Expose created time and updated time to datacoord metrics (#8172)

Signed-off-by: Ndragondriver <jiquan.long@zilliz.com>

internal/datacoord/metrics_info.go

@@ -99,8 +99,9 @@ func (s *Server) getDataCoordMetrics() metricsinfo.DataCoordInfos {
 				SystemVersion: os.Getenv(metricsinfo.GitCommitEnvKey),
 				DeployMode:    os.Getenv(metricsinfo.DeployModeEnvKey),
 			},
-			// TODO(dragondriver): CreatedTime & UpdatedTime, easy but time-costing
-			Type: typeutil.DataCoordRole,
+			CreatedTime: Params.CreatedTime.String(),
+			UpdatedTime: Params.UpdatedTime.String(),
+			Type:        typeutil.DataCoordRole,
 		},
 		SystemConfigurations: metricsinfo.DataCoordConfiguration{
 			SegmentMaxSize: Params.SegmentMaxSize,

internal/datacoord/param_table.go

@@ -16,6 +16,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"github.com/milvus-io/milvus/internal/log"
 
@@ -59,6 +60,9 @@ type ParamTable struct {
 	SegmentInfoChannelName    string
 	DataCoordSubscriptionName string
 
+	CreatedTime time.Time
+	UpdatedTime time.Time
+
 	Log log.Config
 }
 

internal/datacoord/server.go

@@ -236,8 +236,13 @@ func (s *Server) Start() error {
 	if err := helper.Execute(); err != nil {
 		return err
 	}
+
+	Params.CreatedTime = time.Now()
+	Params.UpdatedTime = time.Now()
+
 	atomic.StoreInt64(&s.isServing, ServerStateHealthy)
 	log.Debug("dataCoordinator startup success")
+
 	return nil
 }