Add resource tagging support (#599)

* Add resource tagging support

* Apply arguable suggestions from code review

Co-authored-by: Casper da Costa-Luis <casper.dcl@physics.org>

Co-authored-by: Casper da Costa-Luis <casper.dcl@physics.org>

Author: 0x2b3bfa0

docs/resources/task.md

@@ -65,6 +65,7 @@ resource "iterative_task" "example" {
 - `storage.output` - (Optional) Results directory (**relative to `workdir`**) to download (default: no download).
 - `environment` - (Optional) Map of environment variable names and values for the task script. Empty string values are replaced with local environment values. Empty values may also be combined with a [glob](<https://en.wikipedia.org/wiki/Glob_(programming)>) name to import all matching variables.
 - `timeout` - (Optional) Maximum number of seconds to run before instances are force-terminated. The countdown is reset each time TPI auto-respawns a spot instance.
+- `tags` - (Optional) Map of tags for the created cloud resources.
 - `name` - (Optional) _Discouraged and may be removed in future - change the resource name instead, i.e. `resource "iterative_task" "some_other_example_name"`._ Deterministic task name (e.g. `name="Hello, World!"` always produces `id="tpi-hello-world-5kz6ldls-57wo7rsp"`).
 
 -> **Note:** `output` is relative to `workdir`, so `storage { workdir = "foo", output = "bar" }` means "upload `./foo/`, change working directory to the uploaded folder, run `script`, and download `bar` (i.e. `./foo/bar`)".

iterative/resource_task.go

@@ -156,6 +156,14 @@ func resourceTask() *schema.Resource {
 					Type: schema.TypeString,
 				},
 			},
+			"tags": {
+				Type:     schema.TypeMap,
+				ForceNew: true,
+				Optional: true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
 			"timeout": {
 				Type:     schema.TypeInt,
 				ForceNew: true,
@@ -283,6 +291,11 @@ func resourceTaskDelete(ctx context.Context, d *schema.ResourceData, m interface
 }
 
 func resourceTaskBuild(ctx context.Context, d *schema.ResourceData, m interface{}) (task.Task, error) {
+	tags := make(map[string]string)
+	for name, value := range d.Get("tags").(map[string]interface{}) {
+		tags[name] = value.(string)
+	}
+
 	v := make(map[string]*string)
 	for name, value := range d.Get("environment").(map[string]interface{}) {
 		v[name] = nil
@@ -309,6 +322,7 @@ func resourceTaskBuild(ctx context.Context, d *schema.ResourceData, m interface{
 			Update: d.Timeout(schema.TimeoutUpdate),
 			Delete: d.Timeout(schema.TimeoutDelete),
 		},
+		Tags: tags,
 	}
 
 	directory := ""