mirror of
https://github.com/containrrr/watchtower.git
synced 2025-09-21 21:30:48 +02:00
54 lines
1.7 KiB
Text
54 lines
1.7 KiB
Text
#
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# Builder
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#
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FROM golang:alpine as builder
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# use version (for example "v0.3.3") or "main"
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ARG WATCHTOWER_VERSION=main
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# Pre download required modules to avoid redownloading at each build thanks to docker layer caching.
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# Copying go.mod and go.sum ensure to invalid the layer/build cache if there is a change in module requirement
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WORKDIR /watchtower
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COPY go.mod .
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COPY go.sum .
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RUN go mod download
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RUN apk add --no-cache \
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alpine-sdk \
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ca-certificates \
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git \
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tzdata
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COPY . /watchtower
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RUN \
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cd /watchtower && \
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\
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GO111MODULE=on CGO_ENABLED=0 GOOS=linux go build -a -ldflags "-extldflags '-static' -X github.com/nicholas-fedor/watchtower/internal/meta.Version=$(git describe --tags)" . && \
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GO111MODULE=on go test ./... -v
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#
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# watchtower
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#
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FROM scratch
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LABEL "com.centurylinklabs.watchtower"="true"
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LABEL "org.opencontainers.image.url"="https://nicholas-fedor.github.io/watchtower/" \
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"org.opencontainers.image.documentation"="https://nicholas-fedor.github.io/watchtower/" \
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"org.opencontainers.image.source"="https://github.com/nicholas-fedor/watchtower" \
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"org.opencontainers.image.licenses"="Apache-2.0" \
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"org.opencontainers.image.title"="Watchtower" \
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"org.opencontainers.image.description"="A process for automating Docker container base image updates." \
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"org.opencontainers.image.base.name"="alpine"
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# copy files from other container
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COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
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COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
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COPY --from=builder /watchtower/watchtower /watchtower
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HEALTHCHECK CMD [ "/watchtower", "--health-check"]
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ENTRYPOINT ["/watchtower"]
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