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Dockerfile
45
Dockerfile
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# Base-Image
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FROM ubuntu:resolute-20260404
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# ── Stage 1: Build ───────────────────────────────────────────────────────────
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FROM gcc:14-bookworm AS builder
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# Pakete installieren
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RUN apt-get update
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RUN apt-get install -y build-essential gcc curl vim net-tools
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WORKDIR /build
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COPY deployment.c .
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# Arbeitsverzeichnis setzen
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# Statisch linken → kein libc im Runtime-Image nötig
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RUN gcc -O2 -static -o deployment deployment.c
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# ── Stage 2: Runtime ─────────────────────────────────────────────────────────
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FROM alpine:3.21
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# Nicht-root-User anlegen
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RUN addgroup -S appgroup && adduser -S appuser -G appgroup
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# Output-Verzeichnis mit korrekten Rechten anlegen
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RUN mkdir /output && chown appuser:appgroup /output
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# Kompiliertes Binary aus Build-Stage kopieren
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COPY --from=builder /build/deployment /app/deployment
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# Volume für Ausgabe-Dateien
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VOLUME ["/output"]
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# Als nicht-root laufen
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USER appuser
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WORKDIR /app
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# alles kopieren
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COPY . .
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# Healthcheck: prüft ob das Binary vorhanden und ausführbar ist,
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# und ob die Ausgabedatei wächst / existiert
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HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
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CMD test -f /output/output.txt && test -s /output/output.txt || exit 1
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# Code kompilieren
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RUN gcc -o deployment deployment.c
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# Verzeichnis für Ausgabe anlegen
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RUN mkdir /output
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# Ausgabe wird ins Container-Dateisystem geschrieben
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ENTRYPOINT ["/bin/bash", "-c"]
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ENTRYPOINT ["/bin/sh", "-c"]
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CMD ["./deployment 10 > /output/output.txt && tail -f /output/output.txt"]
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