Add a debug log

plugins/vpc-eni/e2eTests/e2e_test.go

@@ -109,9 +109,10 @@ func TestAddDel(t *testing.T) {
 			// Construct args to invoke the CNI plugin with
 			execInvokeArgs := &invoke.Args{
 				Command:     "ADD",
-				ContainerID: containerID, NetNS: targetNS.Path(),
-				IfName: ifName,
-				Path:   os.Getenv("CNI_PATH"),
+				ContainerID: containerID,
+				NetNS:       targetNS.Path(),
+				IfName:      ifName,
+				Path:        os.Getenv("CNI_PATH"),
 			}
 			netConfENIName := ""
 			if tc.shouldPopulateENIName {

plugins/vpc-eni/network/network_linux.go

@@ -15,6 +15,7 @@ package network
 
 import (
 	"fmt"
+	"net"
 
 	"github.com/aws/amazon-vpc-cni-plugins/network/imds"
 	"github.com/aws/amazon-vpc-cni-plugins/network/netns"
@@ -49,6 +50,11 @@ func (nb *NetBuilder) FindOrCreateEndpoint(nw *Network, ep *Endpoint) error {
 	}
 
 	eni := nw.ENI
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return err
+	}
+	log.Info("Before AttachToLink call", interfaces)
 	err = eni.AttachToLink()
 	if err != nil {
 		log.Errorf("Failed to find ENI %s: %v", eni, err)

plugins/vpc-eni/plugin/commands.go

@@ -14,6 +14,8 @@
 package plugin
 
 import (
+	"net"
+
 	"github.com/aws/amazon-vpc-cni-plugins/network/eni"
 	"github.com/aws/amazon-vpc-cni-plugins/plugins/vpc-eni/config"
 	"github.com/aws/amazon-vpc-cni-plugins/plugins/vpc-eni/network"
@@ -26,6 +28,12 @@ import (
 
 // Add is the CNI ADD command handler.
 func (plugin *Plugin) Add(args *cniSkel.CmdArgs) error {
+	interfaces, err := net.Interfaces()
+	if err != nil {
+		return err
+	}
+	log.Info("Beginning add command", interfaces)
+
 	// Parse network configuration.
 	netConfig, err := config.New(args)
 	if err != nil {
@@ -61,12 +69,24 @@ func (plugin *Plugin) Add(args *cniSkel.CmdArgs) error {
 		UseExisting:         netConfig.UseExistingNetwork,
 	}
 
+	interfaces, err = net.Interfaces()
+	if err != nil {
+		return err
+	}
+	log.Info("Before FindOrCreateNetwork call", interfaces)
+
 	err = nb.FindOrCreateNetwork(&nw)
 	if err != nil {
 		log.Errorf("Failed to create network: %v.", err)
 		return err
 	}
 
+	interfaces, err = net.Interfaces()
+	if err != nil {
+		return err
+	}
+	log.Info("After FindOrCreateNetwork call", interfaces)
+
 	// Find or create the container endpoint on the network.
 	ep := network.Endpoint{
 		ContainerID: args.ContainerID,
@@ -78,6 +98,12 @@ func (plugin *Plugin) Add(args *cniSkel.CmdArgs) error {
 		BlockIMDS:   netConfig.BlockIMDS,
 	}
 
+	interfaces, err = net.Interfaces()
+	if err != nil {
+		return err
+	}
+	log.Info("Before FindOrCreateEndpoint call", interfaces)
+
 	err = nb.FindOrCreateEndpoint(&nw, &ep)
 	if err != nil {
 		log.Errorf("Failed to create endpoint: %v.", err)