Repository: tikv/pd (go)

Issue:
The output is null when adding evict-leader-scheduler for second store
## Bug Report

<!-- Please answer these questions before submitting your issue. Thanks! -->

### What did you do?
add evict leader scheduler for two stores.
<!-- If possible, provide a recipe for reproducing the error. -->

### What did you expect to see?
Both output scheduler creation

### What did you see instead?
![image](https://github.com/tikv/pd/assets/23399268/3dec0281-fe58-47fa-b3d2-5bafd8132092)

### What version of PD are you using (`pd-server -V`)?


Pull request description:
scheduler: add aduit log for scheduler config API and add resp msg for evict-leader
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2. *: what's changed

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### What problem does this PR solve?

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Issue Number: Close #7672

### What is changed and how does it work?

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### Check List

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Tests

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- Unit test
- Integration test
- Manual test (add detailed scripts or steps below)
![image](https://github.com/tikv/pd/assets/23399268/532a1dc2-4d0b-4dc5-aac8-97007d5e0414)
> [2024/01/08 11:20:31.719 +08:00] [INFO] [audit.go:126] ["audit log"] [service-info="{ServiceLabel:HandleSchedulerConfig, Method:HTTP/1.1/DELETE:/pd/api/v1/scheduler-config/evict-leader-scheduler/delete/2, CallerID:pd-ctl, IP:127.0.0.1    , Port:58671, StartTime:2024-01-08 11:20:31 +0800 CST, URLParam:{}, BodyParam:}"]
> [2024/01/08 11:21:06.896 +08:00] [INFO] [audit.go:126] ["audit log"] [service-info="{ServiceLabel:HandleSchedulerConfig, Method:HTTP/1.1/POST:/pd/api/v1/scheduler-config/evict-leader-scheduler/config, CallerID:pd-ctl, IP:127.0.0.1, Po    rt:58851, StartTime:2024-01-08 11:21:06 +0800 CST, URLParam:{}, BodyParam:{\"name\":\"evict-leader-scheduler\",\"store_id\":2}}"]
Code changes

- Has the configuration change
- Has HTTP API interfaces changed (Don't forget to [add the declarative for the new API](https://github.com/tikv/pd/blob/master/docs/development.md#updating-api-documentation))
- Has persistent data change

Side effects

- Possible performance regression
- Increased code complexity
- Breaking backward compatibility

Related changes

- PR to update [`pingcap/docs`](https://github.com/pingcap/docs)/[`pingcap/docs-cn`](https://github.com/pingcap/docs-cn):
- PR to update [`pingcap/tiup`](https://github.com/pingcap/tiup):
- Need to cherry-pick to the release branch

### Release note

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Patch:
diff --git a/pkg/schedule/schedulers/evict_leader.go b/pkg/schedule/schedulers/evict_leader.go
index ae8b1ecf1..d2759e47d 100644
--- a/pkg/schedule/schedulers/evict_leader.go
+++ b/pkg/schedule/schedulers/evict_leader.go
@@ -392,7 +392,7 @@ func (handler *evictLeaderHandler) UpdateConfig(w http.ResponseWriter, r *http.R
 		handler.rd.JSON(w, http.StatusInternalServerError, err.Error())
 		return
 	}
-	handler.rd.JSON(w, http.StatusOK, nil)
+	handler.rd.JSON(w, http.StatusOK, "The scheduler has been applied to the store.")
 }
 
 func (handler *evictLeaderHandler) ListConfig(w http.ResponseWriter, r *http.Request) {
diff --git a/pkg/schedule/schedulers/evict_slow_store.go b/pkg/schedule/schedulers/evict_slow_store.go
index 713920828..79715a6fd 100644
--- a/pkg/schedule/schedulers/evict_slow_store.go
+++ b/pkg/schedule/schedulers/evict_slow_store.go
@@ -174,7 +174,7 @@ func (handler *evictSlowStoreHandler) UpdateConfig(w http.ResponseWriter, r *htt
 		return
 	}
 	log.Info("evict-slow-store-scheduler update 'recovery-duration' - unit: s", zap.Uint64("prev", prevRecoveryDurationGap), zap.Uint64("cur", recoveryDurationGap))
-	handler.rd.JSON(w, http.StatusOK, nil)
+	handler.rd.JSON(w, http.StatusOK, "Config updated.")
 }
 
 func (handler *evictSlowStoreHandler) ListConfig(w http.ResponseWriter, r *http.Request) {
diff --git a/pkg/schedule/schedulers/evict_slow_trend.go b/pkg/schedule/schedulers/evict_slow_trend.go
index 53e096bae..20c532197 100644
--- a/pkg/schedule/schedulers/evict_slow_trend.go
+++ b/pkg/schedule/schedulers/evict_slow_trend.go
@@ -260,7 +260,7 @@ func (handler *evictSlowTrendHandler) UpdateConfig(w http.ResponseWriter, r *htt
 		return
 	}
 	log.Info("evict-slow-trend-scheduler update 'recovery-duration' - unit: s", zap.Uint64("prev", prevRecoveryDurationGap), zap.Uint64("cur", recoveryDurationGap))
-	handler.rd.JSON(w, http.StatusOK, nil)
+	handler.rd.JSON(w, http.StatusOK, "Config updated.")
 }
 
 func (handler *evictSlowTrendHandler) ListConfig(w http.ResponseWriter, r *http.Request) {
diff --git a/pkg/schedule/schedulers/grant_leader.go b/pkg/schedule/schedulers/grant_leader.go
index 027350536..13f7c5e28 100644
--- a/pkg/schedule/schedulers/grant_leader.go
+++ b/pkg/schedule/schedulers/grant_leader.go
@@ -303,7 +303,7 @@ func (handler *grantLeaderHandler) UpdateConfig(w http.ResponseWriter, r *http.R
 		handler.rd.JSON(w, http.StatusInternalServerError, err.Error())
 		return
 	}
-	handler.rd.JSON(w, http.StatusOK, nil)
+	handler.rd.JSON(w, http.StatusOK, "The scheduler has been applied to the store.")
 }
 
 func (handler *grantLeaderHandler) ListConfig(w http.ResponseWriter, r *http.Request) {
diff --git a/server/api/router.go b/server/api/router.go
index d3c8f10cb..fc963d6a2 100644
--- a/server/api/router.go
+++ b/server/api/router.go
@@ -88,10 +88,10 @@ func getFunctionName(f interface{}) string {
 // @BasePath       /pd/api/v1
 func createRouter(prefix string, svr *server.Server) *mux.Router {
 	serviceMiddle := newServiceMiddlewareBuilder(svr)
-	registerPrefix := func(router *mux.Router, prefixPath string,
+	registerPrefix := func(router *mux.Router, prefixPath, name string,
 		handleFunc func(http.ResponseWriter, *http.Request), opts ...createRouteOption) {
 		routeCreateFunc(router.PathPrefix(prefixPath), serviceMiddle.createHandler(handleFunc),
-			getFunctionName(handleFunc), opts...)
+			name, opts...)
 	}
 	registerFunc := func(router *mux.Router, path string,
 		handleFunc func(http.ResponseWriter, *http.Request), opts ...createRouteOption) {
@@ -151,7 +151,8 @@ func createRouter(prefix string, svr *server.Server) *mux.Router {
 	registerFunc(clusterRouter, "/schedulers/diagnostic/{name}", diagnosticHandler.GetDiagnosticResult, setMethods(http.MethodGet), setAuditBackend(prometheus))
 
 	schedulerConfigHandler := newSchedulerConfigHandler(svr, rd)
-	registerPrefix(apiRouter, "/scheduler-config", schedulerConfigHandler.GetSchedulerConfig, setAuditBackend(prometheus))
+	registerPrefix(apiRouter, "/scheduler-config", "HandleSchedulerConfig", schedulerConfigHandler.HandleSchedulerConfig, setMethods(http.MethodPost, http.MethodDelete, http.MethodPut, http.MethodPatch), setAuditBackend(localLog, prometheus))
+	registerPrefix(apiRouter, "/scheduler-config", "GetSchedulerConfig", schedulerConfigHandler.HandleSchedulerConfig, setMethods(http.MethodGet), setAuditBackend(prometheus))
 
 	clusterHandler := newClusterHandler(svr, rd)
 	registerFunc(apiRouter, "/cluster", clusterHandler.GetCluster, setMethods(http.MethodGet), setAuditBackend(prometheus))
@@ -373,7 +374,7 @@ func createRouter(prefix string, svr *server.Server) *mux.Router {
 
 	// API to set or unset failpoints
 	if enableFailPointAPI {
-		registerPrefix(apiRouter, "/fail", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		registerPrefix(apiRouter, "/fail", "FailPoint", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			// The HTTP handler of failpoint requires the full path to be the failpoint path.
 			r.URL.Path = strings.TrimPrefix(r.URL.Path, prefix+apiPrefix+"/fail")
 			new(failpoint.HttpHandler).ServeHTTP(w, r)
diff --git a/server/api/scheduler.go b/server/api/scheduler.go
index dea798edb..e28e852b0 100644
--- a/server/api/scheduler.go
+++ b/server/api/scheduler.go
@@ -309,7 +309,7 @@ func newSchedulerConfigHandler(svr *server.Server, rd *render.Render) *scheduler
 	}
 }
 
-func (h *schedulerConfigHandler) GetSchedulerConfig(w http.ResponseWriter, r *http.Request) {
+func (h *schedulerConfigHandler) HandleSchedulerConfig(w http.ResponseWriter, r *http.Request) {
 	handler := h.svr.GetHandler()
 	sh, err := handler.GetSchedulerConfigHandler()
 	if err == nil && sh != nil {


Test patch:
diff --git a/server/api/server_test.go b/server/api/server_test.go
index 38adab2de..7ebee9bcd 100644
--- a/server/api/server_test.go
+++ b/server/api/server_test.go
@@ -223,7 +223,10 @@ func (suite *serviceTestSuite) TestServiceLabels() {
 	accessPaths = suite.svr.GetServiceLabels("GetSchedulerConfig")
 	re.Len(accessPaths, 1)
 	re.Equal("/pd/api/v1/scheduler-config", accessPaths[0].Path)
-	re.Equal("", accessPaths[0].Method)
+	re.Equal("GET", accessPaths[0].Method)
+	accessPaths = suite.svr.GetServiceLabels("HandleSchedulerConfig")
+	re.Len(accessPaths, 4)
+	re.Equal("/pd/api/v1/scheduler-config", accessPaths[0].Path)
 
 	accessPaths = suite.svr.GetServiceLabels("ResignLeader")
 	re.Len(accessPaths, 1)
diff --git a/tools/pd-ctl/tests/scheduler/scheduler_test.go b/tools/pd-ctl/tests/scheduler/scheduler_test.go
index b7234afa6..ab96d4305 100644
--- a/tools/pd-ctl/tests/scheduler/scheduler_test.go
+++ b/tools/pd-ctl/tests/scheduler/scheduler_test.go
@@ -389,9 +389,13 @@ func (suite *schedulerTestSuite) checkScheduler(cluster *pdTests.TestCluster) {
 	echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "balance-region-scheduler"}, nil)
 	re.Contains(echo, "Success!")
 	echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "evict-leader-scheduler", "1"}, nil)
-	re.Contains(echo, "Success!")
+	re.Contains(echo, "Success! The scheduler is created.")
+	echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "add", "evict-leader-scheduler", "2"}, nil)
+	re.Contains(echo, "Success! The scheduler has been applied to the store.")
 	echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "remove", "evict-leader-scheduler-1"}, nil)
 	re.Contains(echo, "Success!")
+	echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "remove", "evict-leader-scheduler-2"}, nil)
+	re.Contains(echo, "Success!")
 	echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "remove", "evict-leader-scheduler-1"}, nil)
 	re.Contains(echo, "404")
 	testutil.Eventually(re, func() bool { // wait for removed scheduler to be synced to scheduling server.
@@ -551,7 +555,7 @@ func (suite *schedulerTestSuite) checkScheduler(cluster *pdTests.TestCluster) {
 			return strings.Contains(echo, schedulerName)
 		})
 		echo = mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", schedulerName, "set", "recovery-duration", "100"}, nil)
-		re.Contains(echo, "Success!")
+		re.Contains(echo, "Success! Config updated.")
 		conf = make(map[string]interface{})
 		testutil.Eventually(re, func() bool {
 			mustExec(re, cmd, []string{"-u", pdAddr, "scheduler", "config", schedulerName, "show"}, &conf)