Dockerfile.cross

ARG BUILD_IMAGE=grafana/loki-build-image:0.29.3

FROM golang:1.20.6-alpine as goenv
RUN go env GOARCH > /goarch && \
  go env GOARM > /goarm

FROM --platform=linux/amd64 $BUILD_IMAGE as builder
COPY --from=goenv /goarch /goarm /
WORKDIR /workspace
# Copy the Go Modules manifests
COPY apis/ apis/
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 main.go main.go
COPY controllers/ controllers/
COPY internal/ internal/

# Build
RUN CGO_ENABLED=0 GOOS=linux GO111MODULE=on GOARCH=$(cat /goarch) GOARM=$(cat /goarm) go build -a -o manager main.go

# Use distroless as minimal base image to package the manager binary
# Refer to https://github.com/GoogleContainerTools/distroless for more details
FROM gcr.io/distroless/static:nonroot
WORKDIR /
COPY --from=builder /workspace/manager .
USER 65532:65532

ENTRYPOINT ["/manager"]