Dockerfile

# Build the manager binary
FROM golang:1.26-alpine@sha256:2389ebfa5b7f43eeafbd6be0c3700cc46690ef842ad962f6c5bd6be49ed82039 AS builder

ARG TARGETOS
ARG TARGETARCH
ARG ENABLE_COVERAGE=false

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 api/ api/
COPY internal/ internal/

# Build with optional coverage instrumentation
RUN if [ "$ENABLE_COVERAGE" = "true" ]; then \
      CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -cover -covermode=atomic -tags=cover -a -o manager ./cmd/manager; \
    else \
      CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager ./cmd/manager; \
    fi

# 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@sha256:e3f945647ffb95b5839c07038d64f9811adf17308b9121d8a2b87b6a22a80a39
WORKDIR /
COPY --from=builder /workspace/manager .
USER 65532:65532

ENTRYPOINT ["/manager"]