feat: dfdaemon get scheduler list dynamically from manager (#812)

* feat: dfdaemon get scheduler list dynamically from manager

Signed-off-by: Gaius <[email protected]>

api/manager/docs.go

@@ -3945,6 +3945,9 @@ var doc = `{
                 "config": {
                     "$ref": "#/definitions/types.CDNClusterConfig"
                 },
+                "is_default": {
+                    "type": "boolean"
+                },
                 "name": {
                     "type": "string"
                 }
@@ -4348,6 +4351,9 @@ var doc = `{
                 "config": {
                     "$ref": "#/definitions/types.CDNClusterConfig"
                 },
+                "is_default": {
+                    "type": "boolean"
+                },
                 "name": {
                     "type": "string"
                 }

api/manager/swagger.json

@@ -3931,6 +3931,9 @@
                 "config": {
                     "$ref": "#/definitions/types.CDNClusterConfig"
                 },
+                "is_default": {
+                    "type": "boolean"
+                },
                 "name": {
                     "type": "string"
                 }
@@ -4334,6 +4337,9 @@
                 "config": {
                     "$ref": "#/definitions/types.CDNClusterConfig"
                 },
+                "is_default": {
+                    "type": "boolean"
+                },
                 "name": {
                     "type": "string"
                 }

api/manager/swagger.yaml

@@ -317,6 +317,8 @@ definitions:
         type: string
       config:
         $ref: '#/definitions/types.CDNClusterConfig'
+      is_default:
+        type: boolean
       name:
         type: string
     required:
@@ -591,6 +593,8 @@ definitions:
         type: string
       config:
         $ref: '#/definitions/types.CDNClusterConfig'
+      is_default:
+        type: boolean
       name:
         type: string
     type: object

client/config/dynconfig.go

@@ -0,0 +1,199 @@
+/*
+ *     Copyright 2020 The Dragonfly Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"time"
+
+	logger "d7y.io/dragonfly/v2/internal/dflog"
+	"d7y.io/dragonfly/v2/internal/dfpath"
+	internaldynconfig "d7y.io/dragonfly/v2/internal/dynconfig"
+	"d7y.io/dragonfly/v2/manager/searcher"
+	"d7y.io/dragonfly/v2/pkg/rpc/manager"
+	managerclient "d7y.io/dragonfly/v2/pkg/rpc/manager/client"
+)
+
+var (
+	// Dynconfig configure the cache path
+	cachePath = filepath.Join(dfpath.DefaultCacheDir, "daemon_dynconfig")
+
+	// Watch dynconfig interval
+	watchInterval = 5 * time.Second
+)
+
+type DynconfigData struct {
+	Schedulers []*manager.Scheduler
+}
+
+type Dynconfig interface {
+	// Get the dynamic config from manager.
+	GetSchedulers() ([]*manager.Scheduler, error)
+
+	// Get the dynamic config from manager.
+	Get() (*DynconfigData, error)
+
+	// Register allows an instance to register itself to listen/observe events.
+	Register(Observer)
+
+	// Deregister allows an instance to remove itself from the collection of observers/listeners.
+	Deregister(Observer)
+
+	// Notify publishes new events to listeners.
+	Notify() error
+
+	// Serve the dynconfig listening service.
+	Serve() error
+
+	// Stop the dynconfig listening service.
+	Stop() error
+}
+
+type Observer interface {
+	// OnNotify allows an event to be "published" to interface implementations.
+	OnNotify(*DynconfigData)
+}
+
+type dynconfig struct {
+	*internaldynconfig.Dynconfig
+	observers map[Observer]struct{}
+	done      chan bool
+}
+
+func NewDynconfig(managerClient internaldynconfig.ManagerClient, expire time.Duration) (Dynconfig, error) {
+	client, err := internaldynconfig.New(
+		internaldynconfig.ManagerSourceType,
+		internaldynconfig.WithManagerClient(managerClient),
+		internaldynconfig.WithExpireTime(expire),
+		internaldynconfig.WithCachePath(cachePath),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	return &dynconfig{
+		observers: map[Observer]struct{}{},
+		done:      make(chan bool),
+		Dynconfig: client,
+	}, nil
+}
+
+func (d *dynconfig) GetSchedulers() ([]*manager.Scheduler, error) {
+	data, err := d.Get()
+	if err != nil {
+		return nil, err
+	}
+
+	return data.Schedulers, nil
+}
+
+func (d *dynconfig) Get() (*DynconfigData, error) {
+	var data DynconfigData
+	if err := d.Unmarshal(&data); err != nil {
+		return nil, err
+	}
+
+	return &data, nil
+}
+
+func (d *dynconfig) Register(l Observer) {
+	d.observers[l] = struct{}{}
+}
+
+func (d *dynconfig) Deregister(l Observer) {
+	delete(d.observers, l)
+}
+
+func (d *dynconfig) Notify() error {
+	data, err := d.Get()
+	if err != nil {
+		return err
+	}
+
+	for o := range d.observers {
+		o.OnNotify(data)
+	}
+
+	return nil
+}
+
+func (d *dynconfig) Serve() error {
+	if err := d.Notify(); err != nil {
+		return err
+	}
+
+	go d.watch()
+
+	return nil
+}
+
+func (d *dynconfig) watch() {
+	tick := time.NewTicker(watchInterval)
+
+	for {
+		select {
+		case <-tick.C:
+			if err := d.Notify(); err != nil {
+				logger.Error("dynconfig notify failed", err)
+			}
+		case <-d.done:
+			return
+		}
+	}
+}
+
+func (d *dynconfig) Stop() error {
+	close(d.done)
+	if err := os.Remove(cachePath); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+type managerClient struct {
+	managerclient.Client
+	hostOption HostOption
+}
+
+// New the manager client used by dynconfig
+func NewManagerClient(client managerclient.Client, hostOption HostOption) internaldynconfig.ManagerClient {
+	return &managerClient{
+		Client:     client,
+		hostOption: hostOption,
+	}
+}
+
+func (mc *managerClient) Get() (interface{}, error) {
+	schedulers, err := mc.ListSchedulers(&manager.ListSchedulersRequest{
+		SourceType: manager.SourceType_CLIENT_SOURCE,
+		HostName:   mc.hostOption.Hostname,
+		Ip:         mc.hostOption.ListenIP,
+		HostInfo: map[string]string{
+			searcher.ConditionSecurityDomain: mc.hostOption.SecurityDomain,
+			searcher.ConditionIDC:            mc.hostOption.IDC,
+			searcher.ConditionNetTopology:    mc.hostOption.NetTopology,
+			searcher.ConditionLocation:       mc.hostOption.Location,
+		},
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return schedulers, nil
+}