Add health status mapping from string to int in elasticsearch input (#3551)

plugins/inputs/elasticsearch/elasticsearch.go

@@ -143,6 +143,19 @@ func NewElasticsearch() *Elasticsearch {
 	}
 }
 
+// perform status mapping
+func mapHealthStatusToCode(s string) int {
+	switch strings.ToLower(s) {
+	case "green":
+		return 1
+	case "yellow":
+		return 2
+	case "red":
+		return 3
+	}
+	return 0
+}
+
 // SampleConfig returns sample configuration for this plugin.
 func (e *Elasticsearch) SampleConfig() string {
 	return sampleConfig
@@ -311,6 +324,7 @@ func (e *Elasticsearch) gatherClusterHealth(url string, acc telegraf.Accumulator
 	measurementTime := time.Now()
 	clusterFields := map[string]interface{}{
 		"status":                healthStats.Status,
+		"status_code":           mapHealthStatusToCode(healthStats.Status),
 		"timed_out":             healthStats.TimedOut,
 		"number_of_nodes":       healthStats.NumberOfNodes,
 		"number_of_data_nodes":  healthStats.NumberOfDataNodes,
@@ -330,6 +344,7 @@ func (e *Elasticsearch) gatherClusterHealth(url string, acc telegraf.Accumulator
 	for name, health := range healthStats.Indices {
 		indexFields := map[string]interface{}{
 			"status":                health.Status,
+			"status_code":           mapHealthStatusToCode(health.Status),
 			"number_of_shards":      health.NumberOfShards,
 			"number_of_replicas":    health.NumberOfReplicas,
 			"active_primary_shards": health.ActivePrimaryShards,