CODEWITHSUNDEEP
javadocker
belgoros
belgoros

Reputation: 3908

Docker can't find generated jar file

I can't figure out why Docker can't find the created jar file in the following Dockerfile:

FROM maven:latest

ENV APP_HOME=/app/

COPY pom.xml $APP_HOME
COPY src $APP_HOME/src/
WORKDIR $APP_HOME

RUN mvn package -DskipTests
ENV JAR_FILE=target/spring-boot-app-0.0.1-SNAPSHOT.jar

COPY ${JAR_FILE} /app.jar

EXPOSE 8300
ENTRYPOINT ["java", "-jar", "/app.jar"]

when building the image with: docker build -t spring-boot-app ., it fails with:

Step 9/11 : COPY ${JAR_FILE} /app.jar
COPY failed: stat /var/lib/docker/tmp/docker-builder834657272/target/spring-boot-app-0.0.1-SNAPSHOT.jar: no such file or directory

If I run mvn clean package before building the image, it works. If remove target folder as rm -rf target and rebuild the image, it fails.

What am I missing?

Upvotes: 1

Views: 4343

Answers (1)

tpschmidt
tpschmidt

Reputation: 2717

You're trying to copy your locally built jar file to the image, but most probably you just want to move the jar file you build inside the image to another path?

Just replace the COPY ${JAR_FILE} /app.jar with RUN mv ${JAR_FILE} /app.jar

Upvotes: 1

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