Special workaround flag for an EKS bug

awslabs/amazon-eks-ami#341
cloudfoundry-incubator · Sep 27, 2019 · 68d247d · 68d247d
1 parent fb49fba
commit 68d247d
Show file tree

Hide file tree

Showing 4 changed files with 41 additions and 21 deletions.
diff --git a/pkg/bosh/converter/kube_converter.go b/pkg/bosh/converter/kube_converter.go
@@ -92,12 +92,13 @@ func (kc *KubeConverter) Variables(manifestName string, variables []bdm.Variable
 			}
 
 			certRequest := esv1.CertificateRequest{
-				CommonName:       v.Options.CommonName,
-				AlternativeNames: v.Options.AlternativeNames,
-				IsCA:             v.Options.IsCA,
-				SignerType:       v.Options.SignerType,
-				ServiceRef:       v.Options.ServiceRef,
-				Usages:           usages,
+				CommonName:                  v.Options.CommonName,
+				AlternativeNames:            v.Options.AlternativeNames,
+				IsCA:                        v.Options.IsCA,
+				SignerType:                  v.Options.SignerType,
+				ServiceRef:                  v.Options.ServiceRef,
+				ActivateEKSWorkaroundForSAN: v.Options.ActivateEKSWorkaroundForSAN,
+				Usages:                      usages,
 			}
 			if len(certRequest.SignerType) == 0 {
 				certRequest.SignerType = esv1.LocalSigner

diff --git a/pkg/bosh/manifest/manifest.go b/pkg/bosh/manifest/manifest.go
@@ -54,13 +54,14 @@ const (
 
 // VariableOptions from BOSH deployment manifest
 type VariableOptions struct {
-	CommonName       string                  `json:"common_name"`
-	AlternativeNames []string                `json:"alternative_names,omitempty"`
-	IsCA             bool                    `json:"is_ca"`
-	CA               string                  `json:"ca,omitempty"`
-	ExtendedKeyUsage []AuthType              `json:"extended_key_usage,omitempty"`
-	SignerType       string                  `json:"signer_type,omitempty"`
-	ServiceRef       []esv1.ServiceReference `json:"serviceRef,omitempty"`
+	CommonName                  string                  `json:"common_name"`
+	AlternativeNames            []string                `json:"alternative_names,omitempty"`
+	IsCA                        bool                    `json:"is_ca"`
+	CA                          string                  `json:"ca,omitempty"`
+	ExtendedKeyUsage            []AuthType              `json:"extended_key_usage,omitempty"`
+	SignerType                  string                  `json:"signer_type,omitempty"`
+	ServiceRef                  []esv1.ServiceReference `json:"serviceRef,omitempty"`
+	ActivateEKSWorkaroundForSAN bool                    `json:"activateEKSWorkaroundForSAN,omitempty"`
 }
 
 // Variable from BOSH deployment manifest

diff --git a/pkg/kube/apis/extendedsecret/v1alpha1/types.go b/pkg/kube/apis/extendedsecret/v1alpha1/types.go
@@ -62,14 +62,15 @@ type ServiceReference struct {
 
 // CertificateRequest specifies the details for the certificate generation
 type CertificateRequest struct {
-	CommonName       string             `json:"commonName"`
-	AlternativeNames []string           `json:"alternativeNames"`
-	IsCA             bool               `json:"isCA"`
-	CARef            SecretReference    `json:"CARef"`
-	CAKeyRef         SecretReference    `json:"CAKeyRef"`
-	SignerType       SignerType         `json:"signerType,omitempty"`
-	Usages           []certv1.KeyUsage  `json:"usages,omitempty"`
-	ServiceRef       []ServiceReference `json:"serviceRef,omitempty"`
+	CommonName                  string             `json:"commonName"`
+	AlternativeNames            []string           `json:"alternativeNames"`
+	IsCA                        bool               `json:"isCA"`
+	CARef                       SecretReference    `json:"CARef"`
+	CAKeyRef                    SecretReference    `json:"CAKeyRef"`
+	SignerType                  SignerType         `json:"signerType,omitempty"`
+	Usages                      []certv1.KeyUsage  `json:"usages,omitempty"`
+	ServiceRef                  []ServiceReference `json:"serviceRef,omitempty"`
+	ActivateEKSWorkaroundForSAN bool               `json:"activateEKSWorkaroundForSAN,omitempty"`
 }
 
 // Request specifies details for the secret generation

diff --git a/pkg/kube/controllers/extendedsecret/extendedsecret_reconciler.go b/pkg/kube/controllers/extendedsecret/extendedsecret_reconciler.go
@@ -233,6 +233,9 @@ func (r *ReconcileExtendedSecret) createSSHSecret(ctx context.Context, instance
 }
 
 func (r *ReconcileExtendedSecret) createCertificateSecret(ctx context.Context, instance *esv1.ExtendedSecret) error {
+
+	serviceIPForEKSWorkaround := ""
+
 	for _, serviceRef := range instance.Spec.Request.CertificateRequest.ServiceRef {
 		service := &corev1.Service{}
 
@@ -242,6 +245,10 @@ func (r *ReconcileExtendedSecret) createCertificateSecret(ctx context.Context, i
 			return errors.Wrapf(err, "Failed to get service reference '%s' for ExtendedSecret '%s'", serviceRef.Name, instance.Name)
 		}
 
+		if serviceIPForEKSWorkaround == "" {
+			serviceIPForEKSWorkaround = service.Spec.ClusterIP
+		}
+
 		instance.Spec.Request.CertificateRequest.AlternativeNames = append(append(
 			instance.Spec.Request.CertificateRequest.AlternativeNames,
 			service.Name,
@@ -265,6 +272,16 @@ func (r *ReconcileExtendedSecret) createCertificateSecret(ctx context.Context, i
 
 	switch instance.Spec.Request.CertificateRequest.SignerType {
 	case esv1.ClusterSigner:
+		if instance.Spec.Request.CertificateRequest.ActivateEKSWorkaroundForSAN {
+			if serviceIPForEKSWorkaround == "" {
+				return errors.Errorf("can't activate EKS workaround for ExtendedSecret '%s/%s'; couldn't find a ClusterIP for any service reference", instance.Namespace, instance.Name)
+			}
+
+			ctxlog.Infof(ctx, "Activating EKS workaround for ExtendedSecret '%s/%s'. Using IP '%s' as a common name. See 'https://github.com/awslabs/amazon-eks-ami/issues/341' for more details.", instance.Namespace, instance.Name, serviceIPForEKSWorkaround)
+
+			generationRequest.CommonName = serviceIPForEKSWorkaround
+		}
+
 		ctxlog.Info(ctx, "Generating certificate signing request and its key")
 		csr, key, err := r.generator.GenerateCertificateSigningRequest(generationRequest)
 		if err != nil {