Dockerfile changed according to task
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Dockerfile
55
Dockerfile
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# Base-Image
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FROM ubuntu:latest
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# Multi-Stage Build
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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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# ============================================
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# Build Stage
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# ============================================
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FROM debian:bookworm-slim AS build
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# Arbeitsverzeichnis setzen
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# Nur die benötigten Pakete installieren und danach Metadaten löschen die man nur für die INstallation braucht
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RUN apt-get update \
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&& apt-get install -y --no-install-recommends gcc libc6-dev \
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&& rm -rf /var/lib/apt/lists/*
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# WORKDIR setzen
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WORKDIR /app
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# alles kopieren
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# Source Code kopieren
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COPY . .
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# Code kompilieren
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# Compile
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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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# ============================================
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# Runtime Stage
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# ============================================
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FROM debian:bookworm-slim AS runtime
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# Ausgabe wird ins Container-Dateisystem geschrieben
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# Curl für den HEALTHCHECK
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RUN apt-get update \
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&& apt-get install -y --no-install-recommends curl \
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&& rm -rf /var/lib/apt/lists/*
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# Das output directory erstellen
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RUN mkdir -p /output
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# User ohne Root-Rechte erstellen
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RUN useradd -m app
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USER app
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# Das Binary aus der Build-Stage kopieren
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COPY --from=build /app/deployment /app/deployment
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# WORKDIR setzen
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WORKDIR /app
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#output als Mount angeben
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VOLUME ["/output"]
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# Programm starten
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ENTRYPOINT ["/bin/bash", "-c"]
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CMD ["./deployment 10 > /output/output.txt && tail -f /output/output.txt"]
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# prüfen ob output.txt existiert und aktualisiert wird
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HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
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CMD test -f /output/output.txt && test $(find /output/output.txt -mmin -1) && echo "healthy" || exit 1
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