Add support for AWS/ClientVPN (prometheus-community#1128)

Co-authored-by: Cristian Greco <[email protected]>

pkg/config/services.go

@@ -722,6 +722,16 @@ var SupportedServices = serviceConfigs{
 			regexp.MustCompile(":vpn-connection/(?P<VpnId>[^/]+)"),
 		},
 	},
+	{
+		Namespace: "AWS/ClientVPN",
+		Alias:     "clientvpn",
+		ResourceFilters: []*string{
+			aws.String("ec2:client-vpn-endpoint"),
+		},
+		DimensionRegexps: []*regexp.Regexp{
+			regexp.MustCompile(":client-vpn-endpoint/(?P<Endpoint>[^/]+)"),
+		},
+	},
 	{
 		Namespace: "AWS/WAFV2",
 		Alias:     "wafv2",

pkg/job/maxdimassociator/associator_client_vpn_test.go

@@ -0,0 +1,60 @@
+package maxdimassociator
+
+import (
+	"testing"
+
+	"github.com/grafana/regexp"
+	"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 clientVpn = &model.TaggedResource{
+	ARN:       "arn:aws:ec2:eu-central-1:075055617227:client-vpn-endpoint/cvpn-endpoint-0c9e5bd20be71e296",
+	Namespace: "AWS/ClientVPN",
+}
+
+func TestAssociatorClientVPN(t *testing.T) {
+	type args struct {
+		dimensionRegexps []*regexp.Regexp
+		resources        []*model.TaggedResource
+		metric           *model.Metric
+	}
+
+	type testCase struct {
+		name             string
+		args             args
+		expectedSkip     bool
+		expectedResource *model.TaggedResource
+	}
+
+	testcases := []testCase{
+		{
+			name: "should match ClientVPN with Endpoint dimension",
+			args: args{
+				dimensionRegexps: config.SupportedServices.GetService("AWS/ClientVPN").DimensionRegexps,
+				resources:        []*model.TaggedResource{clientVpn},
+				metric: &model.Metric{
+					MetricName: "CrlDaysToExpiry",
+					Namespace:  "AWS/ClientVPN",
+					Dimensions: []*model.Dimension{
+						{Name: "Endpoint", Value: "cvpn-endpoint-0c9e5bd20be71e296"},
+					},
+				},
+			},
+			expectedSkip:     false,
+			expectedResource: clientVpn,
+		},
+	}
+
+	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)
+		})
+	}
+}