Dockerfile

FROM golang:1.26@sha256:792443b89f65105abba56b9bd5e97f680a80074ac62fc844a584212f8c8102c3 AS builder

ARG TARGETOS
ARG TARGETARCH
ARG APPLICATION_VERSION=dev

WORKDIR /workspace
# Copy the Go Modules manifests
COPY go.mod go.mod
COPY go.sum go.sum
# cache deps before building and copying source so that we don't need to re-download as much
# and so that source changes don't invalidate our downloaded layer
RUN go mod download

# Copy the go source
COPY cmd/ cmd/
COPY pkg/ pkg/

# Build
# the GOARCH has not a default value to allow the binary be built according to the host where the command
# was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
# the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
# by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o nodeip-discovery \
    -ldflags "-X 'github.com/scality/nodeip-discovery/cmd/config.ApplicationVersion=${APPLICATION_VERSION}'" \
    cmd/main.go

################################################
########### Build the final image ##############
################################################
FROM gcr.io/distroless/static:nonroot@sha256:f7f8f729987ad0fdf6b05eeeae94b26e6a0f613bdf46feea7fc40f7bd72953e6

WORKDIR /
COPY --from=builder /workspace/nodeip-discovery /nodeip-discovery

USER 65532:65532

ENTRYPOINT ["/nodeip-discovery"]