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Spring Boot Actuator AutoConfigure
/*
* Copyright 2012-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.boot.actuate.autoconfigure.metrics.export.prometheus;
import java.net.MalformedURLException;
import java.net.URL;
import java.time.Duration;
import java.util.Map;
import io.micrometer.core.instrument.Clock;
import io.micrometer.prometheus.PrometheusConfig;
import io.micrometer.prometheus.PrometheusMeterRegistry;
import io.prometheus.client.CollectorRegistry;
import io.prometheus.client.exemplars.DefaultExemplarSampler;
import io.prometheus.client.exemplars.ExemplarSampler;
import io.prometheus.client.exemplars.tracer.common.SpanContextSupplier;
import io.prometheus.client.exporter.BasicAuthHttpConnectionFactory;
import io.prometheus.client.exporter.PushGateway;
import org.springframework.beans.factory.ObjectProvider;
import org.springframework.boot.actuate.autoconfigure.endpoint.condition.ConditionalOnAvailableEndpoint;
import org.springframework.boot.actuate.autoconfigure.metrics.CompositeMeterRegistryAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.metrics.export.ConditionalOnEnabledMetricsExport;
import org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleMetricsExportAutoConfiguration;
import org.springframework.boot.actuate.metrics.export.prometheus.PrometheusPushGatewayManager;
import org.springframework.boot.actuate.metrics.export.prometheus.PrometheusPushGatewayManager.ShutdownOperation;
import org.springframework.boot.actuate.metrics.export.prometheus.PrometheusScrapeEndpoint;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.util.StringUtils;
/**
* {@link EnableAutoConfiguration Auto-configuration} for exporting metrics to Prometheus.
*
* @author Jon Schneider
* @author David J. M. Karlsen
* @author Jonatan Ivanov
* @since 2.0.0
*/
@AutoConfiguration(
before = { CompositeMeterRegistryAutoConfiguration.class, SimpleMetricsExportAutoConfiguration.class },
after = MetricsAutoConfiguration.class)
@ConditionalOnBean(Clock.class)
@ConditionalOnClass(PrometheusMeterRegistry.class)
@ConditionalOnEnabledMetricsExport("prometheus")
@EnableConfigurationProperties(PrometheusProperties.class)
public class PrometheusMetricsExportAutoConfiguration {
@Bean
@ConditionalOnMissingBean
public PrometheusConfig prometheusConfig(PrometheusProperties prometheusProperties) {
return new PrometheusPropertiesConfigAdapter(prometheusProperties);
}
@Bean
@ConditionalOnMissingBean
public PrometheusMeterRegistry prometheusMeterRegistry(PrometheusConfig prometheusConfig,
CollectorRegistry collectorRegistry, Clock clock, ObjectProvider exemplarSamplerProvider) {
return new PrometheusMeterRegistry(prometheusConfig, collectorRegistry, clock,
exemplarSamplerProvider.getIfAvailable());
}
@Bean
@ConditionalOnMissingBean
public CollectorRegistry collectorRegistry() {
return new CollectorRegistry(true);
}
@Bean
@ConditionalOnMissingBean(ExemplarSampler.class)
@ConditionalOnBean(SpanContextSupplier.class)
public DefaultExemplarSampler exemplarSampler(SpanContextSupplier spanContextSupplier) {
return new DefaultExemplarSampler(spanContextSupplier);
}
@Configuration(proxyBeanMethods = false)
@ConditionalOnAvailableEndpoint(endpoint = PrometheusScrapeEndpoint.class)
public static class PrometheusScrapeEndpointConfiguration {
@Bean
@ConditionalOnMissingBean
public PrometheusScrapeEndpoint prometheusEndpoint(CollectorRegistry collectorRegistry) {
return new PrometheusScrapeEndpoint(collectorRegistry);
}
}
/**
* Configuration for Prometheus
* Pushgateway.
*/
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(PushGateway.class)
@ConditionalOnProperty(prefix = "management.prometheus.metrics.export.pushgateway", name = "enabled")
public static class PrometheusPushGatewayConfiguration {
/**
* The fallback job name. We use 'spring' since there's a history of Prometheus
* spring integration defaulting to that name from when Prometheus integration
* didn't exist in Spring itself.
*/
private static final String FALLBACK_JOB = "spring";
@Bean
@ConditionalOnMissingBean
public PrometheusPushGatewayManager prometheusPushGatewayManager(CollectorRegistry collectorRegistry,
PrometheusProperties prometheusProperties, Environment environment) throws MalformedURLException {
PrometheusProperties.Pushgateway properties = prometheusProperties.getPushgateway();
Duration pushRate = properties.getPushRate();
String job = getJob(properties, environment);
Map groupingKey = properties.getGroupingKey();
ShutdownOperation shutdownOperation = properties.getShutdownOperation();
PushGateway pushGateway = initializePushGateway(properties.getBaseUrl());
if (StringUtils.hasText(properties.getUsername())) {
pushGateway.setConnectionFactory(
new BasicAuthHttpConnectionFactory(properties.getUsername(), properties.getPassword()));
}
return new PrometheusPushGatewayManager(pushGateway, collectorRegistry, pushRate, job, groupingKey,
shutdownOperation);
}
private PushGateway initializePushGateway(String url) throws MalformedURLException {
return new PushGateway(new URL(url));
}
private String getJob(PrometheusProperties.Pushgateway properties, Environment environment) {
String job = properties.getJob();
job = (job != null) ? job : environment.getProperty("spring.application.name");
return (job != null) ? job : FALLBACK_JOB;
}
}
}