[WIP] Initial implementation of ACM certificate for API server ELB

cmd/kops/create_cluster.go

@@ -123,6 +123,9 @@ type CreateClusterOptions struct {
 	// Specify API loadbalancer as public or internal
 	APILoadBalancerType string
 
+	// Specify the SSL certificate to use for the API loadbalancer. Currently only supported in AWS.
+	APISSLCertificate string
+
 	// Allow custom public master name
 	MasterPublicName string
 
@@ -327,6 +330,7 @@ func NewCmdCreateCluster(f *util.Factory, out io.Writer) *cobra.Command {
 	cmd.Flags().StringVar(&options.NodeTenancy, "node-tenancy", options.NodeTenancy, "The tenancy of the node group on AWS. Can be either default or dedicated.")
 
 	cmd.Flags().StringVar(&options.APILoadBalancerType, "api-loadbalancer-type", options.APILoadBalancerType, "Sets the API loadbalancer type to either 'public' or 'internal'")
+	cmd.Flags().StringVar(&options.APISSLCertificate, "api-ssl-certificate", options.APISSLCertificate, "Currently only supported in AWS. Sets the ARN of the SSL Certificate to use for the API server loadbalancer.")
 
 	// Allow custom public master name
 	cmd.Flags().StringVar(&options.MasterPublicName, "master-public-name", options.MasterPublicName, "Sets the public master public name")
@@ -1052,6 +1056,10 @@ func RunCreateCluster(f *util.Factory, out io.Writer, c *CreateClusterOptions) e
 		}
 	}
 
+	if c.APISSLCertificate != "" {
+		cluster.Spec.API.LoadBalancer.SSLCertificate = c.APISSLCertificate
+	}
+
 	// Use Strict IAM policy and allow AWS ECR by default when creating a new cluster
 	cluster.Spec.IAM = &api.IAMSpec{
 		AllowContainerRegistry: true,

docs/cli/kops_create_cluster.md

@@ -66,6 +66,7 @@ kops create cluster [flags]
 ```
       --admin-access strings             Restrict API access to this CIDR.  If not set, access will not be restricted by IP. (default [0.0.0.0/0])
       --api-loadbalancer-type string     Sets the API loadbalancer type to either 'public' or 'internal'
+      --api-ssl-certificate string       Currently only supported in AWS. Sets the ARN of the SSL Certificate to use for the API server loadbalancer.
       --associate-public-ip              Specify --associate-public-ip=[true|false] to enable/disable association of public IP for master ASG and nodes. Default is 'true'.
       --authorization string             Authorization mode to use: AlwaysAllow or RBAC (default "RBAC")
       --bastion                          Pass the --bastion flag to enable a bastion instance group. Only applies to private topology.

pkg/apis/kops/cluster.go

@@ -282,6 +282,7 @@ type LoadBalancerAccessSpec struct {
 	Type                     LoadBalancerType `json:"type,omitempty"`
 	IdleTimeoutSeconds       *int64           `json:"idleTimeoutSeconds,omitempty"`
 	AdditionalSecurityGroups []string         `json:"additionalSecurityGroups,omitempty"`
+	SSLCertificate           string           `json:"sslCertificate,omitempty"`
 }
 
 // KubeDNSConfig defines the kube dns configuration

pkg/apis/kops/v1alpha1/cluster.go

@@ -281,6 +281,7 @@ type LoadBalancerAccessSpec struct {
 	Type                     LoadBalancerType `json:"type,omitempty"`
 	IdleTimeoutSeconds       *int64           `json:"idleTimeoutSeconds,omitempty"`
 	AdditionalSecurityGroups []string         `json:"additionalSecurityGroups,omitempty"`
+	SSLCertificate           string           `json:"sslCertificate,omitempty"`
 }
 
 // KubeDNSConfig defines the kube dns configuration

pkg/apis/kops/v1alpha2/cluster.go

@@ -282,6 +282,7 @@ type LoadBalancerAccessSpec struct {
 	Type                     LoadBalancerType `json:"type,omitempty"`
 	IdleTimeoutSeconds       *int64           `json:"idleTimeoutSeconds,omitempty"`
 	AdditionalSecurityGroups []string         `json:"additionalSecurityGroups,omitempty"`
+	SSLCertificate           string           `json:"sslCertificate,omitempty"`
 }
 
 type KubeDNSConfig struct {

pkg/client/simple/vfsclientset/commonvfs.go

@@ -31,7 +31,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/kops/pkg/acls"
-	kops "k8s.io/kops/pkg/apis/kops"
+	"k8s.io/kops/pkg/apis/kops"
 	"k8s.io/kops/pkg/apis/kops/v1alpha2"
 	"k8s.io/kops/pkg/kopscodecs"
 	"k8s.io/kops/util/pkg/vfs"

pkg/kubeconfig/create_kubecfg.go

@@ -85,7 +85,8 @@ func BuildKubecfg(cluster *kops.Cluster, keyStore fi.Keystore, secretStore fi.Se
 
 	b.Context = clusterName
 
-	{
+	// add the CA Cert to the kubeconfig only if we didn't specify a SSL cert for the LB
+	if cluster.Spec.API.LoadBalancer.SSLCertificate == "" {
 		cert, _, _, err := keyStore.FindKeypair(fi.CertificateId_CA)
 		if err != nil {
 			return nil, fmt.Errorf("error fetching CA keypair: %v", err)

pkg/model/awsmodel/api_loadbalancer.go

@@ -102,6 +102,14 @@ func (b *APILoadBalancerBuilder) Build(c *fi.ModelBuilderContext) error {
 			idleTimeout = time.Second * time.Duration(*lbSpec.IdleTimeoutSeconds)
 		}
 
+		listeners := map[string]*awstasks.LoadBalancerListener{
+			"443": {InstancePort: 443},
+		}
+
+		if lbSpec.SSLCertificate != "" {
+			listeners["443"] = &awstasks.LoadBalancerListener{InstancePort: 443, SSLCertificateID: lbSpec.SSLCertificate}
+		}
+
 		elb = &awstasks.LoadBalancer{
 			Name:      s("api." + b.ClusterName()),
 			Lifecycle: b.Lifecycle,
@@ -110,10 +118,8 @@ func (b *APILoadBalancerBuilder) Build(c *fi.ModelBuilderContext) error {
 			SecurityGroups: []*awstasks.SecurityGroup{
 				b.LinkToELBSecurityGroup("api"),
 			},
-			Subnets: elbSubnets,
-			Listeners: map[string]*awstasks.LoadBalancerListener{
-				"443": {InstancePort: 443},
-			},
+			Subnets:   elbSubnets,
+			Listeners: listeners,
 
 			// Configure fast-recovery health-checks
 			HealthCheck: &awstasks.LoadBalancerHealthCheck{

pkg/validation/validate_cluster.go

@@ -71,7 +71,6 @@ func hasPlaceHolderIP(clusterName string) (bool, error) {
 	if err != nil {
 		return true, fmt.Errorf("unable to parse Kubernetes cluster API URL: %v", err)
 	}
-
 	hostAddrs, err := net.LookupHost(apiAddr.Hostname())
 	if err != nil {
 		return true, fmt.Errorf("unable to resolve Kubernetes cluster API URL dns: %v", err)

upup/pkg/fi/cloudup/awstasks/load_balancer.go

@@ -58,12 +58,12 @@ type LoadBalancer struct {
 
 	Scheme *string
 
-	HealthCheck *LoadBalancerHealthCheck
-	AccessLog   *LoadBalancerAccessLog
-	//AdditionalAttributes   []*LoadBalancerAdditionalAttribute
+	HealthCheck            *LoadBalancerHealthCheck
+	AccessLog              *LoadBalancerAccessLog
 	ConnectionDraining     *LoadBalancerConnectionDraining
 	ConnectionSettings     *LoadBalancerConnectionSettings
 	CrossZoneLoadBalancing *LoadBalancerCrossZoneLoadBalancing
+	SSLCertificateID       string
 }
 
 var _ fi.CompareWithID = &LoadBalancer{}
@@ -73,17 +73,17 @@ func (e *LoadBalancer) CompareWithID() *string {
 }
 
 type LoadBalancerListener struct {
-	InstancePort int
+	InstancePort     int
+	SSLCertificateID string
 }
 
 func (e *LoadBalancerListener) mapToAWS(loadBalancerPort int64) *elb.Listener {
 	return &elb.Listener{
 		LoadBalancerPort: aws.Int64(loadBalancerPort),
-
-		Protocol: aws.String("TCP"),
-
-		InstanceProtocol: aws.String("TCP"),
+		Protocol:         aws.String("SSL"),
+		InstanceProtocol: aws.String("SSL"),
 		InstancePort:     aws.Int64(int64(e.InstancePort)),
+		SSLCertificateId: aws.String(e.SSLCertificateID),
 	}
 }
 
@@ -334,16 +334,6 @@ func (e *LoadBalancer) Find(c *fi.Context) (*LoadBalancer, error) {
 			actual.AccessLog.S3BucketPrefix = lbAttributes.AccessLog.S3BucketPrefix
 		}
 
-		// We don't map AdditionalAttributes - yet
-		//var additionalAttributes []*LoadBalancerAdditionalAttribute
-		//for index, additionalAttribute := range lbAttributes.AdditionalAttributes {
-		//	additionalAttributes[index] = &LoadBalancerAdditionalAttribute{
-		//		Key:   additionalAttribute.Key,
-		//		Value: additionalAttribute.Value,
-		//	}
-		//}
-		//actual.AdditionalAttributes = additionalAttributes
-
 		actual.ConnectionDraining = &LoadBalancerConnectionDraining{}
 		if lbAttributes.ConnectionDraining.Enabled != nil {
 			actual.ConnectionDraining.Enabled = lbAttributes.ConnectionDraining.Enabled
@@ -381,7 +371,7 @@ func (e *LoadBalancer) Find(c *fi.Context) (*LoadBalancer, error) {
 	// 1. We don't want to force a rename of the ELB, because that is a destructive operation
 	// 2. We were creating ELBs with insufficiently qualified names previously
 	if fi.StringValue(e.LoadBalancerName) != fi.StringValue(actual.LoadBalancerName) {
-		glog.V(2).Infof("Resuing existing load balancer with name: %q", actual.LoadBalancerName)
+		glog.V(2).Infof("Reusing existing load balancer with name: %q", actual.LoadBalancerName)
 		e.LoadBalancerName = actual.LoadBalancerName
 	}
 
@@ -453,11 +443,7 @@ func (s *LoadBalancer) CheckChanges(a, e, changes *LoadBalancer) error {
 				return fi.RequiredField("ConnectionDraining.Enabled")
 			}
 		}
-		//if e.ConnectionSettings != nil {
-		//	if e.ConnectionSettings.IdleTimeout == nil {
-		//		return fi.RequiredField("ConnectionSettings.IdleTimeout")
-		//	}
-		//}
+
 		if e.CrossZoneLoadBalancing != nil {
 			if e.CrossZoneLoadBalancing.Enabled == nil {
 				return fi.RequiredField("CrossZoneLoadBalancing.Enabled")
@@ -558,6 +544,20 @@ func (_ *LoadBalancer) RenderAWS(t *awsup.AWSAPITarget, a, e, changes *LoadBalan
 		}
 
 		if changes.Listeners != nil {
+
+			elbDescription, err := findLoadBalancerByLoadBalancerName(t.Cloud, loadBalancerName)
+			if err != nil {
+				return fmt.Errorf("error getting load balancer by name: %v", err)
+			}
+
+			if elbDescription != nil {
+				// deleting the listener before recreating it
+				t.Cloud.ELB().DeleteLoadBalancerListeners(&elb.DeleteLoadBalancerListenersInput{
+					LoadBalancerName:  aws.String(loadBalancerName),
+					LoadBalancerPorts: []*int64{aws.Int64(443)},
+				})
+			}
+
 			request := &elb.CreateLoadBalancerListenersInput{}
 			request.LoadBalancerName = aws.String(loadBalancerName)
 
@@ -572,7 +572,7 @@ func (_ *LoadBalancer) RenderAWS(t *awsup.AWSAPITarget, a, e, changes *LoadBalan
 
 			glog.V(2).Infof("Creating LoadBalancer listeners")
 
-			_, err := t.Cloud.ELB().CreateLoadBalancerListeners(request)
+			_, err = t.Cloud.ELB().CreateLoadBalancerListeners(request)
 			if err != nil {
 				return fmt.Errorf("error creating LoadBalancerListeners: %v", err)
 			}