Switch to github.com/golang/dep for vendoring

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

vendor/k8s.io/kubernetes/pkg/volume/gce_pd/attacher.go

@@ -0,0 +1,275 @@
+/*
+Copyright 2016 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 gce_pd
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"path/filepath"
+	"strconv"
+	"time"
+
+	"github.com/golang/glog"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
+	"k8s.io/kubernetes/pkg/util/exec"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+	volumeutil "k8s.io/kubernetes/pkg/volume/util"
+)
+
+type gcePersistentDiskAttacher struct {
+	host     volume.VolumeHost
+	gceDisks gce.Disks
+}
+
+var _ volume.Attacher = &gcePersistentDiskAttacher{}
+
+var _ volume.AttachableVolumePlugin = &gcePersistentDiskPlugin{}
+
+func (plugin *gcePersistentDiskPlugin) NewAttacher() (volume.Attacher, error) {
+	gceCloud, err := getCloudProvider(plugin.host.GetCloudProvider())
+	if err != nil {
+		return nil, err
+	}
+
+	return &gcePersistentDiskAttacher{
+		host:     plugin.host,
+		gceDisks: gceCloud,
+	}, nil
+}
+
+func (plugin *gcePersistentDiskPlugin) GetDeviceMountRefs(deviceMountPath string) ([]string, error) {
+	mounter := plugin.host.GetMounter()
+	return mount.GetMountRefs(mounter, deviceMountPath)
+}
+
+// Attach checks with the GCE cloud provider if the specified volume is already
+// attached to the node with the specified Name.
+// If the volume is attached, it succeeds (returns nil).
+// If it is not, Attach issues a call to the GCE cloud provider to attach it.
+// Callers are responsible for retrying on failure.
+// Callers are responsible for thread safety between concurrent attach and
+// detach operations.
+func (attacher *gcePersistentDiskAttacher) Attach(spec *volume.Spec, nodeName types.NodeName) (string, error) {
+	volumeSource, readOnly, err := getVolumeSource(spec)
+	if err != nil {
+		return "", err
+	}
+
+	pdName := volumeSource.PDName
+
+	attached, err := attacher.gceDisks.DiskIsAttached(pdName, nodeName)
+	if err != nil {
+		// Log error and continue with attach
+		glog.Errorf(
+			"Error checking if PD (%q) is already attached to current node (%q). Will continue and try attach anyway. err=%v",
+			pdName, nodeName, err)
+	}
+
+	if err == nil && attached {
+		// Volume is already attached to node.
+		glog.Infof("Attach operation is successful. PD %q is already attached to node %q.", pdName, nodeName)
+	} else {
+		if err := attacher.gceDisks.AttachDisk(pdName, nodeName, readOnly); err != nil {
+			glog.Errorf("Error attaching PD %q to node %q: %+v", pdName, nodeName, err)
+			return "", err
+		}
+	}
+
+	return path.Join(diskByIdPath, diskGooglePrefix+pdName), nil
+}
+
+func (attacher *gcePersistentDiskAttacher) VolumesAreAttached(specs []*volume.Spec, nodeName types.NodeName) (map[*volume.Spec]bool, error) {
+	volumesAttachedCheck := make(map[*volume.Spec]bool)
+	volumePdNameMap := make(map[string]*volume.Spec)
+	pdNameList := []string{}
+	for _, spec := range specs {
+		volumeSource, _, err := getVolumeSource(spec)
+		// If error is occured, skip this volume and move to the next one
+		if err != nil {
+			glog.Errorf("Error getting volume (%q) source : %v", spec.Name(), err)
+			continue
+		}
+		pdNameList = append(pdNameList, volumeSource.PDName)
+		volumesAttachedCheck[spec] = true
+		volumePdNameMap[volumeSource.PDName] = spec
+	}
+	attachedResult, err := attacher.gceDisks.DisksAreAttached(pdNameList, nodeName)
+	if err != nil {
+		// Log error and continue with attach
+		glog.Errorf(
+			"Error checking if PDs (%v) are already attached to current node (%q). err=%v",
+			pdNameList, nodeName, err)
+		return volumesAttachedCheck, err
+	}
+
+	for pdName, attached := range attachedResult {
+		if !attached {
+			spec := volumePdNameMap[pdName]
+			volumesAttachedCheck[spec] = false
+			glog.V(2).Infof("VolumesAreAttached: check volume %q (specName: %q) is no longer attached", pdName, spec.Name())
+		}
+	}
+	return volumesAttachedCheck, nil
+}
+
+func (attacher *gcePersistentDiskAttacher) WaitForAttach(spec *volume.Spec, devicePath string, timeout time.Duration) (string, error) {
+	ticker := time.NewTicker(checkSleepDuration)
+	defer ticker.Stop()
+	timer := time.NewTimer(timeout)
+	defer timer.Stop()
+
+	volumeSource, _, err := getVolumeSource(spec)
+	if err != nil {
+		return "", err
+	}
+
+	pdName := volumeSource.PDName
+	partition := ""
+	if volumeSource.Partition != 0 {
+		partition = strconv.Itoa(int(volumeSource.Partition))
+	}
+
+	sdBefore, err := filepath.Glob(diskSDPattern)
+	if err != nil {
+		glog.Errorf("Error filepath.Glob(\"%s\"): %v\r\n", diskSDPattern, err)
+	}
+	sdBeforeSet := sets.NewString(sdBefore...)
+
+	devicePaths := getDiskByIdPaths(pdName, partition)
+	for {
+		select {
+		case <-ticker.C:
+			glog.V(5).Infof("Checking GCE PD %q is attached.", pdName)
+			path, err := verifyDevicePath(devicePaths, sdBeforeSet)
+			if err != nil {
+				// Log error, if any, and continue checking periodically. See issue #11321
+				glog.Errorf("Error verifying GCE PD (%q) is attached: %v", pdName, err)
+			} else if path != "" {
+				// A device path has successfully been created for the PD
+				glog.Infof("Successfully found attached GCE PD %q.", pdName)
+				return path, nil
+			}
+		case <-timer.C:
+			return "", fmt.Errorf("Could not find attached GCE PD %q. Timeout waiting for mount paths to be created.", pdName)
+		}
+	}
+}
+
+func (attacher *gcePersistentDiskAttacher) GetDeviceMountPath(
+	spec *volume.Spec) (string, error) {
+	volumeSource, _, err := getVolumeSource(spec)
+	if err != nil {
+		return "", err
+	}
+
+	return makeGlobalPDName(attacher.host, volumeSource.PDName), nil
+}
+
+func (attacher *gcePersistentDiskAttacher) MountDevice(spec *volume.Spec, devicePath string, deviceMountPath string) error {
+	// Only mount the PD globally once.
+	mounter := attacher.host.GetMounter()
+	notMnt, err := mounter.IsLikelyNotMountPoint(deviceMountPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			if err := os.MkdirAll(deviceMountPath, 0750); err != nil {
+				return err
+			}
+			notMnt = true
+		} else {
+			return err
+		}
+	}
+
+	volumeSource, readOnly, err := getVolumeSource(spec)
+	if err != nil {
+		return err
+	}
+
+	options := []string{}
+	if readOnly {
+		options = append(options, "ro")
+	}
+	if notMnt {
+		diskMounter := &mount.SafeFormatAndMount{Interface: mounter, Runner: exec.New()}
+		err = diskMounter.FormatAndMount(devicePath, deviceMountPath, volumeSource.FSType, options)
+		if err != nil {
+			os.Remove(deviceMountPath)
+			return err
+		}
+		glog.V(4).Infof("formatting spec %v devicePath %v deviceMountPath %v fs %v with options %+v", spec.Name(), devicePath, deviceMountPath, volumeSource.FSType, options)
+	}
+	return nil
+}
+
+type gcePersistentDiskDetacher struct {
+	host     volume.VolumeHost
+	gceDisks gce.Disks
+}
+
+var _ volume.Detacher = &gcePersistentDiskDetacher{}
+
+func (plugin *gcePersistentDiskPlugin) NewDetacher() (volume.Detacher, error) {
+	gceCloud, err := getCloudProvider(plugin.host.GetCloudProvider())
+	if err != nil {
+		return nil, err
+	}
+
+	return &gcePersistentDiskDetacher{
+		host:     plugin.host,
+		gceDisks: gceCloud,
+	}, nil
+}
+
+// Detach checks with the GCE cloud provider if the specified volume is already
+// attached to the specified node. If the volume is not attached, it succeeds
+// (returns nil). If it is attached, Detach issues a call to the GCE cloud
+// provider to attach it.
+// Callers are responsible for retrying on failure.
+// Callers are responsible for thread safety between concurrent attach and detach
+// operations.
+func (detacher *gcePersistentDiskDetacher) Detach(deviceMountPath string, nodeName types.NodeName) error {
+	pdName := path.Base(deviceMountPath)
+
+	attached, err := detacher.gceDisks.DiskIsAttached(pdName, nodeName)
+	if err != nil {
+		// Log error and continue with detach
+		glog.Errorf(
+			"Error checking if PD (%q) is already attached to current node (%q). Will continue and try detach anyway. err=%v",
+			pdName, nodeName, err)
+	}
+
+	if err == nil && !attached {
+		// Volume is not attached to node. Success!
+		glog.Infof("Detach operation is successful. PD %q was not attached to node %q.", pdName, nodeName)
+		return nil
+	}
+
+	if err = detacher.gceDisks.DetachDisk(pdName, nodeName); err != nil {
+		glog.Errorf("Error detaching PD %q from node %q: %v", pdName, nodeName, err)
+		return err
+	}
+
+	return nil
+}
+
+func (detacher *gcePersistentDiskDetacher) UnmountDevice(deviceMountPath string) error {
+	return volumeutil.UnmountPath(deviceMountPath, detacher.host.GetMounter())
+}