Springboot outputs metrics to prometheus

  prometheus, springboot

Build push gateway

version: '2'
services:
  prometheus:
    build: .
    ports:
      - 9090:9090
    volumes:
      - /tmp/prometheus-data:/prometheus-data
    links:
      - pushgateway
  pushgateway:
    image: prom/pushgateway
    ports:
      - 9999:9091

Configure data taken from pushgateway

# my global config
global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).
  # Attach these labels to any time series or alerts when communicating with
  # external systems (federation, remote storage, Alertmanager).
  external_labels:
      monitor: 'codelab-monitor'
# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first.rules"
  # - "second.rules"
# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'
    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.
    static_configs:
      - targets: ['localhost:9090']
  - job_name: 'push-metrics'
    static_configs:
      - targets: ['192.168.99.100:9999']

maven

        <!-- The client -->
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient</artifactId>
            <version>0.0.21</version>
        </dependency>
        <!-- Hotspot JVM metrics -->
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_hotspot</artifactId>
            <version>0.0.21</version>
        </dependency>
        <!-- Exposition servlet -->
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_servlet</artifactId>
            <version>0.0.21</version>
        </dependency>
        <!-- Pushgateway exposition -->
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_pushgateway</artifactId>
            <version>0.0.21</version>
        </dependency>
        <dependency>
            <groupId>io.prometheus</groupId>
            <artifactId>simpleclient_dropwizard</artifactId>
            <version>0.0.21</version>
        </dependency>

java config

@Component
public class PrometheusConfig {

    @Autowired
    MetricRegistry dropwizardRegistry;

    @Value("${spring.application.name}")
    String applicationName;

    @Value("${prometheus.pushgateway.host}")
    String pushHost;

    @Value("${prometheus.pushgateway.intervalInMillis:10000}")
    long intervalInMillis;

    private final CollectorRegistry prometheusRegistry = new CollectorRegistry();

    @PostConstruct
    public void initialize() {
        DropwizardExports prometheus = new DropwizardExports(dropwizardRegistry);
        prometheus.register(prometheusRegistry);

        PushGateway prometheusPush = new PushGateway(pushHost);

        Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(() -> {
            try {
                prometheus.collect();
                prometheusPush.push(prometheusRegistry, applicationName);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }, 5000, intervalInMillis, TimeUnit.MILLISECONDS);
    }
}