Expose created time and updated time to querynode metrics (#9738)

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

internal/querynode/metrics_info.go

@@ -44,8 +44,9 @@ func getSystemInfoMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest,
 				SystemVersion: os.Getenv(metricsinfo.GitCommitEnvKey),
 				DeployMode:    os.Getenv(metricsinfo.DeployModeEnvKey),
 			},
-			// TODO(dragondriver): CreatedTime & UpdatedTime, easy but time-costing
-			Type: typeutil.QueryNodeRole,
+			CreatedTime: Params.CreatedTime.String(),
+			UpdatedTime: Params.UpdatedTime.String(),
+			Type:        typeutil.QueryNodeRole,
 		},
 		SystemConfigurations: metricsinfo.QueryNodeConfiguration{
 			SearchReceiveBufSize:         Params.SearchReceiveBufSize,

internal/querynode/param_table.go

@@ -16,6 +16,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"go.uber.org/zap"
 
@@ -76,6 +77,9 @@ type ParamTable struct {
 	// segcore
 	ChunkRows int64
 	SimdType  string
+
+	CreatedTime time.Time
+	UpdatedTime time.Time
 }
 
 var Params ParamTable

internal/querynode/query_node.go

@@ -30,6 +30,7 @@ import (
 	"strconv"
 	"sync"
 	"sync/atomic"
+	"time"
 	"unsafe"
 
 	"go.uber.org/zap"
@@ -214,6 +215,9 @@ func (node *QueryNode) Start() error {
 		node.Stop()
 	})
 
+	Params.CreatedTime = time.Now()
+	Params.UpdatedTime = time.Now()
+
 	node.UpdateStateCode(internalpb.StateCode_Healthy)
 	return nil
 }