272 lines
8.4 KiB
Go
272 lines
8.4 KiB
Go
/*
|
|
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 util
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"os"
|
|
"path"
|
|
|
|
"strings"
|
|
|
|
"github.com/golang/glog"
|
|
"k8s.io/api/core/v1"
|
|
storage "k8s.io/api/storage/v1"
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/labels"
|
|
"k8s.io/apimachinery/pkg/runtime"
|
|
"k8s.io/apimachinery/pkg/util/sets"
|
|
clientset "k8s.io/client-go/kubernetes"
|
|
"k8s.io/kubernetes/pkg/api"
|
|
v1helper "k8s.io/kubernetes/pkg/api/v1/helper"
|
|
kubeletapis "k8s.io/kubernetes/pkg/kubelet/apis"
|
|
"k8s.io/kubernetes/pkg/util/mount"
|
|
)
|
|
|
|
const readyFileName = "ready"
|
|
|
|
// IsReady checks for the existence of a regular file
|
|
// called 'ready' in the given directory and returns
|
|
// true if that file exists.
|
|
func IsReady(dir string) bool {
|
|
readyFile := path.Join(dir, readyFileName)
|
|
s, err := os.Stat(readyFile)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
if !s.Mode().IsRegular() {
|
|
glog.Errorf("ready-file is not a file: %s", readyFile)
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
// SetReady creates a file called 'ready' in the given
|
|
// directory. It logs an error if the file cannot be
|
|
// created.
|
|
func SetReady(dir string) {
|
|
if err := os.MkdirAll(dir, 0750); err != nil && !os.IsExist(err) {
|
|
glog.Errorf("Can't mkdir %s: %v", dir, err)
|
|
return
|
|
}
|
|
|
|
readyFile := path.Join(dir, readyFileName)
|
|
file, err := os.Create(readyFile)
|
|
if err != nil {
|
|
glog.Errorf("Can't touch %s: %v", readyFile, err)
|
|
return
|
|
}
|
|
file.Close()
|
|
}
|
|
|
|
// UnmountPath is a common unmount routine that unmounts the given path and
|
|
// deletes the remaining directory if successful.
|
|
func UnmountPath(mountPath string, mounter mount.Interface) error {
|
|
return UnmountMountPoint(mountPath, mounter, false /* extensiveMountPointCheck */)
|
|
}
|
|
|
|
// UnmountMountPoint is a common unmount routine that unmounts the given path and
|
|
// deletes the remaining directory if successful.
|
|
// if extensiveMountPointCheck is true
|
|
// IsNotMountPoint will be called instead of IsLikelyNotMountPoint.
|
|
// IsNotMountPoint is more expensive but properly handles bind mounts.
|
|
func UnmountMountPoint(mountPath string, mounter mount.Interface, extensiveMountPointCheck bool) error {
|
|
if pathExists, pathErr := PathExists(mountPath); pathErr != nil {
|
|
return fmt.Errorf("Error checking if path exists: %v", pathErr)
|
|
} else if !pathExists {
|
|
glog.Warningf("Warning: Unmount skipped because path does not exist: %v", mountPath)
|
|
return nil
|
|
}
|
|
|
|
var notMnt bool
|
|
var err error
|
|
|
|
if extensiveMountPointCheck {
|
|
notMnt, err = mount.IsNotMountPoint(mounter, mountPath)
|
|
} else {
|
|
notMnt, err = mounter.IsLikelyNotMountPoint(mountPath)
|
|
}
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if notMnt {
|
|
glog.Warningf("Warning: %q is not a mountpoint, deleting", mountPath)
|
|
return os.Remove(mountPath)
|
|
}
|
|
|
|
// Unmount the mount path
|
|
glog.V(4).Infof("%q is a mountpoint, unmounting", mountPath)
|
|
if err := mounter.Unmount(mountPath); err != nil {
|
|
return err
|
|
}
|
|
notMnt, mntErr := mounter.IsLikelyNotMountPoint(mountPath)
|
|
if mntErr != nil {
|
|
return err
|
|
}
|
|
if notMnt {
|
|
glog.V(4).Infof("%q is unmounted, deleting the directory", mountPath)
|
|
return os.Remove(mountPath)
|
|
}
|
|
return fmt.Errorf("Failed to unmount path %v", mountPath)
|
|
}
|
|
|
|
// PathExists returns true if the specified path exists.
|
|
func PathExists(path string) (bool, error) {
|
|
_, err := os.Stat(path)
|
|
if err == nil {
|
|
return true, nil
|
|
} else if os.IsNotExist(err) {
|
|
return false, nil
|
|
} else {
|
|
return false, err
|
|
}
|
|
}
|
|
|
|
// GetSecretForPod locates secret by name in the pod's namespace and returns secret map
|
|
func GetSecretForPod(pod *v1.Pod, secretName string, kubeClient clientset.Interface) (map[string]string, error) {
|
|
secret := make(map[string]string)
|
|
if kubeClient == nil {
|
|
return secret, fmt.Errorf("Cannot get kube client")
|
|
}
|
|
secrets, err := kubeClient.Core().Secrets(pod.Namespace).Get(secretName, metav1.GetOptions{})
|
|
if err != nil {
|
|
return secret, err
|
|
}
|
|
for name, data := range secrets.Data {
|
|
secret[name] = string(data)
|
|
}
|
|
return secret, nil
|
|
}
|
|
|
|
// GetSecretForPV locates secret by name and namespace, verifies the secret type, and returns secret map
|
|
func GetSecretForPV(secretNamespace, secretName, volumePluginName string, kubeClient clientset.Interface) (map[string]string, error) {
|
|
secret := make(map[string]string)
|
|
if kubeClient == nil {
|
|
return secret, fmt.Errorf("Cannot get kube client")
|
|
}
|
|
secrets, err := kubeClient.Core().Secrets(secretNamespace).Get(secretName, metav1.GetOptions{})
|
|
if err != nil {
|
|
return secret, err
|
|
}
|
|
if secrets.Type != v1.SecretType(volumePluginName) {
|
|
return secret, fmt.Errorf("Cannot get secret of type %s", volumePluginName)
|
|
}
|
|
for name, data := range secrets.Data {
|
|
secret[name] = string(data)
|
|
}
|
|
return secret, nil
|
|
}
|
|
|
|
func GetClassForVolume(kubeClient clientset.Interface, pv *v1.PersistentVolume) (*storage.StorageClass, error) {
|
|
if kubeClient == nil {
|
|
return nil, fmt.Errorf("Cannot get kube client")
|
|
}
|
|
className := v1helper.GetPersistentVolumeClass(pv)
|
|
if className == "" {
|
|
return nil, fmt.Errorf("Volume has no storage class")
|
|
}
|
|
|
|
class, err := kubeClient.StorageV1().StorageClasses().Get(className, metav1.GetOptions{})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return class, nil
|
|
}
|
|
|
|
// CheckNodeAffinity looks at the PV node affinity, and checks if the node has the same corresponding labels
|
|
// This ensures that we don't mount a volume that doesn't belong to this node
|
|
func CheckNodeAffinity(pv *v1.PersistentVolume, nodeLabels map[string]string) error {
|
|
affinity, err := v1helper.GetStorageNodeAffinityFromAnnotation(pv.Annotations)
|
|
if err != nil {
|
|
return fmt.Errorf("Error getting storage node affinity: %v", err)
|
|
}
|
|
if affinity == nil {
|
|
return nil
|
|
}
|
|
|
|
if affinity.RequiredDuringSchedulingIgnoredDuringExecution != nil {
|
|
terms := affinity.RequiredDuringSchedulingIgnoredDuringExecution.NodeSelectorTerms
|
|
glog.V(10).Infof("Match for RequiredDuringSchedulingIgnoredDuringExecution node selector terms %+v", terms)
|
|
for _, term := range terms {
|
|
selector, err := v1helper.NodeSelectorRequirementsAsSelector(term.MatchExpressions)
|
|
if err != nil {
|
|
return fmt.Errorf("Failed to parse MatchExpressions: %v", err)
|
|
}
|
|
if !selector.Matches(labels.Set(nodeLabels)) {
|
|
return fmt.Errorf("NodeSelectorTerm %+v does not match node labels", term.MatchExpressions)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// LoadPodFromFile will read, decode, and return a Pod from a file.
|
|
func LoadPodFromFile(filePath string) (*v1.Pod, error) {
|
|
if filePath == "" {
|
|
return nil, fmt.Errorf("file path not specified")
|
|
}
|
|
podDef, err := ioutil.ReadFile(filePath)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to read file path %s: %+v", filePath, err)
|
|
}
|
|
if len(podDef) == 0 {
|
|
return nil, fmt.Errorf("file was empty: %s", filePath)
|
|
}
|
|
pod := &v1.Pod{}
|
|
|
|
codec := api.Codecs.LegacyCodec(api.Registry.GroupOrDie(v1.GroupName).GroupVersion)
|
|
if err := runtime.DecodeInto(codec, podDef, pod); err != nil {
|
|
return nil, fmt.Errorf("failed decoding file: %v", err)
|
|
}
|
|
return pod, nil
|
|
}
|
|
|
|
func ZonesSetToLabelValue(strSet sets.String) string {
|
|
return strings.Join(strSet.UnsortedList(), kubeletapis.LabelMultiZoneDelimiter)
|
|
}
|
|
|
|
// ZonesToSet converts a string containing a comma separated list of zones to set
|
|
func ZonesToSet(zonesString string) (sets.String, error) {
|
|
return stringToSet(zonesString, ",")
|
|
}
|
|
|
|
// LabelZonesToSet converts a PV label value from string containing a delimited list of zones to set
|
|
func LabelZonesToSet(labelZonesValue string) (sets.String, error) {
|
|
return stringToSet(labelZonesValue, kubeletapis.LabelMultiZoneDelimiter)
|
|
}
|
|
|
|
// StringToSet converts a string containing list separated by specified delimiter to to a set
|
|
func stringToSet(str, delimiter string) (sets.String, error) {
|
|
zonesSlice := strings.Split(str, delimiter)
|
|
zonesSet := make(sets.String)
|
|
for _, zone := range zonesSlice {
|
|
trimmedZone := strings.TrimSpace(zone)
|
|
if trimmedZone == "" {
|
|
return make(sets.String), fmt.Errorf(
|
|
"%q separated list (%q) must not contain an empty string",
|
|
delimiter,
|
|
str)
|
|
}
|
|
zonesSet.Insert(trimmedZone)
|
|
}
|
|
return zonesSet, nil
|
|
}
|