Refactor flocker volume plugin

* Support provisioning
* Support deletion
* Use bind mounts instead of /flocker in containers
* support ownership management or SELinux relabeling.

pkg/volume/flocker/flocker_volume.go

@@ -0,0 +1,102 @@
+/*
+Copyright 2015 The Kubernetes Authors.
+
+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 flocker
+
+import (
+	"fmt"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/api/resource"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+type volumeManager interface {
+	// Creates a volume
+	CreateVolume(provisioner *flockerVolumeProvisioner) (datasetUUID string, volumeSizeGB int, labels map[string]string, err error)
+	// Deletes a volume
+	DeleteVolume(deleter *flockerVolumeDeleter) error
+}
+
+type flockerVolumeDeleter struct {
+	*flockerVolume
+}
+
+var _ volume.Deleter = &flockerVolumeDeleter{}
+
+func (b *flockerVolumeDeleter) GetPath() string {
+	return getPath(b.podUID, b.volName, b.plugin.host)
+}
+
+func (d *flockerVolumeDeleter) Delete() error {
+	return d.manager.DeleteVolume(d)
+}
+
+type flockerVolumeProvisioner struct {
+	*flockerVolume
+	options volume.VolumeOptions
+}
+
+var _ volume.Provisioner = &flockerVolumeProvisioner{}
+
+func (c *flockerVolumeProvisioner) Provision() (*api.PersistentVolume, error) {
+
+	if len(c.options.Parameters) > 0 {
+		return nil, fmt.Errorf("Provisioning failed: Specified at least one unsupported parameter")
+	}
+
+	if c.options.Selector != nil {
+		return nil, fmt.Errorf("Provisioning failed: Specified unsupported selector")
+	}
+
+	datasetUUID, sizeGB, labels, err := c.manager.CreateVolume(c)
+	if err != nil {
+		return nil, err
+	}
+
+	pv := &api.PersistentVolume{
+		ObjectMeta: api.ObjectMeta{
+			Name:   c.options.PVName,
+			Labels: map[string]string{},
+			Annotations: map[string]string{
+				"kubernetes.io/createdby": "flocker-dynamic-provisioner",
+			},
+		},
+		Spec: api.PersistentVolumeSpec{
+			PersistentVolumeReclaimPolicy: c.options.PersistentVolumeReclaimPolicy,
+			AccessModes:                   c.options.AccessModes,
+			Capacity: api.ResourceList{
+				api.ResourceName(api.ResourceStorage): resource.MustParse(fmt.Sprintf("%dGi", sizeGB)),
+			},
+			PersistentVolumeSource: api.PersistentVolumeSource{
+				Flocker: &api.FlockerVolumeSource{
+					DatasetUUID: datasetUUID,
+				},
+			},
+		},
+	}
+
+	if len(labels) != 0 {
+		if pv.Labels == nil {
+			pv.Labels = make(map[string]string)
+		}
+		for k, v := range labels {
+			pv.Labels[k] = v
+		}
+	}
+
+	return pv, nil
+}