Issue 96: Alpine Docker Image to support ML library packages

host/2.0/alpine/amd64/samples/Dockerfile.dotnet-python

@@ -0,0 +1,45 @@
+FROM mcr.microsoft.com/azure-functions/base:2.0 as runtime-image
+
+# From a dotnet alpine image...
+FROM microsoft/dotnet:2.2-aspnetcore-runtime-alpine
+
+# Copy Azure Functions Host .NET Dependencies
+COPY --from=runtime-image ["/azure-functions-host", "/azure-functions-host"]
+
+# Install Python dependencies
+ENV PYENV_ROOT=/root/.pyenv \
+    PATH=/root/.pyenv/shims:/root/.pyenv/bin:$PATH \
+    ASPNETCORE_URLS=http://+:80 \
+    DOTNET_RUNNING_IN_CONTAINER=true \
+    AzureWebJobsScriptRoot=/home/site/wwwroot \
+    HOME=/home \
+    FUNCTIONS_WORKER_RUNTIME=python \
+    DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=true
+
+# install python and your stuff here.
+# libc6-compat needs to be installed https://github.com/grpc/grpc/issues/15605#issuecomment-393974529
+RUN apk update && apk add --no-cache python3-dev gcc bash libc6-compat libnsl && \
+    ln -s /usr/lib/libnsl.so.2 /usr/lib/libnsl.so.1
+RUN apk add --no-cache --virtual build-dependencies \
+        build-base
+ENV WORKER_TAG=1.0.0a6 \
+    AZURE_FUNCTIONS_PACKAGE_VERSION=1.0.0a5 \
+    LANG=C.UTF-8 \
+    PYTHON_VERSION=3.6.8 \
+    PYTHON_PIP_VERSION=19.0 \
+    ACCEPT_EULA=Y \
+    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+RUN wget https://github.com/Azure/azure-functions-python-worker/archive/$WORKER_TAG.tar.gz && \
+    tar xvzf $WORKER_TAG.tar.gz && \
+    mv azure-functions-python-worker-* azure-functions-python-worker && \
+    cp -R /azure-functions-python-worker/python /azure-functions-host/workers/python && \
+    rm -rf $WORKER_TAG.tar.gz /azure-functions-python-worker && \
+    pip3 install azure-functions==$AZURE_FUNCTIONS_PACKAGE_VERSION azure-functions-worker==$WORKER_TAG && \
+    pip3 install numpy
+
+COPY ./python-context/start.sh ./python-context/worker.config.json /azure-functions-host/workers/python/
+RUN chmod +x /azure-functions-host/workers/python/start.sh
+
+# Symlink python to python3
+RUN ln -s /usr/bin/python3 /usr/bin/python
+CMD [ "dotnet", "/azure-functions-host/Microsoft.Azure.WebJobs.Script.WebHost.dll" ]

host/2.0/alpine/amd64/samples/Dockerfile.python-dotnet

@@ -0,0 +1,85 @@
+# Stage 1
+FROM mcr.microsoft.com/azure-functions/base:2.0 as runtime-image
+
+# Stage 2: Build Wheels
+FROM python:3.6-alpine as python-image
+COPY --from=runtime-image ["/azure-functions-host", "/azure-functions-host"]
+RUN mkdir /tmp/wheels && \ 
+    apk add --update --no-cache gcc bash libc6-compat && \
+    apk add --no-cache --virtual build-dependencies build-base && \
+    pip3 install wheel
+ENV WORKER_TAG=1.0.0a6 \
+    AZURE_FUNCTIONS_PACKAGE_VERSION=1.0.0a5 \
+    LANG=C.UTF-8 \
+    PYTHON_VERSION=3.6.6 \
+    PYTHON_PIP_VERSION=18.0 \
+    ACCEPT_EULA=Y \
+    PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+RUN wget https://github.com/Azure/azure-functions-python-worker/archive/$WORKER_TAG.tar.gz && \
+    tar xvzf $WORKER_TAG.tar.gz && \
+    mv azure-functions-python-worker-* azure-functions-python-worker && \
+    cp -R /azure-functions-python-worker/python /azure-functions-host/workers/python
+
+# Install as wheels and install any ML libraries as wheels    
+RUN pip3 wheel --wheel-dir=/tmp/wheels azure-functions==$AZURE_FUNCTIONS_PACKAGE_VERSION azure-functions-worker==$WORKER_TAG numpy
+#RUN pip3 wheel -r /home/site/wwwroot/requirements.txt --wheel-dir=/tmp/wheels
+
+# Stage 3
+FROM python:3.6-alpine
+COPY --from=runtime-image ["/azure-functions-host", "/azure-functions-host"]
+RUN mkdir /tmp/wheels
+COPY --from=python-image /tmp/wheels /tmp/wheels
+
+# Install libpng-dev freetype-dev openblas-dev to get scipy pandas to run properly.
+RUN apk add --no-cache libc6-compat make automake gcc subversion python3-dev && \
+    pip3 install --no-index --find-links=/tmp/wheels azure-functions azure-functions-worker grpcio grpcio-tools protobuf setuptools six numpy && \
+    rm -r /tmp/wheels
+
+# Install aspnetcore dotnet core 2.2
+RUN apk add --no-cache \
+        ca-certificates \
+        \
+        # .NET Core dependencies
+        krb5-libs \
+        libgcc \
+        libintl \
+        libssl1.0 \
+        libstdc++ \
+        tzdata \
+        userspace-rcu \
+        zlib \
+    && apk -X https://dl-cdn.alpinelinux.org/alpine/edge/main add --no-cache \
+        lttng-ust
+
+ARG REPO=microsoft/dotnet
+# Configure web servers to bind to port 80 when present
+ENV ASPNETCORE_URLS=http://+:80 \
+    # Enable detection of running in a container
+    DOTNET_RUNNING_IN_CONTAINER=true \
+    # Set the invariant mode since icu_libs isn't included (see https://github.com/dotnet/announcements/issues/20)
+    DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=true
+
+# Install ASP.NET Core
+ENV ASPNETCORE_VERSION 2.2.2
+
+RUN apk add --no-cache --virtual .build-deps \
+        openssl \
+    && wget -O aspnetcore.tar.gz https://dotnetcli.blob.core.windows.net/dotnet/aspnetcore/Runtime/$ASPNETCORE_VERSION/aspnetcore-runtime-$ASPNETCORE_VERSION-linux-musl-x64.tar.gz \
+    && aspnetcore_sha512='59e2e0eb092d90ba53814c74259f59dcb8aa11b409b908e849aa0d851ec6cef7d1616e02c23d37e84901ca92fd9a6eb05c522ef8668da1fa6a518211532b41ab' \
+    && echo "$aspnetcore_sha512  aspnetcore.tar.gz" | sha512sum -c - \
+    && mkdir -p /usr/share/dotnet \
+    && tar -zxf aspnetcore.tar.gz -C /usr/share/dotnet \
+    && rm aspnetcore.tar.gz \
+    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
+    && apk del .build-deps
+
+ENV AzureWebJobsScriptRoot=/home/site/wwwroot
+
+# Start functions host
+CMD [ "dotnet", "/azure-functions-host/Microsoft.Azure.WebJobs.Script.WebHost.dll" ]
+
+# Start python worker
+COPY ./python-context/start.sh /azure-functions-host/workers/python/
+RUN chmod +x /azure-functions-host/workers/python/start.sh
+COPY ./python-context/worker.config.json /azure-functions-host/workers/python/
+ENV workers:python:path /azure-functions-host/workers/python/start.sh

host/2.0/alpine/amd64/samples/python-context/start.sh

@@ -0,0 +1,74 @@
+#! /bin/bash
+
+# Directory name for start.sh
+DIR="$(dirname $0)"
+
+export PYTHONPATH=/root/.pyenv/versions/3.6.6/lib/python3.6:/root/.pyenv/versions/3.6.6/lib/python3.6/site-packages:$PYTHONPATH
+
+# If we're not in a virtual environment, check if either:
+#   $AZURE_FUNCTIONS_VIRTUAL_ENVIRONMENT is set, use it for venv
+#   if it's not set and there is a default venv, activate it
+#   else use the container python
+if [ -z "$VIRTUAL_ENV"]
+then
+    # Determining the virtual environment entry point
+    if [ -z "$AZURE_FUNCTIONS_VIRTUAL_ENVIRONMENT" ]
+    then
+        echo "using system python"
+    else
+        echo "activating virtual environment"
+        source $AZURE_FUNCTIONS_VIRTUAL_ENVIRONMENT
+    fi
+fi
+if [ -z "$SKIP_PYTHONPATH_UPDATE" ]
+then
+    CUSTOM_PACKAGES="$HOME/site/wwwroot/.python_packages/lib/python3.7/site-packages"
+    if [ -d "$CUSTOM_PACKAGES" ]
+    then
+        echo "appending $CUSTOM_PACKAGES to PYTHONPATH"
+        export PYTHONPATH=$PYTHONPATH:$CUSTOM_PACKAGES
+    else
+        echo "path $CUSTOM_PACKAGES doesn't exist"
+    fi
+
+    CUSTOM_VENV_PACKAGES="$HOME/site/wwwroot/worker_venv/lib/python3.7/site-packages"
+    if [ -d "$CUSTOM_VENV_PACKAGES" ]
+    then
+        echo "appending $CUSTOM_VENV_PACKAGES to PYTHONPATH"
+        export PYTHONPATH=$PYTHONPATH:$CUSTOM_VENV_PACKAGES
+    else
+        echo "path $CUSTOM_VENV_PACKAGES doesn't exist"
+    fi
+
+    CUSTOM_PACKAGES="$HOME/site/wwwroot/.python_packages/lib/python3.6/site-packages"
+    if [ -d "$CUSTOM_PACKAGES" ]
+    then
+        echo "appending $CUSTOM_PACKAGES to PYTHONPATH"
+        export PYTHONPATH=$PYTHONPATH:$CUSTOM_PACKAGES
+    else
+        echo "path $CUSTOM_PACKAGES doesn't exist"
+    fi
+
+    CUSTOM_VENV_PACKAGES="$HOME/site/wwwroot/worker_venv/lib/python3.6/site-packages"
+    if [ -d "$CUSTOM_VENV_PACKAGES" ]
+    then
+        echo "appending $CUSTOM_VENV_PACKAGES to PYTHONPATH"
+        export PYTHONPATH=$PYTHONPATH:$CUSTOM_VENV_PACKAGES
+    else
+        echo "path $CUSTOM_VENV_PACKAGES doesn't exist"
+    fi
+else
+    echo "SKIP_PYTHONPATH_UPDATE == $SKIP_PYTHONPATH_UPDATE"
+fi
+
+echo "python == $(which python)"
+echo "PYTHONPATH == $PYTHONPATH"
+
+echo "starting the python worker"
+if [ -f $HOME/site/wwwroot/worker-bundle/worker-bundle ]
+then
+    chmod +x $HOME/site/wwwroot/worker-bundle/worker-bundle
+    $HOME/site/wwwroot/worker-bundle/worker-bundle $@
+else
+    python $DIR/worker.py $@
+fi

host/2.0/alpine/amd64/samples/python-context/worker.config.json

@@ -0,0 +1,8 @@
+{
+    "description":{
+        "language":"python",
+        "extensions":[".py"],
+        "defaultExecutablePath":"bash",
+        "defaultWorkerPath":"start.sh"
+    }
+}