Revert "feat: add support for BGP unnumbered peers (#1506)"

This reverts commit 7d33c747ff.

Signed-off-by: Marcel Fest <marcel.fest@telekom.de>

pkg/bgp/peers.go

@@ -13,7 +13,6 @@ import (
 	api "github.com/osrg/gobgp/v3/api"
 
 	"github.com/kube-vip/kube-vip/pkg/utils"
-	"github.com/osrg/gobgp/v3/pkg/config/oc"
 	"github.com/osrg/gobgp/v3/pkg/server"
 	"google.golang.org/protobuf/types/known/anypb"
 )
@@ -22,10 +21,9 @@ import (
 func (b *Server) AddPeer(ctx context.Context, peer kubevip.BGPPeer) (err error) {
 	p := &api.Peer{
 		Conf: &api.PeerConf{
-			NeighborAddress:   peer.Address,
-			PeerAsn:           peer.AS,
-			NeighborInterface: peer.Interface,
-			AuthPassword:      peer.Password,
+			NeighborAddress: peer.Address,
+			PeerAsn:         peer.AS,
+			AuthPassword:    peer.Password,
 		},
 
 		Timers: &api.Timers{
@@ -49,17 +47,6 @@ func (b *Server) AddPeer(ctx context.Context, peer kubevip.BGPPeer) (err error)
 		},
 	}
 
-	if peer.Interface != "" {
-		neighborAddress, err := oc.GetIPv6LinkLocalNeighborAddress(peer.Interface)
-		if err != nil {
-			return fmt.Errorf("failed to get link-local address of interface %s: %w", peer.Interface, err)
-		}
-
-		p.State = &api.PeerState{
-			NeighborAddress: neighborAddress,
-		}
-	}
-
 	if b.c.MpbgpNexthop != "" {
 		p.AfiSafis = []*api.AfiSafi{
 			{

pkg/bgp/peers_test.go

@@ -1,8 +1,10 @@
-package kubevip
+package bgp
 
 import (
 	"reflect"
 	"testing"
+
+	"github.com/kube-vip/kube-vip/pkg/kubevip"
 )
 
 func TestParseBGPPeerConfig(t *testing.T) {
@@ -12,13 +14,13 @@ func TestParseBGPPeerConfig(t *testing.T) {
 	tests := []struct {
 		name         string
 		args         args
-		wantBgpPeers []BGPPeer
+		wantBgpPeers []kubevip.BGPPeer
 		wantErr      bool
 	}{
 		{
 			name: "IPv4, default port",
 			args: args{config: "192.168.0.10:65000::false,192.168.0.11:65000::false"},
-			wantBgpPeers: []BGPPeer{
+			wantBgpPeers: []kubevip.BGPPeer{
 				{Address: "192.168.0.10", Port: 179, AS: 65000, MultiHop: false},
 				{Address: "192.168.0.11", Port: 179, AS: 65000, MultiHop: false},
 			},
@@ -26,7 +28,7 @@ func TestParseBGPPeerConfig(t *testing.T) {
 		{
 			name: "IPv4, different port",
 			args: args{config: "192.168.0.10:65000::false:180,192.168.0.11:65000::false:190"},
-			wantBgpPeers: []BGPPeer{
+			wantBgpPeers: []kubevip.BGPPeer{
 				{Address: "192.168.0.10", Port: 180, AS: 65000, MultiHop: false},
 				{Address: "192.168.0.11", Port: 190, AS: 65000, MultiHop: false},
 			},
@@ -34,22 +36,14 @@ func TestParseBGPPeerConfig(t *testing.T) {
 		{
 			name: "IPv6, multi-protocol",
 			args: args{config: "[fd00:1111:2222:3333:c7d9:7235:6bf7:5d52]:65501::false/mpbgp_nexthop=auto_sourceif"},
-			wantBgpPeers: []BGPPeer{
+			wantBgpPeers: []kubevip.BGPPeer{
 				{Address: "fd00:1111:2222:3333:c7d9:7235:6bf7:5d52", Port: 179, AS: 65501, MultiHop: false, MpbgpNexthop: "auto_sourceif"},
 			},
 		},
-		{
-			name: "Unnumbered",
-			args: args{config: "unnumbered:eth0,unnumbered:eth1:65000::true/mpbgp_nexthop=auto_sourceif"},
-			wantBgpPeers: []BGPPeer{
-				{Interface: "eth0", MultiHop: false},
-				{Interface: "eth1", AS: 65000, MultiHop: true, MpbgpNexthop: "auto_sourceif"},
-			},
-		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			gotBgpPeers, err := ParseBGPPeerConfig(tt.args.config)
+			gotBgpPeers, err := kubevip.ParseBGPPeerConfig(tt.args.config)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("ParseBGPPeerConfig() error = %v, wantErr %v", err, tt.wantErr)
 				return

pkg/kubevip/config_bgp.go

@@ -16,7 +16,6 @@ import (
 type BGPPeer struct {
 	Address      string
 	Port         uint16
-	Interface    string
 	AS           uint32
 	Password     string
 	MultiHop     bool
@@ -66,7 +65,6 @@ func ParseBGPPeerConfig(config string) (bgpPeers []BGPPeer, err error) {
 			continue
 		}
 		isV6Peer := peerStr[0] == '['
-		isUnnumberedPeer := strings.HasPrefix(peerStr, "unnumbered:")
 
 		address := ""
 		if isV6Peer {
@@ -76,29 +74,20 @@ func ParseBGPPeerConfig(config string) (bgpPeers []BGPPeer, err error) {
 			}
 			address = peerStr[1:addressEndPos]
 			peerStr = peerStr[addressEndPos+1:]
-		} else if isUnnumberedPeer {
-			unnumberedEndPos := strings.IndexByte(peerStr, ':')
-			peerStr = peerStr[unnumberedEndPos+1:]
 		}
 
 		peer := strings.Split(peerStr, ":")
-		if len(peer) < 2 && !isUnnumberedPeer {
+		if len(peer) < 2 {
 			return nil, fmt.Errorf("mandatory peering params <host>:<AS> incomplete")
 		}
 
-		iface := ""
-		if isUnnumberedPeer {
-			iface = peer[0]
-		} else if !isV6Peer {
+		if !isV6Peer {
 			address = peer[0]
 		}
 
-		var ASNumber uint64
-		if len(peer) >= 2 {
-			ASNumber, err = strconv.ParseUint(peer[1], 10, 32)
-			if err != nil {
-				return nil, fmt.Errorf("BGP Peer AS format error [%s]", peer[1])
-			}
+		ASNumber, err := strconv.ParseUint(peer[1], 10, 32)
+		if err != nil {
+			return nil, fmt.Errorf("BGP Peer AS format error [%s]", peer[1])
 		}
 
 		password := ""
@@ -118,9 +107,9 @@ func ParseBGPPeerConfig(config string) (bgpPeers []BGPPeer, err error) {
 		if len(peer) >= 5 {
 			port, err = strconv.ParseUint(peer[4], 10, 16)
 			if err != nil {
-				return nil, fmt.Errorf("BGP Peer Port format error [%s]", peer[4])
+				return nil, fmt.Errorf("BGP Peer AS format error [%s]", peer[1])
 			}
-		} else if !isUnnumberedPeer {
+		} else {
 			port = 179
 		}
 
@@ -144,11 +133,9 @@ func ParseBGPPeerConfig(config string) (bgpPeers []BGPPeer, err error) {
 		}
 
 		peerConfig := BGPPeer{
-			Address: address,
-			//nolint:gosec // previously parsed into uint32
+			Address:      address,
 			AS:           uint32(ASNumber),
 			Port:         uint16(port),
-			Interface:    iface,
 			Password:     password,
 			MultiHop:     multiHop,
 			MpbgpNexthop: mpbgpNexthop,

testing/e2e/e2e_bgp_ds_test.go

@@ -229,51 +229,5 @@ var _ = Describe("kube-vip BGP when deployed as a regular pod", Ordered, func()
 			})
 
 		})
-
-		Describe("kube-vip IPv6 BGP unnumbered functionality", Ordered, func() {
-			var (
-				client      kubernetes.Interface
-				clusterName string
-				tempDirPath string
-			)
-
-			BeforeAll(func() {
-				networking := &kindconfigv1alpha4.Networking{
-					IPFamily: kindconfigv1alpha4.IPv6Family, 
-				}
-
-				var err error
-				tempDirPath, err = os.MkdirTemp(tempDirPathRoot, "kube-vip-test-bgp-v6")
-				Expect(err).NotTo(HaveOccurred())
-
-				clusterName, client, _ = prepareClusterForDS(tempDirPath, "bgp-ds-v6", imagePath, k8sImagePath,
-					logger, networking, 1, nil)
-			})
-
-			AfterAll(func() {
-				Eventually(func() error {
-					return e2e.GetLogs(ctx, client, tempDirPath)
-				}, "60s", "5s").Should(Succeed())
-				cleanupCluster(clusterName, ConfigMtx, logger)
-			})
-
-			It(clusterName+" exits gracefully when unnumbered BGP peers are configured", func() {
-				manifestValues := &e2e.KubevipManifestValues{
-					Mode:                 Mode,
-					ControlPlaneEnable:   "true",
-					VipElectionEnable:    "false",
-					ImagePath:            imagePath,
-					ConfigPath:           configPath,
-					SvcEnable:            "true",
-					SvcElectionEnable:    "false",
-					EnableEndpointslices: "true",
-					EnableNodeLabeling:   "false",
-					BGPPeers:             "unnumbered:eth0",
-					BGPAS:                2,
-				}
-
-				testDS(ctx, manifestValues, client, utils.IPv6Family, clusterName)
-			})
-		})
 	}
 })