Spring Boot

Monitor Spring Boot applications via the Actuator Prometheus endpoint — HTTP request rates, JVM memory, GC pauses, and connection pool usage.

Key Metrics

Metric	Description
http_server_requests_seconds_count	HTTP request count per endpoint
http_server_requests_seconds_sum	Total HTTP request duration
jvm_memory_used_bytes	JVM heap and non-heap usage
jvm_gc_pause_seconds_sum	GC pause duration
hikaricp_connections_active	Active HikariCP connections
system_cpu_usage	System CPU utilisation

Prerequisites

• Spring Boot 2.x / 3.x
• spring-boot-starter-actuator + micrometer-registry-prometheus dependencies

Configuration

pom.xml dependencies

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-registry-prometheus</artifactId>
</dependency>

application.properties

management.endpoints.web.exposure.include=prometheus,health
management.endpoint.prometheus.enabled=true

Metrics are available at http://localhost:8080/actuator/prometheus.

Option A — Prometheus scrape

scrape_configs:
  - job_name: spring_boot
    metrics_path: /actuator/prometheus
    static_configs:
      - targets: ['localhost:8080']

remote_write:
  - url: https://<region>.xscalerlabs.com/api/v1/push
    headers:
      X-Scope-OrgID: <tenant-id>
    basic_auth:
      password: <api-token>

Option B — Grafana Alloy

prometheus.scrape "spring_boot" {
  targets      = [{"__address__" = "localhost:8080"}]
  metrics_path = "/actuator/prometheus"
  forward_to   = [prometheus.remote_write.xscaler.receiver]
}

prometheus.remote_write "xscaler" {
  endpoint {
    url = "https://<region>.xscalerlabs.com/api/v1/push"
    headers = { "X-Scope-OrgID" = "<tenant-id>" }
    basic_auth { password = "<api-token>" }
  }
}

Option C — OpenTelemetry Collector

receivers:
  prometheus:
    config:
      scrape_configs:
        - job_name: spring_boot
          metrics_path: /actuator/prometheus
          static_configs:
            - targets: ['localhost:8080']

exporters:
  prometheusremotewrite:
    endpoint: https://<region>.xscalerlabs.com/api/v1/push
    headers:
      Authorization: Bearer <api-token>
      X-Scope-OrgID: <tenant-id>

service:
  pipelines:
    metrics:
      receivers: [prometheus]
      exporters: [prometheusremotewrite]

Logs

Collect Spring Boot application log — configure logging.file.name and tail the output file. Add the following to your Alloy config, adjusting __path__ to match your application's log file location:

local.file_match "spring_boot_logs" {
  path_targets = [{
    __address__ = "localhost",
    __path__    = "/var/log/spring_boot/app.log",
    instance    = constants.hostname,
    job         = "integrations/spring_boot",
  }]
}

loki.source.file "spring_boot_logs" {
  targets    = local.file_match.spring_boot_logs.targets
  forward_to = [loki.write.xscaler.receiver]
}

loki.write "xscaler" {
  endpoint {
    url = "https://euw1-01.l.xscalerlabs.com/api/v1/logs/push"

    http_client_config {
      authorization {
        type        = "Bearer"
        credentials = env("XSCALER_TOKEN")
      }
    }

    headers = { "X-Scope-OrgID" = env("XSCALER_TENANT_ID") }
  }
}