Add DigitalOcean datasource digitalocean_image

Add a new data source for Digital Ocean that finds snapshots by name.

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

builtin/providers/digitalocean/datasource_digitaloceal_image.go

@@ -0,0 +1,93 @@
+package digitalocean
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/digitalocean/godo"
+	"github.com/hashicorp/terraform/helper/schema"
+)
+
+func dataSourceDigitalOceanImage() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceDigitalOceanImageRead,
+		Schema: map[string]*schema.Schema{
+
+			"name": &schema.Schema{
+				Type:        schema.TypeString,
+				Required:    true,
+				Description: "name of the image",
+			},
+			// computed attributes
+			"image": &schema.Schema{
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "slug or id of the image",
+			},
+			"min_disk_size": &schema.Schema{
+				Type:        schema.TypeInt,
+				Computed:    true,
+				Description: "minimum disk size required by the image",
+			},
+			"private": &schema.Schema{
+				Type:        schema.TypeBool,
+				Computed:    true,
+				Description: "Is the image private or non-private",
+			},
+			"regions": &schema.Schema{
+				Type:        schema.TypeList,
+				Computed:    true,
+				Description: "list of the regions that the image is available in",
+				Elem:        &schema.Schema{Type: schema.TypeString},
+			},
+			"type": &schema.Schema{
+				Type:        schema.TypeString,
+				Computed:    true,
+				Description: "type of the image",
+			},
+		},
+	}
+}
+
+func dataSourceDigitalOceanImageRead(d *schema.ResourceData, meta interface{}) error {
+	client := meta.(*godo.Client)
+
+	opts := &godo.ListOptions{}
+
+	images, _, err := client.Images.ListUser(opts)
+	if err != nil {
+		d.SetId("")
+		return err
+	}
+	image, err := findImageByName(images, d.Get("name").(string))
+
+	if err != nil {
+		return err
+	}
+
+	d.SetId(image.Name)
+	d.Set("name", image.Name)
+	d.Set("image", strconv.Itoa(image.ID))
+	d.Set("min_disk_size", image.MinDiskSize)
+	d.Set("private", !image.Public)
+	d.Set("regions", image.Regions)
+	d.Set("type", image.Type)
+
+	return nil
+}
+
+func findImageByName(images []godo.Image, name string) (*godo.Image, error) {
+	results := make([]godo.Image, 0)
+	for _, v := range images {
+		if v.Name == name {
+			results = append(results, v)
+		}
+	}
+	if len(results) == 1 {
+		return &results[0], nil
+	}
+	if len(results) == 0 {
+		return nil, fmt.Errorf("no user image found with name %s", name)
+	}
+	return nil, fmt.Errorf("too many user images found with name %s (found %d, expected 1)", name, len(results))
+}

builtin/providers/digitalocean/datasource_digitaloceal_image_test.go

@@ -0,0 +1,110 @@
+package digitalocean
+
+import (
+	"fmt"
+	"regexp"
+	"testing"
+
+	"github.com/digitalocean/godo"
+	"github.com/hashicorp/terraform/helper/acctest"
+	"github.com/hashicorp/terraform/helper/resource"
+	"github.com/hashicorp/terraform/terraform"
+)
+
+func TestAccDigitalOceanImage_Basic(t *testing.T) {
+	var droplet godo.Droplet
+	rInt := acctest.RandInt()
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckDigitalOceanDropletDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccCheckDigitalOceanDropletConfig_basic(rInt),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckDigitalOceanDropletExists("digitalocean_droplet.foobar", &droplet),
+					takeSnapshotOfDroplet(&droplet, rInt),
+				),
+				Destroy: false,
+			},
+			{
+				Config: testAccCheckDigitalOceanImageConfig_basic(rInt),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(
+						"data.digitalocean_image.foobar", "name", fmt.Sprintf("snap-%d", rInt)),
+					resource.TestCheckResourceAttr(
+						"data.digitalocean_image.foobar", "min_disk_size", "20"),
+					resource.TestCheckResourceAttr(
+						"data.digitalocean_image.foobar", "private", "true"),
+					resource.TestCheckResourceAttr(
+						"data.digitalocean_image.foobar", "type", "snapshot"),
+				),
+				Destroy: false,
+			},
+			{
+				Config: testAccCheckDigitalOceanImageConfig_basic(rInt),
+				Check: resource.ComposeTestCheckFunc(
+					takeSnapshotOfDroplet(&droplet, rInt),
+				),
+				Destroy:     false,
+				ExpectError: regexp.MustCompile(`.*too many user images found with name snap-.*\ .found 2, expected 1.`),
+			},
+			{
+				Config:      testAccCheckDigitalOceanImageConfig_nonexisting(rInt),
+				Destroy:     false,
+				ExpectError: regexp.MustCompile(`.*no user image found with name snap-.*-nonexisting`),
+			},
+			{
+				Config: testAccCheckDigitalOceanDropletConfig_basic(rInt),
+				Check: resource.ComposeTestCheckFunc(
+					deleteSnapshotsOfDroplet(&droplet),
+				),
+			},
+		},
+	})
+}
+
+func takeSnapshotOfDroplet(droplet *godo.Droplet, rInt int) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		client := testAccProvider.Meta().(*godo.Client)
+		action, _, err := client.DropletActions.Snapshot((*droplet).ID, fmt.Sprintf("snap-%d", rInt))
+		if err != nil {
+			return err
+		}
+		waitForAction(client, action)
+		return nil
+	}
+}
+
+func deleteSnapshotsOfDroplet(droplet *godo.Droplet) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		client := testAccProvider.Meta().(*godo.Client)
+		snapshots := (*droplet).SnapshotIDs
+		for _, value := range snapshots {
+			_, err := client.Images.Delete(value)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+}
+
+func testAccCheckDigitalOceanImageConfig_basic(rInt int) string {
+	return fmt.Sprintf(`
+%s
+data "digitalocean_image" "foobar" {
+  name               = "snap-%d"
+}
+`, testAccCheckDigitalOceanDropletConfig_basic(rInt), rInt)
+}
+
+func testAccCheckDigitalOceanImageConfig_nonexisting(rInt int) string {
+	return fmt.Sprintf(`
+%s
+data "digitalocean_image" "foobar" {
+  name               = "snap-%d-nonexisting"
+}
+`, testAccCheckDigitalOceanDropletConfig_basic(rInt), rInt)
+}

builtin/providers/digitalocean/provider.go

@@ -17,6 +17,10 @@ func Provider() terraform.ResourceProvider {
 			},
 		},
 
+		DataSourcesMap: map[string]*schema.Resource{
+			"digitalocean_image": dataSourceDigitalOceanImage(),
+		},
+
 		ResourcesMap: map[string]*schema.Resource{
 			"digitalocean_domain":       resourceDigitalOceanDomain(),
 			"digitalocean_droplet":      resourceDigitalOceanDroplet(),

website/source/docs/providers/do/d/image.html.md

@@ -0,0 +1,46 @@
+---
+layout: "digitalocean"
+page_title: "DigitalOcean: digitalocean_image"
+sidebar_current: "docs-do-datasource-image"
+description: |-
+  Get information on an snapshot.
+---
+
+# digitalocean_image
+
+Get information on an snapshot images. The aim of this datasource is to enable
+you to build droplets based on snapshot names.
+
+An error is triggered if zero or more than one result is returned by the query.
+
+## Example Usage
+
+Option 1: From a name:
+
+Reference the name:
+
+```hcl
+data "digitalocean_image" "example1" {
+  name = "example-1.0.0"
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `name` - The name of the image.
+
+## Attributes Reference
+
+The following attributes are exported:
+
+* `name` - See Argument Reference above.
+* `image` - The id of the image.
+* `min_disk_size`: The minimum 'disk' required for the image.
+* `private` - Is image a public image or not. Public images represents
+  Linux distributions or Application, while non-public images represent
+  snapshots and backups and are only available within your account.
+* `regions`: The regions that the image is available in.
+* `size_gigabytes`: The size of the image in gigabytes.
+* `type`: Type of the image. Can be "snapshot" or "backup".