}

// HelpConfigKVHandler - GET /minio/admin/v3/help-config-kv?subSys={subSys}&key={key}
func (a adminAPIHandlers) HelpConfigKVHandler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	objectAPI, _ := validateAdminReq(ctx, w, r, policy.ConfigUpdateAdminAction)
	if objectAPI == nil {
		return
	}

	vars := mux.Vars(r)

	subSys := vars["subSys"]
	key := vars["key"]

	_, envOnly := r.Form["env"]

func (c Config) Merge() Config {
	cp := New()
	for subSys, tgtKV := range c {
		for tgt := range tgtKV {
			ckvs := c[subSys][tgt]
			for _, kv := range cp[subSys][Default] {
				_, ok := c[subSys][tgt].Lookup(kv.Key)
				if !ok {
					ckvs.Set(kv.Key, kv.Value)
				}
			}
			if _, ok := cp[subSys]; !ok {
				rnSubSys, ok := renamedSubsys[subSys]
				if !ok {

func GetHelp(subSys, key string, envOnly bool) (Help, error) {
	if len(subSys) == 0 {
		return Help{KeysHelp: config.HelpSubSysMap[subSys]}, nil
	}
	subSystemValue := strings.SplitN(subSys, config.SubSystemSeparator, 2)
	if len(subSystemValue) == 0 {
		return Help{}, config.Errorf("invalid number of arguments %s", subSys)
	}

	subSys = subSystemValue[0]

		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigInvalidIDPType), r.URL)
		return
	}

	var subSys string
	switch idpCfgType {
	case madmin.OpenidIDPCfg:
		subSys = madmin.IdentityOpenIDSubSys
	case madmin.LDAPIDPCfg:
		subSys = madmin.IdentityLDAPSubSys
	}

	cfgName := mux.Vars(r)["name"]
	cfgTarget := madmin.Default
	if cfgName != "" {
		cfgTarget = cfgName

		resourceMetricsMapMu.RLock()
		defer resourceMetricsMapMu.RUnlock()
		for _, subSys := range subSystems {
			stats, found := resourceMetricsMap[subSys]
			if found {
				requireAvgMax := true
				if subSys == driveSubsystem {
					requireAvgMax = false
				}
				for _, m := range stats {
					metrics = append(metrics, prepareResourceMetrics(m, subSys, requireAvgMax)...)
				}
			}
		}

		return metrics
	})

	if key != config.Default {
		envName = envName + config.Default + key
	}
	return env.Get(envName, defaultValue)
}

func lookupLegacyConfigForSubSys(ctx context.Context, subSys string) Config {
	cfg := NewConfig()
	switch subSys {
	case config.LoggerWebhookSubSys:
		var loggerTargets []string
		envs := env.List(legacyEnvLoggerHTTPEndpoint)
		for _, k := range envs {

func TestSubSysNotificationTargets(ctx context.Context, cfg config.Config, subSys string, transport *http.Transport) error {
	if err := checkValidNotificationKeysForSubSys(subSys, cfg[subSys]); err != nil {
		return err
	}

	targetList, err := fetchSubSysTargets(ctx, cfg, subSys, transport)
	if err != nil {
		return err
	}

	for _, target := range targetList {
		defer target.Close()
	}

		}

		// Enable config help in all modes.
		adminRouter.Methods(http.MethodGet).Path(adminVersion+"/help-config-kv").HandlerFunc(adminMiddleware(adminAPI.HelpConfigKVHandler, traceAllFlag)).Queries("subSys", "{subSys:.*}", "key", "{key:.*}")

		// Config KV history operations.
		if enableConfigOps {

}

// SignalService - sends signal to peer nodes.
func (client *peerRESTClient) SignalService(sig serviceSignal, subSys string, dryRun bool, execAt *time.Time) error {
	values := grid.NewMSS()
	values.Set(peerRESTSignal, strconv.Itoa(int(sig)))
	values.Set(peerRESTDryRun, strconv.FormatBool(dryRun))
	values.Set(peerRESTSubSys, subSys)
	if execAt != nil {
		values.Set(peerRESTExecAt, execAt.Format(time.RFC3339Nano))
	}

func (sys *NotificationSys) SignalConfigReload(subSys string) []NotificationPeerErr {
	ng := WithNPeers(len(sys.peerClients))
	for idx, client := range sys.peerClients {
		if client == nil {
			continue
		}
		client := client
		ng.Go(GlobalContext, func() error {
			return client.SignalService(serviceReloadDynamic, subSys, false, nil)
		}, idx, *client.host)
	}
	return ng.Wait()
}