[yocto] Writing a functional Dockerfile to run a container with a package revision (PR) server

[Iván Castell]

I found the right way to fix my issue. First I wrote this script:

    $ cat start.sh
    #! /bin/sh

    cd /home/yocto/poky
    source ./oe-init-build-env ../build
    bitbake-prserv --start --file /home/yocto/prserv/sqlite3.db --log
/tmp/prserv.log --port 8585
    tail -f /tmp/prserv.log

And after modified the Dockerfile adding this stuff:

    ADD start.sh /home/yocto/start.sh
    RUN chmod 755 /home/yocto/start.sh
    RUN chown yocto.yocto /home/yocto/start.sh
    ...
    CMD /home/yocto/start.sh

Now it works as expected. Hope this helps somebody else!



2018-05-04 15:57 GMT+02:00 Iván Castell <icastell at nayarsystems.com>:

> The purpose is deploying a yocto PR server using a docker container. More
> info about PR server can be found in the following link: https://wiki.
> yoctoproject.org/wiki/PR_Service
>
> To try doing that I wrote this "Dockerfile" to generate a docker image:
>
> FROM ubuntu:16.04
> MAINTAINER Yocto <yocto at mydomain.com>
>
> # Update, upgrade and install
> RUN apt-get update
> RUN apt-get upgrade -y
> RUN apt-get install -y gawk wget git git-core diffstat unzip texinfo
> gcc-multilib build-essential chrpath socat xterm curl parted python python3
> python3-pip python3-pexpect xz-utils debianutils iputils-ping libsdl1.2-dev
> net-tools
>
> # Set up locales
> RUN apt-get -y install locales apt-utils sudo && dpkg-reconfigure locales
> && locale-gen en_US.UTF-8 && update-locale LC_ALL=en_US.UTF-8
> LANG=en_US.UTF-8
> ENV LANG en_US.utf8
>
> # Clean up APT when done
> RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
>
> # Replace dash with bash
> RUN rm /bin/sh && ln -s bash /bin/sh
>
> # Yocto user management
> RUN groupadd -g 1000 yocto && useradd -u 1000 -g 1000 -ms /bin/bash yocto
> && usermod -a -G sudo yocto && usermod -a -G users yocto
> ENV HOME /home/yocto
> USER yocto
>
> # Download poky
> RUN git clone --branch rocko git://git.yoctoproject.org/poky
> /home/yocto/poky
>
> # Create some directories
> RUN mkdir -p /home/yocto/build /home/yocto/prserv
>
> # Make /home/yocto/poky the working directory
> WORKDIR /home/yocto/poky
>
> # Expose listen port
> EXPOSE 8585
>
> # Run PR-server
> CMD /bin/sh -c " \
>     source ./oe-init-build-env ../build \
>     && bitbake-prserv --start --file /home/yocto/prserv/sqlite3.db --log
> /tmp/prserv.log --port 8585 \
> "
> Using previous Dockerfile I build a docker image:
>
> $ docker build -t docker-prserver .
> [...]
> Successfully built 362f4599b1b6
> Successfully tagged docker-prserver:latest
>
> As you can see before, the process ends successfully. After that, I run a
> container:
>
> $ docker run -ti docker-prserver
> yocto at b3c9fd06d8af:~/poky$
>
> The previous command creates a shell. I check if the process
> “bitbake-prserver” is running:
>
> $ netstat -nat
> Active Internet connections (servers and established)
> Proto Recv-Q Send-Q Local Address           Foreign Address         State
>
> As you can see, the “bitbake-prserver” process is not running (no listen
> port). However, if I log into the container and execute the CMD command:
>
> yocto at b3c9fd06d8af:~/poky/build$ source ./oe-init-build-env ../build/ &&
> bitbake-prserv --start --file /home/yocto/prserv/sqlite3.db --log
> /tmp/prserv.log --port 8585
>
> Then it works fine:
>
> yocto at b3c9fd06d8af:~$ netstat -nat
> Active Internet connections (servers and established)
> Proto Recv-Q Send-Q Local Address           Foreign Address    State
> tcp        0      0 0.0.0.0:8585            0.0.0.0:*          LISTEN
>
> It’s supposed that CMD is executed when the container is instantiated, but
> this is not happening. What is the right way to write a Dockerfile to run a
> bitbake-prserv server listening on the exposed port?
>
> Hope some of you have some experience on this and can provide some useful
> feedback.
>
> Thanks a lot in advance! :)
>
>


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