mirror of https://github.com/Pull-Pal/pull-pal.git
60 lines
1.6 KiB
Docker
60 lines
1.6 KiB
Docker
# Check out this cool article:
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# https://chemidy.medium.com/create-the-smallest-and-secured-golang-docker-image-based-on-scratch-4752223b7324
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# We recommend building with docker's buildx toolset
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ARG BUILDER_IMAGE=golang:alpine
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############################
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# STEP 1 build executable binary
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############################
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FROM ${BUILDER_IMAGE} as builder
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# Install git + SSL ca certificates.
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# Git is required for fetching the dependencies.
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# Ca-certificates is required to call HTTPS endpoints.
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RUN apk update && apk add --no-cache git ca-certificates tzdata && update-ca-certificates
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# Create appuser
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ENV USER=pullpal
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ENV UID=10001
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# See https://stackoverflow.com/a/55757473/12429735
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RUN adduser \
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--disabled-password \
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--gecos "" \
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--home "/nonexistent" \
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--shell "/sbin/nologin" \
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--no-create-home \
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--uid "${UID}" \
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"${USER}"
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WORKDIR $GOPATH/src/mypackage/myapp/
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COPY . .
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# Fetch dependencies.
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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 \
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-ldflags='-w -s -extldflags "-static"' -a \
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-o /go/bin/pullpal .
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############################
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# STEP 2 build a small image
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############################
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FROM alpine
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# Import from builder.
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COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
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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 --from=builder /etc/group /etc/group
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# Copy our static executable
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COPY --from=builder /go/bin/pullpal /go/bin/pullpal
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# Use an unprivileged user.
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USER pullpal:pullpal
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# Run the pullpal binary.
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ENTRYPOINT ["/go/bin/pullpal","--config=/etc/pullpal/config.yaml"]
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