root
61 lines
2.5 KiB
Docker
61 lines
2.5 KiB
Docker
# syntax=docker/dockerfile:1
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# ---- deps: module download, cached until go.mod/go.sum change ----------------
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FROM golang:1.25-alpine AS deps
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WORKDIR /src
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COPY go.mod go.sum ./
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RUN --mount=type=cache,target=/go/pkg/mod go mod download
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# ---- test: `docker build --target test .` runs the test suite ----------------
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FROM deps AS test
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COPY . .
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RUN --mount=type=cache,target=/go/pkg/mod --mount=type=cache,target=/root/.cache/go-build \
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go vet ./... && go test ./...
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# ---- manual: an on-demand renderer for the PDF manual -----------------------
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# Not part of the app image, so deploying the app never waits for it. Running
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# this image renders docs/manual.md to /out/manual.pdf (typeset with WeasyPrint,
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# then coffee-stained, hole-punched and photocopied; see docs/pdf/). The file is
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# replaced atomically. Use scripts/render-manual.sh (compose volume) or
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# scripts/manual-pdf.sh (a local file).
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FROM alpine:3.20 AS manual
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RUN apk add --no-cache weasyprint py3-markdown py3-pillow py3-numpy font-liberation poppler-utils
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WORKDIR /manual
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COPY docs/pdf ./pdf
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COPY docs/manual.md .
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ENTRYPOINT ["python3", "pdf/render.py", "manual.md", "/out/manual.pdf"]
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# ---- build: static binaries (SQLite and Postgres drivers are pure Go) --------
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FROM deps AS build
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COPY . .
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ENV CGO_ENABLED=0
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RUN --mount=type=cache,target=/go/pkg/mod --mount=type=cache,target=/root/.cache/go-build \
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go build -trimpath -ldflags="-s -w" -o /out/ ./cmd/server ./cmd/daily ./cmd/asm
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# ---- final: small runtime image ----------------------------------------------
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FROM alpine:3.20
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RUN addgroup -S -g 10001 halcyon && adduser -S -u 10001 -G halcyon halcyon \
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&& mkdir /data && chown halcyon:halcyon /data
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COPY --from=build /out/server /out/daily /out/asm /usr/local/bin/
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USER halcyon
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WORKDIR /data
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# Where the world lives: "sqlite:<path>" or "postgres://user:pass@host/db".
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# The default is a SQLite file on the /data volume; override it at run time,
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# e.g. -e DATABASE_URL=postgres://... (the -db flag also overrides it).
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ENV DATABASE_URL=sqlite:/data/halcyon.db
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# The rendered PDF manual is read from here on every request. Compose mounts the
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# volume the manual renderer writes to; if the file is absent /manual.pdf is a 404.
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ENV MANUAL_PDF=/manual/manual.pdf
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VOLUME /data
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EXPOSE 8080
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HEALTHCHECK --interval=30s --timeout=3s --start-period=5s \
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CMD wget -q -O /dev/null http://127.0.0.1:8080/info || exit 1
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# Default: the API and website. Run one day of the belt with:
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# docker run --rm -e DATABASE_URL=... <image> daily
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CMD ["server"]
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