clawbot
658aadbb81
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Add ENV GOMEMLIMIT=1536MiB to the runtime stage so the Go runtime keeps a 1.5 GiB soft heap limit. runuser preserves it the way it already does XDG_DATA_HOME, so the routewatch process inherits it. Add a Memory section to the README describing the budget (Go 1.5 GiB soft, SQLite 640 MiB pool cache and 1.5 GiB hard heap, ~0.2 GiB other), the required 5 GiB container limit, how to override GOMEMLIMIT, what happens at each limit, and the DEBUG=routewatch System stats line. Every sentence matches the behaviour already merged to next. Model: opus-4-8
96 lines
2.8 KiB
Docker
96 lines
2.8 KiB
Docker
# Lint stage — fast feedback on formatting and lint issues.
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# The golangci-lint image bundles Go, gcc and make, so it can run go vet on
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# the CGO sqlite package and golangci-lint without extra installs.
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# golangci/golangci-lint:v2.7.2 (Go 1.25.5), 2026-09-21
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FROM golangci/golangci-lint@sha256:5d6d5c70a61f1356adfd9dd6316ce286799fefc9d743421356ff1b00842368ba AS lint
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WORKDIR /src
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COPY go.mod go.sum ./
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RUN go mod download
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COPY . .
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RUN make fmt-check
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RUN make lint
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# Build stage
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# golang:1.24-bookworm, 2026-09-21
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FROM golang@sha256:1a6d4452c65dea36aac2e2d606b01b4a029ec90cc1ae53890540ce6173ea77ac AS builder
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# Install build dependencies (zstd for archive, gcc for CGO/sqlite3)
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RUN apt-get update && apt-get install -y --no-install-recommends \
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zstd \
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gcc \
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libc6-dev \
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&& rm -rf /var/lib/apt/lists/*
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WORKDIR /src
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# Force BuildKit to run the lint stage before compiling or testing.
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COPY --from=lint /src/go.sum /dev/null
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# Copy everything
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COPY . .
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# Vendor dependencies (must be after copying source)
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RUN go mod download && go mod vendor
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# Run the test suite in the build stage: -race needs cgo and the C compiler
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# installed above. The suite is offline (the live-feed test is opt-in).
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RUN make test
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# Build the binary with CGO enabled (required for sqlite3)
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RUN CGO_ENABLED=1 GOOS=linux go build -o /routewatch ./cmd/routewatch
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# Create source archive with vendored dependencies
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RUN tar --zstd -cf /routewatch-source.tar.zst \
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--exclude='.git' \
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--exclude='*.tar.zst' \
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.
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# Runtime stage
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# debian:bookworm-slim, 2026-09-21
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FROM debian@sha256:3783cc01769c7b2b1b83a5c5ad96c815348e28ed7da68e2e3687004faa906251
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# Install runtime dependencies
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# - ca-certificates: for HTTPS connections
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# - curl: for health checks
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RUN apt-get update && apt-get install -y --no-install-recommends \
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ca-certificates \
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curl \
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&& rm -rf /var/lib/apt/lists/*
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# Create non-root user
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RUN useradd -r -u 1000 -m routewatch
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RUN mkdir -p /var/lib/berlin.sneak.app.routewatch && chown routewatch:routewatch /var/lib/berlin.sneak.app.routewatch
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RUN mkdir /app
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WORKDIR /app
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# Copy binary and source archive from builder
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COPY --from=builder /routewatch /app/routewatch
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COPY --from=builder /routewatch-source.tar.zst /app/source/routewatch-source.tar.zst
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# Set ownership
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RUN chown -R routewatch:routewatch /app
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ENV XDG_DATA_HOME=/var/lib
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# Cap the Go heap at 1.5 GiB so the runtime collects harder before the
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# container's memory limit is reached. runuser preserves this the way it does
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# XDG_DATA_HOME above.
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ENV GOMEMLIMIT=1536MiB
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# Expose HTTP port
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EXPOSE 8080
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COPY ./entrypoint.sh /entrypoint.sh
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# Health check using the health endpoint
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HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
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CMD curl -sf http://localhost:8080/.well-known/healthcheck.json || exit 1
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ENTRYPOINT ["/bin/bash", "/entrypoint.sh" ]
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