vendor files

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

@@ -0,0 +1,265 @@
+/*
+Copyright 2017 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 iscsi
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+	"time"
+
+	"github.com/golang/glog"
+	"k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+	volumeutil "k8s.io/kubernetes/pkg/volume/util"
+)
+
+type iscsiAttacher struct {
+	host    volume.VolumeHost
+	manager diskManager
+}
+
+var _ volume.Attacher = &iscsiAttacher{}
+
+var _ volume.AttachableVolumePlugin = &iscsiPlugin{}
+
+func (plugin *iscsiPlugin) NewAttacher() (volume.Attacher, error) {
+	return &iscsiAttacher{
+		host:    plugin.host,
+		manager: &ISCSIUtil{},
+	}, nil
+}
+
+func (plugin *iscsiPlugin) GetDeviceMountRefs(deviceMountPath string) ([]string, error) {
+	mounter := plugin.host.GetMounter(iscsiPluginName)
+	return mount.GetMountRefs(mounter, deviceMountPath)
+}
+
+func (attacher *iscsiAttacher) Attach(spec *volume.Spec, nodeName types.NodeName) (string, error) {
+	return "", nil
+}
+
+func (attacher *iscsiAttacher) VolumesAreAttached(specs []*volume.Spec, nodeName types.NodeName) (map[*volume.Spec]bool, error) {
+	volumesAttachedCheck := make(map[*volume.Spec]bool)
+	for _, spec := range specs {
+		volumesAttachedCheck[spec] = true
+	}
+
+	return volumesAttachedCheck, nil
+}
+
+func (attacher *iscsiAttacher) WaitForAttach(spec *volume.Spec, devicePath string, pod *v1.Pod, timeout time.Duration) (string, error) {
+	mounter, err := attacher.volumeSpecToMounter(spec, attacher.host, pod)
+	if err != nil {
+		glog.Warningf("failed to get iscsi mounter: %v", err)
+		return "", err
+	}
+	return attacher.manager.AttachDisk(*mounter)
+}
+
+func (attacher *iscsiAttacher) GetDeviceMountPath(
+	spec *volume.Spec) (string, error) {
+	mounter, err := attacher.volumeSpecToMounter(spec, attacher.host, nil)
+	if err != nil {
+		glog.Warningf("failed to get iscsi mounter: %v", err)
+		return "", err
+	}
+	if mounter.InitiatorName != "" {
+		// new iface name is <target portal>:<volume name>
+		mounter.Iface = mounter.Portals[0] + ":" + mounter.VolName
+	}
+	return attacher.manager.MakeGlobalPDName(*mounter.iscsiDisk), nil
+}
+
+func (attacher *iscsiAttacher) MountDevice(spec *volume.Spec, devicePath string, deviceMountPath string) error {
+	mounter := attacher.host.GetMounter(iscsiPluginName)
+	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
+		}
+	}
+	readOnly, fsType, err := getISCSIVolumeInfo(spec)
+	if err != nil {
+		return err
+	}
+
+	options := []string{}
+	if readOnly {
+		options = append(options, "ro")
+	}
+	if notMnt {
+		diskMounter := &mount.SafeFormatAndMount{Interface: mounter, Exec: attacher.host.GetExec(iscsiPluginName)}
+		mountOptions := volume.MountOptionFromSpec(spec, options...)
+		err = diskMounter.FormatAndMount(devicePath, deviceMountPath, fsType, mountOptions)
+		if err != nil {
+			os.Remove(deviceMountPath)
+			return err
+		}
+	}
+	return nil
+}
+
+type iscsiDetacher struct {
+	host    volume.VolumeHost
+	mounter mount.Interface
+	manager diskManager
+}
+
+var _ volume.Detacher = &iscsiDetacher{}
+
+func (plugin *iscsiPlugin) NewDetacher() (volume.Detacher, error) {
+	return &iscsiDetacher{
+		host:    plugin.host,
+		mounter: plugin.host.GetMounter(iscsiPluginName),
+		manager: &ISCSIUtil{},
+	}, nil
+}
+
+func (detacher *iscsiDetacher) Detach(volumeName string, nodeName types.NodeName) error {
+	return nil
+}
+
+func (detacher *iscsiDetacher) UnmountDevice(deviceMountPath string) error {
+	unMounter := detacher.volumeSpecToUnmounter(detacher.mounter)
+	err := detacher.manager.DetachDisk(*unMounter, deviceMountPath)
+	if err != nil {
+		return fmt.Errorf("iscsi: failed to detach disk: %s\nError: %v", deviceMountPath, err)
+	}
+	glog.V(4).Infof("iscsi: %q is unmounted, deleting the directory", deviceMountPath)
+	err = os.RemoveAll(deviceMountPath)
+	if err != nil {
+		return fmt.Errorf("iscsi: failed to delete the directory: %s\nError: %v", deviceMountPath, err)
+	}
+	glog.V(4).Infof("iscsi: successfully detached disk: %s", deviceMountPath)
+	return nil
+}
+
+func (attacher *iscsiAttacher) volumeSpecToMounter(spec *volume.Spec, host volume.VolumeHost, pod *v1.Pod) (*iscsiDiskMounter, error) {
+	var secret map[string]string
+	var bkportal []string
+	readOnly, fsType, err := getISCSIVolumeInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	if pod != nil {
+		chapDiscovery, err := getISCSIDiscoveryCHAPInfo(spec)
+		if err != nil {
+			return nil, err
+		}
+		chapSession, err := getISCSISessionCHAPInfo(spec)
+		if err != nil {
+			return nil, err
+		}
+		if chapDiscovery || chapSession {
+			secretName, secretNamespace, err := getISCSISecretNameAndNamespace(spec, pod.Namespace)
+			if err != nil {
+				return nil, err
+			}
+			if len(secretNamespace) == 0 || len(secretName) == 0 {
+				return nil, fmt.Errorf("CHAP enabled but secret name or namespace is empty")
+			}
+			// if secret is provided, retrieve it
+			kubeClient := host.GetKubeClient()
+			if kubeClient == nil {
+				return nil, fmt.Errorf("Cannot get kube client")
+			}
+			secretObj, err := kubeClient.Core().Secrets(secretNamespace).Get(secretName, metav1.GetOptions{})
+			if err != nil {
+				err = fmt.Errorf("Couldn't get secret %v/%v error: %v", secretNamespace, secretName, err)
+				return nil, err
+			}
+			secret = make(map[string]string)
+			for name, data := range secretObj.Data {
+				glog.V(6).Infof("retrieving CHAP secret name: %s", name)
+				secret[name] = string(data)
+			}
+		}
+
+	}
+	tp, portals, iqn, lunStr, err := getISCSITargetInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	lun := strconv.Itoa(int(lunStr))
+	portal := portalMounter(tp)
+	bkportal = append(bkportal, portal)
+	for _, p := range portals {
+		bkportal = append(bkportal, portalMounter(string(p)))
+	}
+
+	iface, initiatorNamePtr, err := getISCSIInitiatorInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	var initiatorName string
+	if initiatorNamePtr != nil {
+		initiatorName = *initiatorNamePtr
+	}
+	chapDiscovery, err := getISCSIDiscoveryCHAPInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	chapSession, err := getISCSISessionCHAPInfo(spec)
+	if err != nil {
+		return nil, err
+	}
+	exec := attacher.host.GetExec(iscsiPluginName)
+
+	return &iscsiDiskMounter{
+		iscsiDisk: &iscsiDisk{
+			plugin: &iscsiPlugin{
+				host: host,
+			},
+			VolName:        spec.Name(),
+			Portals:        bkportal,
+			Iqn:            iqn,
+			lun:            lun,
+			Iface:          iface,
+			chap_discovery: chapDiscovery,
+			chap_session:   chapSession,
+			secret:         secret,
+			InitiatorName:  initiatorName,
+			manager:        &ISCSIUtil{}},
+		fsType:     fsType,
+		readOnly:   readOnly,
+		mounter:    &mount.SafeFormatAndMount{Interface: host.GetMounter(iscsiPluginName), Exec: exec},
+		exec:       exec,
+		deviceUtil: volumeutil.NewDeviceHandler(volumeutil.NewIOHandler()),
+	}, nil
+}
+
+func (detacher *iscsiDetacher) volumeSpecToUnmounter(mounter mount.Interface) *iscsiDiskUnmounter {
+	exec := detacher.host.GetExec(iscsiPluginName)
+	return &iscsiDiskUnmounter{
+		iscsiDisk: &iscsiDisk{
+			plugin: &iscsiPlugin{},
+		},
+		mounter: mounter,
+		exec:    exec,
+	}
+}