Container updates

.github/workflows/container.yml

@@ -0,0 +1,59 @@
+name: Container Images
+
+on:
+  push:
+    branches:
+      - 'master'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
+
+      - name: Calculate Container Metadata
+        id: meta
+        uses: crazy-max/ghaction-docker-meta@v1
+        with:
+          images: ghcr.io/${{ github.repository }}
+
+      - name: Setup QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Setup Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Cache Layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/buildx-cache
+          key: buildx-cache-${{ github.sha }}
+          restore-keys: |
+            buildx-cache-
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        if: github.event_name != 'pull_request'
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and Push Images
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64, linux/386, linux/arm64, linux/arm/v6, linux/arm/v7
+          cache-from: type=local,src=/tmp/buildx-cache
+          cache-to: type=local,dest=/tmp/buildx-cache-new,mode=max
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ghcr.io/${{ github.repository }}:latest
+          labels: ${{ steps.meta.outputs.labels }}
+
+      - name: Move Cache
+        run: |
+          rm -rf /tmp/buildx-cache
+          mv /tmp/buildx-cache-new /tmp/buildx-cache

Dockerfile

@@ -1,40 +1,39 @@
 # -------------------
 # The build container
 # -------------------
-FROM debian:buster-slim AS build
+FROM python:3.7-buster AS build
 
-# Update system packages and install build dependencies.
+# Upgrade base packages.
 RUN apt-get update && \
   apt-get upgrade -y && \
   apt-get install -y \
-  build-essential \
   cmake \
-  libglib2.0-dev \
+  libgdal-dev && \
-  python3 \
-  python3-dateutil \
-  python3-fastkml \
-  python3-flask \
-  python3-gdal \
-  python3-numpy \
-  python3-pip \
-  python3-requests \
-  python3-serial \
-  python3-setuptools \
-  python3-shapely \
-  unzip && \
   rm -rf /var/lib/apt/lists/*
 
-# Install additional Python packages that aren't available through apt-get.
+# Copy in requirements.txt.
-RUN pip3 --no-cache-dir install \
+COPY requirements.txt \
-  flask-socketio \
+  /root/chasemapper/requirements.txt
-  pytz
+
+# Install numpy Python package first so that it is available for gdal.
+RUN pip3 --no-cache-dir install --user --no-warn-script-location \
+  --extra-index-url https://www.piwheels.org/simple \
+  numpy
+
+# Install remaining Python packages.
+RUN pip3 --no-cache-dir install --user --no-warn-script-location \
+  --extra-index-url https://www.piwheels.org/simple \
+  -r /root/chasemapper/requirements.txt
+
+# Copy in chasemapper.
+COPY . /root/chasemapper
 
 # Download and install cusf_predictor_wrapper, and build predictor binary.
 ADD https://github.com/darksidelemm/cusf_predictor_wrapper/archive/master.zip /root/cusf_predictor_wrapper-master.zip
 RUN unzip /root/cusf_predictor_wrapper-master.zip -d /root && \
   rm /root/cusf_predictor_wrapper-master.zip && \
   cd /root/cusf_predictor_wrapper-master && \
-  python3 setup.py install && \
+  python3 setup.py install --user && \
   cd src && \
   mkdir build && \
   cd build && \
@@ -44,28 +43,20 @@ RUN unzip /root/cusf_predictor_wrapper-master.zip -d /root && \
 # -------------------------
 # The application container
 # -------------------------
-FROM debian:buster-slim
+FROM python:3.7-slim-buster
 EXPOSE 5001/tcp
 
-# Update system packages and install build dependencies.
+# Upgrade base packages and install application dependencies.
 RUN apt-get update && \
   apt-get upgrade -y && \
   apt-get install -y \
+  libgdal20 \
   libglib2.0 \
-  python3 \
+  tini && \
-  python3-dateutil \
-  python3-fastkml \
-  python3-flask \
-  python3-gdal \
-  python3-numpy \
-  python3-requests \
-  python3-serial \
-  python3-shapely \
-  unzip && \
   rm -rf /var/lib/apt/lists/*
 
 # Copy any additional Python packages from the build container.
-COPY --from=build /usr/local/lib/python3.7/dist-packages /usr/local/lib/python3.7/dist-packages
+COPY --from=build /root/.local /root/.local
 
 # Copy predictor binary and get_wind_data.py from the build container.
 COPY --from=build /root/cusf_predictor_wrapper-master/src/build/pred /opt/chasemapper/
@@ -74,6 +65,14 @@ COPY --from=build /root/cusf_predictor_wrapper-master/apps/get_wind_data.py /opt
 # Copy in chasemapper.
 COPY . /opt/chasemapper
 
-# Run horusmapper.py.
+# Set the working directory.
 WORKDIR /opt/chasemapper
+
+# Ensure scripts from Python packages are in PATH.
+ENV PATH=/root/.local/bin:$PATH
+
+# Use tini as init.
+ENTRYPOINT ["/usr/bin/tini", "--"]
+
+# Run horusmapper.py.
 CMD ["python3", "/opt/chasemapper/horusmapper.py"]