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I am new to docker. I have a maven wrapper which build package my application and copy the deployables into new folder and then run it. I am getting this error.

COPY failed: stat /var/lib/docker/tmp/docker-builder102689450/app/q-runner/target/q-runner-0.0.1-runner.jar: no such file or directory

Why should the file searched in above location when I mentioned to copy from /app/.

My docker file is

 # docker build -f Dockerfile.build -t abc/notify-build . FROM adoptopenjdk/openjdk14:ubi WORKDIR /app COPY ./ /app RUN chmod +x ./mvnw && \ ./mvnw package ENV JAVA_OPTIONS=-Dquarkus.http.host=0.0.0.0 COPY /app/target/*-runner.jar /deployments/app.jar CMD java -jar /deployments/app.jar
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  • The location shown in your error message is the docker build context, i.e. the one that is created from your docker build <context> command. You cannot copy anything that is outside of the context. Any source starting with / in your copy command is searched from the context root. You cannot either navigate out the context by using something like ../../../app/ which will fire an error. Commented Sep 30, 2020 at 10:03
  • Thanks for the input. I spend sometime understanding the build context. I have resolved the problem now. Please check answer Commented Oct 1, 2020 at 1:44

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I have changed this into two stage build and solved it

#stage1 FROM adoptopenjdk/openjdk14:ubi as builder RUN mkdir build COPY . /build WORKDIR /build RUN chmod +x ./mvnw && \ ./mvnw package #stage2 FROM adoptopenjdk/openjdk14:ubi COPY --from=builder /build/q-runner/target/lib/* /deployments/lib/ COPY --from=builder /build/q-runner/target/*-runner.jar /deployments/app.jar ENV JAVA_OPTIONS=-Dquarkus.http.host=0.0.0.0 CMD java -jar /deployments/app.jar
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