Dockerfile

# syntax=docker/dockerfile:1.4

# Build the manager binary
FROM golang:1.21 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 --mount=type=cache,target=/go/pkg/mod \
    go mod download

# Copy the go source
COPY main.go main.go
COPY --link api/ api/
COPY --link controllers/ controllers/

# Build
RUN --mount=type=cache,target=/go/pkg/mod --mount=type=cache,target=/root/.cache/go-build \
    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -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
WORKDIR /app
COPY --from=builder --chown=65532.0 /workspace/manager .
USER 65532

ENTRYPOINT ["/app/manager"]