_SCHEMAREGISTRYAUTH_USERNAME	SchemaRegistry's basic authentication username
KAFKA_CLUSTERS_0_SCHEMAREGISTRYAUTH_PASSWORD	SchemaRegistry's basic authentication password
KAFKA_CLUSTERS_0_SCHEMAREGISTRYSSL_KEYSTORELOCATION	Path to the JKS keystore to communicate to SchemaRegistry
KAFKA_CLUSTERS_0_SCHEMAREGISTRYSSL_KEYSTOREPASSWORD	Password of the JKS keystore for SchemaRegistry
KAFKA_CLUSTERS_0_SCHEMAREGISTRYSSL_TRUSTSTORELOCATION	Path to the JKS truststore to communicate to SchemaRegistry
KAFKA_CLUSTERS_0_SCHEMAREGISTRYSSL_TRUSTSTOREPASSWORD	Password of the JKS truststore for SchemaRegistry
KAFKA_CLUSTERS_0_SCHEMANAMETEMPLATE	How keys are saved to schemaRegistry
KAFKA_CLUSTERS_0_METRICS_PORT	Open metrics port of a broker
KAFKA_CLUSTERS_0_METRICS_TYPE	Type of metrics retriever to use. Valid values are JMX (default) or PROMETHEUS. If Prometheus, then metrics are read from prometheus-jmx-exporter instead of jmx
KAFKA_CLUSTERS_0_READONLY	Enable read-only mode. Default: false
KAFKA_CLUSTERS_0_KAFKACONNECT_0_NAME	Given name for the Kafka Connect cluster
KAFKA_CLUSTERS_0_KAFKACONNECT_0_ADDRESS	Address of the Kafka Connect service endpoint
KAFKA_CLUSTERS_0_KAFKACONNECT_0_USERNAME	Kafka Connect cluster's basic authentication username
KAFKA_CLUSTERS_0_KAFKACONNECT_0_PASSWORD	Kafka Connect cluster's basic authentication password
KAFKA_CLUSTERS_0_KAFKACONNECT_0_KEYSTORELOCATION	Path to the JKS keystore to communicate to Kafka Connect
KAFKA_CLUSTERS_0_KAFKACONNECT_0_KEYSTOREPASSWORD	Password of the JKS keystore for Kafka Connect
KAFKA_CLUSTERS_0_KAFKACONNECT_0_TRUSTSTORELOCATION	Path to the JKS truststore to communicate to Kafka Connect
KAFKA_CLUSTERS_0_KAFKACONNECT_0_TRUSTSTOREPASSWORD	Password of the JKS truststore for Kafka Connect
KAFKA_CLUSTERS_0_METRICS_SSL	Enable SSL for Metrics? true or false. For advanced setup, see kafka-ui-jmx-secured.yml
KAFKA_CLUSTERS_0_METRICS_USERNAME	Username for Metrics authentication
KAFKA_CLUSTERS_0_METRICS_PASSWORD	Password for Metrics authentication
KAFKA_CLUSTERS_0_POLLING_THROTTLE_RATE	Max traffic rate (bytes/sec) that kafka-ui allowed to reach when polling messages from the cluster. Default: 0 (not limited)
TOPIC_RECREATE_DELAY_SECONDS	Time delay between topic deletion and topic creation attempts for topic recreate functionality. Default: 1
TOPIC_RECREATE_MAXRETRIES	Number of attempts of topic creation after topic deletion for topic recreate functionality. Default: 15