clawbot
17e740a45f
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Closes #48 ## Problem The Docker container failed to start with: ``` exec ./webhooker: no such file or directory ``` Two root causes: 1. **Relative paths**: `COPY` destination and `CMD` used relative paths (`./webhooker`), depending on `WORKDIR` context. 2. **Dynamic linking** (the actual root cause): The binary was built with CGO enabled on Debian (glibc) via `make build`, but deployed to an Alpine runtime (musl). The kernel couldn't find the glibc dynamic linker (`/lib64/ld-linux-x86-64.so.2`), producing the misleading "no such file or directory" error — even though the file existed on disk. ## Fix - **Absolute paths throughout**: `COPY --from=builder /build/bin/webhooker /app/webhooker` and `CMD ["/app/webhooker"]` — no reliance on WORKDIR. - **Static rebuild for Alpine**: Added a `RUN CGO_ENABLED=1 go build -ldflags '-extldflags "-static"' -o bin/webhooker ./cmd/webhooker` step after `make check`. This rebuilds the binary with static linking so it runs on Alpine without glibc. The `make check` step still runs normally (formatting, linting, tests, dynamic build) — the static rebuild is only for the deployment binary. ## Verification - `docker build .` passes (all checks green) - Container starts successfully and initializes the Fx dependency graph - The README already stated "The runtime binary is statically linked and runs on Alpine" — this fix makes that claim actually true. Co-authored-by: clawbot <clawbot@users.noreply.git.eeqj.de> Reviewed-on: #49 Co-authored-by: clawbot <clawbot@noreply.example.org> Co-committed-by: clawbot <clawbot@noreply.example.org>
80 lines
2.8 KiB
Docker
80 lines
2.8 KiB
Docker
# golang:1.24 (bookworm) — 2026-03-01
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# Using Debian-based image because gorm.io/driver/sqlite pulls in
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# mattn/go-sqlite3 (CGO), which does not compile on Alpine musl.
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FROM golang@sha256:d2d2bc1c84f7e60d7d2438a3836ae7d0c847f4888464e7ec9ba3a1339a1ee804 AS builder
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# gcc is pre-installed in the Debian-based golang image
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RUN apt-get update && apt-get install -y --no-install-recommends make && rm -rf /var/lib/apt/lists/*
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WORKDIR /build
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# Install golangci-lint v1.64.8 — 2026-03-01
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# Using v1.x because the repo's .golangci.yml uses v1 config format.
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RUN set -eux; \
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GOLANGCI_VERSION="1.64.8"; \
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ARCH="$(uname -m)"; \
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case "${ARCH}" in \
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x86_64) \
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GOARCH="amd64"; \
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GOLANGCI_SHA256="b6270687afb143d019f387c791cd2a6f1cb383be9b3124d241ca11bd3ce2e54e"; \
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;; \
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aarch64) \
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GOARCH="arm64"; \
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GOLANGCI_SHA256="a6ab58ebcb1c48572622146cdaec2956f56871038a54ed1149f1386e287789a5"; \
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;; \
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*) echo "unsupported architecture: ${ARCH}" && exit 1 ;; \
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esac; \
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wget -q "https://github.com/golangci/golangci-lint/releases/download/v${GOLANGCI_VERSION}/golangci-lint-${GOLANGCI_VERSION}-linux-${GOARCH}.tar.gz" \
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-O /tmp/golangci-lint.tar.gz; \
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echo "${GOLANGCI_SHA256} /tmp/golangci-lint.tar.gz" | sha256sum -c -; \
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tar -xzf /tmp/golangci-lint.tar.gz -C /tmp; \
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mv "/tmp/golangci-lint-${GOLANGCI_VERSION}-linux-${GOARCH}/golangci-lint" /usr/local/bin/; \
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rm -rf /tmp/golangci-lint*; \
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golangci-lint --version
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# Copy go module files and download dependencies
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COPY go.mod go.sum ./
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RUN go mod download
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# Copy source code
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COPY . .
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# Run all checks (fmt-check, lint, test, build)
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RUN make check
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# Rebuild with static linking for Alpine runtime.
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# make check already verified formatting, linting, tests, and compilation.
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# The CGO binary from `make build` is dynamically linked against glibc,
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# which doesn't exist on Alpine (musl). Rebuild with static linking so
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# the binary runs on Alpine without glibc.
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RUN CGO_ENABLED=1 go build -ldflags '-extldflags "-static"' -o bin/webhooker ./cmd/webhooker
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# alpine:3.21 — 2026-03-01
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FROM alpine@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709
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RUN apk --no-cache add ca-certificates
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# Create non-root user
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RUN addgroup -g 1000 -S webhooker && \
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adduser -u 1000 -S webhooker -G webhooker
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WORKDIR /app
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# Copy binary from builder
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COPY --from=builder /build/bin/webhooker /app/webhooker
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# Create data directory for all SQLite databases (main app DB +
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# per-webhook event DBs). DATA_DIR defaults to /data in production.
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RUN mkdir -p /data
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RUN chown -R webhooker:webhooker /app /data
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USER webhooker
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EXPOSE 8080
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HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
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CMD wget --no-verbose --tries=1 --spider http://localhost:8080/.well-known/healthcheck || exit 1
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CMD ["/app/webhooker"]
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