Dockerfile for building example application

[aldas]

It would be cool if there would be Dockerfile(s) in repo instead/in addition to Docker image binaries from website. With file like that you have good base for building your own application images for FastDDS.

Currently I have made something like that for HelloWorldPublisher/Subscriber. Image size comes is 181MB.

Dockerfile

ARG  BUILDER_IMAGE=python:3.12-slim-bookworm
###############################################
# STEP 1 build FastDDS python library and generate code from project IDL files
###############################################
FROM ${BUILDER_IMAGE} as builder

ARG fastdds_version=1.4.1
ENV fastdds_version=${fastdds_version}

RUN apt update &&  \
    apt install -y --no-install-recommends \
        git \
        cmake \
        build-essential \
        wget \
        libasio-dev \
        libtinyxml2-dev \
        swig \
        libpython3-dev \
        openjdk-17-jdk

# Install `colcon` and `vcs`
RUN pip install -U colcon-common-extensions vcstool

RUN mkdir -p /fastdds_python_ws/src && \
    cd /fastdds_python_ws && \
    wget "https://raw.githubusercontent.com/eProsima/Fast-DDS-python/v${fastdds_version}/fastdds_python.repos" && \
    vcs import src < fastdds_python.repos

# Build python library
RUN cd /fastdds_python_ws && \
    colcon build

# Create fastddsgen jar file to be able to generate code from IDL files
RUN cd /fastdds_python_ws/src/fastddsgen/ && \
    ./gradlew assemble

WORKDIR /project
COPY . .

# Generate code from IDL files using fastddsgen
RUN cd /project && \
    . /fastdds_python_ws/install/setup.sh && \
    /usr/bin/java -jar /fastdds_python_ws/src/fastddsgen/share/fastddsgen/java/fastddsgen.jar \
      -python HelloWorld.idl && \
    cmake . && \
    make

#########################
# STEP 2 build the image
#########################
FROM python:3.12-slim-bookworm

ENV USER=appuser
ENV UID=10001

# Create appuser to run code as an unprivileged user.
RUN adduser \
    --disabled-password \
    --gecos "" \
    --home "/nonexistent" \
#    --shell "/sbin/nologin" \
    --no-create-home \
    --uid "${UID}" \
    "${USER}"

RUN apt update &&  \
    apt install -y --no-install-recommends \
        ca-certificates \
        tzdata \
        libtinyxml2-dev && \
    update-ca-certificates

# Import from builder.
COPY --from=builder /fastdds_python_ws/install /fastdds_python_ws/install
COPY --from=builder /project/entrypoint.sh /project/entrypoint.sh
COPY --from=builder /project /project

WORKDIR /project

# Use an unprivileged user to run the code.
USER ${USER}:${UID}


ENTRYPOINT ["/project/entrypoint.sh"]
CMD ["/project/HelloWorldSubscriber.py"]

and entrypoint.sh is

#!/usr/bin/env sh
set -e

DIR=$(dirname "$0")
cd "$DIR"

. /fastdds_python_ws/install/setup.sh
# `-u` disables python output buffering so output will be immediately visible from container
exec python3 -u "$@"

These files assume that you have following files in same folder

• HelloWorld.idl
• HelloWorldPublisher.py
• HelloWorldSubscriber.py
• DEFAULT_FASTRTPS_PROFILES.xml (in my case I want to try with udp only transport)

and I build Docker image for the application with

sudo docker build . -t fastdds-python-example

and run subscriber with:

sudo docker run --rm --network host fastdds-python-example

and publisher with:

sudo docker run --rm --network host fastdds-python-example /project/HelloWorldPublisher.py

or using docker IPC to use shared memory

sudo docker run --rm --ipc=shareable fastdds-python-example
sudo docker run --rm --ipc=container:$(sudo docker container ls -a --format "{{.Names}}" -f ancestor=fastdds-python-example) fastdds-python-example /project/HelloWorldPublisher.py

[JesusPoderoso]

Hello @aldas, thanks for your contribution!
I am moving to the Show and tell section for proper diffusion.