Support role annotation

apis/core/v1alpha1/annotations.go

@@ -35,6 +35,15 @@ const (
 	// TODO(jaypipes): Link to documentation on cross-account resource
 	// management
 	AnnotationOwnerAccountID = AnnotationPrefix + "owner-account-id"
+	// AnnotationTeamID is an annotation whose value is the identifier
+	// for the AWS team ID to manage the resources.  If this annotation
+	// is set on a CR, the Kubernetes user is indicating that the ACK service
+	// controller should create/patch/delete the resource in the specified AWS
+	// role for this team ID. In order for this cross-account resource management
+	// to succeed, the AWS IAM Role that the ACK service controller runs as needs
+	// to have the ability to call the AWS STS::AssumeRole API call and assume an
+	// IAM Role in the target AWS Account.
+	AnnotationTeamID = AnnotationPrefix + "team-id"
 	// AnnotationRegion is an annotation whose value is the identifier for the
 	// the AWS region in which the resources should be created. If this annotation
 	// is set on a CR metadata, that means the user is indicating to the ACK service

apis/core/v1alpha1/common.go

@@ -19,6 +19,9 @@ type AWSRegion string
 // AWSAccountID represents an AWS account identifier
 type AWSAccountID string
 
+// TeamID represents a team ID identifier.
+type TeamID string
+
 // AWSResourceName represents an AWS Resource Name (ARN)
 type AWSResourceName string
 

pkg/runtime/adoption_reconciler.go

@@ -17,6 +17,7 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/aws/aws-sdk-go/aws/arn"
 	"github.com/go-logr/logr"
 	"github.com/pkg/errors"
 	corev1 "k8s.io/api/core/v1"
@@ -108,27 +109,49 @@ func (r *adoptionReconciler) reconcile(ctx context.Context, req ctrlrt.Request)
 		return ackerr.NotAdoptable
 	}
 
+	// If a user specified a namespace with role ARN annotation,
+	// we need to get the role and set the accout ID to that role.
+	teamID := r.getTeamID(res)
+
 	// If a user has specified a namespace that is annotated with the
 	// an owner account ID, we need an appropriate role ARN to assume
 	// in order to perform the reconciliation. The roles ARN are typically
 	// stored in a ConfigMap in the ACK system namespace.
 	// If the ConfigMap is not created, or not populated with an
 	// accountID to roleARN mapping, we need to properly requeue with a
 	// helpful message to the user.
-	var roleARN ackv1alpha1.AWSResourceName
 	acctID, needCARMLookup := r.getOwnerAccountID(res)
+
+	var CARMLookupKey string
+	if teamID != "" {
+		CARMLookupKey = string(teamID)
+		needCARMLookup = true
+	} else {
+		CARMLookupKey = string(acctID)
+	}
+
+	var roleARN ackv1alpha1.AWSResourceName
 	if needCARMLookup {
 		// This means that the user is specifying a namespace that is
-		// annotated with an owner account ID. We need to retrieve the
+		// annotated with an owner account ID or team ID. We need to retrieve the
 		// roleARN from the ConfigMap and properly requeue if the roleARN
 		// is not available.
-		roleARN, err = r.getRoleARN(acctID)
+		roleARN, err = r.getRoleARN(CARMLookupKey)
 		if err != nil {
 			ackrtlog.InfoAdoptedResource(r.log, res, fmt.Sprintf("Unable to start adoption reconcilliation %s: %v", acctID, err))
 			// r.getRoleARN errors are not terminal, we should requeue.
 			return requeue.NeededAfter(err, roleARNNotAvailableRequeueDelay)
 		}
 	}
+
+	if teamID != "" {
+		parsedARN, err := arn.Parse(string(roleARN))
+		if err != nil {
+			return fmt.Errorf("failed to parsed role ARN %q from namespace annotation: %v", teamID, err)
+		}
+		acctID = ackv1alpha1.AWSAccountID(parsedARN.AccountID)
+	}
+
 	region := r.getRegion(res)
 	targetDescriptor := rmf.ResourceDescriptor()
 	endpointURL := r.getEndpointURL(res)
@@ -460,6 +483,20 @@ func (r *adoptionReconciler) getOwnerAccountID(
 	return ackv1alpha1.AWSAccountID(r.cfg.AccountID), false
 }
 
+// getTeamID gets the team-id from the namespace
+// annotation.
+func (r *adoptionReconciler) getTeamID(
+	res *ackv1alpha1.AdoptedResource,
+) ackv1alpha1.TeamID {
+	// look for team-id in the namespace annotations
+	namespace := res.GetNamespace()
+	teamID, ok := r.cache.Namespaces.GetTeamID(namespace)
+	if ok {
+		return ackv1alpha1.TeamID(teamID)
+	}
+	return ackv1alpha1.TeamID("")
+}
+
 // getEndpointURL returns the AWS account that owns the supplied resource.
 // We look for the namespace associated endpoint url, if that is set we use it.
 // Otherwise if none of these annotations are set we use the endpoint url specified
@@ -481,11 +518,11 @@ func (r *adoptionReconciler) getEndpointURL(
 // getRoleARN return the Role ARN that should be assumed in order to manage
 // the resources.
 func (r *adoptionReconciler) getRoleARN(
-	acctID ackv1alpha1.AWSAccountID,
+	key string,
 ) (ackv1alpha1.AWSResourceName, error) {
-	roleARN, err := r.cache.Accounts.GetAccountRoleARN(string(acctID))
+	roleARN, err := r.cache.Accounts.GetRoleARN(key)
 	if err != nil {
-		return "", fmt.Errorf("unable to retrieve role ARN for account %s: %v", acctID, err)
+		return "", fmt.Errorf("unable to retrieve role ARN for annotation %q: %v", key, err)
 	}
 	return ackv1alpha1.AWSResourceName(roleARN), nil
 }

pkg/runtime/cache/account.go

@@ -15,6 +15,7 @@ package cache
 
 import (
 	"errors"
+	"fmt"
 	"sync"
 
 	"github.com/go-logr/logr"
@@ -28,49 +29,57 @@ var (
 	// ErrCARMConfigMapNotFound is an error that is returned when the CARM
 	// configmap is not found.
 	ErrCARMConfigMapNotFound = errors.New("CARM configmap not found")
-	// ErrAccountIDNotFound is an error that is returned when the account ID
+	// ErrKeyNotFound is an error that is returned when the key
 	// is not found in the CARM configmap.
-	ErrAccountIDNotFound = errors.New("account ID not found in CARM configmap")
+	ErrKeyNotFound = errors.New("key not found in CARM configmap")
 	// ErrEmptyRoleARN is an error that is returned when the role ARN is empty
 	// in the CARM configmap.
 	ErrEmptyRoleARN = errors.New("role ARN is empty in CARM configmap")
 )
 
+type CARMName string
+
 const (
 	// ACKRoleAccountMap is the name of the configmap map object storing
 	// all the AWS Account IDs associated with their AWS Role ARNs.
-	ACKRoleAccountMap = "ack-role-account-map"
+	ACKRoleAccountMap CARMName = "ack-role-account-map"
+
+	// ACKRoleTeamMap is the name of the configmap map object storing
+	// all the AWS Team IDs associated with their AWS Role ARNs.
+	ACKRoleTeamMap CARMName = "ack-role-team-map"
 )
 
-// AccountCache is responsible for caching the CARM configmap
+// CARMCache is responsible for caching the CARM configmap
 // data. It is listening to all the events related to the CARM map and
 // make the changes accordingly.
-type AccountCache struct {
+type CARMCache struct {
 	sync.RWMutex
+	name             CARMName
 	log              logr.Logger
 	roleARNs         map[string]string
 	configMapCreated bool
 }
 
-// NewAccountCache instanciate a new AccountCache.
-func NewAccountCache(log logr.Logger) *AccountCache {
-	return &AccountCache{
-		log:              log.WithName("cache.account"),
+// NewCARMCache instanciate a new CARMCache.
+func NewCARMCache(name CARMName, log logr.Logger) *CARMCache {
+	return &CARMCache{
+		log:              log.WithName(fmt.Sprintf("cache.%s", name)),
+		name:             name,
 		roleARNs:         make(map[string]string),
 		configMapCreated: false,
 	}
 }
 
-// resourceMatchACKRoleAccountConfigMap verifies if a resource is
+// resourceMatchACKRoleConfigMap verifies if a resource is
 // the CARM configmap. It verifies the name, namespace and object type.
-func resourceMatchACKRoleAccountsConfigMap(raw interface{}) bool {
+func resourceMatchACKRoleConfigMap(name CARMName, raw interface{}) bool {
 	object, ok := raw.(*corev1.ConfigMap)
-	return ok && object.ObjectMeta.Name == ACKRoleAccountMap
+	return ok && object.ObjectMeta.Name == string(name)
 }
 
 // Run instantiate a new SharedInformer for ConfigMaps and runs it to begin processing items.
-func (c *AccountCache) Run(clientSet kubernetes.Interface, stopCh <-chan struct{}) {
-	c.log.V(1).Info("Starting shared informer for accounts cache", "targetConfigMap", ACKRoleAccountMap)
+func (c *CARMCache) Run(clientSet kubernetes.Interface, stopCh <-chan struct{}) {
+	c.log.V(1).Info("Starting shared informer for CARM cache", "targetConfigMap", c.name)
 	informer := informersv1.NewConfigMapInformer(
 		clientSet,
 		ackSystemNamespace,
@@ -79,65 +88,65 @@ func (c *AccountCache) Run(clientSet kubernetes.Interface, stopCh <-chan struct{
 	)
 	informer.AddEventHandler(k8scache.ResourceEventHandlerFuncs{
 		AddFunc: func(obj interface{}) {
-			if resourceMatchACKRoleAccountsConfigMap(obj) {
+			if resourceMatchACKRoleConfigMap(c.name, obj) {
 				cm := obj.(*corev1.ConfigMap)
 				object := cm.DeepCopy()
 				// To avoid multiple mutex locks, we are updating the cache
 				// and the configmap existence flag in the same function.
 				configMapCreated := true
-				c.updateAccountRoleData(configMapCreated, object.Data)
-				c.log.V(1).Info("created account config map", "name", cm.ObjectMeta.Name)
+				c.updateRoleData(configMapCreated, object.Data)
+				c.log.V(1).Info("created config map", "name", cm.ObjectMeta.Name)
 			}
 		},
 		UpdateFunc: func(orig, desired interface{}) {
-			if resourceMatchACKRoleAccountsConfigMap(desired) {
+			if resourceMatchACKRoleConfigMap(c.name, desired) {
 				cm := desired.(*corev1.ConfigMap)
 				object := cm.DeepCopy()
 				//TODO(a-hilaly): compare data checksum before updating the cache
-				c.updateAccountRoleData(true, object.Data)
-				c.log.V(1).Info("updated account config map", "name", cm.ObjectMeta.Name)
+				c.updateRoleData(true, object.Data)
+				c.log.V(1).Info("updated config map", "name", cm.ObjectMeta.Name)
 			}
 		},
 		DeleteFunc: func(obj interface{}) {
-			if resourceMatchACKRoleAccountsConfigMap(obj) {
+			if resourceMatchACKRoleConfigMap(c.name, obj) {
 				cm := obj.(*corev1.ConfigMap)
 				newMap := make(map[string]string)
 				// To avoid multiple mutex locks, we are updating the cache
 				// and the configmap existence flag in the same function.
 				configMapCreated := false
-				c.updateAccountRoleData(configMapCreated, newMap)
-				c.log.V(1).Info("deleted account config map", "name", cm.ObjectMeta.Name)
+				c.updateRoleData(configMapCreated, newMap)
+				c.log.V(1).Info("deleted config map", "name", cm.ObjectMeta.Name)
 			}
 		},
 	})
 	go informer.Run(stopCh)
 }
 
-// GetAccountRoleARN queries the AWS accountID associated Role ARN
+// GetRoleARN queries the associated Role ARN
 // from the cached CARM configmap. It will return an error if the
-// configmap is not found, the accountID is not found or the role ARN
+// configmap is not found, the key is not found or the role ARN
 // is empty.
 //
 // This function is thread safe.
-func (c *AccountCache) GetAccountRoleARN(accountID string) (string, error) {
+func (c *CARMCache) GetRoleARN(key string) (string, error) {
 	c.RLock()
 	defer c.RUnlock()
 
 	if !c.configMapCreated {
 		return "", ErrCARMConfigMapNotFound
 	}
-	roleARN, ok := c.roleARNs[accountID]
+	roleARN, ok := c.roleARNs[key]
 	if !ok {
-		return "", ErrAccountIDNotFound
+		return "", ErrKeyNotFound
 	}
 	if roleARN == "" {
 		return "", ErrEmptyRoleARN
 	}
 	return roleARN, nil
 }
 
-// updateAccountRoleData updates the CARM map. This function is thread safe.
-func (c *AccountCache) updateAccountRoleData(exist bool, data map[string]string) {
+// updateRoleData updates the CARM map. This function is thread safe.
+func (c *CARMCache) updateRoleData(exist bool, data map[string]string) {
 	c.Lock()
 	defer c.Unlock()
 	c.roleARNs = data