Graham McIntire
31cbd18128
Splits the runtime apt installs (gdal-bin, snmp, libsnmp40, locales, BEAM runtime libs) into k8s/Dockerfile.base, hosted at codeberg.org/gmcintire/towerops-base:latest. The app Dockerfile now does FROM that base instead of re-installing gdal (~500 MB) on every push. The new build-base workflow rebuilds the base image only when k8s/Dockerfile.base or the workflow itself changes, weekly via cron (Sundays 06:00 UTC, with CACHE_BUST=<ISO week> to force apt-get update on a week boundary), or via workflow_dispatch. Production workflow now uses buildx + does docker login before the build so it can pull the private base image.
109 lines
3.2 KiB
Docker
109 lines
3.2 KiB
Docker
# syntax=docker/dockerfile:1.6
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# Find eligible builder images on Docker Hub. We use Ubuntu/Debian
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# instead of Alpine to avoid DNS resolution issues in production.
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#
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# https://hub.docker.com/r/hexpm/elixir/tags?name=ubuntu
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#
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# This file is based on these images:
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#
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# - https://hub.docker.com/r/hexpm/elixir/tags - for the build image
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# - codeberg.org/gmcintire/towerops-base - prebuilt runtime base (see Dockerfile.base)
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# - Ex: docker.io/hexpm/elixir:1.19.5-erlang-28.4.1-debian-trixie-20260316-slim
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#
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ARG ELIXIR_VERSION=1.19.5
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ARG OTP_VERSION=28.4.1
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ARG DEBIAN_VERSION=trixie-20260316-slim
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ARG BUILDER_IMAGE="docker.io/hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
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# Prebuilt runtime base (see Dockerfile.base) ships with gdal-bin +
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# snmp + libsnmp40 + locale + BEAM runtime apt deps already installed.
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# Built by .forgejo/workflows/build-base.yaml only when Dockerfile.base
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# changes, so this Dockerfile pulls a ready-made layer instead of
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# reinstalling gdal (~500 MB) on every push.
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ARG BASE_IMAGE="codeberg.org/gmcintire/towerops-base:latest"
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FROM ${BUILDER_IMAGE} AS builder
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ENV MIX_OS_DEPS_COMPILE_PARTITION_COUNT=6
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# Disable TTY for cross-architecture builds
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ENV TERM=dumb
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# install build dependencies
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RUN apt-get update \
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&& DEBIAN_FRONTEND=noninteractive apt-get upgrade -y \
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&& DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends build-essential git curl libsnmp-dev \
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&& rm -rf /var/lib/apt/lists/*
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# prepare build dir
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WORKDIR /app
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# set build ENV
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ENV MIX_ENV="prod"
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# install hex + rebar
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RUN mix local.hex --force \
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&& mix local.rebar --force
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# install mix dependencies
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COPY mix.exs mix.lock ./
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COPY vendor vendor
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RUN mix deps.get --only $MIX_ENV
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RUN mkdir config
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# copy compile-time config files before we compile dependencies
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# to ensure any relevant config change will trigger the dependencies
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# to be re-compiled.
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COPY config/config.exs config/${MIX_ENV}.exs config/
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RUN mix deps.compile
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RUN mix assets.setup
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COPY priv priv
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COPY c_src c_src
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# Compile the C NIF before Elixir compilation
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RUN cd c_src && make
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COPY lib lib
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# Compile the release
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RUN mix compile
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COPY assets assets
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# compile assets
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RUN mix assets.deploy
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# Changes to config/runtime.exs don't require recompiling the code
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COPY config/runtime.exs config/
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COPY rel rel
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RUN mix release
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# Final runtime stage. Pulls the prebuilt towerops-base image
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# (Dockerfile.base) which already carries gdal-bin + snmp + libsnmp40 +
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# locale + BEAM runtime apt deps. We just COPY the Elixir release on
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# top.
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FROM ${BASE_IMAGE} AS final
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WORKDIR "/app"
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RUN chown nobody /app
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# set runner ENV
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ENV MIX_ENV="prod"
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# Only copy the final release from the build stage
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COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/towerops ./
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USER nobody
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# If using an environment that doesn't automatically reap zombie processes, it is
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# advised to add an init process such as tini via `apt-get install`
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# above and adding an entrypoint. See https://github.com/krallin/tini for details
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# ENTRYPOINT ["/tini", "--"]
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# Health check for container orchestration
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HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
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CMD ["/app/bin/towerops", "rpc", "1 + 1"]
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CMD ["/app/bin/server"]
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