vendor files

vendor/k8s.io/kubernetes/pkg/kubelet/volume_host.go

@@ -0,0 +1,253 @@
+/*
+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 kubelet
+
+import (
+	"fmt"
+	"net"
+	"runtime"
+
+	"github.com/golang/glog"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/types"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/kubernetes/pkg/cloudprovider"
+	"k8s.io/kubernetes/pkg/features"
+	"k8s.io/kubernetes/pkg/kubelet/configmap"
+	"k8s.io/kubernetes/pkg/kubelet/container"
+	"k8s.io/kubernetes/pkg/kubelet/mountpod"
+	"k8s.io/kubernetes/pkg/kubelet/secret"
+	"k8s.io/kubernetes/pkg/util/io"
+	"k8s.io/kubernetes/pkg/util/mount"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+// NewInitializedVolumePluginMgr returns a new instance of
+// volume.VolumePluginMgr initialized with kubelets implementation of the
+// volume.VolumeHost interface.
+//
+// kubelet - used by VolumeHost methods to expose kubelet specific parameters
+// plugins - used to initialize volumePluginMgr
+func NewInitializedVolumePluginMgr(
+	kubelet *Kubelet,
+	secretManager secret.Manager,
+	configMapManager configmap.Manager,
+	plugins []volume.VolumePlugin,
+	prober volume.DynamicPluginProber) (*volume.VolumePluginMgr, error) {
+
+	mountPodManager, err := mountpod.NewManager(kubelet.getRootDir(), kubelet.podManager)
+	if err != nil {
+		return nil, err
+	}
+	kvh := &kubeletVolumeHost{
+		kubelet:          kubelet,
+		volumePluginMgr:  volume.VolumePluginMgr{},
+		secretManager:    secretManager,
+		configMapManager: configMapManager,
+		mountPodManager:  mountPodManager,
+	}
+
+	if err := kvh.volumePluginMgr.InitPlugins(plugins, prober, kvh); err != nil {
+		return nil, fmt.Errorf(
+			"Could not initialize volume plugins for KubeletVolumePluginMgr: %v",
+			err)
+	}
+
+	return &kvh.volumePluginMgr, nil
+}
+
+// Compile-time check to ensure kubeletVolumeHost implements the VolumeHost interface
+var _ volume.VolumeHost = &kubeletVolumeHost{}
+
+func (kvh *kubeletVolumeHost) GetPluginDir(pluginName string) string {
+	return kvh.kubelet.getPluginDir(pluginName)
+}
+
+type kubeletVolumeHost struct {
+	kubelet          *Kubelet
+	volumePluginMgr  volume.VolumePluginMgr
+	secretManager    secret.Manager
+	configMapManager configmap.Manager
+	mountPodManager  mountpod.Manager
+}
+
+func (kvh *kubeletVolumeHost) GetVolumeDevicePluginDir(pluginName string) string {
+	return kvh.kubelet.getVolumeDevicePluginDir(pluginName)
+}
+
+func (kvh *kubeletVolumeHost) GetPodVolumeDir(podUID types.UID, pluginName string, volumeName string) string {
+	dir := kvh.kubelet.getPodVolumeDir(podUID, pluginName, volumeName)
+	if runtime.GOOS == "windows" {
+		dir = volume.GetWindowsPath(dir)
+	}
+	return dir
+}
+
+func (kvh *kubeletVolumeHost) GetPodVolumeDeviceDir(podUID types.UID, pluginName string) string {
+	return kvh.kubelet.getPodVolumeDeviceDir(podUID, pluginName)
+}
+
+func (kvh *kubeletVolumeHost) GetPodPluginDir(podUID types.UID, pluginName string) string {
+	return kvh.kubelet.getPodPluginDir(podUID, pluginName)
+}
+
+func (kvh *kubeletVolumeHost) GetKubeClient() clientset.Interface {
+	return kvh.kubelet.kubeClient
+}
+
+func (kvh *kubeletVolumeHost) NewWrapperMounter(
+	volName string,
+	spec volume.Spec,
+	pod *v1.Pod,
+	opts volume.VolumeOptions) (volume.Mounter, error) {
+	// The name of wrapper volume is set to "wrapped_{wrapped_volume_name}"
+	wrapperVolumeName := "wrapped_" + volName
+	if spec.Volume != nil {
+		spec.Volume.Name = wrapperVolumeName
+	}
+
+	return kvh.kubelet.newVolumeMounterFromPlugins(&spec, pod, opts)
+}
+
+func (kvh *kubeletVolumeHost) NewWrapperUnmounter(volName string, spec volume.Spec, podUID types.UID) (volume.Unmounter, error) {
+	// The name of wrapper volume is set to "wrapped_{wrapped_volume_name}"
+	wrapperVolumeName := "wrapped_" + volName
+	if spec.Volume != nil {
+		spec.Volume.Name = wrapperVolumeName
+	}
+
+	plugin, err := kvh.kubelet.volumePluginMgr.FindPluginBySpec(&spec)
+	if err != nil {
+		return nil, err
+	}
+
+	return plugin.NewUnmounter(spec.Name(), podUID)
+}
+
+func (kvh *kubeletVolumeHost) GetCloudProvider() cloudprovider.Interface {
+	return kvh.kubelet.cloud
+}
+
+func (kvh *kubeletVolumeHost) GetMounter(pluginName string) mount.Interface {
+	exec, err := kvh.getMountExec(pluginName)
+	if err != nil {
+		glog.V(2).Info("Error finding mount pod for plugin %s: %s", pluginName, err.Error())
+		// Use the default mounter
+		exec = nil
+	}
+	if exec == nil {
+		return kvh.kubelet.mounter
+	}
+	return mount.NewExecMounter(exec, kvh.kubelet.mounter)
+}
+
+func (kvh *kubeletVolumeHost) GetWriter() io.Writer {
+	return kvh.kubelet.writer
+}
+
+func (kvh *kubeletVolumeHost) GetHostName() string {
+	return kvh.kubelet.hostname
+}
+
+func (kvh *kubeletVolumeHost) GetHostIP() (net.IP, error) {
+	return kvh.kubelet.GetHostIP()
+}
+
+func (kvh *kubeletVolumeHost) GetNodeAllocatable() (v1.ResourceList, error) {
+	node, err := kvh.kubelet.getNodeAnyWay()
+	if err != nil {
+		return nil, fmt.Errorf("error retrieving node: %v", err)
+	}
+	return node.Status.Allocatable, nil
+}
+
+func (kvh *kubeletVolumeHost) GetSecretFunc() func(namespace, name string) (*v1.Secret, error) {
+	return kvh.secretManager.GetSecret
+}
+
+func (kvh *kubeletVolumeHost) GetConfigMapFunc() func(namespace, name string) (*v1.ConfigMap, error) {
+	return kvh.configMapManager.GetConfigMap
+}
+
+func (kvh *kubeletVolumeHost) GetNodeLabels() (map[string]string, error) {
+	node, err := kvh.kubelet.GetNode()
+	if err != nil {
+		return nil, fmt.Errorf("error retrieving node: %v", err)
+	}
+	return node.Labels, nil
+}
+
+func (kvh *kubeletVolumeHost) GetNodeName() types.NodeName {
+	return kvh.kubelet.nodeName
+}
+
+func (kvh *kubeletVolumeHost) GetExec(pluginName string) mount.Exec {
+	exec, err := kvh.getMountExec(pluginName)
+	if err != nil {
+		glog.V(2).Info("Error finding mount pod for plugin %s: %s", pluginName, err.Error())
+		// Use the default exec
+		exec = nil
+	}
+	if exec == nil {
+		return mount.NewOsExec()
+	}
+	return exec
+}
+
+// getMountExec returns mount.Exec implementation that leads to pod with mount
+// utilities. It returns nil,nil when there is no such pod and default mounter /
+// os.Exec should be used.
+func (kvh *kubeletVolumeHost) getMountExec(pluginName string) (mount.Exec, error) {
+	if !utilfeature.DefaultFeatureGate.Enabled(features.MountContainers) {
+		glog.V(5).Infof("using default mounter/exec for %s", pluginName)
+		return nil, nil
+	}
+
+	pod, container, err := kvh.mountPodManager.GetMountPod(pluginName)
+	if err != nil {
+		return nil, err
+	}
+	if pod == nil {
+		// Use default mounter/exec for this plugin
+		glog.V(5).Infof("using default mounter/exec for %s", pluginName)
+		return nil, nil
+	}
+	glog.V(5).Infof("using container %s/%s/%s to execute mount utilites for %s", pod.Namespace, pod.Name, container, pluginName)
+	return &containerExec{
+		pod:           pod,
+		containerName: container,
+		kl:            kvh.kubelet,
+	}, nil
+}
+
+// containerExec is implementation of mount.Exec that executes commands in given
+// container in given pod.
+type containerExec struct {
+	pod           *v1.Pod
+	containerName string
+	kl            *Kubelet
+}
+
+var _ mount.Exec = &containerExec{}
+
+func (e *containerExec) Run(cmd string, args ...string) ([]byte, error) {
+	cmdline := append([]string{cmd}, args...)
+	glog.V(5).Infof("Exec mounter running in pod %s/%s/%s: %v", e.pod.Namespace, e.pod.Name, e.containerName, cmdline)
+	return e.kl.RunInContainer(container.GetPodFullName(e.pod), e.pod.UID, e.containerName, cmdline)
+}