44 lines
1.4 KiB
Docker
44 lines
1.4 KiB
Docker
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# Built following https://medium.com/@chemidy/create-the-smallest-and-secured-golang-docker-image-based-on-scratch-4752223b7324
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# STEP 1 build executable binary
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FROM golang:alpine as builder
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# BUILD_DATE and VCS_REF are immaterial, since this is a 2-stage build, but our build
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# hook won't work unless we specify the args
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ARG BUILD_DATE
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ARG VCS_REF
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# Install SSL ca certificates
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RUN apk update && apk add git && apk add ca-certificates
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# Create appuser
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RUN adduser -D -g '' appuser
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COPY . $GOPATH/src/mypackage/myapp/
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WORKDIR $GOPATH/src/mypackage/myapp/
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#get dependancies
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RUN go get -d -v
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#build the binary
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RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -ldflags="-w -s" -o /go/bin/alertmanager-discord
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# STEP 2 build a small image
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# start from scratch
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FROM scratch
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# Now we DO need these, for the auto-labeling of the image
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ARG BUILD_DATE
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ARG VCS_REF
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# Good docker practice, plus we get microbadger badges
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LABEL org.label-schema.build-date=$BUILD_DATE \
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org.label-schema.vcs-url="https://github.com/funkypenguin/alertmanager-discord.git" \
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org.label-schema.vcs-ref=$VCS_REF \
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org.label-schema.schema-version="2.2-r1"
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COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
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COPY --from=builder /etc/passwd /etc/passwd
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# Copy our static executable
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COPY --from=builder /go/bin/alertmanager-discord /go/bin/alertmanager-discord
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EXPOSE 9094
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USER appuser
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ENTRYPOINT ["/go/bin/alertmanager-discord"]
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