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resource_azure_data_disk.go
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resource_azure_data_disk.go
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package azure
import (
"fmt"
"log"
"time"
"github.com/Azure/azure-sdk-for-go/management"
"github.com/Azure/azure-sdk-for-go/management/virtualmachinedisk"
"github.com/hashicorp/terraform/helper/schema"
)
const dataDiskBlobStorageURL = "http://%s.blob.core.windows.net/disks/%s.vhd"
func resourceAzureDataDisk() *schema.Resource {
return &schema.Resource{
Create: resourceAzureDataDiskCreate,
Read: resourceAzureDataDiskRead,
Update: resourceAzureDataDiskUpdate,
Delete: resourceAzureDataDiskDelete,
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"label": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"lun": &schema.Schema{
Type: schema.TypeInt,
Required: true,
},
"size": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
},
"caching": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Default: "None",
},
"storage_service_name": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: true,
},
"media_link": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"source_media_link": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: true,
},
"virtual_machine": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
},
}
}
func resourceAzureDataDiskCreate(d *schema.ResourceData, meta interface{}) error {
mc := meta.(*Client).mgmtClient
vmDiskClient := meta.(*Client).vmDiskClient
if err := verifyDataDiskParameters(d); err != nil {
return err
}
lun := d.Get("lun").(int)
vm := d.Get("virtual_machine").(string)
label := d.Get("label").(string)
if label == "" {
label = fmt.Sprintf("%s-%d", vm, lun)
}
p := virtualmachinedisk.CreateDataDiskParameters{
DiskLabel: label,
Lun: lun,
LogicalDiskSizeInGB: d.Get("size").(int),
HostCaching: hostCaching(d),
MediaLink: mediaLink(d),
SourceMediaLink: d.Get("source_media_link").(string),
}
if name, ok := d.GetOk("name"); ok {
p.DiskName = name.(string)
}
log.Printf("[DEBUG] Adding data disk %d to instance: %s", lun, vm)
req, err := vmDiskClient.AddDataDisk(vm, vm, vm, p)
if err != nil {
return fmt.Errorf("Error adding data disk %d to instance %s: %s", lun, vm, err)
}
// Wait until the data disk is added
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf(
"Error waiting for data disk %d to be added to instance %s: %s", lun, vm, err)
}
log.Printf("[DEBUG] Retrieving data disk %d from instance %s", lun, vm)
disk, err := vmDiskClient.GetDataDisk(vm, vm, vm, lun)
if err != nil {
return fmt.Errorf("Error retrieving data disk %d from instance %s: %s", lun, vm, err)
}
d.SetId(disk.DiskName)
return resourceAzureDataDiskRead(d, meta)
}
func resourceAzureDataDiskRead(d *schema.ResourceData, meta interface{}) error {
vmDiskClient := meta.(*Client).vmDiskClient
lun := d.Get("lun").(int)
vm := d.Get("virtual_machine").(string)
log.Printf("[DEBUG] Retrieving data disk: %s", d.Id())
datadisk, err := vmDiskClient.GetDataDisk(vm, vm, vm, lun)
if err != nil {
if management.IsResourceNotFoundError(err) {
d.SetId("")
return nil
}
return fmt.Errorf("Error retrieving data disk %s: %s", d.Id(), err)
}
d.Set("name", datadisk.DiskName)
d.Set("label", datadisk.DiskLabel)
d.Set("lun", datadisk.Lun)
d.Set("size", datadisk.LogicalDiskSizeInGB)
d.Set("caching", datadisk.HostCaching)
d.Set("media_link", datadisk.MediaLink)
log.Printf("[DEBUG] Retrieving disk: %s", d.Id())
disk, err := vmDiskClient.GetDisk(d.Id())
if err != nil {
return fmt.Errorf("Error retrieving disk %s: %s", d.Id(), err)
}
d.Set("virtual_machine", disk.AttachedTo.RoleName)
return nil
}
func resourceAzureDataDiskUpdate(d *schema.ResourceData, meta interface{}) error {
mc := meta.(*Client).mgmtClient
vmDiskClient := meta.(*Client).vmDiskClient
lun := d.Get("lun").(int)
vm := d.Get("virtual_machine").(string)
if d.HasChange("lun") || d.HasChange("size") || d.HasChange("virtual_machine") {
olun, _ := d.GetChange("lun")
ovm, _ := d.GetChange("virtual_machine")
log.Printf("[DEBUG] Detaching data disk: %s", d.Id())
req, err := vmDiskClient.
DeleteDataDisk(ovm.(string), ovm.(string), ovm.(string), olun.(int), false)
if err != nil {
return fmt.Errorf("Error detaching data disk %s: %s", d.Id(), err)
}
// Wait until the data disk is detached
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf(
"Error waiting for data disk %s to be detached: %s", d.Id(), err)
}
log.Printf("[DEBUG] Verifying data disk %s is properly detached...", d.Id())
for i := 0; i < 6; i++ {
disk, err := vmDiskClient.GetDisk(d.Id())
if err != nil {
return fmt.Errorf("Error retrieving disk %s: %s", d.Id(), err)
}
// Check if the disk is really detached
if disk.AttachedTo.RoleName == "" {
break
}
// If not, wait 30 seconds and try it again...
time.Sleep(time.Duration(30 * time.Second))
}
if d.HasChange("size") {
p := virtualmachinedisk.UpdateDiskParameters{
Name: d.Id(),
Label: d.Get("label").(string),
ResizedSizeInGB: d.Get("size").(int),
}
log.Printf("[DEBUG] Updating disk: %s", d.Id())
req, err := vmDiskClient.UpdateDisk(d.Id(), p)
if err != nil {
return fmt.Errorf("Error updating disk %s: %s", d.Id(), err)
}
// Wait until the disk is updated
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf(
"Error waiting for disk %s to be updated: %s", d.Id(), err)
}
}
p := virtualmachinedisk.CreateDataDiskParameters{
DiskName: d.Id(),
Lun: lun,
HostCaching: hostCaching(d),
MediaLink: mediaLink(d),
}
log.Printf("[DEBUG] Attaching data disk: %s", d.Id())
req, err = vmDiskClient.AddDataDisk(vm, vm, vm, p)
if err != nil {
return fmt.Errorf("Error attaching data disk %s to instance %s: %s", d.Id(), vm, err)
}
// Wait until the data disk is attached
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf(
"Error waiting for data disk %s to be attached to instance %s: %s", d.Id(), vm, err)
}
// Make sure we return here since all possible changes are
// already updated if we reach this point
return nil
}
if d.HasChange("caching") {
p := virtualmachinedisk.UpdateDataDiskParameters{
DiskName: d.Id(),
Lun: lun,
HostCaching: hostCaching(d),
MediaLink: mediaLink(d),
}
log.Printf("[DEBUG] Updating data disk: %s", d.Id())
req, err := vmDiskClient.UpdateDataDisk(vm, vm, vm, lun, p)
if err != nil {
return fmt.Errorf("Error updating data disk %s: %s", d.Id(), err)
}
// Wait until the data disk is updated
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf(
"Error waiting for data disk %s to be updated: %s", d.Id(), err)
}
}
return resourceAzureDataDiskRead(d, meta)
}
func resourceAzureDataDiskDelete(d *schema.ResourceData, meta interface{}) error {
mc := meta.(*Client).mgmtClient
vmDiskClient := meta.(*Client).vmDiskClient
lun := d.Get("lun").(int)
vm := d.Get("virtual_machine").(string)
// If a name was not supplied, it means we created a new emtpy disk and we now want to
// delete that disk again. Otherwise we only want to detach the disk and keep the blob.
_, removeBlob := d.GetOk("name")
log.Printf("[DEBUG] Detaching data disk %s with removeBlob = %t", d.Id(), removeBlob)
req, err := vmDiskClient.DeleteDataDisk(vm, vm, vm, lun, removeBlob)
if err != nil {
return fmt.Errorf(
"Error detaching data disk %s with removeBlob = %t: %s", d.Id(), removeBlob, err)
}
// Wait until the data disk is detached and optionally deleted
if err := mc.WaitForOperation(req, nil); err != nil {
return fmt.Errorf(
"Error waiting for data disk %s to be detached with removeBlob = %t: %s",
d.Id(), removeBlob, err)
}
d.SetId("")
return nil
}
func hostCaching(d *schema.ResourceData) virtualmachinedisk.HostCachingType {
switch d.Get("caching").(string) {
case "ReadOnly":
return virtualmachinedisk.HostCachingTypeReadOnly
case "ReadWrite":
return virtualmachinedisk.HostCachingTypeReadWrite
default:
return virtualmachinedisk.HostCachingTypeNone
}
}
func mediaLink(d *schema.ResourceData) string {
mediaLink, ok := d.GetOk("media_link")
if ok {
return mediaLink.(string)
}
name, ok := d.GetOk("name")
if !ok {
name = fmt.Sprintf("%s-%d", d.Get("virtual_machine").(string), d.Get("lun").(int))
}
return fmt.Sprintf(dataDiskBlobStorageURL, d.Get("storage_service_name").(string), name.(string))
}
func verifyDataDiskParameters(d *schema.ResourceData) error {
caching := d.Get("caching").(string)
if caching != "None" && caching != "ReadOnly" && caching != "ReadWrite" {
return fmt.Errorf(
"Invalid caching type %s! Valid options are 'None', 'ReadOnly' and 'ReadWrite'.", caching)
}
if _, ok := d.GetOk("media_link"); !ok {
if _, ok := d.GetOk("storage_service_name"); !ok {
return fmt.Errorf("If not supplying 'media_link', you must supply 'storage'.")
}
}
return nil
}