优化源站调度

internal/nodes/origin_state_manager.go

@@ -0,0 +1,172 @@
+// Copyright 2021 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+
+package nodes
+
+import (
+	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs"
+	"github.com/TeaOSLab/EdgeNode/internal/events"
+	"github.com/TeaOSLab/EdgeNode/internal/remotelogs"
+	"github.com/iwind/TeaGo/Tea"
+	"sync"
+	"time"
+)
+
+var SharedOriginStateManager = NewOriginStateManager()
+
+func init() {
+	events.On(events.EventLoaded, func() {
+		go SharedOriginStateManager.Start()
+	})
+}
+
+// OriginStateManager 源站状态管理
+type OriginStateManager struct {
+	stateMap map[int64]*OriginState // originId => *OriginState
+
+	ticker *time.Ticker
+	locker sync.RWMutex
+}
+
+// NewOriginStateManager 获取新管理对象
+func NewOriginStateManager() *OriginStateManager {
+	return &OriginStateManager{
+		stateMap: map[int64]*OriginState{},
+		ticker:   time.NewTicker(60 * time.Second),
+	}
+}
+
+// Start 启动
+func (this *OriginStateManager) Start() {
+	events.On(events.EventReload, func() {
+		this.locker.Lock()
+		this.stateMap = map[int64]*OriginState{}
+		this.locker.Unlock()
+	})
+
+	if Tea.IsTesting() {
+		this.ticker = time.NewTicker(10 * time.Second)
+	}
+	for range this.ticker.C {
+		err := this.Loop()
+		if err != nil {
+			remotelogs.Error("ORIGIN_MANAGER", err.Error())
+		}
+	}
+}
+
+// Loop 单次循环检查
+func (this *OriginStateManager) Loop() error {
+	if sharedNodeConfig == nil {
+		return nil
+	}
+
+	var currentStates = []*OriginState{}
+	this.locker.Lock()
+	for originId, state := range this.stateMap {
+		// 检查Origin是否正在使用
+		config := sharedNodeConfig.FindOrigin(originId)
+		if config == nil || !config.IsOn {
+			delete(this.stateMap, originId)
+			continue
+		}
+		state.Config = config
+		currentStates = append(currentStates, state)
+	}
+	this.locker.Unlock()
+
+	if len(currentStates) == 0 {
+		return nil
+	}
+
+	var count = len(currentStates)
+	wg := &sync.WaitGroup{}
+	wg.Add(count)
+	for _, state := range currentStates {
+		go func(state *OriginState) {
+			defer wg.Done()
+			conn, err := OriginConnect(state.Config, "")
+			if err == nil {
+				_ = conn.Close()
+
+				// 已经恢复正常
+				this.locker.Lock()
+				state.Config.IsOk = true
+				delete(this.stateMap, state.Config.Id)
+				this.locker.Unlock()
+
+				var reverseProxy = state.ReverseProxy
+				if reverseProxy != nil {
+					reverseProxy.ResetScheduling()
+				}
+			}
+		}(state)
+	}
+	wg.Wait()
+
+	return nil
+}
+
+// Fail 添加失败的源站
+func (this *OriginStateManager) Fail(origin *serverconfigs.OriginConfig, reverseProxy *serverconfigs.ReverseProxyConfig, callback func()) {
+	if origin == nil {
+		return
+	}
+	this.locker.Lock()
+	state, ok := this.stateMap[origin.Id]
+	var timestamp = time.Now().Unix()
+	if ok {
+		if state.UpdatedAt < timestamp-300 { // N 分钟之后重新计数
+			state.CountFails = 0
+			state.Config.IsOk = true
+		}
+
+		state.CountFails++
+		state.Config = origin
+		state.ReverseProxy = reverseProxy
+		state.UpdatedAt = timestamp
+
+		if origin.IsOk {
+			origin.IsOk = state.CountFails > 5 // 超过 N 次之后认为是异常
+
+			if !origin.IsOk {
+				if callback != nil {
+					callback()
+				}
+			}
+		}
+	} else {
+		this.stateMap[origin.Id] = &OriginState{
+			CountFails:   1,
+			Config:       origin,
+			ReverseProxy: reverseProxy,
+			UpdatedAt:    timestamp,
+		}
+		origin.IsOk = true
+	}
+	this.locker.Unlock()
+}
+
+// Success 添加成功的源站
+func (this *OriginStateManager) Success(origin *serverconfigs.OriginConfig, callback func()) {
+	if origin == nil {
+		return
+	}
+	if !origin.IsOk {
+		if callback != nil {
+			callback()
+		}
+	}
+	origin.IsOk = true
+	this.locker.Lock()
+	delete(this.stateMap, origin.Id)
+	this.locker.Unlock()
+}
+
+// IsAvailable 检查是否正常
+func (this *OriginStateManager) IsAvailable(originId int64) bool {
+	this.locker.RLock()
+	_, ok := this.stateMap[originId]
+	this.locker.RUnlock()
+
+	return !ok
+}