/
azure.go
596 lines (529 loc) · 16.9 KB
/
azure.go
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package azure
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"time"
"github.com/Azure/azure-sdk-for-go/services/compute/mgmt/2019-03-01/compute"
"github.com/Azure/go-autorest/autorest"
azure_rest "github.com/Azure/go-autorest/autorest/azure"
"github.com/Azure/go-autorest/autorest/azure/auth"
"github.com/Azure/go-autorest/autorest/to"
snapv1 "github.com/kubernetes-incubator/external-storage/snapshot/pkg/apis/crd/v1"
snapshotVolume "github.com/kubernetes-incubator/external-storage/snapshot/pkg/volume"
storkvolume "github.com/libopenstorage/stork/drivers/volume"
storkapi "github.com/libopenstorage/stork/pkg/apis/stork/v1alpha1"
"github.com/libopenstorage/stork/pkg/errors"
"github.com/libopenstorage/stork/pkg/log"
"github.com/portworx/sched-ops/k8s/core"
"github.com/portworx/sched-ops/k8s/storage"
"github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/uuid"
k8shelper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
)
const (
// driverName is the name of the azure driver implementation
driverName = "azure"
// provisioner names for azure disks
provisionerName = "kubernetes.io/azure-disk"
// CSI provisioner names for azure disks
csiProvisionerName = "disk.csi.azure.com"
// pvcProvisionerAnnotation is the annotation on PVC which has the
// provisioner name
pvcProvisionerAnnotation = "volume.beta.kubernetes.io/storage-provisioner"
// pvProvisionedByAnnotation is the annotation on PV which has the
// provisioner name
pvProvisionedByAnnotation = "pv.kubernetes.io/provisioned-by"
pvNamePrefix = "pvc-"
subscriptionIDKey = "subscriptionId"
resourceGroupKey = "resourceGroupName"
metadataURL = "http://169.254.169.254/metadata/instance/compute"
apiVersion = "2018-02-01"
)
type azure struct {
initDone bool
resourceGroup string
diskClient compute.DisksClient
snapshotClient compute.SnapshotsClient
storkvolume.ClusterPairNotSupported
storkvolume.MigrationNotSupported
storkvolume.GroupSnapshotNotSupported
storkvolume.ClusterDomainsNotSupported
storkvolume.CloneNotSupported
storkvolume.SnapshotRestoreNotSupported
}
func (a *azure) Init(_ interface{}) error {
authorizer, err := auth.NewAuthorizerFromEnvironment()
if err != nil {
return err
}
metadata, err := a.getMetadata()
if err != nil {
return err
}
var ok bool
var subscriptionID string
if subscriptionID, ok = metadata[subscriptionIDKey]; !ok {
return fmt.Errorf("error detecting subscription ID from cluster context")
}
a.diskClient = compute.NewDisksClient(subscriptionID)
a.snapshotClient = compute.NewSnapshotsClient(subscriptionID)
a.diskClient.Authorizer = authorizer
a.snapshotClient.Authorizer = authorizer
if a.resourceGroup, ok = metadata[resourceGroupKey]; !ok {
return fmt.Errorf("error detecting subscription ID from cluster context")
}
a.initDone = true
return nil
}
func (a *azure) getMetadata() (map[string]string, error) {
client := http.Client{Timeout: time.Second * 3}
req, err := http.NewRequest("GET", metadataURL, nil)
if err != nil {
return nil, fmt.Errorf("error querying Azure metadata: %v", err)
}
req.Header.Add("Metadata", "True")
q := req.URL.Query()
q.Add("format", "json")
q.Add("api-version", apiVersion)
req.URL.RawQuery = q.Encode()
resp, err := client.Do(req)
if err != nil {
return nil, fmt.Errorf("error querying Azure metadata: %v", err)
}
defer func() {
err := resp.Body.Close()
if err != nil {
logrus.Errorf("Error closing body when getching azure metadate: %v", err)
}
}()
if resp.StatusCode != 200 {
return nil, fmt.Errorf("error querying Azure metadata: Code %d returned for url %s", resp.StatusCode, req.URL)
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("error querying Azure metadata: %v", err)
}
if len(body) == 0 {
return nil, fmt.Errorf("error querying Azure metadata: Empty response")
}
metadata := make(map[string]string)
err = json.Unmarshal(body, &metadata)
if err != nil {
return nil, fmt.Errorf("error parsing Azure metadata: %v", err)
}
return metadata, nil
}
func (a *azure) String() string {
return driverName
}
func (a *azure) Stop() error {
return nil
}
func (a *azure) OwnsPVC(coreOps core.Ops, pvc *v1.PersistentVolumeClaim) bool {
provisioner := ""
// Check for the provisioner in the PVC annotation. If not populated
// try getting the provisioner from the Storage class.
if val, ok := pvc.Annotations[pvcProvisionerAnnotation]; ok {
provisioner = val
} else {
storageClassName := k8shelper.GetPersistentVolumeClaimClass(pvc)
if storageClassName != "" {
storageClass, err := storage.Instance().GetStorageClass(storageClassName)
if err == nil {
provisioner = storageClass.Provisioner
} else {
logrus.Warnf("Error getting storageclass %v for pvc %v: %v", storageClassName, pvc.Name, err)
}
}
}
if provisioner == "" {
// Try to get info from the PV since storage class could be deleted
pv, err := coreOps.GetPersistentVolume(pvc.Spec.VolumeName)
if err != nil {
logrus.Warnf("Error getting pv %v for pvc %v: %v", pvc.Spec.VolumeName, pvc.Name, err)
return false
}
return a.OwnsPV(pv)
}
if provisioner != provisionerName &&
!isCsiProvisioner(provisioner) {
logrus.Tracef("Provisioner in Storageclass not Azure: %v", provisioner)
return false
}
return true
}
func (a *azure) OwnsPV(pv *v1.PersistentVolume) bool {
var provisioner string
// Check the annotation in the PV for the provisioner
if val, ok := pv.Annotations[pvProvisionedByAnnotation]; ok {
provisioner = val
} else {
// Finally check the volume reference in the spec
if pv.Spec.AzureDisk != nil {
return true
}
}
if provisioner != provisionerName &&
!isCsiProvisioner(provisioner) {
logrus.Tracef("Provisioner in Storageclass not AzureDisk: %v", provisioner)
return false
}
return true
}
func isCsiProvisioner(provisioner string) bool {
return csiProvisionerName == provisioner
}
func (a *azure) findExistingSnapshot(tags map[string]string) (*compute.Snapshot, error) {
snapshotList, err := a.snapshotClient.List(context.TODO())
if err != nil {
return nil, err
}
for {
for _, snap := range snapshotList.Values() {
match := true
// If any of the tags aren't found or match, skip the snapshot
for k, v := range tags {
if value, present := snap.Tags[k]; !present || *value != v {
match = false
break
}
}
if match {
return &snap, nil
}
}
// Move to the next page if there are more snapshots
if snapshotList.NotDone() {
if err := snapshotList.Next(); err != nil {
return nil, err
}
} else {
break
}
}
return nil, nil
}
func (a *azure) StartBackup(
backup *storkapi.ApplicationBackup,
pvcs []v1.PersistentVolumeClaim,
) ([]*storkapi.ApplicationBackupVolumeInfo, error) {
if !a.initDone {
if err := a.Init(nil); err != nil {
return nil, err
}
}
volumeInfos := make([]*storkapi.ApplicationBackupVolumeInfo, 0)
for _, pvc := range pvcs {
if pvc.DeletionTimestamp != nil {
log.ApplicationBackupLog(backup).Warnf("Ignoring PVC %v which is being deleted", pvc.Name)
continue
}
volumeInfo := &storkapi.ApplicationBackupVolumeInfo{
PersistentVolumeClaim: pvc.Name,
Namespace: pvc.Namespace,
DriverName: driverName,
Volume: pvc.Spec.VolumeName,
Options: map[string]string{
resourceGroupKey: a.resourceGroup,
},
}
volumeInfos = append(volumeInfos, volumeInfo)
pvName, err := core.Instance().GetVolumeForPersistentVolumeClaim(&pvc)
if err != nil {
return nil, fmt.Errorf("error getting PV name for PVC (%v/%v): %v", pvc.Namespace, pvc.Name, err)
}
pv, err := core.Instance().GetPersistentVolume(pvName)
if err != nil {
return nil, fmt.Errorf("error getting pv %v: %v", pvName, err)
}
tags := storkvolume.GetApplicationBackupLabels(backup, &pvc)
if snapshot, err := a.findExistingSnapshot(tags); err == nil && snapshot != nil {
volumeInfo.BackupID = *snapshot.Name
} else {
var volume string
if pv.Spec.AzureDisk != nil {
volume = pv.Spec.AzureDisk.DiskName
} else if pv.Spec.CSI != nil {
resource, err := azure_rest.ParseResourceID(pv.Spec.CSI.VolumeHandle)
if err != nil {
return nil, err
}
volume = resource.ResourceName
} else {
return nil, fmt.Errorf("azure disk info not found in PV %v", pvName)
}
disk, err := a.diskClient.Get(context.TODO(), a.resourceGroup, volume)
if err != nil {
return nil, err
}
snapshot := compute.Snapshot{
Name: to.StringPtr("stork-snapshot-" + string(uuid.NewUUID())),
SnapshotProperties: &compute.SnapshotProperties{
CreationData: &compute.CreationData{
CreateOption: compute.Copy,
SourceResourceID: disk.ID,
},
},
Tags: make(map[string]*string),
Location: disk.Location,
}
for k, v := range tags {
snapshot.Tags[k] = to.StringPtr(v)
}
_, err = a.snapshotClient.CreateOrUpdate(context.TODO(), a.resourceGroup, *snapshot.Name, snapshot)
if err != nil {
return nil, fmt.Errorf("error triggering backup for volume: %v (PVC: %v, Namespace: %v): %v", volume, pvc.Name, pvc.Namespace, err)
}
volumeInfo.BackupID = *snapshot.Name
}
}
return volumeInfos, nil
}
func (a *azure) GetBackupStatus(backup *storkapi.ApplicationBackup) ([]*storkapi.ApplicationBackupVolumeInfo, error) {
if !a.initDone {
if err := a.Init(nil); err != nil {
return nil, err
}
}
volumeInfos := make([]*storkapi.ApplicationBackupVolumeInfo, 0)
for _, vInfo := range backup.Status.Volumes {
if vInfo.DriverName != driverName {
continue
}
snapshot, err := a.snapshotClient.Get(context.TODO(), a.resourceGroup, vInfo.BackupID)
if err != nil {
return nil, err
}
switch *snapshot.ProvisioningState {
case "Failed":
vInfo.Status = storkapi.ApplicationBackupStatusFailed
vInfo.Reason = fmt.Sprintf("Backup failed for volume: %v", snapshot.ProvisioningState)
case "Succeeded":
vInfo.Status = storkapi.ApplicationBackupStatusSuccessful
vInfo.Reason = "Backup successful for volume"
vInfo.TotalSize = uint64(*snapshot.DiskSizeBytes)
vInfo.ActualSize = uint64(*snapshot.DiskSizeBytes)
default:
vInfo.Status = storkapi.ApplicationBackupStatusInProgress
vInfo.Reason = fmt.Sprintf("Volume backup in progress: %v", snapshot.ProvisioningState)
}
volumeInfos = append(volumeInfos, vInfo)
}
return volumeInfos, nil
}
func (a *azure) CancelBackup(backup *storkapi.ApplicationBackup) error {
return a.DeleteBackup(backup)
}
func (a *azure) DeleteBackup(backup *storkapi.ApplicationBackup) error {
if !a.initDone {
if err := a.Init(nil); err != nil {
return err
}
}
for _, vInfo := range backup.Status.Volumes {
if vInfo.DriverName != driverName {
continue
}
_, err := a.snapshotClient.Delete(context.TODO(), a.resourceGroup, vInfo.BackupID)
if err != nil {
// Ignore if the snaphot has already been deleted
if azureErr, ok := err.(autorest.DetailedError); ok {
if azureErr.StatusCode == http.StatusNotFound {
continue
}
}
}
}
return nil
}
func (a *azure) UpdateMigratedPersistentVolumeSpec(
pv *v1.PersistentVolume,
) (*v1.PersistentVolume, error) {
disk, err := a.diskClient.Get(context.TODO(), a.resourceGroup, pv.Name)
if err != nil {
return nil, err
}
if pv.Spec.CSI != nil {
pv.Spec.CSI.VolumeHandle = *disk.ID
return pv, nil
}
pv.Spec.AzureDisk.DiskName = pv.Name
pv.Spec.AzureDisk.DataDiskURI = *disk.ID
return pv, nil
}
func (a *azure) generatePVName() string {
return pvNamePrefix + string(uuid.NewUUID())
}
func (a *azure) findExistingDisk(tags map[string]string) (*compute.Disk, error) {
diskList, err := a.diskClient.List(context.TODO())
if err != nil {
return nil, err
}
for {
for _, disk := range diskList.Values() {
match := true
// If any of the tags aren't found or match, skip the disk
for k, v := range tags {
if value, present := disk.Tags[k]; !present || *value != v {
match = false
break
}
}
if match {
return &disk, nil
}
}
// Move to the next page if there are more disks
if diskList.NotDone() {
if err := diskList.Next(); err != nil {
return nil, err
}
} else {
break
}
}
return nil, nil
}
func (a *azure) GetPreRestoreResources(
*storkapi.ApplicationBackup,
[]runtime.Unstructured,
) ([]runtime.Unstructured, error) {
return nil, nil
}
func (a *azure) StartRestore(
restore *storkapi.ApplicationRestore,
volumeBackupInfos []*storkapi.ApplicationBackupVolumeInfo,
) ([]*storkapi.ApplicationRestoreVolumeInfo, error) {
if !a.initDone {
if err := a.Init(nil); err != nil {
return nil, err
}
}
volumeInfos := make([]*storkapi.ApplicationRestoreVolumeInfo, 0)
for _, backupVolumeInfo := range volumeBackupInfos {
var resourceGroup string
if val, present := backupVolumeInfo.Options[resourceGroupKey]; present {
resourceGroup = val
} else {
resourceGroup = a.resourceGroup
logrus.Warnf("missing resource group in snapshot %v, will use current resource group", backupVolumeInfo.BackupID)
}
snapshot, err := a.snapshotClient.Get(context.TODO(), resourceGroup, backupVolumeInfo.BackupID)
if err != nil {
return nil, err
}
volumeInfo := &storkapi.ApplicationRestoreVolumeInfo{
PersistentVolumeClaim: backupVolumeInfo.PersistentVolumeClaim,
SourceNamespace: backupVolumeInfo.Namespace,
SourceVolume: backupVolumeInfo.Volume,
DriverName: driverName,
}
volumeInfos = append(volumeInfos, volumeInfo)
tags := storkvolume.GetApplicationRestoreLabels(restore, volumeInfo)
if disk, err := a.findExistingDisk(tags); err == nil && disk != nil {
volumeInfo.RestoreVolume = *disk.Name
} else {
disk := compute.Disk{
Name: to.StringPtr(a.generatePVName()),
DiskProperties: &compute.DiskProperties{
CreationData: &compute.CreationData{
CreateOption: compute.Copy,
SourceResourceID: snapshot.ID,
},
},
Tags: make(map[string]*string),
Location: snapshot.Location,
}
for k, v := range tags {
disk.Tags[k] = to.StringPtr(v)
}
_, err = a.diskClient.CreateOrUpdate(context.TODO(), a.resourceGroup, *disk.Name, disk)
if err != nil {
return nil, fmt.Errorf("error triggering restore for volume: %v: %v",
backupVolumeInfo.Volume, err)
}
volumeInfo.RestoreVolume = *disk.Name
}
}
return volumeInfos, nil
}
func (a *azure) CancelRestore(*storkapi.ApplicationRestore) error {
// Do nothing to cancel restores for now
return nil
}
func (a *azure) GetRestoreStatus(restore *storkapi.ApplicationRestore) ([]*storkapi.ApplicationRestoreVolumeInfo, error) {
if !a.initDone {
if err := a.Init(nil); err != nil {
return nil, err
}
}
volumeInfos := make([]*storkapi.ApplicationRestoreVolumeInfo, 0)
for _, vInfo := range restore.Status.Volumes {
disk, err := a.diskClient.Get(context.TODO(), a.resourceGroup, vInfo.RestoreVolume)
if err != nil {
if azureErr, ok := err.(autorest.DetailedError); ok {
if azureErr.StatusCode == http.StatusNotFound {
vInfo.Status = storkapi.ApplicationRestoreStatusFailed
vInfo.Reason = "Restore failed for volume: NotFound"
volumeInfos = append(volumeInfos, vInfo)
continue
}
}
return nil, err
}
switch *disk.ProvisioningState {
case "Failed":
vInfo.Status = storkapi.ApplicationRestoreStatusFailed
vInfo.Reason = fmt.Sprintf("Restore failed for volume: %v", disk.ProvisioningState)
case "Succeeded":
vInfo.Status = storkapi.ApplicationRestoreStatusSuccessful
vInfo.Reason = "Restore successful for volume"
vInfo.TotalSize = uint64(*disk.DiskSizeBytes)
default:
vInfo.Status = storkapi.ApplicationRestoreStatusInProgress
vInfo.Reason = fmt.Sprintf("Volume restore in progress: %v", disk.ProvisioningState)
}
volumeInfos = append(volumeInfos, vInfo)
}
return volumeInfos, nil
}
func (a *azure) InspectVolume(volumeID string) (*storkvolume.Info, error) {
return nil, &errors.ErrNotSupported{}
}
func (a *azure) GetClusterID() (string, error) {
return "", &errors.ErrNotSupported{}
}
func (a *azure) GetNodes() ([]*storkvolume.NodeInfo, error) {
return nil, &errors.ErrNotSupported{}
}
func (a *azure) InspectNode(id string) (*storkvolume.NodeInfo, error) {
return nil, &errors.ErrNotSupported{}
}
func (a *azure) GetPodVolumes(podSpec *v1.PodSpec, namespace string) ([]*storkvolume.Info, error) {
return nil, &errors.ErrNotSupported{}
}
func (a *azure) GetSnapshotPlugin() snapshotVolume.Plugin {
return nil
}
func (a *azure) GetSnapshotType(snap *snapv1.VolumeSnapshot) (string, error) {
return "", &errors.ErrNotSupported{}
}
func (a *azure) GetVolumeClaimTemplates([]v1.PersistentVolumeClaim) (
[]v1.PersistentVolumeClaim, error) {
return nil, &errors.ErrNotSupported{}
}
func init() {
a := &azure{}
err := a.Init(nil)
if err != nil {
logrus.Debugf("Error init'ing azure driver: %v", err)
}
if err := storkvolume.Register(driverName, a); err != nil {
logrus.Panicf("Error registering azure volume driver: %v", err)
}
}