kotlin

Kotlin Metric Registrar Example

Sample Kotlin App

Endpoints in the sample app

• / - frontend to trigger endpoints
• /simple - Returns OK.
• /high_latency - Delays 2 seconds before responding.
• /custom_metric - Increments the custom counter.
• /actuator/prometheus - Displays Prometheus metrics

Running the sample application

1. cd metric-registrar-examples/kotlin
2. ./gradlew bootRun

Running tests for sample app

1. cd metric-registrar-examples/kotlin
2. ./gradlew test

Register app with Metric Registrar

Install Plugins

These plugins will allow you to register & test apps with the Metric Registrar

cf install-plugin -r CF-Community "metric-registrar"
cf install-plugin -r CF-Community "log-cache"

Register

To register a metric endpoint with the Metric Registrar, run:

cf register-metrics-endpoint <APP_NAME> /actuator/prometheus

Test

To look at all the counters emitted by an app, run:

cf tail -f --envelope-type=counter <APP_NAME>

To look at all the guages emitted by an app, run:

cf tail -f --envelope-type=guage <APP_NAME>