Split annotation in two

pkg/cloudprovider/providers/aws/aws.go

@@ -69,15 +69,20 @@ const TagNameSubnetPublicELB = "kubernetes.io/role/elb"
 // This lets us define more advanced semantics in future.
 const ServiceAnnotationLoadBalancerInternal = "service.beta.kubernetes.io/aws-load-balancer-internal"
 
-// Service annotation requesting a secure listener. Value is [InstanceProtocol=]CertARN
-// If InstanceProtocol is `http` (default) or `https`, an HTTPS listener that terminates the connection and parses headers is created.
-// If it is set to `ssl` or `tcp`, a "raw" SSL listener is used.
+// Service annotation requesting a secure listener. Value is a valid certificate ARN.
 // For more, see http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/elb-listener-config.html
 // CertARN is an IAM or CM certificate ARN, e.g. arn:aws:acm:us-east-1:123456789012:certificate/12345678-1234-1234-1234-123456789012
-const ServiceAnnotationLoadBalancerCertificate = "service.beta.kubernetes.io/aws-load-balancer-certarn"
+const ServiceAnnotationLoadBalancerCertificate = "service.beta.kubernetes.io/aws-load-balancer-ssl-cert"
 
-// Maps from instance protocol to ELB protocol
-var protocolMapping = map[string]string{
+// Service annotation specifying the protocol spoken by the backend (pod) behind a secure listener.
+// Only inspected when `aws-load-balancer-ssl-cert` is used.
+// If `http` (default) or `https`, an HTTPS listener that terminates the connection and parses headers is created.
+// If set to `ssl` or `tcp`, a "raw" SSL listener is used.
+
+const ServiceAnnotationLoadBalancerBEProtocol = "service.beta.kubernetes.io/aws-load-balancer-backend-protocol"
+
+// Maps from backend protocol to ELB protocol
+var backendProtocolMapping = map[string]string{
 	"https": "https",
 	"http":  "https",
 	"ssl":   "ssl",
@@ -2125,19 +2130,15 @@ func getListener(port api.ServicePort, annotations map[string]string) (*elb.List
 	listener.LoadBalancerPort = &loadBalancerPort
 	certID := annotations[ServiceAnnotationLoadBalancerCertificate]
 	if certID != "" {
-		parts := strings.Split(certID, "=")
-		if len(parts) == 1 {
+		instanceProtocol = annotations[ServiceAnnotationLoadBalancerBEProtocol]
+		if instanceProtocol == "" {
 			protocol = "https"
 			instanceProtocol = "http"
-		} else if len(parts) == 2 {
-			instanceProtocol = strings.ToLower(parts[0])
-			protocol = protocolMapping[instanceProtocol]
-			if protocol == "" {
-				return nil, fmt.Errorf("Invalid protocol %s in %s", instanceProtocol, certID)
-			}
-			certID = parts[1]
 		} else {
-			return nil, fmt.Errorf("Invalid certificate annotation %s", certID)
+			protocol = backendProtocolMapping[instanceProtocol]
+			if protocol == "" {
+				return nil, fmt.Errorf("Invalid backend protocol %s in %s", instanceProtocol, certID)
+			}
 		}
 		listener.SSLCertificateId = &certID
 	}

pkg/cloudprovider/providers/aws/aws_test.go

@@ -1204,54 +1204,54 @@ func TestGetListener(t *testing.T) {
 	tests := []struct {
 		name string
 
-		lbPort       int64
-		instancePort int64
-		annotation   string
+		lbPort                    int64
+		instancePort              int64
+		backendProtocolAnnotation string
+		certAnnotation            string
 
 		expectError      bool
 		lbProtocol       string
 		instanceProtocol string
 		certID           string
-		//listener    *elb.Listener
 	}{
 		{
-			"No annotation, passthrough",
-			80, 8000, "",
+			"No cert or BE protocol annotation, passthrough",
+			80, 8000, "", "",
 			false, "tcp", "tcp", "",
 		},
 		{
-			"Invalid cert annotation, no protocol before equal sign",
-			443, 8000, "=foo",
+			"BE protocol without cert annotation, passthrough",
+			443, 8001, "https", "",
+			false, "tcp", "tcp", "",
+		},
+		{
+			"Invalid cert annotation, bogus backend protocol",
+			443, 8002, "bacon", "foo",
 			true, "tcp", "tcp", "cert",
 		},
 		{
-			"Invalid cert annotation, bogus protocol before equal sign",
-			443, 8000, "bacon=foo",
-			true, "tcp", "tcp", "cert",
-		},
-		{
-			"Invalid cert annotation, too many equal signs",
-			443, 8000, "==",
+			"Invalid cert annotation, protocol followed by equal sign",
+			443, 8003, "http=", "=",
 			true, "tcp", "tcp", "cert",
 		},
 		{
 			"HTTPS->HTTPS",
-			443, 8000, "https=cert",
+			443, 8004, "https", "cert",
 			false, "https", "https", "cert",
 		},
 		{
 			"HTTPS->HTTP",
-			443, 8000, "http=cert",
+			443, 8005, "http", "cert",
 			false, "https", "http", "cert",
 		},
 		{
 			"SSL->SSL",
-			443, 8000, "ssl=cert",
+			443, 8006, "ssl", "cert",
 			false, "ssl", "ssl", "cert",
 		},
 		{
 			"SSL->TCP",
-			443, 8000, "tcp=cert",
+			443, 8007, "tcp", "cert",
 			false, "ssl", "tcp", "cert",
 		},
 	}
@@ -1259,8 +1259,11 @@ func TestGetListener(t *testing.T) {
 	for _, test := range tests {
 		t.Logf("Running test case %s", test.name)
 		annotations := make(map[string]string)
-		if test.annotation != "" {
-			annotations[ServiceAnnotationLoadBalancerCertificate] = test.annotation
+		if test.backendProtocolAnnotation != "" {
+			annotations[ServiceAnnotationLoadBalancerBEProtocol] = test.backendProtocolAnnotation
+		}
+		if test.certAnnotation != "" {
+			annotations[ServiceAnnotationLoadBalancerCertificate] = test.certAnnotation
 		}
 		l, err := getListener(api.ServicePort{
 			NodePort: int(test.instancePort),
@@ -1287,7 +1290,7 @@ func TestGetListener(t *testing.T) {
 					SSLCertificateId: cert,
 				}
 				if !reflect.DeepEqual(l, expected) {
-					t.Errorf("Incorrect listener (%v vs %v) for case: %s",
+					t.Errorf("Incorrect listener (%v vs expected %v) for case: %s",
 						l, expected, test.name)
 				}
 			}