Add ebgp-multihop function for kube-ovn-speaker (#1601)

Co-authored-by: Edison Meng (孟志慧)-浪潮数据 <mengzhihui01@inspur.com>

pkg/speaker/config.go

@@ -29,6 +29,7 @@ const (
 	DefaultPprofPort                   = 10667
 	DefaultGracefulRestartDeferralTime = 360 * time.Second
 	DefaultGracefulRestartTime         = 90 * time.Second
+	DefaultEbgpMultiHop                = 1
 )
 
 type Configuration struct {
@@ -46,6 +47,7 @@ type Configuration struct {
 	GracefulRestartDeferralTime time.Duration
 	GracefulRestartTime         time.Duration
 	PassiveMode                 bool
+	EbgpMultihopTtl             uint8
 
 	KubeConfigFile string
 	KubeClient     kubernetes.Interface
@@ -71,6 +73,7 @@ func ParseFlags() (*Configuration, error) {
 		argPprofPort                   = pflag.Uint32("pprof-port", DefaultPprofPort, "The port to get profiling data, default: 10667")
 		argKubeConfigFile              = pflag.String("kubeconfig", "", "Path to kubeconfig file with authorization and master location information. If not set use the inCluster token.")
 		argPassiveMode                 = pflag.BoolP("passivemode", "", false, "Set BGP Speaker to passive model,do not actively initiate connections to peers ")
+		argEbgpMultihopTtl             = pflag.Uint8("ebgp-multihop", DefaultEbgpMultiHop, "The TTL value of EBGP peer, default: 1")
 	)
 	klogFlags := flag.NewFlagSet("klog", flag.ExitOnError)
 	klog.InitFlags(klogFlags)
@@ -111,6 +114,7 @@ func ParseFlags() (*Configuration, error) {
 		GracefulRestartDeferralTime: *argGracefulRestartDeferralTime,
 		GracefulRestartTime:         *argDefaultGracefulTime,
 		PassiveMode:                 *argPassiveMode,
+		EbgpMultihopTtl:             *argEbgpMultihopTtl,
 	}
 
 	if config.RouterId == "" {
@@ -213,6 +217,12 @@ func (config *Configuration) initBgpServer() error {
 			PassiveMode: config.PassiveMode,
 		},
 	}
+	if config.EbgpMultihopTtl != DefaultEbgpMultiHop {
+		peer.EbgpMultihop = &api.EbgpMultihop{
+			Enabled:     true,
+			MultihopTtl: uint32(config.EbgpMultihopTtl),
+		}
+	}
 	if config.AuthPassword != "" {
 		peer.Conf.AuthPassword = config.AuthPassword
 	}