feat: Update Dockerfile to add support to arbitrary user ids

container/Dockerfile

@@ -11,9 +11,10 @@ ENV PIP_REQUIRE_VIRTUALENV=true
 # Install golang needed by extensions
 ENV GO_VERSION=1.21.0
 ENV PATH="/usr/local/go/bin:${PATH}"
-RUN wget --progress=dot:giga "https://go.dev/dl/go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz" \
- && tar -C /usr/local -xzf "go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz" \
- && rm "go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz"
+RUN wget --progress=dot:giga \
+    "https://go.dev/dl/go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz" \
+    && tar -C /usr/local -xzf "go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz" \
+    && rm "go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz"
 
 # Copy the requirements.txt and install dependencies in venv. Using a separate
 # command to use layer caching.
@@ -29,35 +30,34 @@ COPY . /build/karapace-repo
 WORKDIR /build/karapace-repo
 RUN --mount=type=cache,target=/root/.cache/pip \
     if [ -z "${KARAPACE_VERSION}" ]; then \
-        PRETEND_VERSION="$(python -c 'from src.karapace import version; print(version.__version__)')"; \
+    PRETEND_VERSION="$(python -c 'from src.karapace import version; print(version.__version__)')"; \
     else \
-        PRETEND_VERSION=$KARAPACE_VERSION; \
+    PRETEND_VERSION=$KARAPACE_VERSION; \
     fi; \
     SETUPTOOLS_SCM_PRETEND_VERSION=$PRETEND_VERSION python3 -m pip install --no-deps .
 
 # Karapace image, i.e. production.
 FROM python:3.10.11-slim-bullseye AS karapace
 
 # Setup user and directories.
-RUN groupadd --system karapace \
- && useradd --system --gid karapace karapace \
- && mkdir /opt/karapace /opt/karapace/runtime /var/log/karapace \
- && chown --recursive karapace:karapace /opt/karapace /var/log/karapace
+RUN useradd --system --gid 0 karapace \
+    && mkdir /opt/karapace /opt/karapace/runtime /var/log/karapace \
+    && chgrp -R 0  /opt/karapace /opt/karapace/runtime /var/log/karapace \
+    && chmod -R g+rwX /opt/karapace
 
 # Install protobuf compiler.
 ARG PROTOBUF_COMPILER_VERSION="3.12.4-1+deb11u1"
 RUN apt-get update \
- && apt-get install --assume-yes --no-install-recommends \
+    && apt-get install --assume-yes --no-install-recommends \
     protobuf-compiler=$PROTOBUF_COMPILER_VERSION \
- && rm -rf /var/lib/apt/lists/*
+    && rm -rf /var/lib/apt/lists/*
 
 # Copy virtualenv from builder and activate it.
 COPY --from=builder /venv /venv
 ENV PATH="/venv/bin:$PATH"
 
 COPY ./container/start.sh /opt/karapace
-RUN chmod 500 /opt/karapace/start.sh \
- && chown karapace:karapace /opt/karapace/start.sh
+RUN chmod 550 /opt/karapace/start.sh
 
 COPY ./container/healthcheck.py /opt/karapace
 
@@ -66,3 +66,4 @@ USER karapace
 
 HEALTHCHECK --interval=10s --timeout=30s --retries=3 --start-period=60s \
     CMD python3 healthcheck.py http://localhost:$KARAPACE_PORT/_health || exit 1
+