fix: account for tls termination in exposed port validation (#5549)

Addresses #5536 

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internal/pkg/manifest/validate.go

@@ -2226,6 +2226,7 @@ func validateAndPopulateNLBListenerPorts(listener NetworkLoadBalancerListener, p
 	if err != nil {
 		return err
 	}
+
 	port, err := strconv.ParseUint(aws.StringValue(nlbReceiverPort), 10, 16)
 	if err != nil {
 		return err
@@ -2242,6 +2243,11 @@ func validateAndPopulateNLBListenerPorts(listener NetworkLoadBalancerListener, p
 		targetProtocol = strings.ToUpper(aws.StringValue(nlbProtocol))
 	}
 
+	// Handle TLS termination of container exposed port protocol
+	if targetProtocol == TLS {
+		targetProtocol = TCP
+	}
+
 	// Prefer `nlb.target_container`, then existing exposed port mapping, then fallback on name of main container
 	targetContainer := mainContainerName
 	if existingContainerNameAndProtocol, ok := portExposedTo[targetPort]; ok {
@@ -2256,6 +2262,7 @@ func validateAndPopulateNLBListenerPorts(listener NetworkLoadBalancerListener, p
 
 func validateAndPopulateExposedPortMapping(portExposedTo map[uint16]containerNameAndProtocol, targetPort uint16, targetProtocol string, targetContainer string) error {
 	exposedContainerAndProtocol, alreadyExposed := portExposedTo[targetPort]
+	targetProtocol = strings.ToUpper(targetProtocol)
 
 	// Port is not associated with container and protocol, populate map
 	if !alreadyExposed {

internal/pkg/manifest/validate_test.go

@@ -4196,7 +4196,25 @@ func TestValidateExposedPorts(t *testing.T) {
 			},
 			wanted: nil,
 		},
-		"should not error out when nlb target_port is same as that of sidecar container port but sidecar uses non default protocol": {
+		"should not error out when tls is terminated exposing a tcp port": {
+			in: validateExposedPortsOpts{
+				mainContainerName: "mockMainContainer",
+				mainContainerPort: aws.Uint16(8080),
+				sidecarConfig: map[string]*SidecarConfig{
+					"foo": {
+						Port: aws.String("80/tcp"),
+					},
+				},
+				nlb: &NetworkLoadBalancerConfiguration{
+					Listener: NetworkLoadBalancerListener{
+						Port:       aws.String("8080/tls"),
+						TargetPort: aws.Int(80),
+					},
+				},
+			},
+			wanted: nil,
+		},
+		"should return an error when nlb target_port is same as that of sidecar container port but sidecar uses non default protocol": {
 			in: validateExposedPortsOpts{
 				mainContainerName: "mockMainContainer",
 				mainContainerPort: aws.Uint16(8080),
@@ -4212,7 +4230,7 @@ func TestValidateExposedPorts(t *testing.T) {
 					},
 				},
 			},
-			wanted: fmt.Errorf(`validate "nlb": container "foo" is exposing the same port 80 with protocol TCP and udp`),
+			wanted: fmt.Errorf(`validate "nlb": container "foo" is exposing the same port 80 with protocol TCP and UDP`),
 		},
 		"should return an error if alb target_port points to one sidecar container port and target_container points to another sidecar container": {
 			in: validateExposedPortsOpts{