116 lines
3.5 KiB
Plaintext
116 lines
3.5 KiB
Plaintext
= Kafka Health Check
|
|
|
|
:uri-build-status: https://travis-ci.org/deviceinsight/kafka-health-check
|
|
:img-build-status: https://api.travis-ci.org/deviceinsight/kafka-health-check.svg?branch=master
|
|
|
|
image:{img-build-status}[Build Status Badge,link={uri-build-status}]
|
|
|
|
This library provides a kafka health check for spring boot actuator.
|
|
|
|
== Usage
|
|
|
|
Add the following dependency to your `pom.xml`
|
|
|
|
[source,xml]
|
|
....
|
|
<dependency>
|
|
<groupId>com.deviceinsight.kafka</groupId>
|
|
<artifactId>kafka-health-check</artifactId>
|
|
<version>1.2.0</version>
|
|
</dependency>
|
|
....
|
|
|
|
In the same maven module you can configure the topic, poll timeouts, subscription timeouts and the receive timeouts
|
|
in the `application.yml`
|
|
|
|
An example for an `application.yaml` is:
|
|
|
|
[source,yaml]
|
|
....
|
|
kafka:
|
|
health:
|
|
topic: health-checks
|
|
sendReceiveTimeout: 2.5s
|
|
pollTimeout: 200ms
|
|
subscriptionTimeout: 5s
|
|
....
|
|
|
|
The values shown are the defaults.
|
|
|
|
IMPORTANT: Make sure the configured health check topic exists!
|
|
|
|
[source,java]
|
|
....
|
|
@Bean
|
|
@ConfigurationProperties("kafka.health")
|
|
public KafkaHealthProperties kafkaHealthProperties() {
|
|
return new KafkaHealthProperties();
|
|
}
|
|
....
|
|
|
|
[source,java]
|
|
....
|
|
@Bean
|
|
public KafkaConsumingHealthIndicator kafkaConsumingHealthIndicator(KafkaHealthProperties kafkaProperties,
|
|
KafkaProperties processingProperties) {
|
|
return new KafkaConsumingHealthIndicator(kafkaHealthProperties, processingProperties.buildConsumerProperties(),
|
|
processingProperties.buildProducerProperties());
|
|
}
|
|
....
|
|
|
|
Now if you call the actuator endpoint `actuator/health` you should see the following output:
|
|
|
|
[source,json]
|
|
....
|
|
{
|
|
"status" : "UP",
|
|
"details" : {
|
|
"kafkaConsuming" : {
|
|
"status" : "UP"
|
|
}
|
|
}
|
|
}
|
|
....
|
|
|
|
== Configuration
|
|
|
|
|===
|
|
|Property |Default |Description
|
|
|
|
|kafka.health.topic |`health-checks` | Topic to subscribe to
|
|
|kafka.health.sendReceiveTimeout |2.5s | The maximum time, given as https://docs.spring.io/spring-boot/docs/2.1.9.RELEASE/reference/html/boot-features-external-config.html#boot-features-external-config-conversion-duration[Duration], to wait for sending and receiving the message.
|
|
|kafka.health.pollTimeout |200ms | The time, given as https://docs.spring.io/spring-boot/docs/2.1.9.RELEASE/reference/html/boot-features-external-config.html#boot-features-external-config-conversion-duration[Duration], spent fetching the data from the topic
|
|
|kafka.health.subscriptionTimeout |5s | The maximum time, given as https://docs.spring.io/spring-boot/docs/2.1.9.RELEASE/reference/html/boot-features-external-config.html#boot-features-external-config-conversion-duration[Duration], to wait for subscribing to topic
|
|
|kafka.health.cache.maximumSize |200 | Specifies the maximum number of entries the cache may contain.
|
|
|
|
|===
|
|
|
|
== Releasing
|
|
|
|
Creating a new release involves the following steps:
|
|
|
|
. `./mvnw gitflow:release-start gitflow:release-finish`
|
|
. `git push origin master`
|
|
. `git push --tags`
|
|
. `git push origin develop`
|
|
|
|
In order to deploy the release to Maven Central, you need to create an account at https://issues.sonatype.org and
|
|
configure your account in `~/.m2/settings.xml`:
|
|
|
|
[source,xml]
|
|
....
|
|
<settings>
|
|
<servers>
|
|
<server>
|
|
<id>ossrh</id>
|
|
<username>your-jira-id</username>
|
|
<password>your-jira-pwd</password>
|
|
</server>
|
|
</servers>
|
|
</settings>
|
|
....
|
|
|
|
The account also needs access to the project on Maven Central. This can be requested by another project member.
|
|
|
|
Then check out the release you want to deploy (`git checkout x.y.z`) and run `./mvnw deploy -Prelease`.
|