Associate Cassandra tables

Associates Amazon Keyspaces (for Apache Cassandra) tables based on the
metric dimensions, similar to many other services.

Signed-off-by: Johannes Gehrs <[email protected]>

pkg/config/services.go

@@ -222,6 +222,9 @@ var SupportedServices = serviceConfigs{
 		ResourceFilters: []*string{
 			aws.String("cassandra"),
 		},
+		DimensionRegexps: []*regexp.Regexp{
+			regexp.MustCompile("keyspace/(?P<Keyspace>[^/]+)/table/(?P<TableName>[^/]+)"),
+		},
 	},
 	{
 		Namespace: "AWS/CloudFront",

pkg/job/maxdimassociator/associator_cassandra_test.go

@@ -0,0 +1,76 @@
+// Copyright 2024 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package maxdimassociator
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/prometheus-community/yet-another-cloudwatch-exporter/pkg/config"
+	"github.com/prometheus-community/yet-another-cloudwatch-exporter/pkg/logging"
+	"github.com/prometheus-community/yet-another-cloudwatch-exporter/pkg/model"
+)
+
+var keyspacesTable = &model.TaggedResource{
+	ARN:       "arn:aws:cassandra:eu-west-1:123456789012:/keyspace/my_keyspace/table/my_table",
+	Namespace: "AWS/Cassanrdra",
+}
+
+var cassandraResources = []*model.TaggedResource{
+	keyspacesTable,
+}
+
+func TestAssociatorCassandra(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: "keyspace should match with clusterId dimension",
+			args: args{
+				dimensionRegexps: config.SupportedServices.GetService("AWS/Cassandra").ToModelDimensionsRegexp(),
+				resources:        cassandraResources,
+				metric: &model.Metric{
+					MetricName: "BillableTableSizeInBytes",
+					Namespace:  "AWS/Cassandra",
+					Dimensions: []model.Dimension{
+						{Name: "Keyspace", Value: "my_keyspace"},
+						{Name: "TableName", Value: "my_table"},
+					},
+				},
+			},
+			expectedSkip:     false,
+			expectedResource: keyspacesTable,
+		},
+	}
+
+	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)
+		})
+	}
+}