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binding_controller.go
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binding_controller.go
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/*
* Copyright 2019 IBM Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package binding
import (
"context"
"encoding/json"
"fmt"
"reflect"
"strings"
"time"
iam "github.com/IBM-Cloud/bluemix-go/api/iam/iamv1"
bxcontroller "github.com/IBM-Cloud/bluemix-go/api/resource/resourcev1/controller"
"github.com/IBM-Cloud/bluemix-go/crn"
"github.com/IBM-Cloud/bluemix-go/models"
"github.com/IBM-Cloud/bluemix-go/utils"
ibmcloudv1alpha1 "github.com/ibm/cloud-operators/pkg/apis/ibmcloud/v1alpha1"
"github.com/ibm/cloud-operators/pkg/controller/service"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
"sigs.k8s.io/controller-runtime/pkg/source"
)
var logt = logf.Log.WithName("binding")
const bindingFinalizer = "binding.ibmcloud.ibm.com"
// ContainsFinalizer checks if the instance contains service finalizer
func ContainsFinalizer(instance *ibmcloudv1alpha1.Binding) bool {
for _, finalizer := range instance.ObjectMeta.Finalizers {
if strings.Contains(finalizer, bindingFinalizer) {
return true
}
}
return false
}
// DeleteFinalizer delete service finalizer
func DeleteFinalizer(instance *ibmcloudv1alpha1.Binding) []string {
var result []string
for _, finalizer := range instance.ObjectMeta.Finalizers {
if finalizer == bindingFinalizer {
continue
}
result = append(result, finalizer)
}
return result
}
// Add creates a new Binding Controller and adds it to the Manager with default RBAC. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
// USER ACTION REQUIRED: update cmd/manager/main.go to call this ibmcloud.Add(mgr) to install this Controller
func Add(mgr manager.Manager) error {
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
return &ReconcileBinding{Client: mgr.GetClient(), scheme: mgr.GetScheme()}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New("binding-controller", mgr, controller.Options{Reconciler: r, MaxConcurrentReconciles: 1})
if err != nil {
return err
}
// Watch for changes to Binding
err = c.Watch(&source.Kind{Type: &ibmcloudv1alpha1.Binding{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
err = c.Watch(&source.Kind{Type: &corev1.Secret{}}, &handler.EnqueueRequestForOwner{
IsController: true,
OwnerType: &ibmcloudv1alpha1.Binding{},
})
if err != nil {
return err
}
return nil
}
var _ reconcile.Reconciler = &ReconcileBinding{}
// ReconcileBinding reconciles a Binding object
type ReconcileBinding struct {
client.Client
scheme *runtime.Scheme
}
// Reconcile reads that state of the cluster for a Binding object and makes changes based on the state read
// and what is in the Binding.Spec
// Automatically generate RBAC rules to allow the Controller to read and write Deployments
// +kubebuilder:rbac:groups=apps,resources=deployments,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=ibmcloud.ibm.com,resources=bindings,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=ibmcloud.ibm.com,resources=bindings/finalizers,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=ibmcloud.ibm.com,resources=services,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=ibmcloud.ibm.com,resources=services/finalizers,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=core,resources=secrets,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=,resources=configmaps,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=ibmcloud.ibm.com,resources=bindings/status,verbs=get;list;watch;create;update;patch;delete
func (r *ReconcileBinding) Reconcile(request reconcile.Request) (reconcile.Result, error) {
// Fetch the Binding instance
instance := &ibmcloudv1alpha1.Binding{}
err := r.Get(context.Background(), request.NamespacedName, instance)
if err != nil {
if errors.IsNotFound(err) {
// Object not found, return. Created objects are automatically garbage collected.
// For additional cleanup logic use finalizers.
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
// Set the Status field for the first time
if reflect.DeepEqual(instance.Status, ibmcloudv1alpha1.BindingStatus{}) {
instance.Status.State = "Pending"
instance.Status.Message = "Processing Resource"
if err := r.Status().Update(context.Background(), instance); err != nil {
logt.Info("Binding could not update Status", instance.Name, err.Error())
return reconcile.Result{}, nil
}
}
// First, make sure that there is a current service InstanceID
// Obtain the serviceInstance corresponding to this Binding object
serviceInstance, err := r.getServiceInstance(instance)
if err != nil {
logt.Info("Binding could not read service", instance.Spec.ServiceName, err.Error())
// We could not find a parent service. However, if this instance is marked for deletion, delete it anyway
if !instance.ObjectMeta.DeletionTimestamp.IsZero() {
// In this case it is enough to simply remove the finalizer:
// the credentials do not exist on the cloud, since the service cannot be found.
// Also by removing the Binding instance, any correponding secret will also be deleted by Kubernetes.
instance.ObjectMeta.Finalizers = DeleteFinalizer(instance)
if err := r.Update(context.Background(), instance); err != nil {
logt.Info("Error removing finalizers", "in deletion", err.Error())
// No further action required, object was modified, another reconcile will finish the job.
}
return reconcile.Result{}, nil
}
return reconcile.Result{Requeue: true, RequeueAfter: time.Second * 10}, nil //Requeue fast
}
if err := controllerutil.SetControllerReference(serviceInstance, instance, r.scheme); err != nil {
logt.Info("Binding could not update constroller reference", instance.Name, err.Error())
return reconcile.Result{}, err
}
if err := r.Update(context.Background(), instance); err != nil {
logt.Info("Error setting controller reference", instance.Name, err.Error())
return reconcile.Result{}, nil
}
if serviceInstance.Status.InstanceID == "" || serviceInstance.Status.InstanceID == "IN PROGRESS" {
// The parent service has not been initialized fully yet
return reconcile.Result{Requeue: true, RequeueAfter: time.Second * 10}, nil //Requeue fast
}
ibmCloudInfo, err := service.GetIBMCloudInfo(r.Client, serviceInstance)
if err != nil {
return r.updateStatusError(instance, "Failed", err)
}
// Delete if necessary
if instance.ObjectMeta.DeletionTimestamp.IsZero() {
// Instance is not being deleted, add the finalizer if not present
if !ContainsFinalizer(instance) {
instance.ObjectMeta.Finalizers = append(instance.ObjectMeta.Finalizers, bindingFinalizer)
if err := r.Update(context.Background(), instance); err != nil {
logt.Info("Error adding finalizer", instance.Name, err.Error())
return reconcile.Result{}, nil
}
}
} else {
// The object is being deleted
if ContainsFinalizer(instance) {
err := r.deleteCredentials(instance, ibmCloudInfo)
if err != nil {
logt.Info("Error deleting credentials", "in deletion", err.Error())
return reconcile.Result{Requeue: true, RequeueAfter: time.Second * 10}, nil
}
// remove our finalizer from the list and update it.
instance.ObjectMeta.Finalizers = DeleteFinalizer(instance)
if err := r.Update(context.Background(), instance); err != nil {
logt.Info("Error removing finalizers", "in deletion", err.Error())
}
return reconcile.Result{}, nil
}
}
if instance.Status.InstanceID == "" { // The service Instance ID has not been initialized yet
instance.Status.InstanceID = serviceInstance.Status.InstanceID
} else { // The service Instance ID has been set, verify that it is current
if instance.Status.InstanceID != serviceInstance.Status.InstanceID {
logt.Info("ServiceKey", "Service parent", "has changed")
err := r.deleteCredentials(instance, ibmCloudInfo)
if err != nil {
logt.Info("Error deleting credentials", "in deletion", err.Error())
return r.updateStatusError(instance, "Failed", err)
}
instance.Status.InstanceID = serviceInstance.Status.InstanceID
}
}
// Now instance.Status.IntanceID has been set properly
if instance.Status.KeyInstanceID == "" { // The KeyInstanceID has not been set, need to create the key
instance.Status.KeyInstanceID = "IN PROGRESS"
if err := r.Status().Update(context.Background(), instance); err != nil {
logt.Info("Error updating KeyInstanceID to be in progress", "Error", err.Error())
return reconcile.Result{}, nil
}
keyInstanceID, keyContents, err := r.createCredentials(instance, ibmCloudInfo)
if err != nil {
if strings.Contains(err.Error(), "still in progress") {
return r.updateStatusError(instance, "Pending", err)
}
return r.updateStatusError(instance, "Failed", err)
}
instance.Status.KeyInstanceID = keyInstanceID
// Now create the secret
err = r.createSecret(instance, keyContents)
if err != nil {
return r.updateStatusError(instance, "Failed", err)
}
return r.updateStatusOnline(instance, serviceInstance, ibmCloudInfo)
} else { // The KeyInstanceID has been set, verify that the key and secret still exist
logt.Info("ServiceInstance Key", "should already exist, verifying", instance.ObjectMeta.Name)
keyInstanceID, keyContents, err := r.getCredentials(instance, ibmCloudInfo)
_, contentsContainRedacted := keyContents["REDACTED"]
if err != nil || contentsContainRedacted {
// TODO: check if service is gone
logt.Info("ServiceInstance Key does not exist", "Recreating", instance.ObjectMeta.Name)
keyInstanceID, keyContents, err = r.createCredentials(instance, ibmCloudInfo)
if err != nil {
return r.updateStatusError(instance, "Failed", err)
}
instance.Status.KeyInstanceID = keyInstanceID
}
secret, err := GetSecret(r, instance)
if err != nil {
logt.Info("Secret does not exist", "Recreating", getSecretName(instance))
err = r.createSecret(instance, keyContents)
if err != nil {
return r.updateStatusError(instance, "Failed", err)
}
return r.updateStatusOnline(instance, serviceInstance, ibmCloudInfo)
} else {
// The secret exists, make sure it has the right content
changed, err := keyContentsChanged(keyContents, secret)
if err != nil {
return r.updateStatusError(instance, "Failed", err)
}
if instance.Status.KeyInstanceID != secret.Annotations["service-key-id"] || changed { // Warning: the deep comparison may not be needed, the key is probably enough
err := r.deleteSecret(secret)
if err != nil {
return r.updateStatusError(instance, "Failed", err)
}
err = r.createSecret(instance, keyContents)
if err != nil {
return r.updateStatusError(instance, "Failed", err)
}
return r.updateStatusOnline(instance, serviceInstance, ibmCloudInfo)
}
return r.updateStatusOnline(instance, serviceInstance, ibmCloudInfo)
}
}
}
func keyContentsChanged(keyContents map[string]interface{}, secret *corev1.Secret) (bool, error) {
newContent, err := processKey(keyContents)
if err != nil {
return false, err
}
return !reflect.DeepEqual(newContent, secret.Data), nil
}
func (r *ReconcileBinding) updateStatusError(instance *ibmcloudv1alpha1.Binding, state string, err error) (reconcile.Result, error) {
message := err.Error()
logt.Info(message)
if strings.Contains(message, "dial tcp: lookup iam.cloud.ibm.com: no such host") || strings.Contains(message, "dial tcp: lookup login.ng.bluemix.net: no such host") {
// This means that the IBM Cloud server is under too much pressure, we need to back up
if instance.Status.State != state {
instance.Status.Message = "Temporarily lost connection to server"
instance.Status.State = "Pending"
if err := r.Status().Update(context.Background(), instance); err != nil {
logt.Info("Error updating status", state, err.Error())
}
}
return reconcile.Result{Requeue: true, RequeueAfter: time.Minute * 3}, nil
}
if instance.Status.State != state {
instance.Status.State = state
instance.Status.Message = message
if err := r.Status().Update(context.Background(), instance); err != nil {
logt.Info("Error updating status", state, err.Error())
return reconcile.Result{}, nil
}
}
return reconcile.Result{Requeue: true, RequeueAfter: time.Minute * 3}, nil
}
func (r *ReconcileBinding) updateStatusOnline(instance *ibmcloudv1alpha1.Binding, serviceInstance *ibmcloudv1alpha1.Service, ibmCloudInfo *service.IBMCloudInfo) (reconcile.Result, error) {
instance.Status.State = "Online"
instance.Status.Message = "Online"
err := r.Status().Update(context.Background(), instance)
if err != nil {
logt.Info("Failed to update online status, will delete external resource ", instance.ObjectMeta.Name, err.Error())
err = r.deleteCredentials(instance, ibmCloudInfo)
if err != nil {
logt.Info("Failed to delete external resource, operator state and external resource might be in an inconsistent state", instance.ObjectMeta.Name, err.Error())
}
}
return reconcile.Result{Requeue: true, RequeueAfter: time.Minute * 30}, nil
}
func (r *ReconcileBinding) getServiceInstance(instance *ibmcloudv1alpha1.Binding) (*ibmcloudv1alpha1.Service, error) {
serviceNameSpace := instance.ObjectMeta.Namespace
if instance.Spec.ServiceNamespace != "" {
serviceNameSpace = instance.Spec.ServiceNamespace
}
serviceInstance := &ibmcloudv1alpha1.Service{}
err := r.Get(context.Background(), types.NamespacedName{Name: instance.Spec.ServiceName, Namespace: serviceNameSpace}, serviceInstance)
if err != nil {
return &ibmcloudv1alpha1.Service{}, err
}
return serviceInstance, nil
}
func processKey(keyContents map[string]interface{}) (map[string][]byte, error) {
ret := make(map[string][]byte)
for k, v := range keyContents {
keyString := strings.Replace(k, " ", "_", -1)
// need to re-marshal as json might have complex types, which need to be flattened in strings
jString, err := json.Marshal(v)
if err != nil {
return ret, err
}
// need to remove quotes from flattened objects
strVal := strings.TrimPrefix(string(jString), "\"")
strVal = strings.TrimSuffix(strVal, "\"")
ret[keyString] = []byte(strVal)
}
return ret, nil
}
func (r *ReconcileBinding) createCredentials(instance *ibmcloudv1alpha1.Binding, ibmCloudInfo *service.IBMCloudInfo) (string, map[string]interface{}, error) {
var keyContents map[string]interface{}
var keyInstanceID string
logt.Info("Creating", "credentials", instance.ObjectMeta.Name)
parameters := getParams(instance)
if ibmCloudInfo.ServiceClassType == "CF" { // service type is CF
serviceKeys := ibmCloudInfo.BXClient.ServiceKeys()
key, err := serviceKeys.Create(instance.Status.InstanceID, instance.ObjectMeta.Name, parameters)
if err != nil {
return "", nil, err
}
keyInstanceID = key.Metadata.GUID
keyContents = key.Entity.Credentials
} else { // service type is not CF
resServiceInstanceAPI := ibmCloudInfo.ResourceClient.ResourceServiceInstance()
serviceInstanceModel, err := resServiceInstanceAPI.GetInstance(instance.Status.InstanceID)
if err != nil {
return "", nil, err
}
resCatalogAPI := ibmCloudInfo.CatalogClient.ResourceCatalog()
serviceresp, err := resCatalogAPI.Get(serviceInstanceModel.ServiceID, true)
if err != nil {
return "", nil, err
}
iamClient, err := iam.New(ibmCloudInfo.Session)
if err != nil {
return "", nil, err
}
serviceRolesAPI := iamClient.ServiceRoles()
var roles []models.PolicyRole
if serviceresp.Name == "" {
roles, err = serviceRolesAPI.ListSystemDefinedRoles()
} else {
roles, err = serviceRolesAPI.ListServiceRoles(serviceresp.Name)
}
if err != nil {
return "", nil, err
}
var roleID crn.CRN
if instance.Spec.Role != "" {
roleMatch, err := utils.FindRoleByName(roles, instance.Spec.Role)
if err != nil {
return "", nil, err
}
roleID = roleMatch.ID
} else {
if len(roles) == 0 {
return "", nil, fmt.Errorf("The service has no roles defined for its bindings")
}
managerRole, err := getManagerRole(roles)
if err != nil {
// No Manager role found
roleID = roles[0].ID
} else {
roleID = managerRole.ID
}
}
parameters["role_crn"] = roleID
resServiceKeyAPI := ibmCloudInfo.ResourceClient.ResourceServiceKey()
params := bxcontroller.CreateServiceKeyRequest{
Name: instance.ObjectMeta.Name,
SourceCRN: serviceInstanceModel.Crn,
Parameters: parameters,
}
keyresp, err := resServiceKeyAPI.CreateKey(params)
if err != nil {
return "", nil, err
}
keyInstanceID = keyresp.ID
keyContents = keyresp.Credentials
}
return keyInstanceID, keyContents, nil
}
func (r *ReconcileBinding) createSecret(instance *ibmcloudv1alpha1.Binding, keyContents map[string]interface{}) error {
logt.Info("Creating ", "secret", instance.ObjectMeta.Name)
datamap, err := processKey(keyContents)
if err != nil {
return err
}
secret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: getSecretName(instance),
Annotations: map[string]string{
"service-instance-id": instance.Status.InstanceID,
"service-key-id": instance.Status.KeyInstanceID,
"bindingFromName": instance.Spec.ServiceName,
},
Namespace: instance.Namespace,
},
Data: datamap,
}
if err := controllerutil.SetControllerReference(instance, secret, r.scheme); err != nil {
return err
}
if err := r.Create(context.Background(), secret); err != nil {
return err
}
return nil
}
// deleteCredentials also deletes the corresponding secret
func (r *ReconcileBinding) deleteCredentials(instance *ibmcloudv1alpha1.Binding, ibmCloudInfo *service.IBMCloudInfo) error {
logt.Info("Deleting", "credentials", instance.ObjectMeta.Name)
if ibmCloudInfo.ServiceClassType == "CF" { // service type is CF
serviceKeys := ibmCloudInfo.BXClient.ServiceKeys()
err := serviceKeys.Delete(instance.Status.KeyInstanceID)
if err != nil && !strings.Contains(err.Error(), "410") && !strings.Contains(err.Error(), "404") { // we do not propagate an error if the service or credential no longer exist
return err
}
} else { // service type is not CF
resServiceKeyAPI := ibmCloudInfo.ResourceClient.ResourceServiceKey()
err := resServiceKeyAPI.DeleteKey(instance.Status.KeyInstanceID)
if err != nil && !strings.Contains(err.Error(), "410") && !strings.Contains(err.Error(), "404") { // we do not propagate an error if the service or credential no longer exist
return err
}
}
secret, err := GetSecret(r, instance)
if err != nil {
if strings.Contains(err.Error(), "not found") {
return nil
}
return err
}
return r.deleteSecret(secret)
}
func (r *ReconcileBinding) deleteSecret(secret *corev1.Secret) error {
logt.Info("Deleting ", "secret", secret.Name)
if err := r.Delete(context.Background(), secret); err != nil {
return err
}
return nil
}
func getSecretName(instance *ibmcloudv1alpha1.Binding) string {
secretName := instance.ObjectMeta.Name
if instance.Spec.SecretName != "" {
secretName = instance.Spec.SecretName
}
return secretName
}
func (r *ReconcileBinding) getCredentials(instance *ibmcloudv1alpha1.Binding, ibmCloudInfo *service.IBMCloudInfo) (string, map[string]interface{}, error) {
logt.Info("Getting", "credentials", instance.ObjectMeta.Name)
if ibmCloudInfo.ServiceClassType == "CF" { // service type is CF
serviceKeys := ibmCloudInfo.BXClient.ServiceKeys()
myRetrievedKeys, err := serviceKeys.FindByName(instance.Status.InstanceID, instance.ObjectMeta.Name)
if err != nil {
return "", nil, err
}
return myRetrievedKeys.GUID, myRetrievedKeys.Credentials, nil
}
// service type is not CF
resServiceKeyAPI := ibmCloudInfo.ResourceClient.ResourceServiceKey()
keyresp, err := resServiceKeyAPI.GetKey(instance.Status.KeyInstanceID)
if err != nil {
return "", nil, err
}
return keyresp.ID, keyresp.Credentials, nil
}
func getParams(instance *ibmcloudv1alpha1.Binding) map[string]interface{} {
params := make(map[string]interface{})
for _, p := range instance.Spec.Parameters {
params[p.Name] = p.Value
}
return params
}
func getManagerRole(roles []models.PolicyRole) (models.PolicyRole, error) {
for _, role := range roles {
if role.DisplayName == "Manager" {
return role, nil
}
}
return models.PolicyRole{}, fmt.Errorf("No Manager role found")
}