Dockerfile

# Build the manager binary
FROM mirror.gcr.io/golang:1.24.5 AS builder

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
RUN CGO_ENABLED=0 GOOS=linux GO111MODULE=on go build -a -o custom-metrics-apiserver cmd/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/custom-metrics-apiserver .
USER 65532:65532

EXPOSE 8080

ENTRYPOINT ["/custom-metrics-apiserver"]