3ad8f34e3f
Neither ARG or ENV are not expandable in ENTRYPOINT, though since ENV is available at runtime, we can use it as a work-around here. Thus, before [0], ENTRYPOINT could be overridden using env by passing --env BINARY=../../../<path to any binary>. Now previous default behavior is broken since we don't have ENTRYPOINT env var. This commit fixes default behavior and allows to modify it from build arg as was intended with [0]. [0] https://review.opendev.org/c/airship/airshipctl/+/791886 Change-Id: I115df039bc4f845d07f53f68fa3b716d86e8b3a9 Signed-off-by: Andrii Ostapenko <andrii.ostapenko@att.com>
47 lines
1.8 KiB
Docker
47 lines
1.8 KiB
Docker
ARG GO_IMAGE=gcr.io/gcp-runtimes/go1-builder:1.15
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ARG RELEASE_IMAGE=scratch
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FROM ${GO_IMAGE} as builder
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ENV PATH "/usr/local/go/bin:$PATH"
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# Inject custom root certificate authorities if needed
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# Docker does not have a good conditional copy statement and requires that a source file exists
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# to complete the copy function without error. Therefore the README.md file will be copied to
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# the image every time even if there are no .crt files.
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COPY ./certs/* /usr/local/share/ca-certificates/
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RUN update-ca-certificates
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RUN apt-get update -yq && apt-get upgrade -yq && apt-get install -y gcc make
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SHELL [ "/bin/bash", "-cex" ]
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WORKDIR /usr/src/airshipctl
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# Take advantage of caching for dependency acquisition
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COPY go.mod go.sum /usr/src/airshipctl/
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RUN go mod download
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COPY . /usr/src/airshipctl/
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ARG MAKE_TARGET=build
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RUN for target in $MAKE_TARGET; do make $target; done
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FROM ${RELEASE_IMAGE} as release
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LABEL org.opencontainers.image.authors='airship-discuss@lists.airshipit.org, irc://#airshipit@freenode' \
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org.opencontainers.image.url='https://airshipit.org' \
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org.opencontainers.image.documentation='https://docs.airshipit.org/airshipctl/' \
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org.opencontainers.image.source='https://opendev.org/airship/airshipctl' \
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org.opencontainers.image.vendor='The Airship Authors' \
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org.opencontainers.image.licenses='Apache-2.0'
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ARG BINARY=airshipctl
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ENV BINARY=${BINARY}
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COPY --from=builder /usr/src/airshipctl/bin/${BINARY} /usr/local/bin/${BINARY}
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USER 65534
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# ENTRYPOINT instruction does not expand args from both ENV and ARG.
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# Since variable defined with ENV is available at runtime it will be
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# consumed this way. This also means it may be overridden by passing
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# --env ENTRYPOINT=... to docker run
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ARG ENTRYPOINT=/usr/local/bin/${BINARY}
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ENV ENTRYPOINT=${ENTRYPOINT}
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ENTRYPOINT ${ENTRYPOINT}
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