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resource_server_image.go
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resource_server_image.go
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package ddcloud
import (
"fmt"
"log"
"regexp"
"github.com/DimensionDataResearch/go-dd-cloud-compute/compute"
)
const (
serverImageTypeOS = "os"
serverImageTypeCustomer = "customer"
serverImageTypeAuto = "auto"
)
func isUUID(str string) (bool, error) {
return regexp.Match(`[A-Fa-f0-9]{8}(-[A-Fa-f0-9]{4}){3}-[A-Fa-f0-9]{12}`, []byte(str))
}
func resolveServerImage(imageNameOrID string, imageType string, dataCenterID string, apiClient *compute.Client) (resolvedImage compute.Image, err error) {
isID, err := isUUID(imageNameOrID)
if err != nil {
return
}
var (
osImage *compute.OSImage
customerImage *compute.CustomerImage
)
switch imageType {
case serverImageTypeOS:
if isID {
osImage, err = lookupOSImageByID(imageNameOrID, apiClient)
if err != nil {
return
}
if osImage != nil {
resolvedImage = osImage
return
}
err = fmt.Errorf("Cannot find an OS image with Id '%s' in datacenter '%s'",
imageNameOrID,
dataCenterID,
)
} else {
osImage, err = lookupOSImageByName(imageNameOrID, dataCenterID, apiClient)
if err != nil {
return
}
if osImage != nil {
resolvedImage = osImage
return
}
err = fmt.Errorf("Cannot find an OS image named '%s' in datacenter '%s'",
imageNameOrID,
dataCenterID,
)
}
case serverImageTypeCustomer:
if isID {
customerImage, err = lookupCustomerImageByID(imageNameOrID, apiClient)
if err != nil {
return
}
if customerImage != nil {
resolvedImage = customerImage
return
}
err = fmt.Errorf("Cannot find a customer image with Id '%s' in datacenter '%s'",
imageNameOrID,
dataCenterID,
)
} else {
customerImage, err = lookupCustomerImageByName(imageNameOrID, dataCenterID, apiClient)
if err != nil {
return
}
if customerImage != nil {
resolvedImage = customerImage
return
}
err = fmt.Errorf("Cannot find a customer image named '%s' in datacenter '%s'",
imageNameOrID,
dataCenterID,
)
}
case serverImageTypeAuto:
if isID {
osImage, err = lookupOSImageByID(imageNameOrID, apiClient)
if err != nil {
return
}
if osImage != nil {
resolvedImage = osImage
return
}
// Fall back to customer image, if required.
customerImage, err = lookupCustomerImageByID(imageNameOrID, apiClient)
if err != nil {
return
}
if customerImage != nil {
resolvedImage = customerImage
return
}
err = fmt.Errorf("Cannot find an OS or customer image with Id '%s' in datacenter '%s'",
imageNameOrID,
dataCenterID,
)
} else {
osImage, err = lookupOSImageByName(imageNameOrID, dataCenterID, apiClient)
if err != nil {
return
}
if osImage != nil {
resolvedImage = osImage
return
}
// Fall back to customer image, if required.
customerImage, err = lookupCustomerImageByName(imageNameOrID, dataCenterID, apiClient)
if err != nil {
return
}
if customerImage != nil {
resolvedImage = customerImage
return
}
err = fmt.Errorf("Cannot find an OS or customer image named '%s' in datacenter '%s'",
imageNameOrID,
dataCenterID,
)
}
default:
err = fmt.Errorf("Invalid image type '%s'", imageType)
return
}
return
}
func lookupOSImageByID(imageID string, apiClient *compute.Client) (*compute.OSImage, error) {
log.Printf("Looking up OS image '%s' by Id...", imageID)
return apiClient.GetOSImage(imageID)
}
func lookupOSImageByName(imageName string, dataCenterID string, apiClient *compute.Client) (*compute.OSImage, error) {
log.Printf("Looking up OS image '%s' by name in datacenter '%s'...", imageName, dataCenterID)
return apiClient.FindOSImage(imageName, dataCenterID)
}
func lookupCustomerImageByID(imageID string, apiClient *compute.Client) (*compute.CustomerImage, error) {
log.Printf("Looking up customer image '%s' by Id...", imageID)
return apiClient.GetCustomerImage(imageID)
}
func lookupCustomerImageByName(imageName string, dataCenterID string, apiClient *compute.Client) (*compute.CustomerImage, error) {
log.Printf("Looking up customer image '%s' by name in datacenter '%s'...", imageName, dataCenterID)
return apiClient.FindCustomerImage(imageName, dataCenterID)
}