[Bug]: Unable to build from a Dockerfile loaded from the classpath of a Jar.

Module

Core

Testcontainers version

1.20.2

Using the latest Testcontainers version?

Yes

Host OS

Linux

Host Arch

x86

Docker version

[jamesm@wt1devps05 solana4j]$ docker --version
Docker version 26.1.4, build 5650f9b

What happened?

Unable to build from a Dockerfile read from a Jar.

In fact, loading files from the classpath from jars in general looks a bit broken to me. I raised an issue a few days ago that became unwieldy, so I tried to recreate the issue in as simple a way as possible. That previous issue I closed.

I have created a unit test that proves the problem. Just apply the patch in the "Additional Information" section.

Question I have simply is am I doing something wrong, or is this indeed a bug, or is this simply not supported? It certainly looks like the code is trying quite hard to support what I'm trying to do.

I'd be happy to devote some time to raise a PR if you agree that this is not expected behaviour.

Thanks.

Relevant log output

Caused by: com.github.dockerjava.api.exception.DockerClientException: Failed to read build context directory: /tmp
at org.testcontainers.shaded.com.github.dockerjava.core.dockerfile.Dockerfile$ScannedResult.addFilesInDirectory(Dockerfile.java:201)
at org.testcontainers.shaded.com.github.dockerjava.core.dockerfile.Dockerfile$ScannedResult.addFilesInDirectory(Dockerfile.java:207)
at org.testcontainers.shaded.com.github.dockerjava.core.dockerfile.Dockerfile$ScannedResult.(Dockerfile.java:186)
at org.testcontainers.shaded.com.github.dockerjava.core.dockerfile.Dockerfile.parse(Dockerfile.java:111)
at org.testcontainers.shaded.com.github.dockerjava.core.command.BuildImageCmdImpl.withDockerfile(BuildImageCmdImpl.java:344)
at org.testcontainers.shaded.com.github.dockerjava.core.command.BuildImageCmdImpl.withDockerfile(BuildImageCmdImpl.java:22)
at org.testcontainers.images.builder.ImageFromDockerfile.lambda$configure$0(ImageFromDockerfile.java:177)
at java.base/java.util.Optional.ifPresent(Optional.java:178)
at org.testcontainers.images.builder.ImageFromDockerfile.configure(ImageFromDockerfile.java:176)
at org.testcontainers.images.builder.ImageFromDockerfile.resolve(ImageFromDockerfile.java:124)
at org.testcontainers.images.builder.ImageFromDockerfile.resolve(ImageFromDockerfile.java:43)
at org.testcontainers.utility.LazyFuture.getResolvedValue(LazyFuture.java:20)
at org.testcontainers.utility.LazyFuture.get(LazyFuture.java:41)
at org.testcontainers.shaded.com.google.common.util.concurrent.Futures$1.get(Futures.java:538)
at org.testcontainers.images.RemoteDockerImage.getImageName(RemoteDockerImage.java:172)
at org.testcontainers.images.RemoteDockerImage.resolve(RemoteDockerImage.java:76)
at org.testcontainers.images.RemoteDockerImage.resolve(RemoteDockerImage.java:35)
at org.testcontainers.utility.LazyFuture.getResolvedValue(LazyFuture.java:20)
at org.testcontainers.utility.LazyFuture.get(LazyFuture.java:41)
at org.testcontainers.containers.GenericContainer.getDockerImageName(GenericContainer.java:1354)
... 54 more

Failed to read build context directory: /tmp
com.github.dockerjava.api.exception.DockerClientException: Failed to read build context directory: /tmp
at app//org.testcontainers.shaded.com.github.dockerjava.core.dockerfile.Dockerfile$ScannedResult.addFilesInDirectory(Dockerfile.java:201)
at app//org.testcontainers.shaded.com.github.dockerjava.core.dockerfile.Dockerfile$ScannedResult.addFilesInDirectory(Dockerfile.java:207)
at app//org.testcontainers.shaded.com.github.dockerjava.core.dockerfile.Dockerfile$ScannedResult.(Dockerfile.java:186)
at app//org.testcontainers.shaded.com.github.dockerjava.core.dockerfile.Dockerfile.parse(Dockerfile.java:111)
at app//org.testcontainers.shaded.com.github.dockerjava.core.command.BuildImageCmdImpl.withDockerfile(BuildImageCmdImpl.java:344)
at app//org.testcontainers.shaded.com.github.dockerjava.core.command.BuildImageCmdImpl.withDockerfile(BuildImageCmdImpl.java:22)
at app//org.testcontainers.images.builder.ImageFromDockerfile.lambda$configure$0(ImageFromDockerfile.java:177)
at java.base@17.0.11/java.util.Optional.ifPresent(Optional.java:178)
at app//org.testcontainers.images.builder.ImageFromDockerfile.configure(ImageFromDockerfile.java:176)
at app//org.testcontainers.images.builder.ImageFromDockerfile.resolve(ImageFromDockerfile.java:124)
at app//org.testcontainers.images.builder.ImageFromDockerfile.resolve(ImageFromDockerfile.java:43)
at app//org.testcontainers.utility.LazyFuture.getResolvedValue(LazyFuture.java:20)
at app//org.testcontainers.utility.LazyFuture.get(LazyFuture.java:41)
at app//org.testcontainers.shaded.com.google.common.util.concurrent.Futures$1.get(Futures.java:538)
at app//org.testcontainers.images.RemoteDockerImage.getImageName(RemoteDockerImage.java:172)
at app//org.testcontainers.images.RemoteDockerImage.resolve(RemoteDockerImage.java:76)
at app//org.testcontainers.images.RemoteDockerImage.resolve(RemoteDockerImage.java:35)
at app//org.testcontainers.utility.LazyFuture.getResolvedValue(LazyFuture.java:20)
at app//org.testcontainers.utility.LazyFuture.get(LazyFuture.java:41)
at app//org.testcontainers.containers.GenericContainer.getDockerImageName(GenericContainer.java:1354)
at app//org.testcontainers.containers.GenericContainer.doStart(GenericContainer.java:351)
at app//org.testcontainers.containers.GenericContainer.start(GenericContainer.java:322)
at app//org.testcontainers.images.builder.DockerfileBuildTest.performTest(DockerfileBuildTest.java:96)
at java.base@17.0.11/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base@17.0.11/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base@17.0.11/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base@17.0.11/java.lang.reflect.Method.invoke(Method.java:568)
at app//org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
at app//org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at app//org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at app//org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at app//org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at app//org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
at app//org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
at app//org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
at app//org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
at app//org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at app//org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at app//org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at app//org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at app//org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at app//org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at app//org.junit.runners.Suite.runChild(Suite.java:128)
at app//org.junit.runners.Suite.runChild(Suite.java:27)
at app//org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at app//org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at app//org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at app//org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at app//org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at app//org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at app//org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:112)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:40)
at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:60)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:52)
at java.base@17.0.11/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base@17.0.11/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base@17.0.11/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base@17.0.11/java.lang.reflect.Method.invoke(Method.java:568)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at jdk.proxy1/jdk.proxy1.$Proxy2.processTestClass(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)

Additional Information

Index: core/src/test/java/org/testcontainers/images/builder/DockerfileBuildTest.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/core/src/test/java/org/testcontainers/images/builder/DockerfileBuildTest.java b/core/src/test/java/org/testcontainers/images/builder/DockerfileBuildTest.java
--- a/core/src/test/java/org/testcontainers/images/builder/DockerfileBuildTest.java	(revision cd29df97aa06e744ed4d8c17ca33b7983ef7f338)
+++ b/core/src/test/java/org/testcontainers/images/builder/DockerfileBuildTest.java	(date 1729547678601)
@@ -5,6 +5,7 @@
 import org.junit.runners.Parameterized;
 import org.testcontainers.containers.GenericContainer;
 import org.testcontainers.containers.startupcheck.OneShotStartupCheckStrategy;
+import org.testcontainers.utility.MountableFile;
 
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -70,6 +71,13 @@
                     .withFileFromPath(".", RESOURCE_PATH)
                     .withDockerfile(RESOURCE_PATH.resolve("Dockerfile-alt")),
             },
+            // Dockerfile build using dockerfile from resources
+            new Object[]{
+                "test4567",
+                new ImageFromDockerfile().withDockerfile(
+                        Paths.get(MountableFile.forClasspathResource("/recursive/Dockerfile").getFilesystemPath())
+                    ),
+            },
         };
     }
 
Index: core/testlib/recursive/Dockerfile
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/core/testlib/recursive/Dockerfile b/core/testlib/recursive/Dockerfile
new file mode 100644
--- /dev/null	(date 1729547092581)
+++ b/core/testlib/recursive/Dockerfile	(date 1729547092581)
@@ -0,0 +1,1 @@
+FROM postgres

Run core/testlib/create_fakejar.sh and then run the test in the above patch, should replicate the issue.

Inizia con core/src/test/java/org/testcontainers/images/builder/DockerfileBuildTest.java e con la chiamata a MountableFile.forClasspathResource mostrata nel report. Esegui il test di build del Dockerfile utilizzando la risorsa del classpath pacchettizzata in un Jar, quindi conferma che il contesto di build venga letto correttamente senza l’errore segnalato.