Dockerfile

# Build the manager binary
FROM registry.ci.openshift.org/openshift/release:rhel-9-release-golang-1.22-openshift-4.18 AS builder
ARG TARGETOS
ARG TARGETARCH

WORKDIR /workspace
# Copy the Go Modules manifests
COPY go.mod go.mod
COPY go.sum go.sum

# since we use vendoring we don't need to redownload our dependencies every time. Instead we can simply
# reuse our vendored directory and verify everything is good. If not we can abort here and ask for a revendor.
COPY vendor vendor/
RUN go mod verify

# Copy the go source
COPY cmd/main.go cmd/main.go
COPY api/ api/
COPY internal/ internal/


# Build
# the GOARCH has not a default value to allow the binary be built according to the host where the command
# was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
# the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
# by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
RUN GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -mod=vendor -a -o manager cmd/main.go

FROM registry.ci.openshift.org/ocp/4.18:base-rhel9
WORKDIR /
COPY --from=builder /workspace/manager .
USER 65532:65532

ENTRYPOINT ["/manager"]