Add mongo document and connection metrics (#4362)

plugins/inputs/mongodb/mongodb_data.go

@@ -53,6 +53,13 @@ var DefaultStats = map[string]string{
 	"cursor_no_timeout":         "NoTimeoutC",
 	"cursor_pinned":             "PinnedC",
 	"cursor_total":              "TotalC",
+	"document_deleted":          "DeletedD",
+	"document_inserted":         "InsertedD",
+	"document_returned":         "ReturnedD",
+	"document_updated":          "UpdatedD",
+	"connections_current":       "CurrentC",
+	"connections_available":     "AvailableC",
+	"connections_total_created": "TotalCreatedC",
 }
 
 var DefaultReplStats = map[string]string{

plugins/inputs/mongodb/mongodb_data_test.go

@@ -38,6 +38,13 @@ func TestAddNonReplStats(t *testing.T) {
 			NoTimeoutC:       0,
 			PinnedC:          0,
 			TotalC:           0,
+			DeletedD:         0,
+			InsertedD:        0,
+			ReturnedD:        0,
+			UpdatedD:         0,
+			CurrentC:         0,
+			AvailableC:       0,
+			TotalCreatedC:    0,
 		},
 		tags,
 	)
@@ -219,6 +226,13 @@ func TestStateTag(t *testing.T) {
 		"cursor_no_timeout":         int64(0),
 		"cursor_pinned":             int64(0),
 		"cursor_total":              int64(0),
+		"document_deleted":          int64(0),
+		"document_inserted":         int64(0),
+		"document_returned":         int64(0),
+		"document_updated":          int64(0),
+		"connections_current":       int64(0),
+		"connections_available":     int64(0),
+		"connections_total_created": int64(0),
 	}
 	acc.AssertContainsTaggedFields(t, "mongodb", fields, stateTags)
 }

plugins/inputs/mongodb/mongostat.go

@@ -225,7 +225,7 @@ type FlushStats struct {
 type ConnectionStats struct {
 	Current      int64 `bson:"current"`
 	Available    int64 `bson:"available"`
-	TotalCreated int64 `bson:"totalCreated"`
+	TotalCreated int64 `bson:"total_created"`
 }
 
 // DurTiming stores information related to journaling.
@@ -291,6 +291,7 @@ type OpcountStats struct {
 type MetricsStats struct {
 	TTL      *TTLStats      `bson:"ttl"`
 	Cursor   *CursorStats   `bson:"cursor"`
+	Document *DocumentStats `bson:"document"`
 }
 
 // TTLStats stores information related to documents with a ttl index.
@@ -305,6 +306,14 @@ type CursorStats struct {
 	Open     *OpenCursorStats `bson:"open"`
 }
 
+// DocumentStats stores information related to document metrics.
+type DocumentStats struct {
+	Deleted  int64 `bson:"deleted"`
+	Inserted int64 `bson:"inserted"`
+	Returned int64 `bson:"returned"`
+	Updated  int64 `bson:"updated"`
+}
+
 // OpenCursorStats stores information related to open cursor metrics
 type OpenCursorStats struct {
 	NoTimeout int64 `bson:"noTimeout"`
@@ -457,6 +466,12 @@ type StatLine struct {
 	TimedOutC                   int64
 	NoTimeoutC, PinnedC, TotalC int64
 
+	// Document fields
+	DeletedD, InsertedD, ReturnedD, UpdatedD int64
+
+	// Connection fields
+	CurrentC, AvailableC, TotalCreatedC int64
+
 	// Collection locks (3.0 mmap only)
 	CollectionLocks *CollectionLockStatus