Add regions data source for Nomad.

nomad/data_source_regions.go

@@ -0,0 +1,37 @@
+package nomad
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/hashicorp/nomad/api"
+	"github.com/hashicorp/terraform/helper/schema"
+)
+
+func dataSourceRegions() *schema.Resource {
+	return &schema.Resource{
+		Read: genericSecretDataSourceRead,
+
+		Schema: map[string]*schema.Schema{
+			"regions": {
+				Type:     schema.TypeList,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+				Computed: true,
+			},
+		},
+	}
+}
+
+func genericSecretDataSourceRead(d *schema.ResourceData, meta interface{}) error {
+	client := meta.(*api.Client)
+
+	log.Printf("[DEBUG] Reading regions from Nomad")
+	resp, err := client.Regions().List()
+	if err != nil {
+		return fmt.Errorf("error reading regions from Nomad: %s", err)
+	}
+	log.Printf("[DEBUG] Read regions from Nomad")
+	d.SetId(client.Address() + "/regions")
+
+	return d.Set("regions", resp)
+}

nomad/data_source_regions_test.go

@@ -0,0 +1,53 @@
+package nomad
+
+import (
+	"fmt"
+	"strconv"
+	"testing"
+
+	"github.com/hashicorp/terraform/helper/resource"
+	"github.com/hashicorp/terraform/terraform"
+)
+
+func TestDataSourceRegions(t *testing.T) {
+	resource.Test(t, resource.TestCase{
+		Providers: testProviders,
+		PreCheck:  func() { testAccPreCheck(t) },
+		Steps: []resource.TestStep{
+			{
+				Config: testDataSourceRegions_config,
+				Check:  testDataSourceRegions_check,
+			},
+		},
+	})
+}
+
+var testDataSourceRegions_config = `
+
+data "nomad_regions" "test" {
+}
+
+`
+
+func testDataSourceRegions_check(s *terraform.State) error {
+	resourceState := s.Modules[0].Resources["data.nomad_regions.test"]
+	if resourceState == nil {
+		return fmt.Errorf("resource not found in state %v", s.Modules[0].Resources)
+	}
+
+	iState := resourceState.Primary
+	if iState == nil {
+		return fmt.Errorf("resource has no primary instance")
+	}
+
+	results, err := strconv.ParseInt(iState.Attributes["regions.#"], 10, 64)
+	if err != nil {
+		return fmt.Errorf("expected integer in state, got %s (%T)", iState.Attributes["regions.#"], iState.Attributes["regions.#"])
+	}
+
+	if results < 1 {
+		return fmt.Errorf("got %d regions, expected at least 1", results)
+	}
+
+	return nil
+}

nomad/provider.go

@@ -57,6 +57,10 @@ func Provider() terraform.ResourceProvider {
 			"nomad_acl_token":  resourceACLToken(),
 			"nomad_job":        resourceJob(),
 		},
+
+		DataSourcesMap: map[string]*schema.Resource{
+			"nomad_regions": dataSourceRegions(),
+		},
 	}
 }
 

website/docs/d/regions.html.markdown

@@ -0,0 +1,44 @@
+---
+layout: "nomad"
+page_title: "Nomad: nomad_regions"
+sidebar_current: "docs-nomad-datasource-regions"
+description: |-
+  Retrieve a list of regions available in Nomad.
+---
+
+# nomad_regions
+
+Retrieve a list of regions available in Nomad.
+
+## Example Usage
+
+```hcl
+data "nomad_regions" "regions" {
+}
+
+data "template_file" "jobs" {
+  count = "${length(data.nomad_regions.regions.regions)}"
+  template = <<EOT
+job "foo" {
+  datacenters = ["dc1"]
+  type = "service"
+  region = "$$region"
+  # ... rest of your job here
+}
+EOT
+  vars {
+    region = "${data.nomad_regions.regions[count.index]}"
+  }
+}
+
+resource "nomad_job" "app" {
+  count = "${length(data.nomad_regions.regions.regions)}"
+  jobspec = "${data.template_file.jobs[count.index].rendered}"
+}
+```
+
+## Attribute Reference
+
+The following attributes are exported:
+
+- `regions` `(list of strings)` - a list of regions available in the cluster.

website/nomad.erb

@@ -10,6 +10,15 @@
           <a href="/docs/providers/nomad/index.html">Nomad Provider</a>
         </li>
 
+        <li<%= sidebar_current("docs-nomad-datasource") %>>
+          <a href="#">Data Sources</a>
+          <ul class="nav nav-visible">
+            <li<%= sidebar_current("docs-nomad-datasource-regions") %>>
+              <a href="/docs/providers/nomad/d/regions.html">nomad_regions</a>
+            </li>
+          </ul>
+        </li>
+
         <li<%= sidebar_current("docs-nomad-resource") %>>
           <a href="#">Resources</a>
           <ul class="nav nav-visible">