Expose created time and updated time to indexnode metrics (#8592)

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

internal/indexnode/indexnode.go

@@ -167,6 +167,9 @@ func (i *IndexNode) Start() error {
 	i.once.Do(func() {
 		startErr = i.sched.Start()
 
+		Params.CreatedTime = time.Now()
+		Params.UpdatedTime = time.Now()
+
 		//start liveness check
 		go i.session.LivenessCheck(i.loopCtx, i.liveCh, func() {
 			i.Stop()

internal/indexnode/metrics_info.go

@@ -45,7 +45,8 @@ func getSystemInfoMetrics(
 				SystemVersion: os.Getenv(metricsinfo.GitCommitEnvKey),
 				DeployMode:    os.Getenv(metricsinfo.DeployModeEnvKey),
 			},
-			// TODO(dragondriver): CreatedTime & UpdatedTime, easy but time-costing
+			CreatedTime: Params.CreatedTime.String(),
+			UpdatedTime: Params.UpdatedTime.String(),
 			Type:        typeutil.IndexNodeRole,
 		},
 		SystemConfigurations: metricsinfo.IndexNodeConfiguration{

internal/indexnode/param_table.go

@@ -17,6 +17,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"go.uber.org/zap"
 
@@ -49,6 +50,9 @@ type ParamTable struct {
 
 	SimdType string
 
+	CreatedTime time.Time
+	UpdatedTime time.Time
+
 	Log log.Config
 }
 

internal/indexnode/param_table_test.go

@@ -13,6 +13,7 @@ package indexnode
 
 import (
 	"testing"
+	"time"
 )
 
 func TestParamTable(t *testing.T) {
@@ -71,6 +72,16 @@ func TestParamTable(t *testing.T) {
 	})
 
 	// FIXME(dragondriver): how to cover panic case? we use `LoadWithDefault` to initialize `SimdType`
+
+	t.Run("CreatedTime", func(t *testing.T) {
+		Params.CreatedTime = time.Now()
+		t.Logf("CreatedTime: %v", Params.CreatedTime)
+	})
+
+	t.Run("UpdatedTime", func(t *testing.T) {
+		Params.UpdatedTime = time.Now()
+		t.Logf("UpdatedTime: %v", Params.UpdatedTime)
+	})
 }
 
 //TODO: Params Load should be return error when key does not exist.