Dockerfile.rhel8

# This image provides a Python 3.9 environment you can use to run your Python
# applications.
FROM ubi8/s2i-base:1

EXPOSE 8080

ENV PYTHON_VERSION=3.9 \
    PATH=$HOME/.local/bin/:$PATH \
    PYTHONUNBUFFERED=1 \
    PYTHONIOENCODING=UTF-8 \
    LC_ALL=en_US.UTF-8 \
    LANG=en_US.UTF-8 \
    CNB_STACK_ID=com.redhat.stacks.ubi8-python-39 \
    CNB_USER_ID=1001 \
    CNB_GROUP_ID=0 \
    PIP_NO_CACHE_DIR=off

ENV SUMMARY="Platform for building and running Python $PYTHON_VERSION applications" \
    DESCRIPTION="Python $PYTHON_VERSION available as container is a base platform for \
building and running various Python $PYTHON_VERSION applications and frameworks. \
Python is an easy to learn, powerful programming language. It has efficient high-level \
data structures and a simple but effective approach to object-oriented programming. \
Python's elegant syntax and dynamic typing, together with its interpreted nature, \
make it an ideal language for scripting and rapid application development in many areas \
on most platforms."

LABEL summary="$SUMMARY" \
      description="$DESCRIPTION" \
      io.k8s.description="$DESCRIPTION" \
      io.k8s.display-name="Python 3.9" \
      io.openshift.expose-services="8080:http" \
      io.openshift.tags="builder,python,python39,python-39,rh-python39" \
      com.redhat.component="python-39-container" \
      name="ubi8/python-39" \
      version="1" \
      usage="s2i build https://github.com/sclorg/s2i-python-container.git --context-dir=3.9/test/setup-test-app/ ubi8/python-39 python-sample-app" \
      com.redhat.license_terms="https://www.redhat.com/en/about/red-hat-end-user-license-agreements#UBI" \
      io.buildpacks.stack.id="com.redhat.stacks.ubi8-python-39" \
      maintainer="SoftwareCollections.org <sclorg@redhat.com>"

RUN INSTALL_PKGS="python39 python39-devel python39-setuptools python39-pip nss_wrapper-libs \
        httpd httpd-devel mod_ssl mod_auth_gssapi mod_ldap \
        mod_session atlas-devel gcc-gfortran libffi-devel libtool-ltdl \
        enchant krb5-devel" && \
    yum -y module enable python39:3.9 httpd:2.4 && \
    yum -y --setopt=tsflags=nodocs install $INSTALL_PKGS && \
    rpm -V $INSTALL_PKGS && \
    # Remove redhat-logos-httpd (httpd dependency) to keep image size smaller.
    rpm -e --nodeps redhat-logos-httpd && \
    yum -y clean all --enablerepo='*'

# Copy the S2I scripts from the specific language image to $STI_SCRIPTS_PATH.
COPY 3.9/s2i/bin/ $STI_SCRIPTS_PATH

# Copy extra files to the image.
COPY 3.9/root/ /

# Python 3.7+ only
# Yes, the directory below is already copied by the previous command.
# The problem here is that the wheels directory is copied as a symlink.
# Only if you specify symlink directly as a source, COPY copies all the
# files from the symlink destination.
COPY 3.9/root/opt/wheels /opt/wheels
# - Create a Python virtual environment for use by any application to avoid
#   potential conflicts with Python packages preinstalled in the main Python
#   installation.
# - In order to drop the root user, we have to make some directories world
#   writable as OpenShift default security model is to run the container
#   under random UID.
RUN \
    python3.9 -m venv ${APP_ROOT} && \
    # Python 3.7+ only code, Python <3.7 installs pip from PyPI in the assemble script. \
    # We have to upgrade pip to a newer verison because \
    # pip < 19.3 does not support manylinux2014 wheels. Only manylinux2014 (and later) wheels \
    #   support platforms like ppc64le, aarch64 or armv7 \
    # We are newly using wheel from one of the latest stable Fedora releases (from RPM python-pip-wheel) \
    # because it's tested better then whatever version from PyPI and contains useful patches. \
    # We have to do it here (in the macro) so the permissions are correctly fixed and pip is able \
    # to reinstall itself in the next build phases in the assemble script if user wants the latest version \
    ${APP_ROOT}/bin/pip install /opt/wheels/pip-* && \
    rm -r /opt/wheels && \
    chown -R 1001:0 ${APP_ROOT} && \
    fix-permissions ${APP_ROOT} -P && \
    rpm-file-permissions && \
    # The following echo adds the unset command for the variables set below to the \
    # venv activation script. This is inspired from scl_enable script and prevents \
    # the virtual environment to be activated multiple times and also every time \
    # the prompt is rendered. \
    echo "unset BASH_ENV PROMPT_COMMAND ENV" >> ${APP_ROOT}/bin/activate

# For RHEL/Centos 8+ scl_enable isn't sourced automatically in s2i-core
# so virtualenv needs to be activated this way
ENV BASH_ENV="${APP_ROOT}/bin/activate" \
    ENV="${APP_ROOT}/bin/activate" \
    PROMPT_COMMAND=". ${APP_ROOT}/bin/activate"

USER 1001

# Set the default CMD to print the usage of the language image.
CMD $STI_SCRIPTS_PATH/usage