Replace godep with dep

vendor/k8s.io/kubernetes/pkg/volume/cinder/cinder_util.go

@@ -0,0 +1,246 @@
+/*
+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 cinder
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/golang/glog"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/util/sets"
+	clientset "k8s.io/client-go/kubernetes"
+	kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
+	"k8s.io/kubernetes/pkg/volume"
+	"k8s.io/utils/exec"
+)
+
+type CinderDiskUtil struct{}
+
+// Attaches a disk specified by a volume.CinderPersistenDisk to the current kubelet.
+// Mounts the disk to its global path.
+func (util *CinderDiskUtil) AttachDisk(b *cinderVolumeMounter, globalPDPath string) error {
+	options := []string{}
+	if b.readOnly {
+		options = append(options, "ro")
+	}
+	cloud, err := b.plugin.getCloudProvider()
+	if err != nil {
+		return err
+	}
+	instanceid, err := cloud.InstanceID()
+	if err != nil {
+		return err
+	}
+	diskid, err := cloud.AttachDisk(instanceid, b.pdName)
+	if err != nil {
+		return err
+	}
+
+	var devicePath string
+	numTries := 0
+	for {
+		devicePath = cloud.GetDevicePath(diskid)
+		probeAttachedVolume()
+
+		_, err := os.Stat(devicePath)
+		if err == nil {
+			break
+		}
+		if err != nil && !os.IsNotExist(err) {
+			return err
+		}
+		numTries++
+		if numTries == 10 {
+			return errors.New("Could not attach disk: Timeout after 60s")
+		}
+		time.Sleep(time.Second * 6)
+	}
+	notmnt, err := b.mounter.IsLikelyNotMountPoint(globalPDPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err := os.MkdirAll(globalPDPath, 0750); err != nil {
+				return err
+			}
+			notmnt = true
+		} else {
+			return err
+		}
+	}
+	if notmnt {
+		err = b.blockDeviceMounter.FormatAndMount(devicePath, globalPDPath, b.fsType, options)
+		if err != nil {
+			os.Remove(globalPDPath)
+			return err
+		}
+		glog.V(2).Infof("Safe mount successful: %q\n", devicePath)
+	}
+	return nil
+}
+
+// Unmounts the device and detaches the disk from the kubelet's host machine.
+func (util *CinderDiskUtil) DetachDisk(cd *cinderVolumeUnmounter) error {
+	globalPDPath := makeGlobalPDName(cd.plugin.host, cd.pdName)
+	if err := cd.mounter.Unmount(globalPDPath); err != nil {
+		return err
+	}
+	if err := os.Remove(globalPDPath); err != nil {
+		return err
+	}
+	glog.V(2).Infof("Successfully unmounted main device: %s\n", globalPDPath)
+
+	cloud, err := cd.plugin.getCloudProvider()
+	if err != nil {
+		return err
+	}
+	instanceid, err := cloud.InstanceID()
+	if err != nil {
+		return err
+	}
+	if err = cloud.DetachDisk(instanceid, cd.pdName); err != nil {
+		return err
+	}
+	glog.V(2).Infof("Successfully detached cinder volume %s", cd.pdName)
+	return nil
+}
+
+func (util *CinderDiskUtil) DeleteVolume(cd *cinderVolumeDeleter) error {
+	cloud, err := cd.plugin.getCloudProvider()
+	if err != nil {
+		return err
+	}
+
+	if err = cloud.DeleteVolume(cd.pdName); err != nil {
+		// OpenStack cloud provider returns volume.tryAgainError when necessary,
+		// no handling needed here.
+		glog.V(2).Infof("Error deleting cinder volume %s: %v", cd.pdName, err)
+		return err
+	}
+	glog.V(2).Infof("Successfully deleted cinder volume %s", cd.pdName)
+	return nil
+}
+
+func getZonesFromNodes(kubeClient clientset.Interface) (sets.String, error) {
+	// TODO: caching, currently it is overkill because it calls this function
+	// only when it creates dynamic PV
+	zones := make(sets.String)
+	nodes, err := kubeClient.Core().Nodes().List(metav1.ListOptions{})
+	if err != nil {
+		glog.V(2).Infof("Error listing nodes")
+		return zones, err
+	}
+	for _, node := range nodes.Items {
+		if zone, ok := node.Labels[kubeletapis.LabelZoneFailureDomain]; ok {
+			zones.Insert(zone)
+		}
+	}
+	glog.V(4).Infof("zones found: %v", zones)
+	return zones, nil
+}
+
+func (util *CinderDiskUtil) CreateVolume(c *cinderVolumeProvisioner) (volumeID string, volumeSizeGB int, volumeLabels map[string]string, fstype string, err error) {
+	cloud, err := c.plugin.getCloudProvider()
+	if err != nil {
+		return "", 0, nil, "", err
+	}
+
+	capacity := c.options.PVC.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
+	volSizeBytes := capacity.Value()
+	// Cinder works with gigabytes, convert to GiB with rounding up
+	volSizeGB := int(volume.RoundUpSize(volSizeBytes, 1024*1024*1024))
+	name := volume.GenerateVolumeName(c.options.ClusterName, c.options.PVName, 255) // Cinder volume name can have up to 255 characters
+	vtype := ""
+	availability := ""
+	// Apply ProvisionerParameters (case-insensitive). We leave validation of
+	// the values to the cloud provider.
+	for k, v := range c.options.Parameters {
+		switch strings.ToLower(k) {
+		case "type":
+			vtype = v
+		case "availability":
+			availability = v
+		case volume.VolumeParameterFSType:
+			fstype = v
+		default:
+			return "", 0, nil, "", fmt.Errorf("invalid option %q for volume plugin %s", k, c.plugin.GetPluginName())
+		}
+	}
+	// TODO: implement PVC.Selector parsing
+	if c.options.PVC.Spec.Selector != nil {
+		return "", 0, nil, "", fmt.Errorf("claim.Spec.Selector is not supported for dynamic provisioning on Cinder")
+	}
+
+	if availability == "" {
+		// No zone specified, choose one randomly in the same region
+		zones, err := getZonesFromNodes(c.plugin.host.GetKubeClient())
+		if err != nil {
+			glog.V(2).Infof("error getting zone information: %v", err)
+			return "", 0, nil, "", err
+		}
+		// if we did not get any zones, lets leave it blank and gophercloud will
+		// use zone "nova" as default
+		if len(zones) > 0 {
+			availability = volume.ChooseZoneForVolume(zones, c.options.PVC.Name)
+		}
+	}
+
+	volumeID, volumeAZ, errr := cloud.CreateVolume(name, volSizeGB, vtype, availability, c.options.CloudTags)
+	if errr != nil {
+		glog.V(2).Infof("Error creating cinder volume: %v", errr)
+		return "", 0, nil, "", errr
+	}
+	glog.V(2).Infof("Successfully created cinder volume %s", volumeID)
+
+	// these are needed that pod is spawning to same AZ
+	volumeLabels = make(map[string]string)
+	volumeLabels[kubeletapis.LabelZoneFailureDomain] = volumeAZ
+
+	return volumeID, volSizeGB, volumeLabels, fstype, nil
+}
+
+func probeAttachedVolume() error {
+	// rescan scsi bus
+	scsiHostRescan()
+
+	executor := exec.New()
+	args := []string{"trigger"}
+	cmd := executor.Command("udevadm", args...)
+	_, err := cmd.CombinedOutput()
+	if err != nil {
+		glog.Errorf("error running udevadm trigger %v\n", err)
+		return err
+	}
+	glog.V(4).Infof("Successfully probed all attachments")
+	return nil
+}
+
+func scsiHostRescan() {
+	scsi_path := "/sys/class/scsi_host/"
+	if dirs, err := ioutil.ReadDir(scsi_path); err == nil {
+		for _, f := range dirs {
+			name := scsi_path + f.Name() + "/scan"
+			data := []byte("- - -")
+			ioutil.WriteFile(name, data, 0666)
+		}
+	}
+}