provider/datadog: Add aggregator method to timeboard graph resource

Adds aggregator argument to the timeboard graph resource.

Ex:
```
request {
  q = "top(avg:docker.cpu.system{*} by {container_name}, 10, 'mean', 'desc')"
  aggregator = "sum"
}
```

```
$ make testacc TEST=./builtin/providers/datadog TESTARGS='-run=TestAccDatadogTimeboard_update'
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/01/13 17:52:50 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/datadog -v -run=TestAccDatadogTimeboard_update -timeout 120m
=== RUN   TestAccDatadogTimeboard_update
--- PASS: TestAccDatadogTimeboard_update (82.60s)
PASS
ok      github.com/hashicorp/terraform/builtin/providers/datadog        82.619s
```

Fixes: #11168

builtin/providers/datadog/resource_datadog_timeboard.go

@@ -31,6 +31,11 @@ func resourceDatadogTimeboard() *schema.Resource {
 					Optional: true,
 					Default:  "line",
 				},
+				"aggregator": {
+					Type:         schema.TypeString,
+					Optional:     true,
+					ValidateFunc: validateAggregatorMethod,
+				},
 				"style": &schema.Schema{
 					Type:     schema.TypeMap,
 					Optional: true,
@@ -309,6 +314,7 @@ func appendRequests(datadogGraph *datadog.Graph, terraformRequests *[]interface{
 		d := datadog.GraphDefinitionRequest{
 			Query:      t["q"].(string),
 			Type:       t["type"].(string),
+			Aggregator: t["aggregator"].(string),
 		}
 		if stacked, ok := t["stacked"]; ok {
 			d.Stacked = stacked.(bool)
@@ -703,3 +709,18 @@ func resourceDatadogTimeboardExists(d *schema.ResourceData, meta interface{}) (b
 	}
 	return true, nil
 }
+
+func validateAggregatorMethod(v interface{}, k string) (ws []string, errors []error) {
+	value := v.(string)
+	validMethods := map[string]struct{}{
+		"average": {},
+		"max":     {},
+		"min":     {},
+		"sum":     {},
+	}
+	if _, ok := validMethods[value]; !ok {
+		errors = append(errors, fmt.Errorf(
+			`%q contains an invalid method %q. Valid methods are either "average", "max", "min", or "sum"`))
+	}
+	return
+}

builtin/providers/datadog/resource_datadog_timeboard_test.go

@@ -42,6 +42,7 @@ resource "datadog_timeboard" "acceptance_test" {
     viz = "timeseries"
     request {
       q = "avg:redis.mem.used{$host} - avg:redis.mem.lua{$host}, avg:redis.mem.lua{$host}"
+      aggregator = "sum"
       stacked = true
     }
     request {
@@ -53,6 +54,7 @@ resource "datadog_timeboard" "acceptance_test" {
       style {
         palette = "warm"
       }
+      aggregator = "max"
     }
   }
   template_variable {
@@ -90,6 +92,7 @@ resource "datadog_timeboard" "acceptance_test" {
     request {
       q = "sum:aws.elb.request_count{*}.as_count()"
       type = "line"
+      aggregator = "min"
       conditional_format {
         comparator = ">"
         value = "1000"
@@ -139,11 +142,14 @@ func TestAccDatadogTimeboard_update(t *testing.T) {
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.title", "Redis memory usage"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.viz", "timeseries"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.0.q", "avg:redis.mem.used{$host} - avg:redis.mem.lua{$host}, avg:redis.mem.lua{$host}"),
+			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.0.aggregator", "sum"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.0.stacked", "true"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.1.q", "avg:redis.mem.rss{$host}"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "template_variable.0.name", "host"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "template_variable.0.prefix", "host"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.2.type", "bars"),
+			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.2.q", "avg:redis.mem.rss{$host}"),
+			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.2.aggregator", "max"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.2.style.palette", "warm"),
 		),
 	}
@@ -166,6 +172,7 @@ func TestAccDatadogTimeboard_update(t *testing.T) {
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.title", "ELB Requests"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.viz", "query_value"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.0.q", "sum:aws.elb.request_count{*}.as_count()"),
+			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.0.aggregator", "min"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.0.type", "line"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.0.conditional_format.0.comparator", ">"),
 			resource.TestCheckResourceAttr("datadog_timeboard.acceptance_test", "graph.1.request.0.conditional_format.0.value", "1000"),
@@ -214,3 +221,32 @@ func checkDestroy(s *terraform.State) error {
 	}
 	return nil
 }
+
+func TestValidateAggregatorMethod(t *testing.T) {
+	validMethods := []string{
+		"average",
+		"max",
+		"min",
+		"sum",
+	}
+	for _, v := range validMethods {
+		_, errors := validateAggregatorMethod(v, "request")
+		if len(errors) != 0 {
+			t.Fatalf("%q should be a valid aggregator method: %q", v, errors)
+		}
+	}
+
+	invalidMethods := []string{
+		"avg",
+		"suM",
+		"m",
+		"foo",
+	}
+	for _, v := range invalidMethods {
+		_, errors := validateAggregatorMethod(v, "request")
+		if len(errors) == 0 {
+			t.Fatalf("%q should be an invalid aggregator method", v)
+		}
+	}
+
+}

website/source/docs/providers/datadog/r/timeboard.html.markdown

@@ -109,7 +109,8 @@ Nested `graph` `marker` blocks have the following structure:
 Nested `graph` `request` blocks have the following structure:
 
 * `q` - (Required) The query of the request. Pro tip: Use the JSON tab inside the Datadog UI to help build you query strings.
-* `stacked` - (Optional) Boolean value to determin if this is this a stacked area graph. Default: false (line chart).
+* `aggregator` - (Optional) The aggregation method used when the number of data points outnumbers the max that can be shown.
+* `stacked` - (Optional) Boolean value to determine if this is this a stacked area graph. Default: false (line chart).
 * `type` - (Optional) Choose how to draw the graph. For example: "lines", "bars" or "areas". Default: "lines".
 * `style` - (Optional) Nested block to customize the graph style.