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distroless

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This commit is contained in:
Graham McIntire 2025-06-15 15:19:29 -05:00
parent 74fe164c5b
commit 1a456849a4
2 changed files with 224 additions and 23 deletions
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105
Dockerfile
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@ -2,9 +2,12 @@ ARG ELIXIR_VERSION=1.18.4
ARG OTP_VERSION=27.2.4 ARG OTP_VERSION=27.2.4
ARG DEBIAN_VERSION=bullseye-20250520-slim ARG DEBIAN_VERSION=bullseye-20250520-slim
# Set default non-root user and group IDs
ARG USER_ID=1000
ARG GROUP_ID=1000
ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}" ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
# Use distroless base image - this includes glibc and essential libraries ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
ARG RUNNER_IMAGE="gcr.io/distroless/cc-debian11:nonroot"
FROM ${BUILDER_IMAGE} AS builder FROM ${BUILDER_IMAGE} AS builder
@ -31,11 +34,15 @@ RUN mix deps.get --only $MIX_ENV
RUN mkdir config RUN mkdir config
# copy compile-time config files before we compile dependencies # copy compile-time config files before we compile dependencies
# to ensure any relevant config change will trigger the dependencies
# to be re-compiled.
COPY config/config.exs config/${MIX_ENV}.exs config/ COPY config/config.exs config/${MIX_ENV}.exs config/
RUN mix deps.compile RUN mix deps.compile
COPY priv priv COPY priv priv
COPY lib lib COPY lib lib
COPY assets assets COPY assets assets
# compile assets # compile assets
@ -48,36 +55,88 @@ RUN mix compile
COPY config/runtime.exs config/ COPY config/runtime.exs config/
COPY rel rel COPY rel rel
RUN mix release && \ RUN mix release
chmod +x /app/_build/prod/rel/aprs/bin/server /app/_build/prod/rel/aprs/bin/aprs
# Final distroless stage # start a new build stage so that the final image will only contain
# the compiled release and other runtime necessities
FROM ${RUNNER_IMAGE} FROM ${RUNNER_IMAGE}
# Set environment variables for production # Install security updates and required packages
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update -y && \
apt-get upgrade -y && \
apt-get install -y --no-install-recommends \
libstdc++6 \
openssl \
libncurses5 \
locales \
ca-certificates \
tini && \
apt-get clean && \
rm -rf /var/lib/apt/lists/* && \
# Create a non-root user and group with specific ID
groupadd -g 1000 aprs && \
useradd -r -g aprs -u 1000 -s /bin/false -M aprs && \
# Remove setuid and setgid permissions
find / -perm /6000 -type f -exec chmod a-s {} \; || true && \
# Secure system configurations
chmod 0600 /etc/login.defs && \
chmod 0600 /etc/passwd && \
chmod 0600 /etc/group && \
# Create and secure app directory
mkdir -p /app && \
chown aprs:aprs /app && \
chmod 0750 /app
# Set the locale
RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8
WORKDIR "/app"
# Set security-related environment variables
ENV MIX_ENV="prod" \ ENV MIX_ENV="prod" \
LANG=C.UTF-8 \ LANG=en_US.UTF-8 \
# Disable history files for security LANGUAGE=en_US:en \
LC_ALL=en_US.UTF-8 \
# Disable history files
HISTFILE=/dev/null \ HISTFILE=/dev/null \
# Set HOME to /tmp (writable in distroless) # Prevent writing .erlang.cookie file
HOME=/tmp \ HOME=/dev/null \
# Configure Erlang VM # Add security headers
ERL_AFLAGS="+S 1:1 +A 1 +K true" \ SECURITY_HEADERS="true" \
# Disable debug info in production
ERL_AFLAGS="+S 1:1 +A 1 +K true -kernel shell_history enabled -kernel shell_history_file_bytes 0" \
PHX_SERVER=true PHX_SERVER=true
WORKDIR /app # Only copy the final release from the build stage
COPY --from=builder --chown=1000:1000 /app/_build/${MIX_ENV}/rel/aprs ./
# Copy the Elixir release from builder stage USER 1000
# nonroot user in distroless has UID 65532
COPY --from=builder --chown=65532:65532 /app/_build/prod/rel/aprs ./
# Add security metadata # Ensure the server binary is executable
RUN chmod +x /app/bin/server
# If using an environment that doesn't automatically reap zombie processes, it is
# advised to add an init process such as tini via `apt-get install`
# above and adding an entrypoint. See https://github.com/krallin/tini for details
# ENTRYPOINT ["/tini", "--"]
# Add specific capabilities needed by the app
CMD /app/bin/server
# Add security-related metadata
LABEL org.opencontainers.image.vendor="APRS.me" \ LABEL org.opencontainers.image.vendor="APRS.me" \
org.opencontainers.image.title="APRS.me Server (Distroless)" \ org.opencontainers.image.title="APRS.me Server" \
org.opencontainers.image.description="APRS.me server with distroless base" \ org.opencontainers.image.description="APRS.me server with security hardening" \
security.distroless="true" \ org.opencontainers.image.version="${MIX_ENV}" \
security.nonroot="true" org.opencontainers.image.created="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \
security.root-user="false" \
security.non-root-user="app" \
security.privileged="false"
# Run the server # Container configuration is handled by Dokku
ENTRYPOINT ["/app/bin/server"]
EXPOSE $PORT EXPOSE $PORT

142
Dockerfile.working Normal file
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@ -0,0 +1,142 @@
ARG ELIXIR_VERSION=1.18.4
ARG OTP_VERSION=27.2.4
ARG DEBIAN_VERSION=bullseye-20250520-slim
# Set default non-root user and group IDs
ARG USER_ID=1000
ARG GROUP_ID=1000
ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
FROM ${BUILDER_IMAGE} AS builder
# install build dependencies
RUN apt-get update -y && \
apt-get upgrade -y && \
apt-get install -y build-essential git && \
apt-get clean && \
rm -rf /var/lib/apt/lists/*
# prepare build dir
WORKDIR /app
# install hex + rebar
RUN mix local.hex --force && \
mix local.rebar --force
# set build ENV
ENV MIX_ENV="prod"
# install mix dependencies
COPY mix.exs mix.lock ./
RUN mix deps.get --only $MIX_ENV
RUN mkdir config
# copy compile-time config files before we compile dependencies
# to ensure any relevant config change will trigger the dependencies
# to be re-compiled.
COPY config/config.exs config/${MIX_ENV}.exs config/
RUN mix deps.compile
COPY priv priv
COPY lib lib
COPY assets assets
# compile assets
RUN mix assets.deploy
# Compile the release
RUN mix compile
# Changes to config/runtime.exs don't require recompiling the code
COPY config/runtime.exs config/
COPY rel rel
RUN mix release
# start a new build stage so that the final image will only contain
# the compiled release and other runtime necessities
FROM ${RUNNER_IMAGE}
# Install security updates and required packages
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update -y && \
apt-get upgrade -y && \
apt-get install -y --no-install-recommends \
libstdc++6 \
openssl \
libncurses5 \
locales \
ca-certificates \
tini && \
apt-get clean && \
rm -rf /var/lib/apt/lists/* && \
# Create a non-root user and group with specific ID
groupadd -g 1000 aprs && \
useradd -r -g aprs -u 1000 -s /bin/false -M aprs && \
# Remove setuid and setgid permissions
find / -perm /6000 -type f -exec chmod a-s {} \; || true && \
# Secure system configurations
chmod 0600 /etc/login.defs && \
chmod 0600 /etc/passwd && \
chmod 0600 /etc/group && \
# Create and secure app directory
mkdir -p /app && \
chown aprs:aprs /app && \
chmod 0750 /app
# Set the locale
RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8
WORKDIR "/app"
# Set security-related environment variables
ENV MIX_ENV="prod" \
LANG=en_US.UTF-8 \
LANGUAGE=en_US:en \
LC_ALL=en_US.UTF-8 \
# Disable history files
HISTFILE=/dev/null \
# Prevent writing .erlang.cookie file
HOME=/dev/null \
# Add security headers
SECURITY_HEADERS="true" \
# Disable debug info in production
ERL_AFLAGS="+S 1:1 +A 1 +K true -kernel shell_history enabled -kernel shell_history_file_bytes 0" \
PHX_SERVER=true
# Only copy the final release from the build stage
COPY --from=builder --chown=1000:1000 /app/_build/${MIX_ENV}/rel/aprs ./
USER 1000
# Ensure the server binary is executable
RUN chmod +x /app/bin/server
# If using an environment that doesn't automatically reap zombie processes, it is
# advised to add an init process such as tini via `apt-get install`
# above and adding an entrypoint. See https://github.com/krallin/tini for details
# ENTRYPOINT ["/tini", "--"]
# Add specific capabilities needed by the app
CMD /app/bin/server
# Add security-related metadata
LABEL org.opencontainers.image.vendor="APRS.me" \
org.opencontainers.image.title="APRS.me Server" \
org.opencontainers.image.description="APRS.me server with security hardening" \
org.opencontainers.image.version="${MIX_ENV}" \
org.opencontainers.image.created="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \
security.root-user="false" \
security.non-root-user="app" \
security.privileged="false"
# Container configuration is handled by Dokku
EXPOSE $PORT