Dockerfile

FROM --platform=$BUILDPLATFORM golang:1.23.5-alpine3.20@sha256:def59a601e724ddac5139d447e8e9f7d0aeec25db287a9ee1615134bcda266e2 AS builder

RUN apk add --update --no-cache ca-certificates make git curl

ARG TARGETOS
ARG TARGETARCH
ARG GO_BUILD_FLAGS

WORKDIR /usr/local/src/telemetry-controller

# 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/main.go cmd/main.go
COPY api/ api/
COPY internal/controller/ internal/controller/

# Build
RUN CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build $GO_BUILD_FLAGS -o /usr/local/bin/manager cmd/main.go

FROM gcr.io/distroless/static:nonroot@sha256:6ec5aa99dc335666e79dc64e4a6c8b89c33a543a1967f20d360922a80dd21f02

COPY --from=builder /usr/local/bin/manager /manager
USER 65532:65532

ENTRYPOINT ["/manager"]