22 lines
1.0 KiB
Docker
22 lines
1.0 KiB
Docker
FROM golang:1.25-alpine AS builder
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WORKDIR /build
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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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# GOMAXPROCS=1 limits the Go compiler to one OS thread during the Docker build.
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# Without this, go build spawns workers proportional to GOMAXPROCS (defaults to
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# the host CPU count), which combined with the parallel Node and Python builds
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# can saturate all cores and spike RAM on a 2-core / 2-4 GB server.
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RUN CGO_ENABLED=0 GOOS=linux GOMAXPROCS=1 go build -o /poller ./cmd/poller
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FROM alpine:3.21
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RUN apk add --no-cache ca-certificates iproute2
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COPY --from=builder /poller /usr/local/bin/poller
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COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
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# Strip Windows CRLF line endings and make executable (safe even if already LF)
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# Strip Windows CRLF and UTF-8 BOM if present (both break Linux shebang parsing)
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RUN sed -i 's/\r//' /usr/local/bin/docker-entrypoint.sh && \
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sed -i '1s/^\xef\xbb\xbf//' /usr/local/bin/docker-entrypoint.sh && \
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chmod +x /usr/local/bin/docker-entrypoint.sh
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ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
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