Expose created time and updated time to querycoord metrics (#9732)

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

internal/querycoord/metrics_info.go

@@ -50,8 +50,9 @@ func getSystemInfoMetrics(
 					SystemVersion: os.Getenv(metricsinfo.GitCommitEnvKey),
 					DeployMode:    os.Getenv(metricsinfo.DeployModeEnvKey),
 				},
-				// TODO(dragondriver): CreatedTime & UpdatedTime, easy but time-costing
-				Type: typeutil.QueryCoordRole,
+				CreatedTime: Params.CreatedTime.String(),
+				UpdatedTime: Params.UpdatedTime.String(),
+				Type:        typeutil.QueryCoordRole,
 			},
 			SystemConfigurations: metricsinfo.QueryCoordConfiguration{
 				SearchChannelPrefix:       Params.SearchChannelPrefix,

internal/querycoord/param_table.go

@@ -16,6 +16,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"github.com/milvus-io/milvus/internal/log"
 	"github.com/milvus-io/milvus/internal/util/paramtable"
@@ -57,6 +58,9 @@ type ParamTable struct {
 	MinioSecretAccessKey string
 	MinioUseSSLStr       bool
 	MinioBucketName      string
+
+	CreatedTime time.Time
+	UpdatedTime time.Time
 }
 
 // Params are variables of the ParamTable type

internal/querycoord/query_coord.go

@@ -135,6 +135,10 @@ func (qc *QueryCoord) Init() error {
 func (qc *QueryCoord) Start() error {
 	qc.scheduler.Start()
 	log.Debug("start scheduler ...")
+
+	Params.CreatedTime = time.Now()
+	Params.UpdatedTime = time.Now()
+
 	qc.UpdateStateCode(internalpb.StateCode_Healthy)
 
 	qc.loopWg.Add(1)