Add auto-discovery for Directory Services(MicrosoftAD)

Signed-off-by: Ruslan Mustaev <ruslan.mustaev@orionhealth.com>

Author: RuslanMustaev

README.md

@@ -63,6 +63,7 @@ Only the latest version gets security updates. We won't support older versions.
   * `AWS/Cognito` - Cognito
   * `AWS/DataSync` - DataSync
   * `AWS/DDoSProtection` - Distributed Denial of Service (DDoS) protection service
+  * `AWS/DirectoryService` - Directory Services (MicrosoftAD)
   * `AWS/DMS` - Database Migration Service
   * `AWS/DocDB` - DocumentDB (with MongoDB compatibility)
   * `AWS/DX` - Direct Connect

examples/ds.yml

@@ -0,0 +1,19 @@
+apiVersion: v1alpha1
+discovery:
+  jobs:
+    - type: AWS/DirectoryService
+      regions:
+        - us-east-1
+      period: 300
+      length: 300
+      metrics:
+        - name: "Bytes Sent/sec"
+          statistics: [Average]
+        - name: "% Processor Time"
+          statistics: [Average]
+        - name: "DS Directory Searches/Sec"
+          statistics: [Average]
+        - name: "Database Cache % Hit"
+          statistics: [Average]
+        - name: "% Free Space"
+          statistics: [Sum]

pkg/config/services.go

@@ -243,6 +243,16 @@ var SupportedServices = serviceConfigs{
 			regexp.MustCompile(":agent/(?P<AgentId>[^/]+)"),
 		},
 	},
+	{
+		Namespace: "AWS/DirectoryService",
+		Alias:     "ds",
+		ResourceFilters: []*string{
+			aws.String("ds:directory"),
+		},
+		DimensionRegexps: []*regexp.Regexp{
+			regexp.MustCompile(":directory/(?P<Directory_ID>[^/]+)"),
+		},
+	},
 	{
 		Namespace: "AWS/DMS",
 		Alias:     "dms",

pkg/job/maxdimassociator/associator_ds_test.go

@@ -0,0 +1,61 @@
+package maxdimassociator
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/nerdswords/yet-another-cloudwatch-exporter/pkg/config"
+	"github.com/nerdswords/yet-another-cloudwatch-exporter/pkg/logging"
+	"github.com/nerdswords/yet-another-cloudwatch-exporter/pkg/model"
+)
+
+var directory = &model.TaggedResource{
+	ARN:       "arn:aws:ds::012345678901:directory/d-abc123",
+	Namespace: "AWS/DirectoryService",
+}
+
+func TestAssociatorDS(t *testing.T) {
+	type args struct {
+		dimensionRegexps []model.DimensionsRegexp
+		resources        []*model.TaggedResource
+		metric           *model.Metric
+	}
+
+	type testCase struct {
+		name             string
+		args             args
+		expectedSkip     bool
+		expectedResource *model.TaggedResource
+	}
+
+	testcases := []testCase{
+		{
+			name: "should match Virtual Interface with VirtualInterfaceId dimension",
+			args: args{
+				dimensionRegexps: config.SupportedServices.GetService("AWS/DirectoryService").ToModelDimensionsRegexp(),
+				resources:        []*model.TaggedResource{directory},
+				metric: &model.Metric{
+					MetricName: "Current Bandwidth",
+					Namespace:  "AWS/DirectoryService",
+					Dimensions: []model.Dimension{
+						{Name: "Metric Category", Value: "NTDS"},
+						{Name: "Domain Controller IP", Value: "123.123.123.123"},
+						{Name: "Directory ID", Value: "d-abc123"},
+					},
+				},
+			},
+			expectedSkip:     false,
+			expectedResource: directory,
+		},
+	}
+
+	for _, tc := range testcases {
+		t.Run(tc.name, func(t *testing.T) {
+			associator := NewAssociator(logging.NewNopLogger(), tc.args.dimensionRegexps, tc.args.resources)
+			res, skip := associator.AssociateMetricToResource(tc.args.metric)
+			require.Equal(t, tc.expectedSkip, skip)
+			require.Equal(t, tc.expectedResource, res)
+		})
+	}
+}