CI/Dockerfile: mirror microwaveprop pattern (static docker, retry login, amd64 buildx, BUILD_TIMESTAMP arg)

This commit is contained in:
Graham McIntire 2026-04-29 12:43:39 -05:00
parent 40ad28e97b
commit 4b54b88b9f
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GPG key ID: F4ABF488E6029E59
2 changed files with 107 additions and 17 deletions

View file

@ -1,4 +1,4 @@
name: Build and Deploy
name: Build and Push
on:
push:
@ -22,9 +22,55 @@ jobs:
- name: Checkout code
uses: https://github.com/actions/checkout@v4
- name: Install Docker CLI
- name: Install Docker CLI and buildx
run: |
apt-get update && apt-get install -y docker.io
# Dodge apt entirely — the runner image's bookworm repos have been
# failing GPG verification with "At least one invalid signature".
# The static Docker client binary talks to the host's daemon socket
# that act_runner mounts into the job container. buildx is needed
# separately because the Dockerfile uses `--mount=type=cache`,
# which is a BuildKit-only feature.
curl -fsSL -o /tmp/docker.tgz \
https://download.docker.com/linux/static/stable/x86_64/docker-27.5.1.tgz
tar xzf /tmp/docker.tgz -C /tmp
install -m 0755 /tmp/docker/docker /usr/local/bin/docker
rm -rf /tmp/docker /tmp/docker.tgz
mkdir -p /usr/libexec/docker/cli-plugins
curl -fsSL -o /usr/libexec/docker/cli-plugins/docker-buildx \
https://github.com/docker/buildx/releases/download/v0.19.3/buildx-v0.19.3.linux-amd64
chmod +x /usr/libexec/docker/cli-plugins/docker-buildx
docker --version
docker buildx version
- name: Wait for Docker daemon
run: |
# act_runner mounts the host docker socket into the job, but
# the daemon side sometimes takes a moment to answer. Poll
# `docker info` until it responds so the login/build steps
# below don't race the socket and fail with "unable to
# connect to docker".
sock="${DOCKER_HOST:-unix:///var/run/docker.sock}"
echo "Using DOCKER_HOST=${sock}"
for i in $(seq 1 30); do
if docker info >/dev/null 2>&1; then
echo "Docker daemon reachable after ${i}s"
exit 0
fi
echo "Waiting for Docker daemon... ($i/30)"
sleep 1
done
echo "Docker daemon never became reachable — diagnostics:" >&2
echo "--- ls -l /var/run/docker.sock ---" >&2
ls -l /var/run/docker.sock 2>&1 || true
echo "--- env | grep -i docker ---" >&2
env | grep -i docker 2>&1 || true
echo "--- docker info (verbose) ---" >&2
docker info 2>&1 || true
exit 1
- name: Generate image tag
id: tag
@ -35,19 +81,54 @@ jobs:
echo "tag=${TAG}" >> $GITHUB_OUTPUT
- name: Log in to container registry
run: echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login ${{ secrets.REGISTRY_URL }} -u ${{ secrets.REGISTRY_USER }} --password-stdin
- name: Set up Docker Buildx
uses: https://github.com/docker/setup-buildx-action@v3
run: |
# Exponential backoff (2s, 4s, 8s) around docker login to
# ride out transient registry blips without failing the
# whole workflow.
attempt=1
max_attempts=3
while : ; do
if echo "${{ secrets.REGISTRY_PASSWORD }}" | \
docker login "${{ secrets.REGISTRY_URL }}" \
-u "${{ secrets.REGISTRY_USER }}" \
--password-stdin; then
exit 0
fi
if [ "$attempt" -ge "$max_attempts" ]; then
echo "docker login failed after $attempt attempts" >&2
exit 1
fi
delay=$((2 ** attempt))
echo "docker login attempt $attempt failed; retrying in ${delay}s"
sleep "$delay"
attempt=$((attempt + 1))
done
- name: Build and push Docker image
uses: https://github.com/docker/build-push-action@v5
with:
context: .
push: true
platforms: linux/amd64
provenance: false
sbom: false
tags: |
${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.tag.outputs.tag }}
${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:main
run: |
IMAGE="${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"
TAG="${{ steps.tag.outputs.tag }}"
BUILD_TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
attempt=1
max_attempts=3
while : ; do
if docker buildx build \
--platform linux/amd64 \
--provenance=false \
--sbom=false \
--build-arg BUILD_TIMESTAMP="${BUILD_TIMESTAMP}" \
-t "${IMAGE}:${TAG}" -t "${IMAGE}:latest" \
--push \
.; then
exit 0
fi
if [ "$attempt" -ge "$max_attempts" ]; then
echo "docker buildx build failed after $attempt attempts" >&2
exit 1
fi
delay=$((2 ** attempt))
echo "docker buildx build attempt $attempt failed; retrying in ${delay}s"
sleep "$delay"
attempt=$((attempt + 1))
done

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@ -1,3 +1,4 @@
# syntax=docker/dockerfile:1.6
# Build arguments
ARG ELIXIR_VERSION=1.19.5
ARG OTP_VERSION=28.3
@ -44,6 +45,11 @@ RUN mix release
# Runtime stage
FROM ${RUNNER_IMAGE}
# Build timestamp baked in by CI (--build-arg BUILD_TIMESTAMP=...).
# Only consumed in this final stage, so it never busts the earlier
# compile cache.
ARG BUILD_TIMESTAMP=unknown
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update -y && \
apt-get install -y --no-install-recommends \
@ -61,5 +67,8 @@ RUN chown -R elixir:root /app
COPY --from=builder --chown=elixir:root /app/_build/prod/rel/aprsme ./
RUN echo "${BUILD_TIMESTAMP}" > /app/BUILD_TIMESTAMP \
&& chown elixir:root /app/BUILD_TIMESTAMP
USER elixir
CMD ["/app/bin/server"]