Merge pull request #146 from bborysenko/wsrep_cluster_status

Fix wsrep_cluster_status

Author: SuperQ

collector/collector.go

@@ -39,6 +39,13 @@ func parseStatus(data sql.RawBytes) (float64, bool) {
 	if bytes.Compare(data, []byte("Connecting")) == 0 {
 		return 0, true
 	}
+	// SHOW GLOBAL STATUS like 'wsrep_cluster_status' can return "Primary" or "Non-Primary"/"Disconnected"
+	if bytes.Compare(data, []byte("Primary")) == 0 {
+		return 1, true
+	}
+	if bytes.Compare(data, []byte("Non-Primary")) == 0 || bytes.Compare(data, []byte("Disconnected")) == 0 {
+		return 0, true
+	}
 	if logNum := logRE.Find(data); logNum != nil {
 		value, err := strconv.ParseFloat(string(logNum), 64)
 		return value, err == nil