change source ip address from 169.254.1.1 to hostIP

Signed-off-by: bingshen.wbs <bingshen.wbs@alibaba-inc.com>

Author: BSWANG

plugin/datapath/exclusive_eni_linux.go

@@ -274,15 +274,10 @@ func generateVeth1Cfg(cfg *types.SetupConfig, link netlink.Link, peerMAC net.Har
 }
 
 func generateHostSlaveCfg(cfg *types.SetupConfig, link netlink.Link) *nic.Conf {
-	var addrs []*netlink.Addr
 	var routes []*netlink.Route
 	var sysctl map[string][]string
 
 	if cfg.ContainerIPNet.IPv4 != nil {
-		addrs = append(addrs, &netlink.Addr{
-			IPNet: LinkIPNet,
-		})
-
 		// add route to container
 		routes = append(routes, &netlink.Route{
 			LinkIndex: link.Attrs().Index,
@@ -291,10 +286,6 @@ func generateHostSlaveCfg(cfg *types.SetupConfig, link netlink.Link) *nic.Conf {
 		})
 	}
 	if cfg.ContainerIPNet.IPv6 != nil {
-		addrs = append(addrs, &netlink.Addr{
-			IPNet: LinkIPNetv6,
-		})
-
 		routes = append(routes, &netlink.Route{
 			LinkIndex: link.Attrs().Index,
 			Scope:     netlink.SCOPE_LINK,
@@ -306,7 +297,6 @@ func generateHostSlaveCfg(cfg *types.SetupConfig, link netlink.Link) *nic.Conf {
 	contCfg := &nic.Conf{
 		IfName: cfg.HostVETHName,
 		MTU:    cfg.MTU,
-		Addrs:  addrs,
 		Routes: routes,
 		SysCtl: sysctl,
 	}

plugin/datapath/exclusive_eni_linux_test.go

@@ -133,13 +133,22 @@ func TestDataPathExclusiveENI(t *testing.T) {
 	assert.Equal(t, cfg.MTU, hostVETHLink.Attrs().MTU)
 	assert.True(t, hostVETHLink.Attrs().Flags&net.FlagUp != 0)
 
-	// ip 169.254.1.1/32
-	ok, err = FindIP(hostVETHLink, &terwayTypes.IPNetSet{
-		IPv4: LinkIPNet,
-		IPv6: LinkIPNetv6,
-	})
+	// no explicit IP assignment - should auto borrow IP
+	addrs, err := netlink.AddrList(hostVETHLink, netlink.FAMILY_ALL)
 	assert.NoError(t, err)
-	assert.True(t, ok)
+	// Only link-local or auto-assigned addresses, no explicit IPv4/IPv6 from cfg.HostIPSet
+	for _, addr := range addrs {
+		if addr.IP.IsLinkLocalUnicast() || addr.IP.IsLinkLocalMulticast() {
+			continue
+		}
+		// Should not have explicit IPs assigned
+		if cfg.HostIPSet != nil && cfg.HostIPSet.IPv4 != nil {
+			assert.NotEqual(t, cfg.HostIPSet.IPv4.IP.String(), addr.IP.String())
+		}
+		if cfg.HostIPSet != nil && cfg.HostIPSet.IPv6 != nil {
+			assert.NotEqual(t, cfg.HostIPSet.IPv6.IP.String(), addr.IP.String())
+		}
+	}
 
 	// route 169.10.0.10 dev hostVETH
 	routes, err := netlink.RouteListFiltered(netlink.FAMILY_V4, &netlink.Route{
@@ -347,13 +356,22 @@ func TestDataPathExclusiveENIMultiNetwork(t *testing.T) {
 	assert.Equal(t, cfg.MTU, hostVETHLink.Attrs().MTU)
 	assert.True(t, hostVETHLink.Attrs().Flags&net.FlagUp != 0)
 
-	// ip 169.254.1.1/32
-	ok, err = FindIP(hostVETHLink, &terwayTypes.IPNetSet{
-		IPv4: LinkIPNet,
-		IPv6: LinkIPNetv6,
-	})
+	// no explicit IP assignment - should auto borrow IP
+	addrs, err := netlink.AddrList(hostVETHLink, netlink.FAMILY_ALL)
 	assert.NoError(t, err)
-	assert.True(t, ok)
+	// Only link-local or auto-assigned addresses, no explicit IPv4/IPv6 from cfg.HostIPSet
+	for _, addr := range addrs {
+		if addr.IP.IsLinkLocalUnicast() || addr.IP.IsLinkLocalMulticast() {
+			continue
+		}
+		// Should not have explicit IPs assigned
+		if cfg.HostIPSet != nil && cfg.HostIPSet.IPv4 != nil {
+			assert.NotEqual(t, cfg.HostIPSet.IPv4.IP.String(), addr.IP.String())
+		}
+		if cfg.HostIPSet != nil && cfg.HostIPSet.IPv6 != nil {
+			assert.NotEqual(t, cfg.HostIPSet.IPv6.IP.String(), addr.IP.String())
+		}
+	}
 
 	// route 169.10.0.10 dev hostVETH
 	routes, err := netlink.RouteListFiltered(netlink.FAMILY_V4, &netlink.Route{