docker run error: Unable to access jarfile - docker

Question

Docker image is built but when I want to run it, it shows this error:
Error: Unable to access jarfile rest-service-1.0.jar
My OS is Ubuntu 18.04.1 LTS and I use docker build -t doc-service & docker run doc-service.
This is my Dockerfile:
FROM ubuntu:16.04
MAINTAINER Frederico Apostolo <frederico.apostolo#blockfactory.com> (#fapostolo)
RUN apt-get update && apt-get -y upgrade
RUN apt-get install -y software-properties-common python-software-properties language-pack-en-base
RUN add-apt-repository ppa:webupd8team/java
RUN apt-get update && apt-get update --fix-missing && apt-get -y --allow-downgrades --allow-remove-essential --allow-change-held-packages upgrade \
&& echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | /usr/bin/debconf-set-selections \
&& apt-get install -y --allow-downgrades --allow-remove-essential --allow-change-held-packages curl vim unzip wget oracle-java8-installer \
&& apt-get clean && rm -rf /var/cache/* /var/lib/apt/lists/*
ENV JAVA_HOME /usr/lib/jvm/java-8-oracle/
run java -version
run echo $JAVA_HOME
#use locate for debug
RUN apt-get update && apt-get install -y locate mlocate && updatedb
#LIBREOFFICE START
RUN apt-get update && apt-get update --fix-missing && apt-get install -y -q libreoffice \
libreoffice-writer ure libreoffice-java-common libreoffice-core libreoffice-common \
fonts-opensymbol hyphen-fr hyphen-de hyphen-en-us hyphen-it hyphen-ru fonts-dejavu \
fonts-dejavu-core fonts-dejavu-extra fonts-noto fonts-dustin fonts-f500 fonts-fanwood \
fonts-freefont-ttf fonts-liberation fonts-lmodern fonts-lyx fonts-sil-gentium \
fonts-texgyre fonts-tlwg-purisa
#LIBREOFFICE END
#font configuration
COPY 00-odt-template-renderer-fontconfig.conf /etc/fonts/conf.d
RUN mkdir /document-service /document-service/fonts /document-service/module /document-service/logs
# local settings
RUN echo "127.0.0.1 http://www.arbs.local http://arbs.local www.arbs.local arbs.local" >> /etc/hosts
# && mkdir /logs/ && echo "dummy" >> /logs/errors.log
#EXPOSE 2115
COPY document-service-java_with_user_arg.sh /
RUN chmod +x /document-service-java_with_user_arg.sh
RUN apt-get update && apt-get -y --no-install-recommends install \
ca-certificates \
curl
RUN gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4
RUN curl -o /usr/local/bin/gosu -SL "https://github.com/tianon/gosu/releases/download/1.4/gosu-$(dpkg --print-architecture)" \
&& curl -o /usr/local/bin/gosu.asc -SL "https://github.com/tianon/gosu/releases/download/1.4/gosu-$(dpkg --print-architecture).asc" \
&& gpg --verify /usr/local/bin/gosu.asc \
&& rm /usr/local/bin/gosu.asc \
&& chmod +x /usr/local/bin/gosu
ENV LANG="en_US.UTF-8"
# In case someone loses the Dockerfile
# Needs to be in the end so it doesn't invalidate unaltered cache whenever the file is updated.
RUN rm -rf /etc/Dockerfile
ADD Dockerfile /etc/Dockerfile
ENTRYPOINT ["/document-service-java_with_user_arg.sh"]
this is document-service-java_with_user_arg.sh:
#!/bin/bash
USER_ID=${LOCAL_USER_ID:-9001}
USER_NAME=${LOCAL_USER_NAME:-jetty}
echo "Starting user: $USER_NAME with UID : $USER_ID"
useradd --shell /bin/bash --home-dir /document-service/dockerhome --non-unique --uid $USER_ID $USER_NAME
cd /document-service
/usr/local/bin/gosu $USER_NAME "$#" java -jar rest-service-1.0.jar
Can anyone help me on this?

Answer 1

Based on the comments, you must add the JAR when building the image by defining in your Dockerfile :
COPY rest-service-1.0.jar /document-service/rest-service-1.0.jar
You could also just use :
COPY rest-service-1.0.jar /rest-service-1.0.jar
, and remove cd /document-service in your entrypoint script, as on ubuntu:16.04 images, default working directory is /. My opinion is that setting the working directory in the script is safer, so you should just go for the first solution.
Note that you could also use ADD instead of COPY (as you already did in your Dockerfile), but here only COPY is necessary (read this post if you want more info : What is the difference between the `COPY` and `ADD` commands in a Dockerfile?).
Finally, I suggest you to add the COPY line at the end of your Dockerfile, so that if a new JAR is built, image won't be rebuilt from scratch but from an existing layer, speeding up build time.

Answer 2

it looking error about workdir
you must select workdir for this copy format
try WORKDIR /yourpath/