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azure_managedDiskController.go
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/
azure_managedDiskController.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
import (
"path"
"strings"
"github.com/Azure/azure-sdk-for-go/arm/disk"
storage "github.com/Azure/azure-sdk-for-go/arm/storage"
"github.com/golang/glog"
kwait "k8s.io/apimachinery/pkg/util/wait"
)
//ManagedDiskController : managed disk controller struct
type ManagedDiskController struct {
common *controllerCommon
}
func newManagedDiskController(common *controllerCommon) (*ManagedDiskController, error) {
return &ManagedDiskController{common: common}, nil
}
//CreateManagedDisk : create managed disk
func (c *ManagedDiskController) CreateManagedDisk(diskName string, storageAccountType storage.SkuName, sizeGB int, tags map[string]string) (string, error) {
glog.V(4).Infof("azureDisk - creating new managed Name:%s StorageAccountType:%s Size:%v", diskName, storageAccountType, sizeGB)
newTags := make(map[string]*string)
azureDDTag := "kubernetes-azure-dd"
newTags["created-by"] = &azureDDTag
// insert original tags to newTags
if tags != nil {
for k, v := range tags {
// Azure won't allow / (forward slash) in tags
newKey := strings.Replace(k, "/", "-", -1)
newValue := strings.Replace(v, "/", "-", -1)
newTags[newKey] = &newValue
}
}
diskSizeGB := int32(sizeGB)
model := disk.Model{
Location: &c.common.location,
Tags: &newTags,
Properties: &disk.Properties{
AccountType: disk.StorageAccountTypes(storageAccountType),
DiskSizeGB: &diskSizeGB,
CreationData: &disk.CreationData{CreateOption: disk.Empty},
}}
cancel := make(chan struct{})
respChan, errChan := c.common.cloud.DisksClient.CreateOrUpdate(c.common.resourceGroup, diskName, model, cancel)
<-respChan
err := <-errChan
if err != nil {
return "", err
}
diskID := ""
err = kwait.ExponentialBackoff(defaultBackOff, func() (bool, error) {
provisonState, id, err := c.getDisk(diskName)
diskID = id
// We are waiting for provisioningState==Succeeded
// We don't want to hand-off managed disks to k8s while they are
//still being provisioned, this is to avoid some race conditions
if err != nil {
return false, err
}
if strings.ToLower(provisonState) == "succeeded" {
return true, nil
}
return false, nil
})
if err != nil {
glog.V(2).Infof("azureDisk - created new MD Name:%s StorageAccountType:%s Size:%v but was unable to confirm provisioningState in poll process", diskName, storageAccountType, sizeGB)
} else {
glog.V(2).Infof("azureDisk - created new MD Name:%s StorageAccountType:%s Size:%v", diskName, storageAccountType, sizeGB)
}
return diskID, nil
}
//DeleteManagedDisk : delete managed disk
func (c *ManagedDiskController) DeleteManagedDisk(diskURI string) error {
diskName := path.Base(diskURI)
cancel := make(chan struct{})
respChan, errChan := c.common.cloud.DisksClient.Delete(c.common.resourceGroup, diskName, cancel)
<-respChan
err := <-errChan
if err != nil {
return err
}
// We don't need poll here, k8s will immediatly stop referencing the disk
// the disk will be evantually deleted - cleanly - by ARM
glog.V(2).Infof("azureDisk - deleted a managed disk: %s", diskURI)
return nil
}
// return: disk provisionState, diskID, error
func (c *ManagedDiskController) getDisk(diskName string) (string, string, error) {
result, err := c.common.cloud.DisksClient.Get(c.common.resourceGroup, diskName)
if err != nil {
return "", "", err
}
if result.Properties != nil && (*result.Properties).ProvisioningState != nil {
return *(*result.Properties).ProvisioningState, *result.ID, nil
}
return "", "", err
}