fix dialing https server (kubeovn#4324)

Signed-off-by: zhangzujian <[email protected]>

charts/kube-ovn/templates/controller-deploy.yaml

@@ -169,12 +169,14 @@ spec:
             exec:
               command:
                 - /kube-ovn/kube-ovn-controller-healthcheck
+                - --tls={{- .Values.func.SECURE_SERVING }}
             periodSeconds: 3
             timeoutSeconds: 45
           livenessProbe:
             exec:
               command:
                 - /kube-ovn/kube-ovn-controller-healthcheck
+                - --tls={{- .Values.func.SECURE_SERVING }}
             initialDelaySeconds: 300
             periodSeconds: 7
             failureThreshold: 5

cmd/controller_health_check/controller_health_check.go

@@ -1,25 +1,49 @@
 package controller_health_check
 
 import (
-	"net"
+	"flag"
 	"os"
 	"time"
 
+	"github.com/spf13/pflag"
+	"k8s.io/klog/v2"
+
 	"github.com/kubeovn/kube-ovn/pkg/util"
 )
 
 func CmdMain() {
+	tls := pflag.Bool("tls", false, "Whether kube-ovn-controller uses TLS")
+
+	klogFlags := flag.NewFlagSet("klog", flag.ExitOnError)
+	klog.InitFlags(klogFlags)
+
+	// sync the glog and klog flags.
+	pflag.CommandLine.VisitAll(func(f1 *pflag.Flag) {
+		f2 := klogFlags.Lookup(f1.Name)
+		if f2 != nil {
+			value := f1.Value.String()
+			if err := f2.Value.Set(value); err != nil {
+				util.LogFatalAndExit(err, "failed to set pflag")
+			}
+		}
+	})
+
+	pflag.CommandLine.AddGoFlagSet(klogFlags)
+	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
+	pflag.Parse()
+
 	addr := "127.0.0.1:10660"
 	if os.Getenv("ENABLE_BIND_LOCAL_IP") == "true" {
 		addr = util.JoinHostPort(os.Getenv("POD_IP"), 10660)
 	}
 
-	conn, err := net.DialTimeout("tcp", addr, 3*time.Second)
-	if err != nil {
-		util.LogFatalAndExit(err, "failed to probe the socket")
+	if *tls {
+		addr = "tls://" + addr
+	} else {
+		addr = "tcp://" + addr
 	}
-	err = conn.Close()
-	if err != nil {
-		util.LogFatalAndExit(err, "failed to close connection")
+
+	if err := util.DialTCP(addr, time.Second, false); err != nil {
+		util.LogFatalAndExit(err, "failed to probe the socket")
 	}
 }

pkg/util/k8s.go

@@ -2,6 +2,7 @@ package util
 
 import (
 	"context"
+	"crypto/tls"
 	"encoding/json"
 	"fmt"
 	"net"
@@ -18,24 +19,46 @@ import (
 	"k8s.io/klog/v2"
 )
 
-func DialAPIServer(host string) error {
+func DialTCP(host string, timeout time.Duration, verbose bool) error {
 	u, err := url.Parse(host)
 	if err != nil {
 		return fmt.Errorf("failed to parse host %q: %v", host, err)
 	}
 
+	var conn net.Conn
 	address := net.JoinHostPort(u.Hostname(), u.Port())
-	timer := time.NewTimer(3 * time.Second)
+	switch u.Scheme {
+	case "tcp", "http":
+		conn, err = net.DialTimeout("tcp", address, timeout)
+	case "tls", "https":
+		config := &tls.Config{InsecureSkipVerify: true} // #nosec G402
+		conn, err = tls.DialWithDialer(&net.Dialer{Timeout: timeout}, "tcp", address, config)
+	default:
+		return fmt.Errorf("unsupported scheme %q", u.Scheme)
+	}
+
+	if err == nil {
+		if verbose {
+			klog.Infof("succeeded to dial host %q", host)
+		}
+		_ = conn.Close()
+		return nil
+	}
+
+	return fmt.Errorf("timed out dialing host %q", host)
+}
+
+func DialAPIServer(host string) error {
+	interval := 3 * time.Second
+	timer := time.NewTimer(interval)
 	for i := 0; i < 10; i++ {
-		conn, err := net.DialTimeout("tcp", address, 3*time.Second)
+		err := DialTCP(host, interval, true)
 		if err == nil {
-			klog.Infof("succeeded to dial apiserver %q", address)
-			_ = conn.Close()
 			return nil
 		}
-		klog.Warningf("failed to dial apiserver %q: %v", address, err)
+		klog.Warningf("failed to dial apiserver %q: %v", host, err)
 		<-timer.C
-		timer.Reset(3 * time.Second)
+		timer.Reset(interval)
 	}
 
 	return fmt.Errorf("timed out dialing apiserver %q", host)