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webhooker/Dockerfile
clawbot 60d707b314
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fix: use absolute paths and static linking in Dockerfile
The container failed to start with 'exec ./webhooker: no such file or
directory'. Two issues:

1. Relative paths: COPY destination and CMD used relative paths (./webhooker).
   Changed to absolute paths (/app/webhooker) throughout.

2. Dynamic linking: The binary was built with CGO on Debian (glibc) but
   deployed to Alpine (musl). The kernel couldn't find the glibc dynamic
   linker, producing the misleading 'no such file or directory' error.
   Added a static rebuild step after make check so the binary runs on
   Alpine without glibc.
2026-03-17 04:42:51 -07:00

80 lines
2.8 KiB
Docker

# golang:1.24 (bookworm) — 2026-03-01
# Using Debian-based image because gorm.io/driver/sqlite pulls in
# mattn/go-sqlite3 (CGO), which does not compile on Alpine musl.
FROM golang@sha256:d2d2bc1c84f7e60d7d2438a3836ae7d0c847f4888464e7ec9ba3a1339a1ee804 AS builder
# gcc is pre-installed in the Debian-based golang image
RUN apt-get update && apt-get install -y --no-install-recommends make && rm -rf /var/lib/apt/lists/*
WORKDIR /build
# Install golangci-lint v1.64.8 — 2026-03-01
# Using v1.x because the repo's .golangci.yml uses v1 config format.
RUN set -eux; \
GOLANGCI_VERSION="1.64.8"; \
ARCH="$(uname -m)"; \
case "${ARCH}" in \
x86_64) \
GOARCH="amd64"; \
GOLANGCI_SHA256="b6270687afb143d019f387c791cd2a6f1cb383be9b3124d241ca11bd3ce2e54e"; \
;; \
aarch64) \
GOARCH="arm64"; \
GOLANGCI_SHA256="a6ab58ebcb1c48572622146cdaec2956f56871038a54ed1149f1386e287789a5"; \
;; \
*) echo "unsupported architecture: ${ARCH}" && exit 1 ;; \
esac; \
wget -q "https://github.com/golangci/golangci-lint/releases/download/v${GOLANGCI_VERSION}/golangci-lint-${GOLANGCI_VERSION}-linux-${GOARCH}.tar.gz" \
-O /tmp/golangci-lint.tar.gz; \
echo "${GOLANGCI_SHA256} /tmp/golangci-lint.tar.gz" | sha256sum -c -; \
tar -xzf /tmp/golangci-lint.tar.gz -C /tmp; \
mv "/tmp/golangci-lint-${GOLANGCI_VERSION}-linux-${GOARCH}/golangci-lint" /usr/local/bin/; \
rm -rf /tmp/golangci-lint*; \
golangci-lint --version
# Copy go module files and download dependencies
COPY go.mod go.sum ./
RUN go mod download
# Copy source code
COPY . .
# Run all checks (fmt-check, lint, test, build)
RUN make check
# Rebuild with static linking for Alpine runtime.
# make check already verified formatting, linting, tests, and compilation.
# The CGO binary from `make build` is dynamically linked against glibc,
# which doesn't exist on Alpine (musl). Rebuild with static linking so
# the binary runs on Alpine without glibc.
RUN CGO_ENABLED=1 go build -ldflags '-extldflags "-static"' -o bin/webhooker ./cmd/webhooker
# alpine:3.21 — 2026-03-01
FROM alpine@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709
RUN apk --no-cache add ca-certificates
# Create non-root user
RUN addgroup -g 1000 -S webhooker && \
adduser -u 1000 -S webhooker -G webhooker
WORKDIR /app
# Copy binary from builder
COPY --from=builder /build/bin/webhooker /app/webhooker
# Create data directory for all SQLite databases (main app DB +
# per-webhook event DBs). DATA_DIR defaults to /data in production.
RUN mkdir -p /data
RUN chown -R webhooker:webhooker /app /data
USER webhooker
EXPOSE 8080
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
CMD wget --no-verbose --tries=1 --spider http://localhost:8080/.well-known/healthcheck || exit 1
CMD ["/app/webhooker"]