| # Build the manager binary |
| FROM golang:1.20 as builder |
| ARG TARGETOS |
| ARG TARGETARCH |
| |
| 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 apis/ apis/ |
| COPY controllers/ controllers/ |
| |
| # 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 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"] |
