fix: properly pick talos client configuration

There was a bug in talosconfig iteration nested loop that `break` was
just stopping the internal loop.

Also allow building the container with race enabled.

Signed-off-by: Artem Chernyshev <artem.chernyshev@talos-systems.com>

Dockerfile

@@ -15,13 +15,13 @@ FROM ghcr.io/talos-systems/fhs:${PKGS} AS pkg-fhs
 
 FROM --platform=${BUILDPLATFORM} ${TOOLS} AS build
 SHELL ["/toolchain/bin/bash", "-c"]
+ARG CGO_ENABLED
 ENV PATH /toolchain/bin:/toolchain/go/bin:/go/bin
 RUN ["/toolchain/bin/mkdir", "/bin", "/tmp"]
 RUN ["/toolchain/bin/ln", "-svf", "/toolchain/bin/bash", "/bin/sh"]
 RUN ["/toolchain/bin/ln", "-svf", "/toolchain/etc/ssl", "/etc/ssl"]
 ENV GO111MODULE on
 ENV GOPROXY https://proxy.golang.org
-ENV CGO_ENABLED 0
 ENV GOCACHE /.cache/go-build
 ENV GOMODCACHE /.cache/mod
 RUN --mount=type=cache,target=/.cache go install sigs.k8s.io/controller-tools/cmd/controller-gen@v0.5.0
@@ -67,8 +67,10 @@ COPY --from=release-build /control-plane-components.yaml /control-plane-componen
 COPY --from=release-build /metadata.yaml /metadata.yaml
 
 FROM build AS binary
+ARG GO_BUILDFLAGS
+ARG GO_LDFLAGS
 ARG TARGETARCH
-RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=${TARGETARCH} go build -ldflags "-s -w" -o /manager
+RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=${TARGETARCH} go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /manager
 RUN chmod +x /manager
 
 FROM build AS integration-test-build

Makefile

@@ -5,6 +5,16 @@ TAG ?= $(shell git describe --tag --always --dirty)
 BRANCH ?= $(shell git rev-parse --abbrev-ref HEAD)
 REGISTRY_AND_USERNAME := $(REGISTRY)/$(USERNAME)
 NAME := cluster-api-control-plane-talos-controller
+WITH_RACE ?= false
+CGO_ENABLED = 0
+
+ifneq (, $(filter $(WITH_RACE), t true TRUE y yes 1))
+GO_BUILDFLAGS += -race
+CGO_ENABLED = 1
+GO_LDFLAGS += -linkmode=external -extldflags '-static'
+endif
+
+GO_LDFLAGS += -s -w
 
 ARTIFACTS := _out
 
@@ -23,6 +33,9 @@ COMMON_ARGS += --build-arg=NAME=$(NAME)
 COMMON_ARGS += --build-arg=TAG=$(TAG)
 COMMON_ARGS += --build-arg=PKGS=$(PKGS)
 COMMON_ARGS += --build-arg=TOOLS=$(TOOLS)
+COMMON_ARGS += --build-arg=GO_BUILDFLAGS="$(GO_BUILDFLAGS)"
+COMMON_ARGS += --build-arg=GO_LDFLAGS="$(GO_LDFLAGS)"
+COMMON_ARGS += --build-arg=CGO_ENABLED="$(CGO_ENABLED)"
 
 all: manifests container
 

controllers/configs.go

@@ -118,11 +118,12 @@ func (r *TalosControlPlaneReconciler) talosconfigForMachines(ctx context.Context
 				return nil, err
 			}
 
+		outer:
 			for _, cfg := range cfgs.Items {
 				for _, ref := range cfg.OwnerReferences {
 					if ref.Kind == "Machine" && ref.Name == machine.Name {
 						found = &cfg
-						break
+						break outer
 					}
 				}
 			}