Implement breakers stats.

plugins/elasticsearch/elasticsearch.go

@@ -24,6 +24,7 @@ type node struct {
 	FS         interface{}       `json:"fs"`
 	Transport  interface{}       `json:"transport"`
 	HTTP       interface{}       `json:"http"`
+	Breakers   interface{}       `json:"breakers"`
 }
 
 const sampleConfig = `
@@ -131,6 +132,9 @@ func (e *Elasticsearch) gatherUrl(url string, acc plugins.Accumulator) error {
 		if err := e.parseInterface(acc, "http", tags, n.HTTP); err != nil {
 			return err
 		}
+		if err := e.parseInterface(acc, "breakers", tags, n.Breakers); err != nil {
+			return err
+		}
 	}
 
 	return nil

plugins/elasticsearch/elasticsearch_test.go

@@ -85,4 +85,7 @@ func TestElasticsearch(t *testing.T) {
 	for key, val := range httpExpected {
 		assert.NoError(t, acc.ValidateTaggedValue(key, val, tags))
 	}
+	for key, val := range breakersExpected {
+		assert.NoError(t, acc.ValidateTaggedValue(key, val, tags))
+	}
 }

plugins/elasticsearch/testdata_test.go

@@ -411,6 +411,32 @@ const statsResponse = `
       "http": {
         "current_open": 3,
         "total_opened": 3
+      },
+      "breakers": {
+        "fielddata": {
+          "limit_size_in_bytes": 623326003,
+          "limit_size": "594.4mb",
+          "estimated_size_in_bytes": 0,
+          "estimated_size": "0b",
+          "overhead": 1.03,
+          "tripped": 0
+        },
+        "request": {
+          "limit_size_in_bytes": 415550668,
+          "limit_size": "396.2mb",
+          "estimated_size_in_bytes": 0,
+          "estimated_size": "0b",
+          "overhead": 1.0,
+          "tripped": 0
+        },
+        "parent": {
+          "limit_size_in_bytes": 727213670,
+          "limit_size": "693.5mb",
+          "estimated_size_in_bytes": 0,
+          "estimated_size": "0b",
+          "overhead": 1.0,
+          "tripped": 0
+        }
       }
     }
   }
@@ -691,3 +717,18 @@ var httpExpected = map[string]float64{
 	"http_current_open": 3,
 	"http_total_opened": 3,
 }
+
+var breakersExpected = map[string]float64{
+	"breakers_fielddata_estimated_size_in_bytes": 0,
+	"breakers_fielddata_overhead":                1.03,
+	"breakers_fielddata_tripped":                 0,
+	"breakers_fielddata_limit_size_in_bytes":     623326003,
+	"breakers_request_estimated_size_in_bytes":   0,
+	"breakers_request_overhead":                  1.0,
+	"breakers_request_tripped":                   0,
+	"breakers_request_limit_size_in_bytes":       415550668,
+	"breakers_parent_overhead":                   1.0,
+	"breakers_parent_tripped":                    0,
+	"breakers_parent_limit_size_in_bytes":        727213670,
+	"breakers_parent_estimated_size_in_bytes":    0,
+}