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resource_cloudstack_disk.go
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resource_cloudstack_disk.go
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package cloudstack
import (
"fmt"
"strings"
"github.com/hashicorp/terraform/helper/schema"
"github.com/xanzy/go-cloudstack/cloudstack"
)
func resourceCloudStackDisk() *schema.Resource {
return &schema.Resource{
Create: resourceCloudStackDiskCreate,
Read: resourceCloudStackDiskRead,
Update: resourceCloudStackDiskUpdate,
Delete: resourceCloudStackDiskDelete,
Schema: map[string]*schema.Schema{
"name": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"attach": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
Default: false,
},
"device": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
},
"disk_offering": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"size": &schema.Schema{
Type: schema.TypeInt,
Optional: true,
Computed: true,
},
"shrink_ok": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
Default: false,
},
"virtual_machine": &schema.Schema{
Type: schema.TypeString,
Optional: true,
},
"project": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: true,
},
"zone": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
},
}
}
func resourceCloudStackDiskCreate(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
d.Partial(true)
name := d.Get("name").(string)
// Create a new parameter struct
p := cs.Volume.NewCreateVolumeParams(name)
// Retrieve the disk_offering ID
diskofferingid, e := retrieveID(cs, "disk_offering", d.Get("disk_offering").(string))
if e != nil {
return e.Error()
}
// Set the disk_offering ID
p.SetDiskofferingid(diskofferingid)
if d.Get("size").(int) != 0 {
// Set the volume size
p.SetSize(int64(d.Get("size").(int)))
}
// If there is a project supplied, we retrieve and set the project id
if project, ok := d.GetOk("project"); ok {
// Retrieve the project ID
projectid, e := retrieveID(cs, "project", project.(string))
if e != nil {
return e.Error()
}
// Set the default project ID
p.SetProjectid(projectid)
}
// Retrieve the zone ID
zoneid, e := retrieveID(cs, "zone", d.Get("zone").(string))
if e != nil {
return e.Error()
}
// Set the zone ID
p.SetZoneid(zoneid)
// Create the new volume
r, err := cs.Volume.CreateVolume(p)
if err != nil {
return fmt.Errorf("Error creating the new disk %s: %s", name, err)
}
// Set the volume ID and partials
d.SetId(r.Id)
d.SetPartial("name")
d.SetPartial("device")
d.SetPartial("disk_offering")
d.SetPartial("size")
d.SetPartial("virtual_machine")
d.SetPartial("project")
d.SetPartial("zone")
if d.Get("attach").(bool) {
err := resourceCloudStackDiskAttach(d, meta)
if err != nil {
return fmt.Errorf("Error attaching the new disk %s to virtual machine: %s", name, err)
}
// Set the additional partial
d.SetPartial("attach")
}
d.Partial(false)
return resourceCloudStackDiskRead(d, meta)
}
func resourceCloudStackDiskRead(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// Get the volume details
v, count, err := cs.Volume.GetVolumeByID(d.Id())
if err != nil {
if count == 0 {
d.SetId("")
return nil
}
return err
}
d.Set("name", v.Name)
d.Set("attach", v.Attached != "") // If attached this will contain a timestamp when attached
d.Set("size", int(v.Size/(1024*1024*1024))) // Needed to get GB's again
setValueOrID(d, "disk_offering", v.Diskofferingname, v.Diskofferingid)
setValueOrID(d, "project", v.Project, v.Projectid)
setValueOrID(d, "zone", v.Zonename, v.Zoneid)
if v.Attached != "" {
// Get the virtual machine details
vm, _, err := cs.VirtualMachine.GetVirtualMachineByID(v.Virtualmachineid)
if err != nil {
return err
}
// Get the guest OS type details
os, _, err := cs.GuestOS.GetOsTypeByID(vm.Guestosid)
if err != nil {
return err
}
// Get the guest OS category details
c, _, err := cs.GuestOS.GetOsCategoryByID(os.Oscategoryid)
if err != nil {
return err
}
d.Set("device", retrieveDeviceName(v.Deviceid, c.Name))
setValueOrID(d, "virtual_machine", v.Vmname, v.Virtualmachineid)
}
return nil
}
func resourceCloudStackDiskUpdate(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
d.Partial(true)
name := d.Get("name").(string)
if d.HasChange("disk_offering") || d.HasChange("size") {
// Detach the volume (re-attach is done at the end of this function)
if err := resourceCloudStackDiskDetach(d, meta); err != nil {
return fmt.Errorf("Error detaching disk %s from virtual machine: %s", name, err)
}
// Create a new parameter struct
p := cs.Volume.NewResizeVolumeParams(d.Id())
// Retrieve the disk_offering ID
diskofferingid, e := retrieveID(cs, "disk_offering", d.Get("disk_offering").(string))
if e != nil {
return e.Error()
}
// Set the disk_offering ID
p.SetDiskofferingid(diskofferingid)
if d.Get("size").(int) != 0 {
// Set the size
p.SetSize(int64(d.Get("size").(int)))
}
// Set the shrink bit
p.SetShrinkok(d.Get("shrink_ok").(bool))
// Change the disk_offering
r, err := cs.Volume.ResizeVolume(p)
if err != nil {
return fmt.Errorf("Error changing disk offering/size for disk %s: %s", name, err)
}
// Update the volume ID and set partials
d.SetId(r.Id)
d.SetPartial("disk_offering")
d.SetPartial("size")
}
// If the device changed, just detach here so we can re-attach the
// volume at the end of this function
if d.HasChange("device") || d.HasChange("virtual_machine") {
// Detach the volume
if err := resourceCloudStackDiskDetach(d, meta); err != nil {
return fmt.Errorf("Error detaching disk %s from virtual machine: %s", name, err)
}
}
if d.Get("attach").(bool) {
// Attach the volume
err := resourceCloudStackDiskAttach(d, meta)
if err != nil {
return fmt.Errorf("Error attaching disk %s to virtual machine: %s", name, err)
}
// Set the additional partials
d.SetPartial("attach")
d.SetPartial("device")
d.SetPartial("virtual_machine")
} else {
// Detach the volume
if err := resourceCloudStackDiskDetach(d, meta); err != nil {
return fmt.Errorf("Error detaching disk %s from virtual machine: %s", name, err)
}
}
d.Partial(false)
return resourceCloudStackDiskRead(d, meta)
}
func resourceCloudStackDiskDelete(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// Detach the volume
if err := resourceCloudStackDiskDetach(d, meta); err != nil {
return err
}
// Create a new parameter struct
p := cs.Volume.NewDeleteVolumeParams(d.Id())
// Delete the voluem
if _, err := cs.Volume.DeleteVolume(p); err != nil {
// This is a very poor way to be told the ID does no longer exist :(
if strings.Contains(err.Error(), fmt.Sprintf(
"Invalid parameter id value=%s due to incorrect long value format, "+
"or entity does not exist", d.Id())) {
return nil
}
return err
}
return nil
}
func resourceCloudStackDiskAttach(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// First check if the disk isn't already attached
if attached, err := isAttached(cs, d.Id()); err != nil || attached {
return err
}
// Retrieve the virtual_machine ID
virtualmachineid, e := retrieveID(cs, "virtual_machine", d.Get("virtual_machine").(string))
if e != nil {
return e.Error()
}
// Create a new parameter struct
p := cs.Volume.NewAttachVolumeParams(d.Id(), virtualmachineid)
if device, ok := d.GetOk("device"); ok {
// Retrieve the device ID
deviceid := retrieveDeviceID(device.(string))
if deviceid == -1 {
return fmt.Errorf("Device %s is not a valid device", device.(string))
}
// Set the device ID
p.SetDeviceid(deviceid)
}
// Attach the new volume
r, err := Retry(4, retryableAttachVolumeFunc(cs, p))
if err != nil {
return err
}
d.SetId(r.(*cloudstack.AttachVolumeResponse).Id)
return nil
}
func resourceCloudStackDiskDetach(d *schema.ResourceData, meta interface{}) error {
cs := meta.(*cloudstack.CloudStackClient)
// Check if the volume is actually attached, before detaching
if attached, err := isAttached(cs, d.Id()); err != nil || !attached {
return err
}
// Create a new parameter struct
p := cs.Volume.NewDetachVolumeParams()
// Set the volume ID
p.SetId(d.Id())
// Detach the currently attached volume
if _, err := cs.Volume.DetachVolume(p); err != nil {
// Retrieve the virtual_machine ID
virtualmachineid, e := retrieveID(cs, "virtual_machine", d.Get("virtual_machine").(string))
if e != nil {
return e.Error()
}
// Create a new parameter struct
pd := cs.VirtualMachine.NewStopVirtualMachineParams(virtualmachineid)
// Stop the virtual machine in order to be able to detach the disk
if _, err := cs.VirtualMachine.StopVirtualMachine(pd); err != nil {
return err
}
// Try again to detach the currently attached volume
if _, err := cs.Volume.DetachVolume(p); err != nil {
return err
}
// Create a new parameter struct
pu := cs.VirtualMachine.NewStartVirtualMachineParams(virtualmachineid)
// Start the virtual machine again
if _, err := cs.VirtualMachine.StartVirtualMachine(pu); err != nil {
return err
}
}
return nil
}
func isAttached(cs *cloudstack.CloudStackClient, id string) (bool, error) {
// Get the volume details
v, _, err := cs.Volume.GetVolumeByID(id)
if err != nil {
return false, err
}
return v.Attached != "", nil
}
func retryableAttachVolumeFunc(
cs *cloudstack.CloudStackClient,
p *cloudstack.AttachVolumeParams) func() (interface{}, error) {
return func() (interface{}, error) {
r, err := cs.Volume.AttachVolume(p)
if err != nil {
return nil, err
}
return r, nil
}
}
func retrieveDeviceID(device string) int64 {
switch device {
case "/dev/xvdb", "D:":
return 1
case "/dev/xvdc", "E:":
return 2
case "/dev/xvde", "F:":
return 4
case "/dev/xvdf", "G:":
return 5
case "/dev/xvdg", "H:":
return 6
case "/dev/xvdh", "I:":
return 7
case "/dev/xvdi", "J:":
return 8
case "/dev/xvdj", "K:":
return 9
case "/dev/xvdk", "L:":
return 10
case "/dev/xvdl", "M:":
return 11
case "/dev/xvdm", "N:":
return 12
case "/dev/xvdn", "O:":
return 13
case "/dev/xvdo", "P:":
return 14
case "/dev/xvdp", "Q:":
return 15
default:
return -1
}
}
func retrieveDeviceName(device int64, os string) string {
switch device {
case 1:
if os == "Windows" {
return "D:"
}
return "/dev/xvdb"
case 2:
if os == "Windows" {
return "E:"
}
return "/dev/xvdc"
case 4:
if os == "Windows" {
return "F:"
}
return "/dev/xvde"
case 5:
if os == "Windows" {
return "G:"
}
return "/dev/xvdf"
case 6:
if os == "Windows" {
return "H:"
}
return "/dev/xvdg"
case 7:
if os == "Windows" {
return "I:"
}
return "/dev/xvdh"
case 8:
if os == "Windows" {
return "J:"
}
return "/dev/xvdi"
case 9:
if os == "Windows" {
return "K:"
}
return "/dev/xvdj"
case 10:
if os == "Windows" {
return "L:"
}
return "/dev/xvdk"
case 11:
if os == "Windows" {
return "M:"
}
return "/dev/xvdl"
case 12:
if os == "Windows" {
return "N:"
}
return "/dev/xvdm"
case 13:
if os == "Windows" {
return "O:"
}
return "/dev/xvdn"
case 14:
if os == "Windows" {
return "P:"
}
return "/dev/xvdo"
case 15:
if os == "Windows" {
return "Q:"
}
return "/dev/xvdp"
default:
return "unknown"
}
}