Support multiple Docker Compose files

Closes gh-41691

spring-boot-project/spring-boot-docker-compose/src/dockerTest/java/org/springframework/boot/docker/compose/core/DockerCliIntegrationTests.java

@@ -67,7 +67,7 @@ void runBasicCommand() {
 
 	@Test
 	void runLifecycle() throws IOException {
-		File composeFile = createComposeFile();
+		File composeFile = createComposeFile("redis-compose.yaml");
 		DockerCli cli = new DockerCli(null, DockerComposeFile.of(composeFile), Collections.emptySet());
 		try {
 			// Verify that no services are running (this is a fresh compose project)
@@ -103,6 +103,26 @@ void runLifecycle() throws IOException {
 		}
 	}
 
+	@Test
+	void shouldWorkWithMultipleComposeFiles() throws IOException {
+		List<File> composeFiles = createComposeFiles();
+		DockerCli cli = new DockerCli(null, DockerComposeFile.of(composeFiles), Collections.emptySet());
+		try {
+			// List the config and verify that both redis are there
+			DockerCliComposeConfigResponse config = cli.run(new ComposeConfig());
+			assertThat(config.services()).containsOnlyKeys("redis1", "redis2");
+			// Run up
+			cli.run(new ComposeUp(LogLevel.INFO, Collections.emptyList()));
+			// Run ps and use id to run inspect on the id
+			List<DockerCliComposePsResponse> ps = cli.run(new ComposePs());
+			assertThat(ps).hasSize(2);
+		}
+		finally {
+			// Clean up in any case
+			quietComposeDown(cli);
+		}
+	}
+
 	private static void quietComposeDown(DockerCli cli) {
 		try {
 			cli.run(new ComposeDown(Duration.ZERO, Collections.emptyList()));
@@ -112,13 +132,21 @@ private static void quietComposeDown(DockerCli cli) {
 		}
 	}
 
-	private static File createComposeFile() throws IOException {
-		File composeFile = new ClassPathResource("redis-compose.yaml", DockerCliIntegrationTests.class).getFile();
-		File tempComposeFile = Path.of(tempDir.toString(), composeFile.getName()).toFile();
-		String composeFileContent = FileCopyUtils.copyToString(new FileReader(composeFile));
-		composeFileContent = composeFileContent.replace("{imageName}", TestImage.REDIS.toString());
-		FileCopyUtils.copy(composeFileContent, new FileWriter(tempComposeFile));
-		return tempComposeFile;
+	private static File createComposeFile(String resource) throws IOException {
+		File source = new ClassPathResource(resource, DockerCliIntegrationTests.class).getFile();
+		File target = Path.of(tempDir.toString(), source.getName()).toFile();
+		String content = FileCopyUtils.copyToString(new FileReader(source));
+		content = content.replace("{imageName}", TestImage.REDIS.toString());
+		try (FileWriter writer = new FileWriter(target)) {
+			FileCopyUtils.copy(content, writer);
+		}
+		return target;
+	}
+
+	private static List<File> createComposeFiles() throws IOException {
+		File file1 = createComposeFile("1.yaml");
+		File file2 = createComposeFile("2.yaml");
+		return List.of(file1, file2);
 	}
 
 }

spring-boot-project/spring-boot-docker-compose/src/dockerTest/resources/org/springframework/boot/docker/compose/core/1.yaml

@@ -0,0 +1,5 @@
+services:
+  redis1:
+    image: '{imageName}'
+    ports:
+      - '6379'

spring-boot-project/spring-boot-docker-compose/src/dockerTest/resources/org/springframework/boot/docker/compose/core/2.yaml

@@ -0,0 +1,5 @@
+services:
+  redis2:
+    image: '{imageName}'
+    ports:
+      - '6379'

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/core/DockerCli.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -94,8 +94,10 @@ private List<String> createCommand(Type type) {
 			case DOCKER_COMPOSE -> {
 				List<String> result = new ArrayList<>(this.dockerCommands.get(type));
 				if (this.composeFile != null) {
-					result.add("--file");
-					result.add(this.composeFile.toString());
+					for (File file : this.composeFile.getFiles()) {
+						result.add("--file");
+						result.add(file.getPath());
+					}
 				}
 				result.add("--ansi");
 				result.add("never");

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/core/DockerComposeFile.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -21,7 +21,10 @@
 import java.io.UncheckedIOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import org.springframework.util.Assert;
 
@@ -33,24 +36,39 @@
  * @author Phillip Webb
  * @since 3.1.0
  * @see #of(File)
+ * @see #of(Collection)
  * @see #find(File)
  */
 public final class DockerComposeFile {
 
 	private static final List<String> SEARCH_ORDER = List.of("compose.yaml", "compose.yml", "docker-compose.yaml",
 			"docker-compose.yml");
 
-	private final File file;
+	private final List<File> files;
 
-	private DockerComposeFile(File file) {
+	private DockerComposeFile(List<File> files) {
+		Assert.state(!files.isEmpty(), "Files must not be empty");
+		this.files = files.stream().map(DockerComposeFile::toCanonicalFile).toList();
+	}
+
+	private static File toCanonicalFile(File file) {
 		try {
-			this.file = file.getCanonicalFile();
+			return file.getCanonicalFile();
 		}
 		catch (IOException ex) {
 			throw new UncheckedIOException(ex);
 		}
 	}
 
+	/**
+	 * Returns the source docker compose files.
+	 * @return the source docker compose files
+	 * @since 3.4.0
+	 */
+	public List<File> getFiles() {
+		return this.files;
+	}
+
 	@Override
 	public boolean equals(Object obj) {
 		if (this == obj) {
@@ -60,17 +78,20 @@ public boolean equals(Object obj) {
 			return false;
 		}
 		DockerComposeFile other = (DockerComposeFile) obj;
-		return this.file.equals(other.file);
+		return this.files.equals(other.files);
 	}
 
 	@Override
 	public int hashCode() {
-		return this.file.hashCode();
+		return this.files.hashCode();
 	}
 
 	@Override
 	public String toString() {
-		return this.file.toString();
+		if (this.files.size() == 1) {
+			return this.files.get(0).getPath();
+		}
+		return this.files.stream().map(File::toString).collect(Collectors.joining(", "));
 	}
 
 	/**
@@ -111,7 +132,23 @@ public static DockerComposeFile of(File file) {
 		Assert.notNull(file, "File must not be null");
 		Assert.isTrue(file.exists(), () -> "Docker Compose file '%s' does not exist".formatted(file));
 		Assert.isTrue(file.isFile(), () -> "Docker compose file '%s' is not a file".formatted(file));
-		return new DockerComposeFile(file);
+		return new DockerComposeFile(Collections.singletonList(file));
+	}
+
+	/**
+	 * Creates a new {@link DockerComposeFile} for the given {@link File files}.
+	 * @param files the source files
+	 * @return the docker compose file
+	 * @since 3.4.0
+	 */
+	public static DockerComposeFile of(Collection<? extends File> files) {
+		Assert.notNull(files, "Files must not be null");
+		for (File file : files) {
+			Assert.notNull(file, "File must not be null");
+			Assert.isTrue(file.exists(), () -> "Docker Compose file '%s' does not exist".formatted(file));
+			Assert.isTrue(file.isFile(), () -> "Docker compose file '%s' is not a file".formatted(file));
+		}
+		return new DockerComposeFile(List.copyOf(files));
 	}
 
 }

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/core/DockerComposeOrigin.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -31,7 +31,7 @@ public record DockerComposeOrigin(DockerComposeFile composeFile, String serviceN
 
 	@Override
 	public String toString() {
-		return "Docker compose service '%s' defined in '%s'".formatted(this.serviceName,
+		return "Docker compose service '%s' defined in %s".formatted(this.serviceName,
 				(this.composeFile != null) ? this.composeFile : "default compose file");
 	}
 

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/lifecycle/DockerComposeLifecycleManager.java

@@ -39,6 +39,7 @@
 import org.springframework.context.event.SimpleApplicationEventMulticaster;
 import org.springframework.core.log.LogMessage;
 import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
 
 /**
  * Manages the lifecycle for docker compose services.
@@ -110,7 +111,7 @@ void start() {
 		Set<String> activeProfiles = this.properties.getProfiles().getActive();
 		DockerCompose dockerCompose = getDockerCompose(composeFile, activeProfiles);
 		if (!dockerCompose.hasDefinedServices()) {
-			logger.warn(LogMessage.format("No services defined in Docker Compose file '%s' with active profiles %s",
+			logger.warn(LogMessage.format("No services defined in Docker Compose file %s with active profiles %s",
 					composeFile, activeProfiles));
 			return;
 		}
@@ -145,11 +146,16 @@ void start() {
 	}
 
 	protected DockerComposeFile getComposeFile() {
-		DockerComposeFile composeFile = (this.properties.getFile() != null)
-				? DockerComposeFile.of(this.properties.getFile()) : DockerComposeFile.find(this.workingDirectory);
+		DockerComposeFile composeFile = (CollectionUtils.isEmpty(this.properties.getFile()))
+				? DockerComposeFile.find(this.workingDirectory) : DockerComposeFile.of(this.properties.getFile());
 		Assert.state(composeFile != null, () -> "No Docker Compose file found in directory '%s'".formatted(
 				((this.workingDirectory != null) ? this.workingDirectory : new File(".")).toPath().toAbsolutePath()));
-		logger.info(LogMessage.format("Using Docker Compose file '%s'", composeFile));
+		if (composeFile.getFiles().size() == 1) {
+			logger.info(LogMessage.format("Using Docker Compose file %s", composeFile.getFiles().get(0)));
+		}
+		else {
+			logger.info(LogMessage.format("Using Docker Compose files %s", composeFile.toString()));
+		}
 		return composeFile;
 	}
 

spring-boot-project/spring-boot-docker-compose/src/main/java/org/springframework/boot/docker/compose/lifecycle/DockerComposeProperties.java

@@ -49,7 +49,7 @@ public class DockerComposeProperties {
 	/**
 	 * Path to a specific docker compose configuration file.
 	 */
-	private File file;
+	private final List<File> file = new ArrayList<>();
 
 	/**
 	 * Docker compose lifecycle management.
@@ -88,14 +88,10 @@ public void setEnabled(boolean enabled) {
 		this.enabled = enabled;
 	}
 
-	public File getFile() {
+	public List<File> getFile() {
 		return this.file;
 	}
 
-	public void setFile(File file) {
-		this.file = file;
-	}
-
 	public LifecycleManagement getLifecycleManagement() {
 		return this.lifecycleManagement;
 	}

spring-boot-project/spring-boot-docker-compose/src/test/java/org/springframework/boot/docker/compose/core/DockerComposeFileTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -18,6 +18,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.util.List;
 
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.io.TempDir;
@@ -59,12 +60,20 @@ void toStringReturnsFileName() throws Exception {
 		assertThat(composeFile.toString()).endsWith(File.separator + "compose.yml");
 	}
 
+	@Test
+	void toStringReturnsFileNameList() throws Exception {
+		File file1 = createTempFile("1.yml");
+		File file2 = createTempFile("2.yml");
+		DockerComposeFile composeFile = DockerComposeFile.of(List.of(file1, file2));
+		assertThat(composeFile).hasToString(file1 + ", " + file2);
+	}
+
 	@Test
 	void findFindsSingleFile() throws Exception {
 		File file = new File(this.temp, "docker-compose.yml");
 		FileCopyUtils.copy(new byte[0], file);
 		DockerComposeFile composeFile = DockerComposeFile.find(file.getParentFile());
-		assertThat(composeFile.toString()).endsWith(File.separator + "docker-compose.yml");
+		assertThat(composeFile.getFiles()).containsExactly(file);
 	}
 
 	@Test
@@ -74,7 +83,7 @@ void findWhenMultipleFilesPicksBest() throws Exception {
 		File f2 = new File(this.temp, "compose.yml");
 		FileCopyUtils.copy(new byte[0], f2);
 		DockerComposeFile composeFile = DockerComposeFile.find(f1.getParentFile());
-		assertThat(composeFile.toString()).endsWith(File.separator + "compose.yml");
+		assertThat(composeFile.getFiles()).containsExactly(f2);
 	}
 
 	@Test
@@ -94,24 +103,31 @@ void findWhenWorkingDirectoryDoesNotExistReturnsNull() {
 
 	@Test
 	void findWhenWorkingDirectoryIsNotDirectoryThrowsException() throws Exception {
-		File file = new File(this.temp, "iamafile");
-		FileCopyUtils.copy(new byte[0], file);
+		File file = createTempFile("iamafile");
 		assertThatIllegalArgumentException().isThrownBy(() -> DockerComposeFile.find(file))
 			.withMessageEndingWith("is not a directory");
 	}
 
 	@Test
 	void ofReturnsDockerComposeFile() throws Exception {
-		File file = new File(this.temp, "anyfile.yml");
-		FileCopyUtils.copy(new byte[0], file);
+		File file = createTempFile("compose.yml");
 		DockerComposeFile composeFile = DockerComposeFile.of(file);
 		assertThat(composeFile).isNotNull();
-		assertThat(composeFile).hasToString(file.getCanonicalPath());
+		assertThat(composeFile.getFiles()).containsExactly(file);
+	}
+
+	@Test
+	void ofWithMultipleFilesReturnsDockerComposeFile() throws Exception {
+		File file1 = createTempFile("1.yml");
+		File file2 = createTempFile("2.yml");
+		DockerComposeFile composeFile = DockerComposeFile.of(List.of(file1, file2));
+		assertThat(composeFile).isNotNull();
+		assertThat(composeFile.getFiles()).containsExactly(file1, file2);
 	}
 
 	@Test
 	void ofWhenFileIsNullThrowsException() {
-		assertThatIllegalArgumentException().isThrownBy(() -> DockerComposeFile.of(null))
+		assertThatIllegalArgumentException().isThrownBy(() -> DockerComposeFile.of((File) null))
 			.withMessage("File must not be null");
 	}
 
@@ -129,9 +145,13 @@ void ofWhenFileIsNotFileThrowsException() {
 	}
 
 	private DockerComposeFile createComposeFile(String name) throws IOException {
+		return DockerComposeFile.of(createTempFile(name));
+	}
+
+	private File createTempFile(String name) throws IOException {
 		File file = new File(this.temp, name);
 		FileCopyUtils.copy(new byte[0], file);
-		return DockerComposeFile.of(file);
+		return file.getCanonicalFile();
 	}
 
 }