Prometheus gauge example java. Do not use a counter to expose a value that can decrease.

Prometheus gauge example java. Do not use a counter to expose a value that can decrease.

Prometheus gauge example java. For example, do not use a counter for the number of currently running processes; instead use a gauge. Client library usage documentation for counters: Go Java Python Ruby . Net Rust Gauge A gauge is a metric that represents a single numerical value that can arbitrarily go up and down. Typical examples for gauges would be the size of a collection or map or the number of threads in a running state. Feb 20, 2025 · Prior experience with Java and Spring Boot, along with a recent JDK installed Maven or Gradle for dependency management Familiarity with Docker and Docker Compose Basic understanding of how Prometheus works Step 1 — Setting up the demo project To demonstrate Prometheus instrumentation in Java applications, let's set up a simple "Hello World" Spring Boot application along with the Prometheus This tutorial shows the quickest way to get started with the Prometheus Java metrics library. Instrumentation should be an integral part of your code. * Gauge metric, to report instantaneous values. prometheus-metrics-instrumentation-jvm provides out-of-the-box JVM metrics. How to instrument The short answer is to instrument everything. * class YourClass { This example demonstrates how to use the OpenTelemetry SDK to instrument a simple application using Prometheus as the metric exporter and expose the metrics via HTTP. prometheus-metrics-exporter Jul 29, 2019 · I wrote a Spring Boot app and I'd like to expose custom metrics to Prometheus with Micrometer. Called when the Prometheus server scrapes metrics. Oct 29, 2024 · Learn how to effectively use the Prometheus Java client to monitor applications by instrumenting custom and JVM metrics. Do not use a counter to expose a value that can decrease. I have a springboot Kotlin web service that uses Actuator (spring-boot-starter-actuator) and micrometer (micrometer-registry-prometheus) to expose metrics to a prometheus scraper. Dec 27, 2024 · In summary, this Java program demonstrates how to expose Prometheus-compatible metrics, including counting HTTP requests, tracking dynamic values like temperature, and measuring the duration of requests using counters, gauges, and histograms. Here’s an example of using it to measure the size of a queue. Dependencies Dependency management Example Application Result Prometheus Configuration Dependencies We use the following dependencies: prometheus-metrics-core is the actual metrics library. Here's a code snippet where I'm incrementing a counter (which works) and attempts to set a couple of g A gauge is a handle to get the current value. Instantiate the Demonstration for instrumentation of a Java app with Prometheus - ruanbekker/prometheus-java-metrics-example. * <p> * An example Gauge: * <pre> * {@code. prometheus:simpleclient and can be downloaded from Maven central. Every library, subsystem and service should have at least a few metrics to give you a rough idea of how it is performing. Prometheus project documentation for InstrumentationThis page provides an opinionated set of guidelines for instrumenting your code. Feb 5, 2021 · The Java client library for creating Prometheus gauges is io. Set the gauge to value, and create a custom exemplar with the given labels. * <p> * Examples of Gauges include: * <ul> * <li>Inprogress requests</li> * <li>Number of items in a queue</li> * <li>Free memory</li> * <li>Total memory</li> * <li>Temperature</li> * </ul> * Gauges can go both up and down. oppcb wzuukn qztki mvmrdak rfpmk sejvt iheyb scss skjntn knff