Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/k8s.io/kubernetes/pkg/volume/cephfs/cephfs.go

@@ -0,0 +1,463 @@
+/*
+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 cephfs
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path"
+	"runtime"
+	"strings"
+
+	"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"
+	utilstrings "k8s.io/kubernetes/pkg/util/strings"
+	"k8s.io/kubernetes/pkg/volume"
+	"k8s.io/kubernetes/pkg/volume/util"
+)
+
+// This is the primary entrypoint for volume plugins.
+func ProbeVolumePlugins() []volume.VolumePlugin {
+	return []volume.VolumePlugin{&cephfsPlugin{nil}}
+}
+
+type cephfsPlugin struct {
+	host volume.VolumeHost
+}
+
+var _ volume.VolumePlugin = &cephfsPlugin{}
+
+const (
+	cephfsPluginName = "kubernetes.io/cephfs"
+)
+
+func (plugin *cephfsPlugin) Init(host volume.VolumeHost) error {
+	plugin.host = host
+	return nil
+}
+
+func (plugin *cephfsPlugin) GetPluginName() string {
+	return cephfsPluginName
+}
+
+func (plugin *cephfsPlugin) GetVolumeName(spec *volume.Spec) (string, error) {
+	mon, _, _, _, _, err := getVolumeSource(spec)
+	if err != nil {
+		return "", err
+	}
+
+	return fmt.Sprintf("%v", mon), nil
+}
+
+func (plugin *cephfsPlugin) CanSupport(spec *volume.Spec) bool {
+	return (spec.Volume != nil && spec.Volume.CephFS != nil) || (spec.PersistentVolume != nil && spec.PersistentVolume.Spec.CephFS != nil)
+}
+
+func (plugin *cephfsPlugin) RequiresRemount() bool {
+	return false
+}
+
+func (plugin *cephfsPlugin) SupportsMountOption() bool {
+	return true
+}
+
+func (plugin *cephfsPlugin) SupportsBulkVolumeVerification() bool {
+	return false
+}
+
+func (plugin *cephfsPlugin) GetAccessModes() []v1.PersistentVolumeAccessMode {
+	return []v1.PersistentVolumeAccessMode{
+		v1.ReadWriteOnce,
+		v1.ReadOnlyMany,
+		v1.ReadWriteMany,
+	}
+}
+
+func (plugin *cephfsPlugin) NewMounter(spec *volume.Spec, pod *v1.Pod, _ volume.VolumeOptions) (volume.Mounter, error) {
+	secretName, secretNs, err := getSecretNameAndNamespace(spec, pod.Namespace)
+	if err != nil {
+		return nil, err
+	}
+	secret := ""
+	if len(secretName) > 0 && len(secretNs) > 0 {
+		// if secret is provideded, retrieve it
+		kubeClient := plugin.host.GetKubeClient()
+		if kubeClient == nil {
+			return nil, fmt.Errorf("Cannot get kube client")
+		}
+		secrets, err := kubeClient.CoreV1().Secrets(secretNs).Get(secretName, metav1.GetOptions{})
+		if err != nil {
+			err = fmt.Errorf("Couldn't get secret %v/%v err: %v", secretNs, secretName, err)
+			return nil, err
+		}
+		for name, data := range secrets.Data {
+			secret = string(data)
+			glog.V(4).Infof("found ceph secret info: %s", name)
+		}
+	}
+	return plugin.newMounterInternal(spec, pod.UID, plugin.host.GetMounter(plugin.GetPluginName()), secret)
+}
+
+func (plugin *cephfsPlugin) newMounterInternal(spec *volume.Spec, podUID types.UID, mounter mount.Interface, secret string) (volume.Mounter, error) {
+	mon, path, id, secretFile, readOnly, err := getVolumeSource(spec)
+	if err != nil {
+		return nil, err
+	}
+
+	if id == "" {
+		id = "admin"
+	}
+	if path == "" {
+		path = "/"
+	}
+	if !strings.HasPrefix(path, "/") {
+		path = "/" + path
+	}
+
+	if secretFile == "" {
+		secretFile = "/etc/ceph/" + id + ".secret"
+	}
+
+	return &cephfsMounter{
+		cephfs: &cephfs{
+			podUID:       podUID,
+			volName:      spec.Name(),
+			mon:          mon,
+			path:         path,
+			secret:       secret,
+			id:           id,
+			secret_file:  secretFile,
+			readonly:     readOnly,
+			mounter:      mounter,
+			plugin:       plugin,
+			mountOptions: util.MountOptionFromSpec(spec),
+		},
+	}, nil
+}
+
+func (plugin *cephfsPlugin) NewUnmounter(volName string, podUID types.UID) (volume.Unmounter, error) {
+	return plugin.newUnmounterInternal(volName, podUID, plugin.host.GetMounter(plugin.GetPluginName()))
+}
+
+func (plugin *cephfsPlugin) newUnmounterInternal(volName string, podUID types.UID, mounter mount.Interface) (volume.Unmounter, error) {
+	return &cephfsUnmounter{
+		cephfs: &cephfs{
+			podUID:  podUID,
+			volName: volName,
+			mounter: mounter,
+			plugin:  plugin},
+	}, nil
+}
+
+func (plugin *cephfsPlugin) ConstructVolumeSpec(volumeName, mountPath string) (*volume.Spec, error) {
+	cephfsVolume := &v1.Volume{
+		Name: volumeName,
+		VolumeSource: v1.VolumeSource{
+			CephFS: &v1.CephFSVolumeSource{
+				Monitors: []string{},
+				Path:     mountPath,
+			},
+		},
+	}
+	return volume.NewSpecFromVolume(cephfsVolume), nil
+}
+
+// CephFS volumes represent a bare host file or directory mount of an CephFS export.
+type cephfs struct {
+	volName     string
+	podUID      types.UID
+	mon         []string
+	path        string
+	id          string
+	secret      string
+	secret_file string
+	readonly    bool
+	mounter     mount.Interface
+	plugin      *cephfsPlugin
+	volume.MetricsNil
+	mountOptions []string
+}
+
+type cephfsMounter struct {
+	*cephfs
+}
+
+var _ volume.Mounter = &cephfsMounter{}
+
+func (cephfsVolume *cephfsMounter) GetAttributes() volume.Attributes {
+	return volume.Attributes{
+		ReadOnly:        cephfsVolume.readonly,
+		Managed:         false,
+		SupportsSELinux: false,
+	}
+}
+
+// Checks prior to mount operations to verify that the required components (binaries, etc.)
+// to mount the volume are available on the underlying node.
+// If not, it returns an error
+func (cephfsMounter *cephfsMounter) CanMount() error {
+	return nil
+}
+
+// SetUp attaches the disk and bind mounts to the volume path.
+func (cephfsVolume *cephfsMounter) SetUp(fsGroup *int64) error {
+	return cephfsVolume.SetUpAt(cephfsVolume.GetPath(), fsGroup)
+}
+
+// SetUpAt attaches the disk and bind mounts to the volume path.
+func (cephfsVolume *cephfsMounter) SetUpAt(dir string, fsGroup *int64) error {
+	notMnt, err := cephfsVolume.mounter.IsLikelyNotMountPoint(dir)
+	glog.V(4).Infof("CephFS mount set up: %s %v %v", dir, !notMnt, err)
+	if err != nil && !os.IsNotExist(err) {
+		return err
+	}
+	if !notMnt {
+		return nil
+	}
+
+	if err := os.MkdirAll(dir, 0750); err != nil {
+		return err
+	}
+
+	// check whether it belongs to fuse, if not, default to use kernel mount.
+	if cephfsVolume.checkFuseMount() {
+		glog.V(4).Info("CephFS fuse mount.")
+		err = cephfsVolume.execFuseMount(dir)
+		// cleanup no matter if fuse mount fail.
+		keyringPath := cephfsVolume.GetKeyringPath()
+		_, StatErr := os.Stat(keyringPath)
+		if !os.IsNotExist(StatErr) {
+			os.RemoveAll(keyringPath)
+		}
+		if err == nil {
+			// cephfs fuse mount succeeded.
+			return nil
+		} else {
+			// if cephfs fuse mount failed, fallback to kernel mount.
+			glog.V(4).Infof("CephFS fuse mount failed: %v, fallback to kernel mount.", err)
+		}
+	}
+	glog.V(4).Info("CephFS kernel mount.")
+
+	err = cephfsVolume.execMount(dir)
+	if err != nil {
+		// cleanup upon failure.
+		util.UnmountPath(dir, cephfsVolume.mounter)
+		return err
+	}
+	return nil
+}
+
+type cephfsUnmounter struct {
+	*cephfs
+}
+
+var _ volume.Unmounter = &cephfsUnmounter{}
+
+// TearDown unmounts the bind mount
+func (cephfsVolume *cephfsUnmounter) TearDown() error {
+	return cephfsVolume.TearDownAt(cephfsVolume.GetPath())
+}
+
+// TearDownAt unmounts the bind mount
+func (cephfsVolume *cephfsUnmounter) TearDownAt(dir string) error {
+	return util.UnmountPath(dir, cephfsVolume.mounter)
+}
+
+// GetPath creates global mount path
+func (cephfsVolume *cephfs) GetPath() string {
+	name := cephfsPluginName
+	return cephfsVolume.plugin.host.GetPodVolumeDir(cephfsVolume.podUID, utilstrings.EscapeQualifiedNameForDisk(name), cephfsVolume.volName)
+}
+
+// GetKeyringPath creates cephfuse keyring path
+func (cephfsVolume *cephfs) GetKeyringPath() string {
+	name := cephfsPluginName
+	volumeDir := cephfsVolume.plugin.host.GetPodVolumeDir(cephfsVolume.podUID, utilstrings.EscapeQualifiedNameForDisk(name), cephfsVolume.volName)
+	volumeKeyringDir := volumeDir + "~keyring"
+	return volumeKeyringDir
+}
+
+func (cephfsVolume *cephfs) execMount(mountpoint string) error {
+	// cephfs mount option
+	ceph_opt := ""
+	// override secretfile if secret is provided
+	if cephfsVolume.secret != "" {
+		ceph_opt = "name=" + cephfsVolume.id + ",secret=" + cephfsVolume.secret
+	} else {
+		ceph_opt = "name=" + cephfsVolume.id + ",secretfile=" + cephfsVolume.secret_file
+	}
+	// build option array
+	opt := []string{}
+	if cephfsVolume.readonly {
+		opt = append(opt, "ro")
+	}
+	opt = append(opt, ceph_opt)
+
+	// build src like mon1:6789,mon2:6789,mon3:6789:/
+	hosts := cephfsVolume.mon
+	l := len(hosts)
+	// pass all monitors and let ceph randomize and fail over
+	i := 0
+	src := ""
+	for i = 0; i < l-1; i++ {
+		src += hosts[i] + ","
+	}
+	src += hosts[i] + ":" + cephfsVolume.path
+
+	mountOptions := util.JoinMountOptions(cephfsVolume.mountOptions, opt)
+	if err := cephfsVolume.mounter.Mount(src, mountpoint, "ceph", mountOptions); err != nil {
+		return fmt.Errorf("CephFS: mount failed: %v", err)
+	}
+
+	return nil
+}
+
+func (cephfsMounter *cephfsMounter) checkFuseMount() bool {
+	execute := cephfsMounter.plugin.host.GetExec(cephfsMounter.plugin.GetPluginName())
+	switch runtime.GOOS {
+	case "linux":
+		if _, err := execute.Run("/usr/bin/test", "-x", "/sbin/mount.fuse.ceph"); err == nil {
+			glog.V(4).Info("/sbin/mount.fuse.ceph exists, it should be fuse mount.")
+			return true
+		}
+		return false
+	}
+	return false
+}
+
+func (cephfsVolume *cephfs) execFuseMount(mountpoint string) error {
+	// cephfs keyring file
+	keyring_file := ""
+	// override secretfile if secret is provided
+	if cephfsVolume.secret != "" {
+		// TODO: cephfs fuse currently doesn't support secret option,
+		// remove keyring file create once secret option is supported.
+		glog.V(4).Info("cephfs mount begin using fuse.")
+
+		keyringPath := cephfsVolume.GetKeyringPath()
+		os.MkdirAll(keyringPath, 0750)
+
+		payload := make(map[string]util.FileProjection, 1)
+		var fileProjection util.FileProjection
+
+		keyring := fmt.Sprintf("[client.%s]\nkey = %s\n", cephfsVolume.id, cephfsVolume.secret)
+
+		fileProjection.Data = []byte(keyring)
+		fileProjection.Mode = int32(0644)
+		fileName := cephfsVolume.id + ".keyring"
+
+		payload[fileName] = fileProjection
+
+		writerContext := fmt.Sprintf("cephfuse:%v.keyring", cephfsVolume.id)
+		writer, err := util.NewAtomicWriter(keyringPath, writerContext)
+		if err != nil {
+			glog.Errorf("failed to create atomic writer: %v", err)
+			return err
+		}
+
+		err = writer.Write(payload)
+		if err != nil {
+			glog.Errorf("failed to write payload to dir: %v", err)
+			return err
+		}
+
+		keyring_file = path.Join(keyringPath, fileName)
+
+	} else {
+		keyring_file = cephfsVolume.secret_file
+	}
+
+	// build src like mon1:6789,mon2:6789,mon3:6789:/
+	hosts := cephfsVolume.mon
+	l := len(hosts)
+	// pass all monitors and let ceph randomize and fail over
+	i := 0
+	src := ""
+	for i = 0; i < l-1; i++ {
+		src += hosts[i] + ","
+	}
+	src += hosts[i]
+
+	mountArgs := []string{}
+	mountArgs = append(mountArgs, "-k")
+	mountArgs = append(mountArgs, keyring_file)
+	mountArgs = append(mountArgs, "-m")
+	mountArgs = append(mountArgs, src)
+	mountArgs = append(mountArgs, mountpoint)
+	mountArgs = append(mountArgs, "-r")
+	mountArgs = append(mountArgs, cephfsVolume.path)
+	mountArgs = append(mountArgs, "--id")
+	mountArgs = append(mountArgs, cephfsVolume.id)
+
+	glog.V(4).Infof("Mounting cmd ceph-fuse with arguments (%s)", mountArgs)
+	command := exec.Command("ceph-fuse", mountArgs...)
+	output, err := command.CombinedOutput()
+	if err != nil || !(strings.Contains(string(output), "starting fuse")) {
+		return fmt.Errorf("Ceph-fuse failed: %v\narguments: %s\nOutput: %s\n", err, mountArgs, string(output))
+	}
+
+	return nil
+}
+
+func getVolumeSource(spec *volume.Spec) ([]string, string, string, string, bool, error) {
+	if spec.Volume != nil && spec.Volume.CephFS != nil {
+		mon := spec.Volume.CephFS.Monitors
+		path := spec.Volume.CephFS.Path
+		user := spec.Volume.CephFS.User
+		secretFile := spec.Volume.CephFS.SecretFile
+		readOnly := spec.Volume.CephFS.ReadOnly
+		return mon, path, user, secretFile, readOnly, nil
+	} else if spec.PersistentVolume != nil &&
+		spec.PersistentVolume.Spec.CephFS != nil {
+		mon := spec.PersistentVolume.Spec.CephFS.Monitors
+		path := spec.PersistentVolume.Spec.CephFS.Path
+		user := spec.PersistentVolume.Spec.CephFS.User
+		secretFile := spec.PersistentVolume.Spec.CephFS.SecretFile
+		readOnly := spec.PersistentVolume.Spec.CephFS.ReadOnly
+		return mon, path, user, secretFile, readOnly, nil
+	}
+
+	return nil, "", "", "", false, fmt.Errorf("Spec does not reference a CephFS volume type")
+}
+
+func getSecretNameAndNamespace(spec *volume.Spec, defaultNamespace string) (string, string, error) {
+	if spec.Volume != nil && spec.Volume.CephFS != nil {
+		localSecretRef := spec.Volume.CephFS.SecretRef
+		if localSecretRef != nil {
+			return localSecretRef.Name, defaultNamespace, nil
+		}
+		return "", "", nil
+
+	} else if spec.PersistentVolume != nil &&
+		spec.PersistentVolume.Spec.CephFS != nil {
+		secretRef := spec.PersistentVolume.Spec.CephFS.SecretRef
+		secretNs := defaultNamespace
+		if secretRef != nil {
+			if len(secretRef.Namespace) != 0 {
+				secretNs = secretRef.Namespace
+			}
+			return secretRef.Name, secretNs, nil
+		}
+		return "", "", nil
+	}
+	return "", "", fmt.Errorf("Spec does not reference an CephFS volume type")
+}