Check distro instead of stack ID for run image

Stack IDs are deprecated since Platform API 0.12 in favor of target data. Comparing them produced false warnings for valid combinations, e.g. the default builder with its tiny run image ('resolute' vs 'resolute.tiny'). Compare the OS distribution instead, read from the io.buildpacks.base.distro.* labels with a fallback to the io.buildpacks.stack.distro.* labels set by Paketo images. A missing name or version matches any value, as in the lifecycle. Deprecate BuildLog.stackIdsDoNotMatch in favor of distrosDoNotMatch. Closes gh-51851
2026-09-25 02:49:03 +00:00 · 2026-09-24 14:03:08 +02:00
parent f88aae6324
commit 8ce3f594fe
11 changed files with 642 additions and 209 deletions
@@ -129,9 +129,9 @@ public abstract class AbstractBuildLog implements BuildLog {
 	}

 	@Override
-	public void stackIdsDoNotMatch(String runImageStackId, String builderImageStackId) {
-		log("Warning: Run image stack '%s' does not match builder stack '%s'. Stack IDs are deprecated, but the images may not be compatible."
-			.formatted(runImageStackId, builderImageStackId));
+	public void distrosDoNotMatch(String runImageDistro, String builderImageDistro) {
+		log("Warning: Run image distribution '%s' does not match builder distribution '%s'. The images may not be compatible."
+			.formatted(runImageDistro, builderImageDistro));
 		log();
 	}

@@ -141,10 +141,23 @@ public interface BuildLog {
 	 * @param runImageStackId the stack ID of the run image
 	 * @param builderImageStackId the stack ID of the builder image
 	 * @since 4.0.9
+	 * @deprecated since 4.2.0 for removal in 4.4.0 in favor of
+	 * {@link #distrosDoNotMatch(String, String)}. This method is no longer called.
 	 */
+	@Deprecated(since = "4.2.0", forRemoval = true)
 	default void stackIdsDoNotMatch(String runImageStackId, String builderImageStackId) {
 	}

+	/**
+	 * Log that the OS distribution of the run image does not match the OS distribution of
+	 * the builder image.
+	 * @param runImageDistro the OS distribution of the run image
+	 * @param builderImageDistro the OS distribution of the builder image
+	 * @since 4.2.0
+	 */
+	default void distrosDoNotMatch(String runImageDistro, String builderImageDistro) {
+	}
+
 	/**
 	 * Factory method that returns a {@link BuildLog} the outputs to {@link System#out}.
 	 * @return a build log instance that logs to system out
@@ -120,7 +120,7 @@ public class Builder {
 			request = request.withRunImage(request.getRunImage().withDigest(runImage.getPrimaryDigest()));
 			runImage = imageFetcher.fetchImage(ImageType.RUNNER, request.getRunImage(), platform);
 		}
-		warnIfStackIdsDoNotMatch(runImage, builderImage);
+		warnIfDistrosDoNotMatch(runImage, builderImage);
 		BuildOwner buildOwner = BuildOwner.fromEnv(builderImage.getConfig().getEnv());
 		BuildpackLayersMetadata buildpackLayersMetadata = BuildpackLayersMetadata.fromImage(builderImage);
 		Buildpacks buildpacks = getBuildpacks(request, imageFetcher, platform, builderMetadata,
@@ -160,11 +160,11 @@ public class Builder {
 		return ImageReference.of(runImageName).inTaggedOrDigestForm();
 	}

-	private void warnIfStackIdsDoNotMatch(Image runImage, Image builderImage) {
-		StackId runImageStackId = StackId.fromImage(runImage);
-		StackId builderImageStackId = StackId.fromImage(builderImage);
-		if (runImageStackId.hasId() && builderImageStackId.hasId() && !runImageStackId.equals(builderImageStackId)) {
-			this.log.stackIdsDoNotMatch(runImageStackId.toString(), builderImageStackId.toString());
+	private void warnIfDistrosDoNotMatch(Image runImage, Image builderImage) {
+		Distro runImageDistro = Distro.fromImage(runImage);
+		Distro builderImageDistro = Distro.fromImage(builderImage);
+		if (!runImageDistro.matches(builderImageDistro)) {
+			this.log.distrosDoNotMatch(runImageDistro.toString(), builderImageDistro.toString());
 		}
 	}

@@ -0,0 +1,107 @@
+/*
+ * Copyright 2012-present 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.buildpack.platform.build;
+
+import java.util.Map;
+
+import org.jspecify.annotations.Nullable;
+
+import org.springframework.boot.buildpack.platform.docker.type.Image;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+/**
+ * The OS distribution of an image, as described by the target data of the CNB platform
+ * specification.
+ *
+ * @author Moritz Halbritter
+ */
+final class Distro {
+
+	private static final String NAME_LABEL = "io.buildpacks.base.distro.name";
+
+	private static final String VERSION_LABEL = "io.buildpacks.base.distro.version";
+
+	// Paketo images only set these non-spec labels
+	private static final String STACK_NAME_LABEL = "io.buildpacks.stack.distro.name";
+
+	private static final String STACK_VERSION_LABEL = "io.buildpacks.stack.distro.version";
+
+	private final @Nullable String name;
+
+	private final @Nullable String version;
+
+	private Distro(@Nullable String name, @Nullable String version) {
+		this.name = name;
+		this.version = version;
+	}
+
+	/**
+	 * Return whether this distribution matches the given distribution. A missing name or
+	 * version matches any value.
+	 * @param other the distribution to compare with
+	 * @return {@code true} if the distributions match
+	 */
+	boolean matches(Distro other) {
+		return matches(this.name, other.name) && matches(this.version, other.version);
+	}
+
+	private static boolean matches(@Nullable String value, @Nullable String other) {
+		if (value == null || other == null) {
+			return true;
+		}
+		return value.equals(other);
+	}
+
+	@Override
+	public String toString() {
+		StringBuilder result = new StringBuilder();
+		if (this.name != null) {
+			result.append(this.name);
+		}
+		if (this.version != null) {
+			if (!result.isEmpty()) {
+				result.append(" ");
+			}
+			result.append(this.version);
+		}
+		return result.toString();
+	}
+
+	/**
+	 * Factory method to create a {@link Distro} from an {@link Image}.
+	 * @param image the source image
+	 * @return the extracted distribution
+	 */
+	static Distro fromImage(Image image) {
+		Assert.notNull(image, "'image' must not be null");
+		Map<String, String> labels = image.getConfig().getLabels();
+		String name = getLabel(labels, NAME_LABEL, STACK_NAME_LABEL);
+		String version = getLabel(labels, VERSION_LABEL, STACK_VERSION_LABEL);
+		return new Distro(name, version);
+	}
+
+	private static @Nullable String getLabel(Map<String, String> labels, String label, String fallbackLabel) {
+		String value = labels.get(label);
+		if (StringUtils.hasText(value)) {
+			return value;
+		}
+		value = labels.get(fallbackLabel);
+		return StringUtils.hasText(value) ? value : null;
+	}
+
+}
@@ -1,98 +0,0 @@
-/*
- * Copyright 2012-present 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.buildpack.platform.build;
-
-import java.util.Objects;
-
-import org.jspecify.annotations.Nullable;
-
-import org.springframework.boot.buildpack.platform.docker.type.Image;
-import org.springframework.boot.buildpack.platform.docker.type.ImageConfig;
-import org.springframework.util.Assert;
-
-/**
- * A Stack ID.
- *
- * @author Phillip Webb
- * @author Andy Wilkinson
- */
-class StackId {
-
-	private static final String LABEL_NAME = "io.buildpacks.stack.id";
-
-	private final @Nullable String value;
-
-	StackId(@Nullable String value) {
-		this.value = value;
-	}
-
-	@Override
-	public boolean equals(@Nullable Object obj) {
-		if (this == obj) {
-			return true;
-		}
-		if (obj == null || getClass() != obj.getClass()) {
-			return false;
-		}
-		return Objects.equals(this.value, ((StackId) obj).value);
-	}
-
-	boolean hasId() {
-		return this.value != null;
-	}
-
-	@Override
-	public int hashCode() {
-		return Objects.hashCode(this.value);
-	}
-
-	@Override
-	public String toString() {
-		return (this.value != null) ? this.value : "<null>";
-	}
-
-	/**
-	 * Factory method to create a {@link StackId} from an {@link Image}.
-	 * @param image the source image
-	 * @return the extracted stack ID
-	 */
-	static StackId fromImage(Image image) {
-		Assert.notNull(image, "'image' must not be null");
-		return fromImageConfig(image.getConfig());
-	}
-
-	/**
-	 * Factory method to create a {@link StackId} from an {@link ImageConfig}.
-	 * @param imageConfig the source image config
-	 * @return the extracted stack ID
-	 */
-	private static StackId fromImageConfig(ImageConfig imageConfig) {
-		String value = imageConfig.getLabels().get(LABEL_NAME);
-		return new StackId(value);
-	}
-
-	/**
-	 * Factory method to create a {@link StackId} with a given value.
-	 * @param value the stack ID value
-	 * @return a new stack ID instance
-	 */
-	static StackId of(String value) {
-		Assert.hasText(value, "'value' must not be empty");
-		return new StackId(value);
-	}
-
-}
@@ -491,22 +491,25 @@ class BuilderTests {
 	}

 	@Test
-	void buildWhenStackIdDoesNotMatchLogsWarning() throws Exception {
-		TestPrintStream out = new TestPrintStream();
-		DockerApi docker = mockDockerApi();
-		Image builderImage = loadImage("image.json");
-		Image runImage = loadImage("run-image-with-bad-stack.json");
-		given(docker.image().pull(eq(LATEST_PAKETO_BUILDPACKS_BUILDER), isNull(), any(), isNull()))
-			.willAnswer(withPulledImage(builderImage));
-		given(docker.image().pull(eq(BASE_CNB), eq(ImagePlatform.from(builderImage)), any(), isNull()))
-			.willAnswer(withPulledImage(runImage));
-		Builder builder = new Builder(BuildLog.to(out), docker, null);
-		BuildRequest request = getTestRequest();
-		builder.build(request);
-		assertThat(out.toString()).contains(
-				"Warning: Run image stack 'org.cloudfoundry.stacks.cfwindowsfs3' does not match builder stack 'io.buildpacks.stacks.bionic'");
-		assertThat(out.toString()).contains("Running creator");
-		assertThat(out.toString()).contains("Successfully built image 'docker.io/library/my-application:latest'");
+	void shouldNotWarnWhenStackIdsDifferWithoutDistro() throws Exception {
+		String output = buildWith("image.json", "run-image-with-bad-stack.json");
+		assertThat(output).doesNotContain("Warning");
+		assertThat(output).contains("Successfully built image 'docker.io/library/my-application:latest'");
+	}
+
+	@Test
+	void shouldNotWarnWhenStackIdsDifferButDistrosMatch() throws Exception {
+		String output = buildWith("image-with-distro.json", "run-image-with-same-distro.json");
+		assertThat(output).doesNotContain("Warning");
+		assertThat(output).contains("Successfully built image 'docker.io/library/my-application:latest'");
+	}
+
+	@Test
+	void shouldWarnWhenDistrosDoNotMatch() throws Exception {
+		String output = buildWith("image-with-distro.json", "run-image-with-other-distro.json");
+		assertThat(output).contains(
+				"Warning: Run image distribution 'ubuntu 24.04' does not match builder distribution 'ubuntu 26.04'");
+		assertThat(output).contains("Successfully built image 'docker.io/library/my-application:latest'");
 	}

 	@Test
@@ -597,6 +600,20 @@ class BuilderTests {
 		return BuildRequest.of(name, (owner) -> content).withBuilder(PAKETO_BUILDPACKS_BUILDER).withTrustBuilder(true);
 	}

+	private String buildWith(String builderImageName, String runImageName) throws Exception {
+		TestPrintStream out = new TestPrintStream();
+		DockerApi docker = mockDockerApi();
+		Image builderImage = loadImage(builderImageName);
+		Image runImage = loadImage(runImageName);
+		given(docker.image().pull(eq(LATEST_PAKETO_BUILDPACKS_BUILDER), isNull(), any(), isNull()))
+			.willAnswer(withPulledImage(builderImage));
+		given(docker.image().pull(eq(BASE_CNB), eq(ImagePlatform.from(builderImage)), any(), isNull()))
+			.willAnswer(withPulledImage(runImage));
+		Builder builder = new Builder(BuildLog.to(out), docker, null);
+		builder.build(getTestRequest());
+		return out.toString();
+	}
+
 	private Image loadImage(String name) throws IOException {
 		return Image.of(getClass().getResourceAsStream(name));
 	}
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2012-present 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.buildpack.platform.build;
+
+import java.util.Collections;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.buildpack.platform.docker.type.Image;
+import org.springframework.boot.buildpack.platform.docker.type.ImageConfig;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+/**
+ * Tests for {@link Distro}.
+ *
+ * @author Moritz Halbritter
+ */
+class DistroTests {
+
+	@Test
+	@SuppressWarnings("NullAway") // Test null check
+	void shouldFailWhenImageIsNull() {
+		assertThatIllegalArgumentException().isThrownBy(() -> Distro.fromImage(null))
+			.withMessage("'image' must not be null");
+	}
+
+	@Test
+	void shouldReadBaseLabels() {
+		Distro distro = Distro.fromImage(image(
+				Map.of("io.buildpacks.base.distro.name", "ubuntu", "io.buildpacks.base.distro.version", "26.04")));
+		assertThat(distro).hasToString("ubuntu 26.04");
+	}
+
+	@Test
+	void shouldFormatNameOnly() {
+		Distro distro = Distro.fromImage(image(Map.of("io.buildpacks.base.distro.name", "ubuntu")));
+		assertThat(distro).hasToString("ubuntu");
+	}
+
+	@Test
+	void shouldFormatVersionOnly() {
+		Distro distro = Distro.fromImage(image(Map.of("io.buildpacks.base.distro.version", "26.04")));
+		assertThat(distro).hasToString("26.04");
+	}
+
+	@Test
+	void shouldFormatEmptyWhenLabelsAreMissing() {
+		Distro distro = Distro.fromImage(image(Collections.emptyMap()));
+		assertThat(distro).hasToString("");
+	}
+
+	@Test
+	void shouldFallBackToStackLabels() {
+		Distro distro = Distro.fromImage(image(
+				Map.of("io.buildpacks.stack.distro.name", "ubuntu", "io.buildpacks.stack.distro.version", "26.04")));
+		assertThat(distro).hasToString("ubuntu 26.04");
+	}
+
+	@Test
+	void shouldPreferBaseLabelsOverStackLabels() {
+		Distro distro = Distro
+			.fromImage(image(Map.of("io.buildpacks.base.distro.name", "ubuntu", "io.buildpacks.base.distro.version",
+					"26.04", "io.buildpacks.stack.distro.name", "debian", "io.buildpacks.stack.distro.version", "13")));
+		assertThat(distro).hasToString("ubuntu 26.04");
+	}
+
+	@Test
+	void shouldMatchWhenNameAndVersionAreEqual() {
+		Distro distro = Distro.fromImage(image(
+				Map.of("io.buildpacks.base.distro.name", "ubuntu", "io.buildpacks.base.distro.version", "26.04")));
+		Distro other = Distro.fromImage(image(
+				Map.of("io.buildpacks.stack.distro.name", "ubuntu", "io.buildpacks.stack.distro.version", "26.04")));
+		assertThat(distro.matches(other)).isTrue();
+	}
+
+	@Test
+	void shouldNotMatchWhenVersionDiffers() {
+		Distro distro = Distro.fromImage(image(
+				Map.of("io.buildpacks.base.distro.name", "ubuntu", "io.buildpacks.base.distro.version", "26.04")));
+		Distro other = Distro.fromImage(image(
+				Map.of("io.buildpacks.base.distro.name", "ubuntu", "io.buildpacks.base.distro.version", "24.04")));
+		assertThat(distro.matches(other)).isFalse();
+	}
+
+	@Test
+	void shouldNotMatchWhenNameDiffers() {
+		Distro distro = Distro.fromImage(image(Map.of("io.buildpacks.base.distro.name", "ubuntu")));
+		Distro other = Distro.fromImage(image(Map.of("io.buildpacks.base.distro.name", "debian")));
+		assertThat(distro.matches(other)).isFalse();
+	}
+
+	@Test
+	void shouldMatchWhenVersionIsMissingOnOneSide() {
+		Distro distro = Distro.fromImage(image(
+				Map.of("io.buildpacks.base.distro.name", "ubuntu", "io.buildpacks.base.distro.version", "26.04")));
+		Distro other = Distro.fromImage(image(Map.of("io.buildpacks.base.distro.name", "ubuntu")));
+		assertThat(distro.matches(other)).isTrue();
+		assertThat(other.matches(distro)).isTrue();
+	}
+
+	@Test
+	void shouldMatchWhenLabelsAreMissing() {
+		Distro distro = Distro.fromImage(image(
+				Map.of("io.buildpacks.base.distro.name", "ubuntu", "io.buildpacks.base.distro.version", "26.04")));
+		Distro other = Distro.fromImage(image(Collections.emptyMap()));
+		assertThat(distro.matches(other)).isTrue();
+		assertThat(other.matches(distro)).isTrue();
+	}
+
+	@Test
+	void shouldIgnoreStackId() {
+		Distro distro = Distro.fromImage(image(Map.of("io.buildpacks.stack.id", "io.buildpacks.stacks.resolute")));
+		Distro other = Distro.fromImage(image(Map.of("io.buildpacks.stack.id", "io.buildpacks.stacks.resolute.tiny")));
+		assertThat(distro.matches(other)).isTrue();
+	}
+
+	private Image image(Map<String, String> labels) {
+		Image image = mock(Image.class);
+		ImageConfig imageConfig = mock(ImageConfig.class);
+		given(image.getConfig()).willReturn(imageConfig);
+		given(imageConfig.getLabels()).willReturn(labels);
+		return image;
+	}
+
+}
@@ -1,86 +0,0 @@
-/*
- * Copyright 2012-present 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.buildpack.platform.build;
-
-import java.util.Collections;
-
-import org.junit.jupiter.api.Test;
-
-import org.springframework.boot.buildpack.platform.docker.type.Image;
-import org.springframework.boot.buildpack.platform.docker.type.ImageConfig;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
-import static org.mockito.BDDMockito.given;
-import static org.mockito.Mockito.mock;
-
-/**
- * Tests for {@link StackId}.
- *
- * @author Phillip Webb
- */
-class StackIdTests {
-
-	@Test
-	@SuppressWarnings("NullAway") // Test null check
-	void fromImageWhenImageIsNullThrowsException() {
-		assertThatIllegalArgumentException().isThrownBy(() -> StackId.fromImage(null))
-			.withMessage("'image' must not be null");
-	}
-
-	@Test
-	void fromImageWhenLabelIsMissingHasNoId() {
-		Image image = mock(Image.class);
-		ImageConfig imageConfig = mock(ImageConfig.class);
-		given(image.getConfig()).willReturn(imageConfig);
-		StackId stackId = StackId.fromImage(image);
-		assertThat(stackId.hasId()).isFalse();
-	}
-
-	@Test
-	void fromImageCreatesStackId() {
-		Image image = mock(Image.class);
-		ImageConfig imageConfig = mock(ImageConfig.class);
-		given(image.getConfig()).willReturn(imageConfig);
-		given(imageConfig.getLabels()).willReturn(Collections.singletonMap("io.buildpacks.stack.id", "test"));
-		StackId stackId = StackId.fromImage(image);
-		assertThat(stackId).hasToString("test");
-		assertThat(stackId.hasId()).isTrue();
-	}
-
-	@Test
-	void ofCreatesStackId() {
-		StackId stackId = StackId.of("test");
-		assertThat(stackId).hasToString("test");
-	}
-
-	@Test
-	void equalsAndHashCode() {
-		StackId s1 = StackId.of("a");
-		StackId s2 = StackId.of("a");
-		StackId s3 = StackId.of("b");
-		assertThat(s1).hasSameHashCodeAs(s2);
-		assertThat(s1).isEqualTo(s1).isEqualTo(s2).isNotEqualTo(s3);
-	}
-
-	@Test
-	void toStringReturnsValue() {
-		StackId stackId = StackId.of("test");
-		assertThat(stackId).hasToString("test");
-	}
-
-}
@@ -0,0 +1,101 @@
+{
+	"Id": "sha256:1332879bc8e38793a45ebe5a750f2a1c35df07ec2aa9c18f694644a9de77359b",
+	"RepoTags": [
+		"cloudfoundry/run:base-cnb"
+	],
+	"RepoDigests": [
+		"cloudfoundry/run@sha256:fb5ecb90a42b2067a859aab23fc1f5e9d9c2589d07ba285608879e7baa415aad"
+	],
+	"Parent": "",
+	"Comment": "",
+	"Created": "2020-03-20T20:18:18.117972538Z",
+	"Container": "91d1af87c3bb6163cd9c7cb21e6891cd25f5fa3c7417779047776e288c0bc234",
+	"ContainerConfig": {
+		"Hostname": "91d1af87c3bb",
+		"Domainname": "",
+		"User": "1000:1000",
+		"AttachStdin": false,
+		"AttachStdout": false,
+		"AttachStderr": false,
+		"Tty": false,
+		"OpenStdin": false,
+		"StdinOnce": false,
+		"Env": [
+			"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+		],
+		"Cmd": [
+			"/bin/sh",
+			"-c",
+			"#(nop) ",
+			"LABEL io.buildpacks.stack.id=io.buildpacks.stacks.bionic"
+		],
+		"ArgsEscaped": true,
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