Why does "docker run" error with "no such file or directory"? - bash

Question

I am trying to run a container which runs an automated build. Here is the dockerfile:
FROM ubuntu:14.04
MAINTAINER pmandayam
# update dpkg repositories
RUN apt-get update
# install wget
RUN apt-get install -y wget
# get maven 3.2.2
RUN wget --no-verbose -O /tmp/apache-maven-3.2.2.tar.gz http://archive.apache.or
g/dist/maven/maven-3/3.2.2/binaries/apache-maven-3.2.2-bin.tar.gz
# verify checksum
RUN echo "87e5cc81bc4ab9b83986b3e77e6b3095 /tmp/apache-maven-3.2.2.tar.gz" | md5
sum -c
# install maven
RUN tar xzf /tmp/apache-maven-3.2.2.tar.gz -C /opt/
RUN ln -s /opt/apache-maven-3.2.2 /opt/maven
RUN ln -s /opt/maven/bin/mvn /usr/local/bin
RUN rm -f /tmp/apache-maven-3.2.2.tar.gz
ENV MAVEN_HOME /opt/maven
# remove download archive files
RUN apt-get clean
# set shell variables for java installation
ENV java_version 1.8.0_11
ENV filename jdk-8u11-linux-x64.tar.gz
ENV downloadlink http://download.oracle.com/otn-pub/java/jdk/8u11-b12/$filename
# download java, accepting the license agreement
RUN wget --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie
" -O /tmp/$filename $downloadlink
# unpack java
RUN mkdir /opt/java-oracle && tar -zxf /tmp/$filename -C /opt/java-oracle/
ENV JAVA_HOME /opt/java-oracle/jdk$java_version
ENV PATH $JAVA_HOME/bin:$PATH
# configure symbolic links for the java and javac executables
RUN update-alternatives --install /usr/bin/java java $JAVA_HOME/bin/java 20000 &
& update-alternatives --install /usr/bin/javac javac $JAVA_HOME/bin/javac 20000
# install mongodb
RUN echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen
' | sudo tee /etc/apt/sources.list.d/mongodb.list && \
apt-get update && \
apt-get --allow-unauthenticated install -y mongodb-org mongodb-org-s
erver mongodb-org-shell mongodb-org-mongos mongodb-org-tools && \
echo "mongodb-org hold" | dpkg --set-selections && \
echo "mongodb-org-server hold" | dpkg --set-selections && \
echo "mongodb-org-shell hold" | dpkg --set-selections &&
\
echo "mongodb-org-mongos hold" | dpkg --set-selectio
ns && \
echo "mongodb-org-tools hold" | dpkg --set-selec
tions
RUN mkdir -p /data/db
VOLUME /data/db
EXPOSE 27017
COPY build-script /build-script
CMD ["/build-script"]
I can build the image successfully but when I try to run the container I get this error:
$ docker run mybuild
no such file or directory
Error response from daemon: Cannot start container 3e8aa828909afcd8fb82b5a5ac894
97a537bef2b930b71a5d20a1b98d6cc1dd6: [8] System error: no such file or directory
what does it mean 'no such file or directory'?
Here is my simple script:
#!/bin/bash
sudo service mongod start
mvn clean verify
sudo service mongod stop
I copy it like this: COPY build-script /build-script
and run it like this: CMD ["/build-script"] not sure why its not working

Answer 1

Using service isn't going to fly - the Docker base images are minimal and don't support this. If you want to run multiple processes, you can use supervisor or runit etc.
In this case, it would be simplest just to start mongo manually in the script e.g. /usr/bin/mongod & or whatever the correct incantation is.
BTW the lines where you try to clean up don't have much effect:
RUN rm -f /tmp/apache-maven-3.2.2.tar.gz
...
# remove download archive files
RUN apt-get clean
These files have already been committed to a previous image layer, so doing this doesn't save any disk-space. Instead you have to delete the files in the same Dockerfile instruction in which they're added.
Also, I would consider changing the base image to a Java one, which would save a lot of work. However, you may have trouble finding one which bundles the official Oracle JDK rather than OpenJDK if that's a problem.