add spans to search v2 (#92223)

add tracing spans to search v2 service

pkg/services/searchV2/http.go

@@ -6,10 +6,9 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/prometheus/client_golang/prometheus"
-
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana-plugin-sdk-go/data"
+	"github.com/prometheus/client_golang/prometheus"
 
 	"github.com/grafana/grafana/pkg/api/response"
 	"github.com/grafana/grafana/pkg/api/routing"
@@ -34,7 +33,9 @@ func (s *searchHTTPService) RegisterHTTPRoutes(storageRoute routing.RouteRegiste
 }
 
 func (s *searchHTTPService) doQuery(c *contextmodel.ReqContext) response.Response {
-	searchReadinessCheckResp := s.search.IsReady(c.Req.Context(), c.SignedInUser.GetOrgID())
+	ctx, span := tracer.Start(c.Req.Context(), "searchV2.doQuery")
+	defer span.End()
+	searchReadinessCheckResp := s.search.IsReady(ctx, c.SignedInUser.GetOrgID())
 	if !searchReadinessCheckResp.IsReady {
 		dashboardSearchNotServedRequestsCounter.With(prometheus.Labels{
 			"reason": searchReadinessCheckResp.Reason,
@@ -59,7 +60,7 @@ func (s *searchHTTPService) doQuery(c *contextmodel.ReqContext) response.Respons
 		return response.Error(http.StatusBadRequest, "error parsing body", err)
 	}
 
-	resp := s.search.doDashboardQuery(c.Req.Context(), c.SignedInUser, c.SignedInUser.GetOrgID(), *query)
+	resp := s.search.doDashboardQuery(ctx, c.SignedInUser, c.SignedInUser.GetOrgID(), *query)
 
 	if resp.Error != nil {
 		return response.Error(http.StatusInternalServerError, "error handling search request", resp.Error)

pkg/services/searchV2/service.go

@@ -9,6 +9,7 @@ import (
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
+	"go.opentelemetry.io/otel"
 
 	"github.com/grafana/grafana/pkg/infra/db"
 	"github.com/grafana/grafana/pkg/infra/log"
@@ -58,6 +59,7 @@ var (
 			Namespace: namespace,
 			Subsystem: subsystem,
 		})
+	tracer = otel.Tracer("github.com/grafana/grafana/pkg/services/searchv2")
 )
 
 type StandardSearchService struct {
@@ -120,6 +122,8 @@ func (s *StandardSearchService) IsDisabled() bool {
 }
 
 func (s *StandardSearchService) Run(ctx context.Context) error {
+	ctx, span := tracer.Start(ctx, "searchv2.Run")
+	defer span.End()
 	orgQuery := &org.SearchOrgsQuery{}
 	result, err := s.orgService.Search(ctx, orgQuery)
 	if err != nil {
@@ -146,6 +150,8 @@ func (s *StandardSearchService) RegisterDashboardIndexExtender(ext DashboardInde
 }
 
 func (s *StandardSearchService) getUser(ctx context.Context, backendUser *backend.User, orgId int64) (*user.SignedInUser, error) {
+	ctx, span := tracer.Start(ctx, "searchv2.getUser")
+	defer span.End()
 	// TODO: get user & user's permissions from the request context
 
 	var usr *user.SignedInUser
@@ -204,6 +210,8 @@ func (s *StandardSearchService) getUser(ctx context.Context, backendUser *backen
 }
 
 func (s *StandardSearchService) DoDashboardQuery(ctx context.Context, user *backend.User, orgID int64, q DashboardQuery) *backend.DataResponse {
+	ctx, span := tracer.Start(ctx, "searchv2.DoDashboardQuery")
+	defer span.End()
 	start := time.Now()
 
 	signedInUser, err := s.getUser(ctx, user, orgID)
@@ -232,6 +240,8 @@ func (s *StandardSearchService) DoDashboardQuery(ctx context.Context, user *back
 }
 
 func (s *StandardSearchService) doDashboardQuery(ctx context.Context, signedInUser *user.SignedInUser, orgID int64, q DashboardQuery) *backend.DataResponse {
+	ctx, span := tracer.Start(ctx, "searchv2.doDashboardQuery")
+	defer span.End()
 	rsp := &backend.DataResponse{}
 
 	filter, err := s.auth.GetDashboardReadFilter(ctx, orgID, signedInUser)

pkg/services/searchV2/usage.go

@@ -45,7 +45,7 @@ var (
 )
 
 func updateUsageStats(ctx context.Context, reader *bluge.Reader, logger log.Logger, tracer tracing.Tracer) {
-	ctx, span := tracer.Start(ctx, "searchV2 updateUsageStats")
+	ctx, span := tracer.Start(ctx, "searchV2.updateUsageStats")
 	defer span.End()
 	req := bluge.NewAllMatches(bluge.NewTermQuery("panel").SetField(documentFieldKind))
 	for _, usage := range panelUsage {