build(notifications-api): Switch to psycopg2

The previously used "psycopg2-binary" has been used as a workaround initially,
because it was difficult to build psycopg2.

Now the usage with very recent PostgreSQL databases unveiled issues of the
binary package at least on aarch64 architectures.

Issue: #640
See-Also: psycopg/psycopg2#1360

notifications-api/Dockerfile

@@ -4,18 +4,36 @@ ARG WORKDIR=/app
 ARG USER=fastapi
 RUN useradd -m "$USER"
 WORKDIR "$WORKDIR"
-RUN chown "$USER":"$USER" "$WORKDIR" && \
-    mkdir -p /var/local/notifications-api && \
-    chown "$USER":"$USER" /var/local/notifications-api
+RUN chown "$USER":"$USER" "$WORKDIR" \
+    && mkdir -p /var/local/notifications-api \
+    && chown "$USER":"$USER" /var/local/notifications-api \
+    && apt-get -qq update \
+    && apt-get --assume-yes --verbose-versions --no-install-recommends install \
+      libpq5=13.* \
+    && rm -fr /var/lib/apt/lists/* /var/cache/apt/archives/*
 USER "$USER"
 ENV PATH="/home/${USER}/.local/bin:${PATH}"
 ENV PYTHONPATH="."
 ENV WEB_CONCURRENCY=1
 
 
+FROM base as builder
+USER root
+RUN apt-get -qq update \
+    && apt-get --assume-yes --verbose-versions --no-install-recommends install \
+      libpq-dev=13.* \
+      build-essential=12.* \
+      gcc=4:10.* \
+    && rm -fr /var/lib/apt/lists/* /var/cache/apt/archives/*
+USER "$USER"
+COPY ./requirements.txt .
+RUN pip wheel --no-cache-dir --wheel-dir=./wheels -c requirements.txt psycopg2
+
+
 FROM base as test
 COPY ./requirements-dev.txt .
-RUN pip install --no-cache-dir -r requirements-dev.txt
+COPY --from=builder /app/wheels ./wheels
+RUN pip install --no-cache-dir --find-links=./wheels -r requirements-dev.txt
 CMD ["pytest"]
 
 
@@ -31,7 +49,11 @@ FROM base as final
 ENV PYTHONPATH="$WORKDIR"
 
 COPY ./requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+# TODO: RUN --mount is not yet supported in kaniko,
+# See https://github.com/GoogleContainerTools/kaniko/issues/1568
+# RUN --mount=type=bind,from=builder,source=/app/wheels,target=/app/wheels \
+COPY --from=builder /app/wheels ./wheels
+RUN pip install --no-cache-dir --find-links=./wheels -r requirements.txt
 
 COPY ./ ./
 EXPOSE 8080

notifications-api/pyproject.toml

@@ -19,7 +19,7 @@ dependencies = [
   'pydantic >= 1.10.2',
   'sse-starlette >= 1.2.1',
   # TODO: Replace with psycopg2
-  'psycopg2-binary',
+  'psycopg2',
   'pyzmq',
 ]
 

notifications-api/requirements-dev.txt

@@ -33,7 +33,7 @@ pexpect==4.8.0
 pickleshare==0.7.5
 pluggy==1.0.0
 prompt-toolkit==3.0.36
-psycopg2-binary==2.9.5
+psycopg2==2.9.5
 ptyprocess==0.7.0
 pure-eval==0.2.2
 pydantic==1.10.4

notifications-api/requirements.txt

@@ -9,10 +9,10 @@ httptools==0.5.0
 idna==3.4
 Mako==1.2.4
 MarkupSafe==2.1.1
-psycopg2-binary==2.9.5
 pydantic==1.10.4
 pydash==5.1.2
 python-dotenv==0.21.0
+psycopg2==2.9.5
 PyYAML==6.0
 pyzmq==24.0.1
 sniffio==1.3.0