Expose created time and updated time to rootcoord metrics (#8174)

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

internal/rootcoord/metrics_info.go

@@ -43,8 +43,9 @@ func (c *Core) getSystemInfoMetrics(ctx context.Context, req *milvuspb.GetMetric
 					SystemVersion: os.Getenv(metricsinfo.GitCommitEnvKey),
 					DeployMode:    os.Getenv(metricsinfo.DeployModeEnvKey),
 				},
-				// TODO(dragondriver): CreatedTime & UpdatedTime, easy but time-costing
-				Type: typeutil.RootCoordRole,
+				CreatedTime: Params.CreatedTime.String(),
+				UpdatedTime: Params.UpdatedTime.String(),
+				Type:        typeutil.RootCoordRole,
 			},
 			SystemConfigurations: metricsinfo.RootCoordConfiguration{
 				MinSegmentSizeToEnableIndex: Params.MinSegmentSizeToEnableIndex,

internal/rootcoord/param_table.go

@@ -15,6 +15,7 @@ import (
 	"path"
 	"strings"
 	"sync"
+	"time"
 
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/util/paramtable"
@@ -47,6 +48,9 @@ type ParamTable struct {
 	Timeout          int
 	TimeTickInterval int
 
+	CreatedTime time.Time
+	UpdatedTime time.Time
+
 	Log log.Config
 
 	RoleName string

internal/rootcoord/param_table_test.go

@@ -13,6 +13,7 @@ package rootcoord
 
 import (
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -58,4 +59,9 @@ func TestParamTable(t *testing.T) {
 
 	assert.NotZero(t, Params.TimeTickInterval)
 	t.Logf("master timetickerInterval = %d", Params.TimeTickInterval)
+
+	Params.CreatedTime = time.Now()
+	Params.UpdatedTime = time.Now()
+	t.Logf("created time: %v", Params.CreatedTime)
+	t.Logf("updated time: %v", Params.UpdatedTime)
 }

internal/rootcoord/root_coord.go

@@ -1111,9 +1111,15 @@ func (c *Core) Start() error {
 		go c.sessionLoop()
 		go c.chanTimeTick.StartWatch(&c.wg)
 		go c.checkFlushedSegmentsLoop()
+
+		Params.CreatedTime = time.Now()
+		Params.UpdatedTime = time.Now()
+
 		c.stateCode.Store(internalpb.StateCode_Healthy)
 	})
+
 	log.Debug(typeutil.RootCoordRole, zap.String("State Code", internalpb.StateCode_name[int32(internalpb.StateCode_Healthy)]))
+
 	return nil
 }