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| 1 | +package bucketrequest |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "strings" |
| 7 | + |
| 8 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 9 | + |
| 10 | + "github.com/kubernetes-sigs/container-object-storage-interface-api/apis/objectstorage.k8s.io/v1alpha1" |
| 11 | + bucketclientset "github.com/kubernetes-sigs/container-object-storage-interface-api/clientset" |
| 12 | + bucketcontroller "github.com/kubernetes-sigs/container-object-storage-interface-api/controller" |
| 13 | + "github.com/kubernetes-sigs/container-object-storage-interface-controller/pkg/util" |
| 14 | + kubeclientset "k8s.io/client-go/kubernetes" |
| 15 | + |
| 16 | + "github.com/golang/glog" |
| 17 | +) |
| 18 | + |
| 19 | +type bucketRequestListener struct { |
| 20 | + kubeClient kubeclientset.Interface |
| 21 | + bucketClient bucketclientset.Interface |
| 22 | +} |
| 23 | + |
| 24 | +func NewListener() bucketcontroller.BucketRequestListener { |
| 25 | + return &bucketRequestListener{} |
| 26 | +} |
| 27 | + |
| 28 | +func (b *bucketRequestListener) InitializeKubeClient(k kubeclientset.Interface) { |
| 29 | + b.kubeClient = k |
| 30 | +} |
| 31 | + |
| 32 | +func (b *bucketRequestListener) InitializeBucketClient(bc bucketclientset.Interface) { |
| 33 | + b.bucketClient = bc |
| 34 | +} |
| 35 | + |
| 36 | +// Add creates a bucket in response to a bucketrequest |
| 37 | +func (b *bucketRequestListener) Add(ctx context.Context, obj *v1alpha1.BucketRequest) error { |
| 38 | + glog.V(1).Infof("add called for bucket %s", obj.Name) |
| 39 | + bucketRequest := obj |
| 40 | + err := b.provisionBucketRequestOperation(ctx, bucketRequest) |
| 41 | + if err != nil { |
| 42 | + // Provisioning is 100% finished / not in progress. |
| 43 | + switch err { |
| 44 | + case util.ErrInvalidBucketClass: |
| 45 | + glog.V(5).Infof("Bucket Class specified does not exist. Stop provisioning, removing bucketRequest %s from bucketRequests in progress", bucketRequest.UID) |
| 46 | + err = nil |
| 47 | + case util.ErrBucketAlreadyExists: |
| 48 | + glog.V(5).Infof("Bucket already exist for this bucket request. Stop provisioning, removing bucketRequest %s from bucketRequests in progress", bucketRequest.UID) |
| 49 | + err = nil |
| 50 | + default: |
| 51 | + glog.V(2).Infof("Final error received, removing buckerRequest %s from bucketRequests in progress", bucketRequest.UID) |
| 52 | + } |
| 53 | + return err |
| 54 | + } |
| 55 | + |
| 56 | + glog.V(5).Infof("BucketRequest processing succeeded, removing bucketRequest %s from bucketRequests in progress", bucketRequest.UID) |
| 57 | + return nil |
| 58 | +} |
| 59 | + |
| 60 | +// update processes any updates made to the bucket request |
| 61 | +func (b *bucketRequestListener) Update(ctx context.Context, old, new *v1alpha1.BucketRequest) error { |
| 62 | + glog.V(1).Infof("update called for bucket %v", old) |
| 63 | + return nil |
| 64 | +} |
| 65 | + |
| 66 | +// Delete processes a bucket for which bucket request is deleted |
| 67 | +func (b *bucketRequestListener) Delete(ctx context.Context, obj *v1alpha1.BucketRequest) error { |
| 68 | + return nil |
| 69 | +} |
| 70 | + |
| 71 | +// provisionBucketRequestOperation attempts to provision a bucket for the given bucketRequest. |
| 72 | +// Returns nil error only when the bucket was provisioned, an error it set appropriately if not. |
| 73 | +// Returns a normal error when the bucket was not provisioned and provisioning should be retried (requeue the bucketRequest), |
| 74 | +// or the special error errBucketAlreadyExists, errInvalidBucketClass, when provisioning was impossible and |
| 75 | +// no further attempts to provision should be tried. |
| 76 | +func (b *bucketRequestListener) provisionBucketRequestOperation(ctx context.Context, bucketRequest *v1alpha1.BucketRequest) error { |
| 77 | + // Most code here is identical to that found in controller.go of kube's controller... |
| 78 | + bucketClassName := b.GetBucketClass(bucketRequest) |
| 79 | + |
| 80 | + // A previous doProvisionBucketRequest may just have finished while we were waiting for |
| 81 | + // the locks. Check that bucket (with deterministic name) hasn't been provisioned |
| 82 | + // yet. |
| 83 | + bucket := b.FindBucket(ctx, bucketRequest) |
| 84 | + if bucket != nil { |
| 85 | + // bucket has been already provisioned, nothing to do. |
| 86 | + glog.Info("Bucket already exists", bucket.Name) |
| 87 | + return util.ErrBucketAlreadyExists |
| 88 | + } |
| 89 | + |
| 90 | + bucketClass, err := b.bucketClient.ObjectstorageV1alpha1().BucketClasses().Get(ctx, bucketClassName, metav1.GetOptions{}) |
| 91 | + if bucketClass == nil { |
| 92 | + // bucketclass does not exist in order to create a bucket |
| 93 | + return util.ErrInvalidBucketClass |
| 94 | + } |
| 95 | + |
| 96 | + glog.Infof("creating bucket for bucketrequest %v", bucketRequest.Name) |
| 97 | + |
| 98 | + // create bucket |
| 99 | + bucket = &v1alpha1.Bucket{} |
| 100 | + bucket.Name = fmt.Sprintf("%s%s", bucketRequest.Spec.BucketPrefix, util.GetUUID()) |
| 101 | + bucket.Spec.Provisioner = bucketClass.Provisioner |
| 102 | + bucket.Spec.RetentionPolicy = bucketClass.RetentionPolicy |
| 103 | + bucket.Spec.AnonymousAccessMode = bucketClass.AnonymousAccessMode |
| 104 | + bucket.Spec.BucketClassName = bucketClass.Name |
| 105 | + bucket.Spec.BucketRequest = &v1alpha1.BucketRequestReference{ |
| 106 | + Name: bucketRequest.Name, |
| 107 | + Namespace: bucketRequest.Namespace, |
| 108 | + UID: bucketRequest.ObjectMeta.UID} |
| 109 | + bucket.Spec.AllowedNamespaces = util.CopyStrings(bucketClass.AllowedNamespaces) |
| 110 | + bucket.Spec.Parameters = util.CopySS(bucketClass.Parameters) |
| 111 | + |
| 112 | + // TODO have a switch statement to populate appropriate protocol based on BR.Protocol |
| 113 | + bucket.Spec.Protocol.RequestedProtocol = bucketRequest.Spec.Protocol |
| 114 | + |
| 115 | + bucket, err = b.bucketClient.ObjectstorageV1alpha1().Buckets().Create(context.Background(), bucket, metav1.CreateOptions{}) |
| 116 | + if err != nil { |
| 117 | + glog.V(5).Infof("Error occurred when creating bucket %v", err) |
| 118 | + return err |
| 119 | + } |
| 120 | + |
| 121 | + glog.Infof("Finished creating bucket %v", bucket.Name) |
| 122 | + return nil |
| 123 | +} |
| 124 | + |
| 125 | +// GetBucketClass returns BucketClassName. If no bucket class was in the request it returns empty |
| 126 | +// TODO this methods can be more sophisticate to address bucketClass overrides using annotations just like SC. |
| 127 | +func (b *bucketRequestListener) GetBucketClass(bucketRequest *v1alpha1.BucketRequest) string { |
| 128 | + |
| 129 | + if bucketRequest.Spec.BucketClassName != "" { |
| 130 | + return bucketRequest.Spec.BucketClassName |
| 131 | + } |
| 132 | + |
| 133 | + return "" |
| 134 | +} |
| 135 | + |
| 136 | +func (b *bucketRequestListener) FindBucket(ctx context.Context, br *v1alpha1.BucketRequest) *v1alpha1.Bucket { |
| 137 | + bucketList, err := b.bucketClient.ObjectstorageV1alpha1().Buckets().List(ctx, metav1.ListOptions{}) |
| 138 | + if err != nil { |
| 139 | + return nil |
| 140 | + } |
| 141 | + if len(bucketList.Items) > 0 { |
| 142 | + for _, bucket := range bucketList.Items { |
| 143 | + if strings.HasPrefix(bucket.Name, br.Spec.BucketPrefix) && |
| 144 | + bucket.Spec.BucketClassName == br.Spec.BucketClassName && |
| 145 | + bucket.Spec.BucketRequest.Name == br.Name && |
| 146 | + bucket.Spec.BucketRequest.Namespace == br.Namespace && |
| 147 | + bucket.Spec.BucketRequest.UID == br.ObjectMeta.UID { |
| 148 | + return &bucket |
| 149 | + } |
| 150 | + } |
| 151 | + } |
| 152 | + return nil |
| 153 | +} |
| 154 | + |
| 155 | +// cloneTheBucket clones a bucket to a different namespace when a BR is for brownfield. |
| 156 | +func (b *bucketRequestListener) cloneTheBucket(bucketRequest *v1alpha1.BucketRequest) error { |
| 157 | + glog.V(1).Infof("clone called for bucket %s", bucketRequest.Spec.BucketInstanceName) |
| 158 | + return util.ErrNotImplemented |
| 159 | +} |
| 160 | + |
| 161 | +// logOperation format and prints logs |
| 162 | +func logOperation(operation, format string, a ...interface{}) string { |
| 163 | + return fmt.Sprintf(fmt.Sprintf("%s: %s", operation, format), a...) |
| 164 | +} |
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