Dockerfile

# Build the manager binary
FROM golang:1.18 as builder

ARG TARGETPLATFORM
ARG BUILDPLATFORM

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 main.go main.go
COPY api/ api/
COPY controllers/ controllers/

# Build
ENV CGO_ENABLED=0 \
    GO111MODULE=on

SHELL ["/bin/bash", "-o", "pipefail", "-c"]
RUN \
  export GOOS \
  && GOOS=$(echo ${TARGETPLATFORM} | cut -d / -f1) \
  && export GOARCH \
  && GOARCH=$(echo ${TARGETPLATFORM} | cut -d / -f2) \
  && export GOARM \
  && GOARM=$(echo ${TARGETPLATFORM} | cut -d / -f3 | cut -c2-) \
  && 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"]