69 lines
2.3 KiB
Docker
69 lines
2.3 KiB
Docker
# syntax=docker/dockerfile:experimental
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############################
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# STEP 1 build executable binary
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############################
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# FROM golang:alpine AS builder
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FROM --platform=$BUILDPLATFORM golang:1.17 as builder
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ARG VERSION
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ARG COMMIT_HASH
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ARG BUILD_DATE
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ARG TARGETOS
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ARG TARGETARCH
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RUN update-ca-certificates
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# RUN apk update && apk add --no-cache git
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# Create appuser.
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ENV USER=appuser
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ENV UID=10001
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# See https://stackoverflow.com/a/55757473/12429735RUN
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RUN adduser \
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--disabled-password \
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--gecos "" \
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--home "/nonexistent" \
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--shell "/sbin/nologin" \
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--no-create-home \
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--uid "${UID}" \
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"${USER}"
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WORKDIR $GOPATH/src/github.com/zinclabs/zinc/
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COPY . .
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# Fetch dependencies.
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# Using go get.
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RUN go get -d -v
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# Using go mod.
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# RUN go mod download
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# RUN go mod verify
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# Build the binary.
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# to tackle error standard_init_linux.go:207: exec user process caused "no such file or directory" set CGO_ENABLED=0.
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# CGO_ENABLED=0 builds a statically linked binary.
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# docs for -ldflags at https://pkg.go.dev/cmd/link
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# -w : Omit the DWARF symbol table.
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# -s : Omit the symbol table and debug information.
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# Omit the symbol table and debug information will reduce the binary size.
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# RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o zinc cmd/zinc/main.go
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ENV VERSION=$VERSION
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ENV COMMIT_HASH=$COMMIT_HASH
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ENV BUILD_DATE=$BUILD_DATE
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RUN CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -ldflags="-s -w -X github.com/zinclabs/zinc/pkg/meta/v1.Version=${VERSION} -X github.com/zinclabs/zinc/pkg/meta/v1.CommitHash=${COMMIT_HASH} -X github.com/zinclabs/zinc/pkg/meta/v1.BuildDate=${BUILD_DATE}" -o zinc cmd/zinc/main.go
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############################
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# STEP 2 build a small image
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############################
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# FROM public.ecr.aws/lts/ubuntu:latest
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FROM scratch
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# Import the user and group files from the builder.
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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 the ssl certificates
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COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
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# Copy our static executable.
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COPY --from=builder /go/src/github.com/zinclabs/zinc/zinc /go/bin/zinc
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# Use an unprivileged user.
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USER appuser:appuser
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# Port on which the service will be exposed.
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EXPOSE 4080
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# Run the zinc binary.
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ENTRYPOINT ["/go/bin/zinc"]
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