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azure_provision.go
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azure_provision.go
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/*
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 azure_dd
import (
"fmt"
"strings"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/kubernetes/pkg/volume"
)
type azureDiskProvisioner struct {
plugin *azureDataDiskPlugin
options volume.VolumeOptions
}
type azureDiskDeleter struct {
*dataDisk
spec *volume.Spec
plugin *azureDataDiskPlugin
}
var _ volume.Provisioner = &azureDiskProvisioner{}
var _ volume.Deleter = &azureDiskDeleter{}
func (d *azureDiskDeleter) GetPath() string {
return getPath(d.podUID, d.dataDisk.diskName, d.plugin.host)
}
func (d *azureDiskDeleter) Delete() error {
volumeSource, err := getVolumeSource(d.spec)
if err != nil {
return err
}
diskController, err := getDiskController(d.plugin.host)
if err != nil {
return err
}
managed := (*volumeSource.Kind == v1.AzureManagedDisk)
if managed {
return diskController.DeleteManagedDisk(volumeSource.DataDiskURI)
}
return diskController.DeleteBlobDisk(volumeSource.DataDiskURI)
}
func (p *azureDiskProvisioner) Provision() (*v1.PersistentVolume, error) {
if !volume.AccessModesContainedInAll(p.plugin.GetAccessModes(), p.options.PVC.Spec.AccessModes) {
return nil, fmt.Errorf("invalid AccessModes %v: only AccessModes %v are supported", p.options.PVC.Spec.AccessModes, p.plugin.GetAccessModes())
}
supportedModes := p.plugin.GetAccessModes()
// perform static validation first
if p.options.PVC.Spec.Selector != nil {
return nil, fmt.Errorf("azureDisk - claim.Spec.Selector is not supported for dynamic provisioning on Azure disk")
}
if len(p.options.PVC.Spec.AccessModes) > 1 {
return nil, fmt.Errorf("AzureDisk - multiple access modes are not supported on AzureDisk plugin")
}
if len(p.options.PVC.Spec.AccessModes) == 1 {
if p.options.PVC.Spec.AccessModes[0] != supportedModes[0] {
return nil, fmt.Errorf("AzureDisk - mode %s is not supporetd by AzureDisk plugin supported mode is %s", p.options.PVC.Spec.AccessModes[0], supportedModes)
}
}
var (
location, account string
storageAccountType, fsType string
cachingMode v1.AzureDataDiskCachingMode
strKind string
err error
)
// maxLength = 79 - (4 for ".vhd") = 75
name := volume.GenerateVolumeName(p.options.ClusterName, p.options.PVName, 75)
capacity := p.options.PVC.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
requestBytes := capacity.Value()
requestGB := int(volume.RoundUpSize(requestBytes, 1024*1024*1024))
for k, v := range p.options.Parameters {
switch strings.ToLower(k) {
case "skuname":
storageAccountType = v
case "location":
location = v
case "storageaccount":
account = v
case "storageaccounttype":
storageAccountType = v
case "kind":
strKind = v
case "cachingmode":
cachingMode = v1.AzureDataDiskCachingMode(v)
case volume.VolumeParameterFSType:
fsType = strings.ToLower(v)
default:
return nil, fmt.Errorf("AzureDisk - invalid option %s in storage class", k)
}
}
// normalize values
fsType = normalizeFsType(fsType)
skuName, err := normalizeStorageAccountType(storageAccountType)
if err != nil {
return nil, err
}
kind, err := normalizeKind(strFirstLetterToUpper(strKind))
if err != nil {
return nil, err
}
if cachingMode, err = normalizeCachingMode(cachingMode); err != nil {
return nil, err
}
diskController, err := getDiskController(p.plugin.host)
if err != nil {
return nil, err
}
// create disk
diskURI := ""
if kind == v1.AzureManagedDisk {
diskURI, err = diskController.CreateManagedDisk(name, skuName, requestGB, *(p.options.CloudTags))
if err != nil {
return nil, err
}
} else {
if kind == v1.AzureDedicatedBlobDisk {
_, diskURI, _, err = diskController.CreateVolume(name, account, storageAccountType, location, requestGB)
if err != nil {
return nil, err
}
} else {
diskURI, err = diskController.CreateBlobDisk(name, skuName, requestGB)
if err != nil {
return nil, err
}
}
}
pv := &v1.PersistentVolume{
ObjectMeta: metav1.ObjectMeta{
Name: p.options.PVName,
Labels: map[string]string{},
Annotations: map[string]string{
"volumehelper.VolumeDynamicallyCreatedByKey": "azure-disk-dynamic-provisioner",
},
},
Spec: v1.PersistentVolumeSpec{
PersistentVolumeReclaimPolicy: p.options.PersistentVolumeReclaimPolicy,
AccessModes: supportedModes,
Capacity: v1.ResourceList{
v1.ResourceName(v1.ResourceStorage): resource.MustParse(fmt.Sprintf("%dGi", requestGB)),
},
PersistentVolumeSource: v1.PersistentVolumeSource{
AzureDisk: &v1.AzureDiskVolumeSource{
CachingMode: &cachingMode,
DiskName: name,
DataDiskURI: diskURI,
Kind: &kind,
FSType: &fsType,
},
},
MountOptions: p.options.MountOptions,
},
}
return pv, nil
}