Implement fs stats.

plugins/elasticsearch/elasticsearch.go

@@ -21,6 +21,7 @@ type node struct {
 	JVM        interface{}       `json:"jvm"`
 	ThreadPool interface{}       `json:"thread_pool"`
 	Network    interface{}       `json:"network"`
+	FS         interface{}       `json:"fs"`
 }
 
 const sampleConfig = `
@@ -119,6 +120,9 @@ func (e *Elasticsearch) gatherUrl(url string, acc plugins.Accumulator) error {
 		if err := e.parseInterface(acc, "network", tags, n.Network); err != nil {
 			return err
 		}
+		if err := e.parseInterface(acc, "fs", tags, n.FS); err != nil {
+			return err
+		}
 	}
 
 	return nil

plugins/elasticsearch/elasticsearch_test.go

@@ -74,4 +74,8 @@ func TestElasticsearch(t *testing.T) {
 	for key, val := range networkExpected {
 		assert.NoError(t, acc.ValidateTaggedValue(key, val, tags))
 	}
+
+	for key, val := range fsExpected {
+		assert.NoError(t, acc.ValidateTaggedValue(key, val, tags))
+	}
 }

plugins/elasticsearch/testdata_test.go

@@ -381,6 +381,25 @@ const statsResponse = `
           "in_errs": 0,
           "out_rsts": 0
         }
+      },
+      "fs": {
+        "timestamp": 1436460392946,
+        "total": {
+          "total_in_bytes": 19507089408,
+          "free_in_bytes": 16909316096,
+          "available_in_bytes": 15894814720
+        },
+        "data": [
+          {
+            "path": "/usr/share/elasticsearch/data/elasticsearch/nodes/0",
+            "mount": "/usr/share/elasticsearch/data",
+            "dev": "/dev/sda1",
+            "type": "ext4",
+            "total_in_bytes": 19507089408,
+            "free_in_bytes": 16909316096,
+            "available_in_bytes": 15894814720
+          }
+        ]
       }
     }
   }
@@ -641,3 +660,10 @@ var networkExpected = map[string]float64{
 	"network_tcp_estab_resets":  0,
 	"network_tcp_out_rsts":      0,
 }
+
+var fsExpected = map[string]float64{
+	"fs_timestamp":                1436460392946,
+	"fs_total_free_in_bytes":      16909316096,
+	"fs_total_available_in_bytes": 15894814720,
+	"fs_total_total_in_bytes":     19507089408,
+}