Issue
I'm attempting to write the simplest docker file that will run a main class named InsertVolume in package scripts. Here is my Dockerfile :
FROM adoptopenjdk/openjdk11:latest
ENV MAVEN_VERSION 3.3.9
RUN mkdir -p /usr/share/maven \
&& curl -fsSL http://apache.osuosl.org/maven/maven-3/$MAVEN_VERSION/binaries/apache-maven-$MAVEN_VERSION-bin.tar.gz \
| tar -xzC /usr/share/maven --strip-components=1 \
&& ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
CMD "mvn compile exec:java -Dexec.mainClass=\"scripts.InsertVolume\""
Here is the result of running command
docker build -f Dockerfile -t test/insert .
:
[+] Building 0.8s (6/6) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 37B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/adoptopenjdk/openjdk11:latest 0.7s
=> [1/2] FROM docker.io/adoptopenjdk/openjdk11:latest@sha256:ec7b07fa180861542ae8af31fbdad43f2f133170b43d29204a4b89e8f56a4c6f 0.0s
=> CACHED [2/2] RUN mkdir -p /usr/share/maven && curl -fsSL http://apache.osuosl.org/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz | tar -xzC /usr/share/maven --strip-components=1 && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn 0.0s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:22b094dc17fc3e41b7db6cea72819e5fef1edff6dedf4c291345546fb4f53019 0.0s
=> => naming to docker.io/test/insert 0.0s
Use 'docker scan' to run Snyk tests against images to find vulnerabilities and learn how to fix them
When I then attempt to run the image using :
docker run test/insert
I receive error :
docker: Error response from daemon: OCI runtime create failed: container_linux.go:367: starting container process caused: exec: "mvn compile exec:java -Dexec.mainClass=\"scripts.InsertVolume\"": executable file not found in $PATH: unknown.
The mvn command mvn compile exec:java -Dexec.mainClass="scripts.InsertVolume" runs successfully when I execute against the project (not using docker).
How to modify the Dockerfile so that it compiles and executed the class scripts.InsertVolume ?
Using mvn compile within the Dockerfile should enable the main class to be run ?
Update :
After some debugging I got this to work with following Dockerfile :
FROM adoptopenjdk/openjdk11:latest
ENV MAVEN_VERSION 3.3.9
RUN mkdir -p /usr/share/maven \
&& curl -fsSL http://apache.osuosl.org/maven/maven-3/$MAVEN_VERSION/binaries/apache-maven-$MAVEN_VERSION-bin.tar.gz \
| tar -xzC /usr/share/maven --strip-components=1 \
&& ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
COPY pom.xml /build/
COPY src /build/src/
WORKDIR /build/
RUN mvn clean package
ENTRYPOINT ["java", "-jar", "target/test-1.0-SNAPSHOT.jar"]
# docker build -f Dockerfile -t test/insert .
# docker run -it --rm test/insert
The crux of the update is copying the project src and building using commands :
COPY pom.xml /build/
COPY src /build/src/
WORKDIR /build/
RUN mvn clean package
Solution
Check first if tar -xzC /usr/share/maven --strip-components=1 did what you thought it should.
In other words, in your Dockerfile, add for testing a RUN ls -alrth /usr/bin/mvn et RUN find /usr/share/maven/ to double-check the symlink /usr/bin/mvn actually reference an existing /usr/share/maven/bin/mvn file.
You can also do the same with a docker run -it --rm test/insert bash.
Answered By - VonC
Answer Checked By - Mildred Charles (JavaFixing Admin)
