chore: reduce binary size

Makefile

@@ -26,20 +26,11 @@ push-dev:
 
 build-go:
 	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o $(PWD)/dist/images/kube-ovn -ldflags $(GOLDFLAGS) -v ./cmd/cni
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o $(PWD)/dist/images/kube-ovn-controller -ldflags $(GOLDFLAGS) -v ./cmd/controller
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o $(PWD)/dist/images/kube-ovn-daemon -ldflags $(GOLDFLAGS) -v ./cmd/daemon
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o $(PWD)/dist/images/kube-ovn-pinger -ldflags $(GOLDFLAGS) -v ./cmd/pinger
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o $(PWD)/dist/images/kube-ovn-monitor -ldflags $(GOLDFLAGS) -v ./cmd/ovn_monitor
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o $(PWD)/dist/images/kube-ovn-speaker -ldflags $(GOLDFLAGS) -v ./cmd/speaker
-
+	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o $(PWD)/dist/images/kube-ovn-cmd -ldflags $(GOLDFLAGS) -v ./cmd
 
 build-go-arm:
 	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o $(PWD)/dist/images/kube-ovn -ldflags $(GOLDFLAGS) -v ./cmd/cni
-	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o $(PWD)/dist/images/kube-ovn-controller -ldflags $(GOLDFLAGS) -v ./cmd/controller
-	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o $(PWD)/dist/images/kube-ovn-daemon -ldflags $(GOLDFLAGS) -v ./cmd/daemon
-	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o $(PWD)/dist/images/kube-ovn-pinger -ldflags $(GOLDFLAGS) -v ./cmd/pinger
-	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o $(PWD)/dist/images/kube-ovn-monitor -ldflags $(GOLDFLAGS) -v ./cmd/ovn_monitor
-	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o $(PWD)/dist/images/kube-ovn-speaker -ldflags $(GOLDFLAGS) -v ./cmd/speaker
+	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o $(PWD)/dist/images/kube-ovn-cmd -ldflags $(GOLDFLAGS) -v ./cmd
 
 release: lint build-go
 	docker buildx build --cache-from "type=local,src=/tmp/.buildx-cache" --cache-to "type=local,dest=/tmp/.buildx-cache" --platform linux/amd64 --build-arg ARCH=amd64 --build-arg RPM_ARCH=x86_64 -t ${REGISTRY}/kube-ovn:${RELEASE_TAG} -o type=docker -f dist/images/Dockerfile dist/images/

cmd/cmdmain.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"github.com/alauda/kube-ovn/cmd/controller"
+	"github.com/alauda/kube-ovn/cmd/daemon"
+	"github.com/alauda/kube-ovn/cmd/ovn_monitor"
+	"github.com/alauda/kube-ovn/cmd/pinger"
+	"github.com/alauda/kube-ovn/cmd/speaker"
+	"k8s.io/klog"
+	"os"
+	"strings"
+)
+
+const (
+	CmdController = "kube-ovn-controller"
+	CmdDaemon     = "kube-ovn-daemon"
+	CmdMonitor    = "kube-ovn-monitor"
+	CmdPinger     = "kube-ovn-pinger"
+	CmdSpeaker    = "kube-ovn-speaker"
+)
+
+func main() {
+	cmds := strings.Split(os.Args[0], "/")
+	cmd := cmds[len(cmds)-1]
+	switch cmd {
+	case CmdController:
+		controller.CmdMain()
+	case CmdDaemon:
+		daemon.CmdMain()
+	case CmdMonitor:
+		ovn_monitor.CmdMain()
+	case CmdPinger:
+		pinger.CmdMain()
+	case CmdSpeaker:
+		speaker.CmdMain()
+	default:
+		klog.Fatalf("%s is an unknown command", cmd)
+	}
+}

cmd/controller/controller.go

@@ -1,4 +1,4 @@
-package main
+package controller
 
 import (
 	"fmt"
@@ -16,12 +16,14 @@ import (
 	"k8s.io/sample-controller/pkg/signals"
 )
 
-func main() {
+func CmdMain() {
 	defer klog.Flush()
 
 	stopCh := signals.SetupSignalHandler()
 	klog.Infof(versions.String())
 
+	controller.InitClientGoMetrics()
+	controller.InitWorkQueueMetrics()
 	config, err := controller.ParseFlags()
 	if err != nil {
 		klog.Fatalf("parse config failed %v", err)

cmd/daemon/cniserver.go

@@ -1,4 +1,4 @@
-package main
+package daemon
 
 import (
 	"fmt"
@@ -17,10 +17,11 @@ import (
 	"k8s.io/sample-controller/pkg/signals"
 )
 
-func main() {
+func CmdMain() {
 	defer klog.Flush()
 
 	klog.Infof(versions.String())
+	daemon.InitMetrics()
 	config, err := daemon.ParseFlags()
 	if err != nil {
 		klog.Fatalf("parse config failed %v", err)

cmd/ovn_monitor/ovn_monitor.go

@@ -1,4 +1,4 @@
-package main
+package ovn_monitor
 
 import (
 	"github.com/alauda/kube-ovn/versions"
@@ -9,7 +9,7 @@ import (
 	"k8s.io/klog"
 )
 
-func main() {
+func CmdMain() {
 	defer klog.Flush()
 
 	klog.Infof(versions.String())

cmd/pinger/pinger.go

@@ -1,4 +1,4 @@
-package main
+package pinger
 
 import (
 	"fmt"
@@ -10,10 +10,11 @@ import (
 	"k8s.io/klog"
 )
 
-func main() {
+func CmdMain() {
 	defer klog.Flush()
 
 	klog.Infof(versions.String())
+	pinger.InitPingerMetrics()
 	config, err := pinger.ParseFlags()
 	if err != nil {
 		klog.Fatalf("parse config failed %v", err)

cmd/speaker/speaker.go

@@ -1,4 +1,4 @@
-package main
+package speaker
 
 import (
 	"fmt"
@@ -10,7 +10,7 @@ import (
 	"net/http"
 )
 
-func main() {
+func CmdMain() {
 	defer klog.Flush()
 
 	klog.Infof(versions.String())

dist/images/Dockerfile

@@ -53,13 +53,13 @@ RUN --mount=type=bind,target=/rpms,from=ovs-rpm,source=/rpms rpm -ivh --nodeps /
 COPY *.sh /kube-ovn/
 COPY grace_stop_ovn_controller /usr/share/ovn/scripts/grace_stop_ovn_controller
 COPY 01-kube-ovn.conflist /kube-ovn/01-kube-ovn.conflist
+RUN rpm -e --nodeps sqlite-libs
 
 WORKDIR /kube-ovn
-
-RUN rpm -e --nodeps sqlite-libs
-COPY kube-ovn-pinger /kube-ovn/kube-ovn-pinger
 COPY kube-ovn /kube-ovn/kube-ovn
-COPY kube-ovn-daemon /kube-ovn/kube-ovn-daemon
-COPY kube-ovn-controller /kube-ovn/kube-ovn-controller
-COPY kube-ovn-monitor /kube-ovn/kube-ovn-monitor
-COPY kube-ovn-speaker /kube-ovn/kube-ovn-speaker
+COPY kube-ovn-cmd /kube-ovn/kube-ovn-cmd
+RUN ln -s /kube-ovn/kube-ovn-cmd /kube-ovn/kube-ovn-controller && \
+    ln -s /kube-ovn/kube-ovn-cmd /kube-ovn/kube-ovn-daemon && \
+    ln -s /kube-ovn/kube-ovn-cmd /kube-ovn/kube-ovn-monitor && \
+    ln -s /kube-ovn/kube-ovn-cmd /kube-ovn/kube-ovn-pinger && \
+    ln -s /kube-ovn/kube-ovn-cmd /kube-ovn/kube-ovn-speaker

pkg/controller/client_go_adapter.go

@@ -107,7 +107,7 @@ var (
 	}, []string{"name"})
 )
 
-func init() {
+func InitClientGoMetrics() {
 	registerClientMetrics()
 	registerReflectorMetrics()
 }

pkg/controller/workqueue_metrics.go

@@ -27,7 +27,7 @@ import (
 // which registers metrics to the default prometheus Registry. We require very
 // similar functionality, but must register metrics to a different Registry.
 
-func init() {
+func InitWorkQueueMetrics() {
 	workqueue.SetProvider(workqueueMetricsProvider{})
 }
 

pkg/daemon/metrics.go

@@ -112,7 +112,7 @@ var (
 	}, []string{"name"})
 )
 
-func init() {
+func InitMetrics() {
 	registerReflectorMetrics()
 	registerClientMetrics()
 	prometheus.MustRegister(cniOperationHistogram)

pkg/pinger/metrics.go

@@ -623,7 +623,7 @@ var (
 		})
 )
 
-func init() {
+func InitPingerMetrics() {
 	prometheus.MustRegister(ovsUpGauge)
 	prometheus.MustRegister(ovsDownGauge)
 	prometheus.MustRegister(ovnControllerUpGauge)