Dockerfile

# Build the manager binary
FROM golang:1.17 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 main.go main.go
COPY api/ api/
COPY internal/ internal/

ENV CGO_ENABLED=0
ENV GOOS=linux
ENV GOARCH=amd64
ENV GO111MODULE=on

# Do an initial compilation before setting the version so that there is less to
# re-compile when the version changes
RUN go build -mod=readonly ./...

ARG VERSION

# Build
RUN go build \
  -mod=readonly \
  -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 .

ENTRYPOINT ["/manager"]