23 lines
742 B
Docker
23 lines
742 B
Docker
ARG DEBIAN_IMAGE=debian:stable-slim
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ARG BASE=gcr.io/distroless/static-debian12:nonroot
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FROM --platform=$BUILDPLATFORM ${DEBIAN_IMAGE} AS build
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SHELL [ "/bin/sh", "-ec" ]
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RUN export DEBCONF_NONINTERACTIVE_SEEN=true \
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DEBIAN_FRONTEND=noninteractive \
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DEBIAN_PRIORITY=critical \
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TERM=linux ; \
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apt-get -qq update ; \
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apt-get -yyqq upgrade ; \
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apt-get -yyqq install ca-certificates libcap2-bin; \
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apt-get clean
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COPY coredns /coredns
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RUN setcap cap_net_bind_service=+ep /coredns
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FROM --platform=$TARGETPLATFORM ${BASE}
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COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
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COPY --from=build /coredns /coredns
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USER nonroot:nonroot
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WORKDIR /
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EXPOSE 53 53/udp
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ENTRYPOINT ["/coredns"]
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