Graham McIntire
8f87d4bbab
Created build system for minimal Debian 13 (Trixie) image with Erlang/OTP and Elixir runtime pre-installed. This will speed up CI/CD builds by caching the runtime environment. Features: - Multi-stage Dockerfile for minimal final image (~150-200 MB) - Build script with automatic tagging (versioned, latest, dated) - Update script for easy security patch rebuilds - Makefile for common operations - Comprehensive documentation (README + QUICKSTART) Benefits: - Faster CI/CD: Saves 30-60s per build (no apt-get install runtime deps) - Smaller images: Only essential runtime packages included - Security: Easy to rebuild weekly/monthly with latest patches - Consistency: Same runtime across all environments Usage: cd k8s/base-image make build # Build the image make test # Verify it works make push # Push to registry Then update k8s/Dockerfile to use the custom base image. This replaces the previous Dockerfile.base approach with a more comprehensive and maintainable build system.
1.9 KiB
1.9 KiB
Quick Start Guide
One-Time Setup
cd k8s/base-image
# Login to GitLab registry
docker login registry.gitlab.com
# Build the base image
make build
# Test it works
make test
# Push to registry
make push
Update Main Dockerfile
Edit k8s/Dockerfile:
# Change this line:
ARG RUNNER_IMAGE="docker.io/debian:${DEBIAN_VERSION}"
# To this:
ARG RUNNER_IMAGE="registry.gitlab.com/towerops/towerops/elixir-runtime:28.3-elixir-1.19.5-debian-trixie"
Remove these lines (already in base image):
# DELETE THESE:
RUN apt-get update \
&& DEBIAN_FRONTEND=noninteractive apt-get upgrade -y \
&& DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
libstdc++6 openssl libncurses6 locales ca-certificates iputils-ping \
&& rm -rf /var/lib/apt/lists/*
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"
RUN chown nobody /app
Weekly/Monthly Maintenance
# Rebuild with latest security updates
cd k8s/base-image
make update
make push
Common Commands
make help # Show all commands
make build # Build base image
make test # Test base image
make push # Push to registry
make inspect # Show image details
make clean # Remove local images
Expected Results
- Build time: 2-3 minutes (first time)
- Image size: ~150-200 MB
- CI/CD speedup: 30-60 seconds saved per build
Troubleshooting
Build fails:
# Try with verbose output
docker build --progress=plain --no-cache -f Dockerfile .
Can't push to registry:
# Re-login
docker login registry.gitlab.com
Application crashes with missing library:
# Add to Dockerfile, then rebuild
RUN apt-get install -y your-package
make build && make push