Merge pull request #35082 from eddumelendez

* pr/35082-2:
  Polish "Add service connection from OpenTelemetry Collector"
  Add service connection from OpenTelemetry Collector

Closes gh-35082

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/otlp/OtlpMetricsConnectionDetails.java

@@ -0,0 +1,35 @@
+/*
+ * 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.otlp;
+
+import org.springframework.boot.autoconfigure.service.connection.ConnectionDetails;
+
+/**
+ * Details required to establish a connection to a OpenTelemetry Collector service.
+ *
+ * @author Eddú Meléndez
+ * @since 3.2.0
+ */
+public interface OtlpMetricsConnectionDetails extends ConnectionDetails {
+
+	/**
+	 * Address to where metrics will be published.
+	 * @return the address to where metrics will be published
+	 */
+	String getUrl();
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/otlp/OtlpMetricsExportAutoConfiguration.java

@@ -50,11 +50,24 @@ import org.springframework.core.env.Environment;
 @EnableConfigurationProperties({ OtlpProperties.class, OpenTelemetryProperties.class })
 public class OtlpMetricsExportAutoConfiguration {
 
+	private final OtlpProperties properties;
+
+	OtlpMetricsExportAutoConfiguration(OtlpProperties properties) {
+		this.properties = properties;
+	}
+
+	@Bean
+	@ConditionalOnMissingBean(OtlpMetricsConnectionDetails.class)
+	OtlpMetricsConnectionDetails otlpMetricsConnectionDetails() {
+		return new PropertiesOtlpMetricsConnectionDetails(this.properties);
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
-	OtlpConfig otlpConfig(OtlpProperties properties, OpenTelemetryProperties openTelemetryProperties,
-			Environment environment) {
-		return new OtlpPropertiesConfigAdapter(properties, openTelemetryProperties, environment);
+	OtlpConfig otlpConfig(OpenTelemetryProperties openTelemetryProperties,
+			OtlpMetricsConnectionDetails connectionDetails, Environment environment) {
+		return new OtlpPropertiesConfigAdapter(this.properties, openTelemetryProperties, connectionDetails,
+				environment);
 	}
 
 	@Bean
@@ -63,4 +76,22 @@ public class OtlpMetricsExportAutoConfiguration {
 		return new OtlpMeterRegistry(otlpConfig, clock);
 	}
 
+	/**
+	 * Adapts {@link OtlpProperties} to {@link OtlpMetricsConnectionDetails}.
+	 */
+	static class PropertiesOtlpMetricsConnectionDetails implements OtlpMetricsConnectionDetails {
+
+		private final OtlpProperties properties;
+
+		PropertiesOtlpMetricsConnectionDetails(OtlpProperties properties) {
+			this.properties = properties;
+		}
+
+		@Override
+		public String getUrl() {
+			return this.properties.getUrl();
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/export/otlp/OtlpPropertiesConfigAdapter.java

@@ -45,11 +45,14 @@ class OtlpPropertiesConfigAdapter extends StepRegistryPropertiesConfigAdapter<Ot
 
 	private final OpenTelemetryProperties openTelemetryProperties;
 
+	private final OtlpMetricsConnectionDetails connectionDetails;
+
 	private final Environment environment;
 
 	OtlpPropertiesConfigAdapter(OtlpProperties properties, OpenTelemetryProperties openTelemetryProperties,
-			Environment environment) {
+			OtlpMetricsConnectionDetails connectionDetails, Environment environment) {
 		super(properties);
+		this.connectionDetails = connectionDetails;
 		this.openTelemetryProperties = openTelemetryProperties;
 		this.environment = environment;
 	}
@@ -61,7 +64,7 @@ class OtlpPropertiesConfigAdapter extends StepRegistryPropertiesConfigAdapter<Ot
 
 	@Override
 	public String url() {
-		return get(OtlpProperties::getUrl, OtlpConfig.super::url);
+		return get((properties) -> this.connectionDetails.getUrl(), OtlpConfig.super::url);
 	}
 
 	@Override

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/otlp/OtlpAutoConfiguration.java

@@ -16,23 +16,17 @@
 
 package org.springframework.boot.actuate.autoconfigure.tracing.otlp;
 
-import java.util.Map.Entry;
-
 import io.micrometer.tracing.otel.bridge.OtelTracer;
 import io.opentelemetry.api.OpenTelemetry;
 import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporter;
-import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporterBuilder;
 import io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter;
 import io.opentelemetry.sdk.trace.SdkTracerProvider;
 
-import org.springframework.boot.actuate.autoconfigure.tracing.ConditionalOnEnabledTracing;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 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.Import;
 
 /**
  * {@link EnableAutoConfiguration Auto-configuration} for OTLP. Brave does not support
@@ -47,27 +41,13 @@ import org.springframework.context.annotation.Bean;
  *
  * @author Jonatan Ivanov
  * @author Moritz Halbritter
+ * @author Eddú Meléndez
  * @since 3.1.0
  */
 @AutoConfiguration
 @ConditionalOnClass({ OtelTracer.class, SdkTracerProvider.class, OpenTelemetry.class, OtlpHttpSpanExporter.class })
 @EnableConfigurationProperties(OtlpProperties.class)
+@Import({ OtlpTracingConfigurations.ConnectionDetails.class, OtlpTracingConfigurations.Exporters.class })
 public class OtlpAutoConfiguration {
 
-	@Bean
-	@ConditionalOnMissingBean(value = OtlpHttpSpanExporter.class,
-			type = "io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter")
-	@ConditionalOnProperty(prefix = "management.otlp.tracing", name = "endpoint")
-	@ConditionalOnEnabledTracing
-	OtlpHttpSpanExporter otlpHttpSpanExporter(OtlpProperties properties) {
-		OtlpHttpSpanExporterBuilder builder = OtlpHttpSpanExporter.builder()
-			.setEndpoint(properties.getEndpoint())
-			.setTimeout(properties.getTimeout())
-			.setCompression(properties.getCompression().name().toLowerCase());
-		for (Entry<String, String> header : properties.getHeaders().entrySet()) {
-			builder.addHeader(header.getKey(), header.getValue());
-		}
-		return builder.build();
-	}
-
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/otlp/OtlpTracingConfigurations.java

@@ -0,0 +1,93 @@
+/*
+ * 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.tracing.otlp;
+
+import java.util.Map.Entry;
+
+import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporter;
+import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporterBuilder;
+
+import org.springframework.boot.actuate.autoconfigure.tracing.ConditionalOnEnabledTracing;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * Configurations imported by {@link OtlpAutoConfiguration}.
+ *
+ * @author Moritz Halbritter
+ */
+final class OtlpTracingConfigurations {
+
+	private OtlpTracingConfigurations() {
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	static class ConnectionDetails {
+
+		@Bean
+		@ConditionalOnMissingBean(OtlpTracingConnectionDetails.class)
+		@ConditionalOnProperty(prefix = "management.otlp.tracing", name = "endpoint")
+		OtlpTracingConnectionDetails otlpTracingConnectionDetails(OtlpProperties properties) {
+			return new PropertiesOtlpTracingConnectionDetails(properties);
+		}
+
+		/**
+		 * Adapts {@link OtlpProperties} to {@link OtlpTracingConnectionDetails}.
+		 */
+		static class PropertiesOtlpTracingConnectionDetails implements OtlpTracingConnectionDetails {
+
+			private final OtlpProperties properties;
+
+			PropertiesOtlpTracingConnectionDetails(OtlpProperties properties) {
+				this.properties = properties;
+			}
+
+			@Override
+			public String getEndpoint() {
+				return this.properties.getEndpoint();
+			}
+
+		}
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	static class Exporters {
+
+		@Bean
+		@ConditionalOnMissingBean(value = OtlpHttpSpanExporter.class,
+				type = "io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter")
+		@ConditionalOnBean(OtlpTracingConnectionDetails.class)
+		@ConditionalOnEnabledTracing
+		OtlpHttpSpanExporter otlpHttpSpanExporter(OtlpProperties properties,
+				OtlpTracingConnectionDetails connectionDetails) {
+			OtlpHttpSpanExporterBuilder builder = OtlpHttpSpanExporter.builder()
+				.setEndpoint(connectionDetails.getEndpoint())
+				.setTimeout(properties.getTimeout())
+				.setCompression(properties.getCompression().name().toLowerCase());
+			for (Entry<String, String> header : properties.getHeaders().entrySet()) {
+				builder.addHeader(header.getKey(), header.getValue());
+			}
+			return builder.build();
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/tracing/otlp/OtlpTracingConnectionDetails.java

@@ -0,0 +1,35 @@
+/*
+ * 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.tracing.otlp;
+
+import org.springframework.boot.autoconfigure.service.connection.ConnectionDetails;
+
+/**
+ * Details required to establish a connection to a OpenTelemetry service.
+ *
+ * @author Eddú Meléndez
+ * @since 3.2.0
+ */
+public interface OtlpTracingConnectionDetails extends ConnectionDetails {
+
+	/**
+	 * Address to where metrics will be published.
+	 * @return the address to where metrics will be published
+	 */
+	String getEndpoint();
+
+}

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/export/otlp/OtlpMetricsExportAutoConfigurationTests.java

@@ -21,6 +21,7 @@ import io.micrometer.registry.otlp.OtlpConfig;
 import io.micrometer.registry.otlp.OtlpMeterRegistry;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.boot.actuate.autoconfigure.metrics.export.otlp.OtlpMetricsExportAutoConfiguration.PropertiesOtlpMetricsConnectionDetails;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.context.annotation.Bean;
@@ -83,6 +84,23 @@ class OtlpMetricsExportAutoConfigurationTests {
 				.hasBean("customRegistry"));
 	}
 
+	@Test
+	void definesPropertiesBasedConnectionDetailsByDefault() {
+		this.contextRunner.withUserConfiguration(BaseConfiguration.class)
+			.run((context) -> assertThat(context).hasSingleBean(PropertiesOtlpMetricsConnectionDetails.class));
+	}
+
+	@Test
+	void testConnectionFactoryWithOverridesWhenUsingCustomConnectionDetails() {
+		this.contextRunner.withUserConfiguration(BaseConfiguration.class, ConnectionDetailsConfiguration.class)
+			.run((context) -> {
+				assertThat(context).hasSingleBean(OtlpMetricsConnectionDetails.class)
+					.doesNotHaveBean(PropertiesOtlpMetricsConnectionDetails.class);
+				OtlpConfig config = context.getBean(OtlpConfig.class);
+				assertThat(config.url()).isEqualTo("http://localhost:12345/v1/metrics");
+			});
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	static class BaseConfiguration {
 
@@ -115,4 +133,14 @@ class OtlpMetricsExportAutoConfigurationTests {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	static class ConnectionDetailsConfiguration {
+
+		@Bean
+		OtlpMetricsConnectionDetails otlpConnectionDetails() {
+			return () -> "http://localhost:12345/v1/metrics";
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/metrics/export/otlp/OtlpPropertiesConfigAdapterTests.java

@@ -24,6 +24,7 @@ import io.micrometer.registry.otlp.AggregationTemporality;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.boot.actuate.autoconfigure.metrics.export.otlp.OtlpMetricsExportAutoConfiguration.PropertiesOtlpMetricsConnectionDetails;
 import org.springframework.boot.actuate.autoconfigure.opentelemetry.OpenTelemetryProperties;
 import org.springframework.mock.env.MockEnvironment;
 
@@ -44,11 +45,14 @@ class OtlpPropertiesConfigAdapterTests {
 
 	private MockEnvironment environment;
 
+	private OtlpMetricsConnectionDetails connectionDetails;
+
 	@BeforeEach
 	void setUp() {
 		this.properties = new OtlpProperties();
 		this.openTelemetryProperties = new OpenTelemetryProperties();
 		this.environment = new MockEnvironment();
+		this.connectionDetails = new PropertiesOtlpMetricsConnectionDetails(this.properties);
 	}
 
 	@Test
@@ -136,7 +140,8 @@ class OtlpPropertiesConfigAdapterTests {
 	}
 
 	private OtlpPropertiesConfigAdapter createAdapter() {
-		return new OtlpPropertiesConfigAdapter(this.properties, this.openTelemetryProperties, this.environment);
+		return new OtlpPropertiesConfigAdapter(this.properties, this.openTelemetryProperties, this.connectionDetails,
+				this.environment);
 	}
 
 }

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/tracing/otlp/OtlpAutoConfigurationTests.java

@@ -19,8 +19,10 @@ package org.springframework.boot.actuate.autoconfigure.tracing.otlp;
 import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporter;
 import io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter;
 import io.opentelemetry.sdk.trace.export.SpanExporter;
+import okhttp3.HttpUrl;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.boot.actuate.autoconfigure.tracing.otlp.OtlpTracingConfigurations.ConnectionDetails.PropertiesOtlpTracingConnectionDetails;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
 import org.springframework.boot.test.context.FilteredClassLoader;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
@@ -34,6 +36,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Jonatan Ivanov
  * @author Moritz Halbritter
+ * @author Eddú Meléndez
  */
 class OtlpAutoConfigurationTests {
 
@@ -106,6 +109,23 @@ class OtlpAutoConfigurationTests {
 			.run((context) -> assertThat(context).doesNotHaveBean(OtlpHttpSpanExporter.class));
 	}
 
+	@Test
+	void definesPropertiesBasedConnectionDetailsByDefault() {
+		this.contextRunner.withPropertyValues("management.otlp.tracing.endpoint=http://localhost:4318/v1/traces")
+			.run((context) -> assertThat(context).hasSingleBean(PropertiesOtlpTracingConnectionDetails.class));
+	}
+
+	@Test
+	void testConnectionFactoryWithOverridesWhenUsingCustomConnectionDetails() {
+		this.contextRunner.withUserConfiguration(ConnectionDetailsConfiguration.class).run((context) -> {
+			assertThat(context).hasSingleBean(OtlpTracingConnectionDetails.class)
+				.doesNotHaveBean(PropertiesOtlpTracingConnectionDetails.class);
+			OtlpHttpSpanExporter otlpHttpSpanExporter = context.getBean(OtlpHttpSpanExporter.class);
+			assertThat(otlpHttpSpanExporter).extracting("delegate.httpSender.url")
+				.isEqualTo(HttpUrl.get("http://localhost:12345/v1/traces"));
+		});
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	private static class CustomHttpExporterConfiguration {
 
@@ -126,4 +146,14 @@ class OtlpAutoConfigurationTests {
 
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	static class ConnectionDetailsConfiguration {
+
+		@Bean
+		OtlpTracingConnectionDetails otlpTracingConnectionDetails() {
+			return () -> "http://localhost:12345/v1/traces";
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/service/connection/otlp/OpenTelemetryMetricsDockerComposeConnectionDetailsFactory.java

@@ -0,0 +1,65 @@
+/*
+ * 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.docker.compose.service.connection.otlp;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.otlp.OtlpMetricsConnectionDetails;
+import org.springframework.boot.docker.compose.core.RunningService;
+import org.springframework.boot.docker.compose.service.connection.DockerComposeConnectionDetailsFactory;
+import org.springframework.boot.docker.compose.service.connection.DockerComposeConnectionSource;
+
+/**
+ * {@link DockerComposeConnectionDetailsFactory} to create
+ * {@link OtlpMetricsConnectionDetails} for a {@code OTLP} service.
+ *
+ * @author Eddú Meléndez
+ */
+class OpenTelemetryMetricsDockerComposeConnectionDetailsFactory
+		extends DockerComposeConnectionDetailsFactory<OtlpMetricsConnectionDetails> {
+
+	private static final int OTLP_PORT = 4318;
+
+	OpenTelemetryMetricsDockerComposeConnectionDetailsFactory() {
+		super("otel/opentelemetry-collector-contrib",
+				"org.springframework.boot.actuate.autoconfigure.metrics.export.otlp.OtlpMetricsExportAutoConfiguration");
+	}
+
+	@Override
+	protected OtlpMetricsConnectionDetails getDockerComposeConnectionDetails(DockerComposeConnectionSource source) {
+		return new OpenTelemetryContainerMetricsConnectionDetails(source.getRunningService());
+	}
+
+	private static final class OpenTelemetryContainerMetricsConnectionDetails extends DockerComposeConnectionDetails
+			implements OtlpMetricsConnectionDetails {
+
+		private final String host;
+
+		private final int port;
+
+		private OpenTelemetryContainerMetricsConnectionDetails(RunningService source) {
+			super(source);
+			this.host = source.host();
+			this.port = source.ports().get(OTLP_PORT);
+		}
+
+		@Override
+		public String getUrl() {
+			return "http://%s:%d/v1/metrics".formatted(this.host, this.port);
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/service/connection/otlp/OpenTelemetryTracingDockerComposeConnectionDetailsFactory.java

@@ -0,0 +1,65 @@
+/*
+ * 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.docker.compose.service.connection.otlp;
+
+import org.springframework.boot.actuate.autoconfigure.tracing.otlp.OtlpTracingConnectionDetails;
+import org.springframework.boot.docker.compose.core.RunningService;
+import org.springframework.boot.docker.compose.service.connection.DockerComposeConnectionDetailsFactory;
+import org.springframework.boot.docker.compose.service.connection.DockerComposeConnectionSource;
+
+/**
+ * {@link DockerComposeConnectionDetailsFactory} to create
+ * {@link OtlpTracingConnectionDetails} for a {@code OTLP} service.
+ *
+ * @author Eddú Meléndez
+ */
+class OpenTelemetryTracingDockerComposeConnectionDetailsFactory
+		extends DockerComposeConnectionDetailsFactory<OtlpTracingConnectionDetails> {
+
+	private static final int OTLP_PORT = 4318;
+
+	OpenTelemetryTracingDockerComposeConnectionDetailsFactory() {
+		super("otel/opentelemetry-collector-contrib",
+				"org.springframework.boot.actuate.autoconfigure.tracing.otlp.OtlpAutoConfiguration");
+	}
+
+	@Override
+	protected OtlpTracingConnectionDetails getDockerComposeConnectionDetails(DockerComposeConnectionSource source) {
+		return new OpenTelemetryTracingDockerComposeConnectionDetails(source.getRunningService());
+	}
+
+	private static final class OpenTelemetryTracingDockerComposeConnectionDetails extends DockerComposeConnectionDetails
+			implements OtlpTracingConnectionDetails {
+
+		private final String host;
+
+		private final int port;
+
+		private OpenTelemetryTracingDockerComposeConnectionDetails(RunningService source) {
+			super(source);
+			this.host = source.host();
+			this.port = source.ports().get(OTLP_PORT);
+		}
+
+		@Override
+		public String getEndpoint() {
+			return "http://%s:%d/v1/traces".formatted(this.host, this.port);
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/service/connection/otlp/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * 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.
+ */
+
+/**
+ * Support for docker compose OpenTelemetry service connections.
+ */
+package org.springframework.boot.docker.compose.service.connection.otlp;

spring-boot-project/spring-boot-docker-compose/src/main/resources/META-INF/spring.factories

@@ -17,6 +17,8 @@ org.springframework.boot.docker.compose.service.connection.mysql.MySqlJdbcDocker
 org.springframework.boot.docker.compose.service.connection.mysql.MySqlR2dbcDockerComposeConnectionDetailsFactory,\
 org.springframework.boot.docker.compose.service.connection.oracle.OracleJdbcDockerComposeConnectionDetailsFactory,\
 org.springframework.boot.docker.compose.service.connection.oracle.OracleR2dbcDockerComposeConnectionDetailsFactory,\
+org.springframework.boot.docker.compose.service.connection.otlp.OpenTelemetryMetricsDockerComposeConnectionDetailsFactory,\
+org.springframework.boot.docker.compose.service.connection.otlp.OpenTelemetryTracingDockerComposeConnectionDetailsFactory,\
 org.springframework.boot.docker.compose.service.connection.postgres.PostgresJdbcDockerComposeConnectionDetailsFactory,\
 org.springframework.boot.docker.compose.service.connection.postgres.PostgresR2dbcDockerComposeConnectionDetailsFactory,\
 org.springframework.boot.docker.compose.service.connection.pulsar.PulsarDockerComposeConnectionDetailsFactory,\

spring-boot-project/spring-boot-docker-compose/src/test/java/org/springframework/boot/docker/compose/service/connection/otlp/OpenTelemetryMetricsDockerComposeConnectionDetailsFactoryIntegrationTests.java

@@ -0,0 +1,46 @@
+/*
+ * 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.docker.compose.service.connection.otlp;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.otlp.OtlpMetricsConnectionDetails;
+import org.springframework.boot.docker.compose.service.connection.test.AbstractDockerComposeIntegrationTests;
+import org.springframework.boot.testsupport.testcontainers.DockerImageNames;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for
+ * {@link OpenTelemetryMetricsDockerComposeConnectionDetailsFactory}.
+ *
+ * @author Eddú Meléndez
+ */
+public class OpenTelemetryMetricsDockerComposeConnectionDetailsFactoryIntegrationTests
+		extends AbstractDockerComposeIntegrationTests {
+
+	OpenTelemetryMetricsDockerComposeConnectionDetailsFactoryIntegrationTests() {
+		super("otlp-compose.yaml", DockerImageNames.opentelemetry());
+	}
+
+	@Test
+	void runCreatesConnectionDetails() {
+		OtlpMetricsConnectionDetails connectionDetails = run(OtlpMetricsConnectionDetails.class);
+		assertThat(connectionDetails.getUrl()).startsWith("http://").endsWith("/v1/metrics");
+	}
+
+}

spring-boot-project/spring-boot-docker-compose/src/test/java/org/springframework/boot/docker/compose/service/connection/otlp/OpenTelemetryTracingDockerComposeConnectionDetailsFactoryIntegrationTests.java

@@ -0,0 +1,46 @@
+/*
+ * 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.docker.compose.service.connection.otlp;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.actuate.autoconfigure.tracing.otlp.OtlpTracingConnectionDetails;
+import org.springframework.boot.docker.compose.service.connection.test.AbstractDockerComposeIntegrationTests;
+import org.springframework.boot.testsupport.testcontainers.DockerImageNames;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for
+ * {@link OpenTelemetryTracingDockerComposeConnectionDetailsFactory}.
+ *
+ * @author Eddú Meléndez
+ */
+public class OpenTelemetryTracingDockerComposeConnectionDetailsFactoryIntegrationTests
+		extends AbstractDockerComposeIntegrationTests {
+
+	OpenTelemetryTracingDockerComposeConnectionDetailsFactoryIntegrationTests() {
+		super("otlp-compose.yaml", DockerImageNames.opentelemetry());
+	}
+
+	@Test
+	void runCreatesConnectionDetails() {
+		OtlpTracingConnectionDetails connectionDetails = run(OtlpTracingConnectionDetails.class);
+		assertThat(connectionDetails.getEndpoint()).startsWith("http://").endsWith("/v1/traces");
+	}
+
+}

spring-boot-project/spring-boot-docker-compose/src/test/resources/org/springframework/boot/docker/compose/service/connection/otlp/otlp-compose.yaml

@@ -0,0 +1,5 @@
+services:
+  otlp:
+    image: '{imageName}'
+    ports:
+      - '4318'

spring-boot-project/spring-boot-docs/src/docs/asciidoc/features/docker-compose.adoc

@@ -76,6 +76,12 @@ The following service connections are currently supported:
 | `MongoConnectionDetails`
 | Containers named "mongo"
 
+| `OtlpMetricsConnectionDetails`
+| Containers named "otel/opentelemetry-collector-contrib"
+
+| `OtlpTracingConnectionDetails`
+| Containers named "otel/opentelemetry-collector-contrib"
+
 | `PulsarConnectionDetails`
 | Containers named "apachepulsar/pulsar"
 

spring-boot-project/spring-boot-docs/src/docs/asciidoc/features/testing.adoc

@@ -992,6 +992,12 @@ The following service connection factories are provided in the `spring-boot-test
 | `Neo4jConnectionDetails`
 | Containers of type `Neo4jContainer`
 
+| `OtlpMetricsConnectionDetails`
+| Containers named "otel/opentelemetry-collector-contrib"
+
+| `OtlpTracingConnectionDetails`
+| Containers named "otel/opentelemetry-collector-contrib"
+
 | `PulsarConnectionDetails`
 | Containers of type `PulsarContainer`
 

spring-boot-project/spring-boot-testcontainers/build.gradle

@@ -37,6 +37,10 @@ dependencies {
 	testImplementation(project(":spring-boot-project:spring-boot-tools:spring-boot-test-support"))
 	testImplementation(project(":spring-boot-project:spring-boot-test"))
 	testImplementation("ch.qos.logback:logback-classic")
+	testImplementation("io.micrometer:micrometer-registry-otlp")
+	testImplementation("io.rest-assured:rest-assured") {
+		exclude group: "commons-logging", module: "commons-logging"
+	}
 	testImplementation("org.apache.activemq:activemq-client-jakarta")
 	testImplementation("org.assertj:assertj-core")
 	testImplementation("org.awaitility:awaitility")

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/otlp/OpenTelemetryMetricsConnectionDetailsFactory.java

@@ -0,0 +1,63 @@
+/*
+ * 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.testcontainers.service.connection.otlp;
+
+import org.testcontainers.containers.Container;
+import org.testcontainers.containers.GenericContainer;
+
+import org.springframework.boot.actuate.autoconfigure.metrics.export.otlp.OtlpMetricsConnectionDetails;
+import org.springframework.boot.testcontainers.service.connection.ContainerConnectionDetailsFactory;
+import org.springframework.boot.testcontainers.service.connection.ContainerConnectionSource;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+
+/**
+ * {@link ContainerConnectionDetailsFactory} to create
+ * {@link OtlpMetricsConnectionDetails} from a
+ * {@link ServiceConnection @ServiceConnection}-annotated {@link GenericContainer} using
+ * the {@code "otel/opentelemetry-collector-contrib"} image.
+ *
+ * @author Eddú Meléndez
+ */
+class OpenTelemetryMetricsConnectionDetailsFactory
+		extends ContainerConnectionDetailsFactory<Container<?>, OtlpMetricsConnectionDetails> {
+
+	OpenTelemetryMetricsConnectionDetailsFactory() {
+		super("otel/opentelemetry-collector-contrib",
+				"org.springframework.boot.actuate.autoconfigure.metrics.export.otlp.OtlpMetricsExportAutoConfiguration");
+	}
+
+	@Override
+	protected OtlpMetricsConnectionDetails getContainerConnectionDetails(
+			ContainerConnectionSource<Container<?>> source) {
+		return new OpenTelemetryContainerMetricsConnectionDetails(source);
+	}
+
+	private static final class OpenTelemetryContainerMetricsConnectionDetails
+			extends ContainerConnectionDetails<Container<?>> implements OtlpMetricsConnectionDetails {
+
+		private OpenTelemetryContainerMetricsConnectionDetails(ContainerConnectionSource<Container<?>> source) {
+			super(source);
+		}
+
+		@Override
+		public String getUrl() {
+			return "http://%s:%d/v1/metrics".formatted(getContainer().getHost(), getContainer().getMappedPort(4318));
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/otlp/OpenTelemetryTracingConnectionDetailsFactory.java

@@ -0,0 +1,63 @@
+/*
+ * 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.testcontainers.service.connection.otlp;
+
+import org.testcontainers.containers.Container;
+import org.testcontainers.containers.GenericContainer;
+
+import org.springframework.boot.actuate.autoconfigure.tracing.otlp.OtlpTracingConnectionDetails;
+import org.springframework.boot.testcontainers.service.connection.ContainerConnectionDetailsFactory;
+import org.springframework.boot.testcontainers.service.connection.ContainerConnectionSource;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+
+/**
+ * {@link ContainerConnectionDetailsFactory} to create
+ * {@link OtlpTracingConnectionDetails} from a
+ * {@link ServiceConnection @ServiceConnection}-annotated {@link GenericContainer} using
+ * the {@code "otel/opentelemetry-collector-contrib"} image.
+ *
+ * @author Eddú Meléndez
+ */
+class OpenTelemetryTracingConnectionDetailsFactory
+		extends ContainerConnectionDetailsFactory<Container<?>, OtlpTracingConnectionDetails> {
+
+	OpenTelemetryTracingConnectionDetailsFactory() {
+		super("otel/opentelemetry-collector-contrib",
+				"org.springframework.boot.actuate.autoconfigure.tracing.otlp.OtlpAutoConfiguration");
+	}
+
+	@Override
+	protected OtlpTracingConnectionDetails getContainerConnectionDetails(
+			ContainerConnectionSource<Container<?>> source) {
+		return new OpenTelemetryTracingConnectionDetails(source);
+	}
+
+	private static final class OpenTelemetryTracingConnectionDetails extends ContainerConnectionDetails<Container<?>>
+			implements OtlpTracingConnectionDetails {
+
+		private OpenTelemetryTracingConnectionDetails(ContainerConnectionSource<Container<?>> source) {
+			super(source);
+		}
+
+		@Override
+		public String getEndpoint() {
+			return "http://%s:%d/v1/traces".formatted(getContainer().getHost(), getContainer().getMappedPort(4318));
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/otlp/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * 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.
+ */
+
+/**
+ * Support for testcontainers OpenTelemetry service connections.
+ */
+package org.springframework.boot.testcontainers.service.connection.otlp;

spring-boot-project/spring-boot-testcontainers/src/main/resources/META-INF/spring.factories

@@ -19,6 +19,8 @@ org.springframework.boot.testcontainers.service.connection.kafka.KafkaContainerC
 org.springframework.boot.testcontainers.service.connection.liquibase.LiquibaseContainerConnectionDetailsFactory,\
 org.springframework.boot.testcontainers.service.connection.mongo.MongoContainerConnectionDetailsFactory,\
 org.springframework.boot.testcontainers.service.connection.neo4j.Neo4jContainerConnectionDetailsFactory,\
+org.springframework.boot.testcontainers.service.connection.otlp.OpenTelemetryMetricsConnectionDetailsFactory,\
+org.springframework.boot.testcontainers.service.connection.otlp.OpenTelemetryTracingConnectionDetailsFactory,\
 org.springframework.boot.testcontainers.service.connection.pulsar.PulsarContainerConnectionDetailsFactory,\
 org.springframework.boot.testcontainers.service.connection.r2dbc.MariaDbR2dbcContainerConnectionDetailsFactory,\
 org.springframework.boot.testcontainers.service.connection.r2dbc.MySqlR2dbcContainerConnectionDetailsFactory,\

spring-boot-project/spring-boot-testcontainers/src/test/java/org/springframework/boot/testcontainers/service/connection/otlp/OpenTelemetryMetricsConnectionDetailsFactoryIntegrationTests.java

@@ -0,0 +1,124 @@
+/*
+ * 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.testcontainers.service.connection.otlp;
+
+import java.time.Duration;
+
+import io.micrometer.core.instrument.Clock;
+import io.micrometer.core.instrument.Counter;
+import io.micrometer.core.instrument.DistributionSummary;
+import io.micrometer.core.instrument.Gauge;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.Timer;
+import io.restassured.RestAssured;
+import io.restassured.response.Response;
+import org.awaitility.Awaitility;
+import org.junit.jupiter.api.Test;
+import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+import org.testcontainers.utility.MountableFile;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.actuate.autoconfigure.metrics.export.otlp.OtlpMetricsExportAutoConfiguration;
+import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+import org.springframework.boot.testsupport.testcontainers.DockerImageNames;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.endsWith;
+import static org.hamcrest.Matchers.matchesPattern;
+
+/**
+ * Tests for {@link OpenTelemetryMetricsConnectionDetailsFactory}.
+ *
+ * @author Eddú Meléndez
+ * @author Jonatan Ivanov
+ */
+@SpringJUnitConfig
+@TestPropertySource(properties = { "management.otlp.metrics.export.resource-attributes.service.name=test",
+		"management.otlp.metrics.export.step=1s" })
+@Testcontainers(disabledWithoutDocker = true)
+class OpenTelemetryMetricsConnectionDetailsFactoryIntegrationTests {
+
+	private static final String OPENMETRICS_001 = "application/openmetrics-text; version=0.0.1; charset=utf-8";
+
+	private static final String CONFIG_FILE_NAME = "collector-config.yml";
+
+	@Container
+	@ServiceConnection
+	static final GenericContainer<?> container = new GenericContainer<>(DockerImageNames.opentelemetry())
+		.withCommand("--config=/etc/" + CONFIG_FILE_NAME)
+		.withCopyToContainer(MountableFile.forClasspathResource(CONFIG_FILE_NAME), "/etc/" + CONFIG_FILE_NAME)
+		.withExposedPorts(4318, 9090);
+
+	@Autowired
+	private MeterRegistry meterRegistry;
+
+	@Test
+	void connectionCanBeMadeToOpenTelemetryCollectorContainer() {
+		Counter.builder("test.counter").register(this.meterRegistry).increment(42);
+		Gauge.builder("test.gauge", () -> 12).register(this.meterRegistry);
+		Timer.builder("test.timer").register(this.meterRegistry).record(Duration.ofMillis(123));
+		DistributionSummary.builder("test.distributionsummary").register(this.meterRegistry).record(24);
+
+		Awaitility.await()
+			.atMost(Duration.ofSeconds(5))
+			.pollDelay(Duration.ofMillis(100))
+			.pollInterval(Duration.ofMillis(100))
+			.untilAsserted(() -> whenPrometheusScraped().then()
+				.statusCode(200)
+				.contentType(OPENMETRICS_001)
+				.body(endsWith("# EOF\n")));
+
+		whenPrometheusScraped().then()
+			.body(containsString(
+					"{job=\"test\",service_name=\"test\",telemetry_sdk_language=\"java\",telemetry_sdk_name=\"io.micrometer\""),
+
+					matchesPattern("(?s)^.*test_counter\\{.+} 42\\.0\\n.*$"),
+					matchesPattern("(?s)^.*test_gauge\\{.+} 12\\.0\\n.*$"),
+
+					matchesPattern("(?s)^.*test_timer_count\\{.+} 1\\n.*$"),
+
+					matchesPattern("(?s)^.*test_timer_sum\\{.+} 123\\.0\\n.*$"),
+					matchesPattern("(?s)^.*test_timer_bucket\\{.+,le=\"\\+Inf\"} 1\\n.*$"),
+
+					matchesPattern("(?s)^.*test_distributionsummary_count\\{.+} 1\\n.*$"),
+					matchesPattern("(?s)^.*test_distributionsummary_sum\\{.+} 24\\.0\\n.*$"),
+					matchesPattern("(?s)^.*test_distributionsummary_bucket\\{.+,le=\"\\+Inf\"} 1\\n.*$"));
+	}
+
+	private Response whenPrometheusScraped() {
+		return RestAssured.given().port(container.getMappedPort(9090)).accept(OPENMETRICS_001).when().get("/metrics");
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@ImportAutoConfiguration(OtlpMetricsExportAutoConfiguration.class)
+	static class TestConfiguration {
+
+		@Bean
+		Clock customClock() {
+			return Clock.SYSTEM;
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-testcontainers/src/test/java/org/springframework/boot/testcontainers/service/connection/otlp/OpenTelemetryTracingConnectionDetailsFactoryIntegrationTests.java

@@ -0,0 +1,64 @@
+/*
+ * 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.testcontainers.service.connection.otlp;
+
+import org.junit.jupiter.api.Test;
+import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.actuate.autoconfigure.tracing.otlp.OtlpAutoConfiguration;
+import org.springframework.boot.actuate.autoconfigure.tracing.otlp.OtlpTracingConnectionDetails;
+import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
+import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
+import org.springframework.boot.testsupport.testcontainers.DockerImageNames;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link OpenTelemetryTracingConnectionDetailsFactory}.
+ *
+ * @author Eddú Meléndez
+ */
+@SpringJUnitConfig
+@Testcontainers(disabledWithoutDocker = true)
+class OpenTelemetryTracingConnectionDetailsFactoryIntegrationTests {
+
+	@Container
+	@ServiceConnection
+	static final GenericContainer<?> container = new GenericContainer<>(DockerImageNames.opentelemetry())
+		.withExposedPorts(4318);
+
+	@Autowired
+	private OtlpTracingConnectionDetails connectionDetails;
+
+	@Test
+	void connectionCanBeMadeToOpenTelemetryContainer() {
+		assertThat(this.connectionDetails.getEndpoint())
+			.isEqualTo("http://" + container.getHost() + ":" + container.getMappedPort(4318) + "/v1/traces");
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@ImportAutoConfiguration(OtlpAutoConfiguration.class)
+	static class TestConfiguration {
+
+	}
+
+}

spring-boot-project/spring-boot-testcontainers/src/test/resources/collector-config.yml

@@ -0,0 +1,20 @@
+receivers:
+  otlp:
+    protocols:
+      grpc:
+      http:
+
+exporters:
+  # https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/exporter/prometheusexporter
+  prometheus:
+    endpoint: '0.0.0.0:9090'
+    metric_expiration: 1m
+    enable_open_metrics: true
+    resource_to_telemetry_conversion:
+      enabled: true
+
+service:
+  pipelines:
+    metrics:
+      receivers: [otlp]
+      exporters: [prometheus]

spring-boot-project/spring-boot-tools/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/testcontainers/DockerImageNames.java

@@ -51,6 +51,8 @@ public final class DockerImageNames {
 
 	private static final String ORACLE_XE_VERSION = "18.4.0-slim";
 
+	private static final String OPENTELEMETRY_VERSION = "0.75.0";
+
 	private static final String PULSAR_VERSION = "3.1.0";
 
 	private static final String POSTGRESQL_VERSION = "14.0";
@@ -156,6 +158,14 @@ public final class DockerImageNames {
 		return DockerImageName.parse("gvenzl/oracle-xe").withTag(ORACLE_XE_VERSION);
 	}
 
+	/**
+	 * Return a {@link DockerImageName} suitable for running the Oracle database.
+	 * @return a docker image name for running the Oracle database
+	 */
+	public static DockerImageName opentelemetry() {
+		return DockerImageName.parse("otel/opentelemetry-collector-contrib").withTag(OPENTELEMETRY_VERSION);
+	}
+
 	/**
 	 * Return a {@link DockerImageName} suitable for running Apache Pulsar.
 	 * @return a docker image name for running pulsar