mirror of
https://github.com/nezhahq/nezha.git
synced 2025-01-22 20:58:14 -05:00
414 lines
15 KiB
Go
414 lines
15 KiB
Go
package singleton
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import (
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"fmt"
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"log"
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"sort"
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"strings"
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"sync"
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"time"
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"github.com/naiba/nezha/model"
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pb "github.com/naiba/nezha/proto"
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)
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const (
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_CurrentStatusSize = 30 // 统计 15 分钟内的数据为当前状态
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_StatusOk = "良好"
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)
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var ServiceSentinelShared *ServiceSentinel
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type ReportData struct {
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Data *pb.TaskResult
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Reporter uint64
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}
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// _TodayStatsOfMonitor 今日监控记录
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type _TodayStatsOfMonitor struct {
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Up int // 今日在线计数
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Down int // 今日离线计数
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Delay float32 // 今日平均延迟
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}
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// NewServiceSentinel 创建服务监控器
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func NewServiceSentinel(serviceSentinelDispatchBus chan<- model.Monitor) {
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ServiceSentinelShared = &ServiceSentinel{
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serviceReportChannel: make(chan ReportData, 200),
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serviceStatusToday: make(map[uint64]*_TodayStatsOfMonitor),
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serviceCurrentStatusIndex: make(map[uint64]int),
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serviceCurrentStatusData: make(map[uint64][]model.MonitorHistory),
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latestDate: make(map[uint64]string),
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lastStatus: make(map[uint64]string),
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serviceResponseDataStoreCurrentUp: make(map[uint64]uint64),
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serviceResponseDataStoreCurrentDown: make(map[uint64]uint64),
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monitors: make(map[uint64]*model.Monitor),
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sslCertCache: make(map[uint64]string),
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// 30天数据缓存
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monthlyStatus: make(map[uint64]*model.ServiceItemResponse),
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dispatchBus: serviceSentinelDispatchBus,
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}
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// 加载历史记录
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ServiceSentinelShared.loadMonitorHistory()
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year, month, day := time.Now().Date()
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today := time.Date(year, month, day, 0, 0, 0, 0, time.Local)
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var mhs []model.MonitorHistory
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// 加载当日记录
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DB.Where("created_at >= ?", today).Find(&mhs)
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totalDelay := make(map[uint64]float32)
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for i := 0; i < len(mhs); i++ {
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if mhs[i].Successful {
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ServiceSentinelShared.serviceStatusToday[mhs[i].MonitorID].Up++
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totalDelay[mhs[i].MonitorID] += mhs[i].Delay
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} else {
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ServiceSentinelShared.serviceStatusToday[mhs[i].MonitorID].Down++
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}
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}
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for id, delay := range totalDelay {
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ServiceSentinelShared.serviceStatusToday[id].Delay = delay / float32(ServiceSentinelShared.serviceStatusToday[id].Up)
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}
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// 更新入库时间及当日数据入库游标
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for k := range ServiceSentinelShared.monitors {
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ServiceSentinelShared.latestDate[k] = time.Now().Format("02-Jan-06")
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}
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// 启动服务监控器
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go ServiceSentinelShared.worker()
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// 每日将游标往后推一天
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_, err := Cron.AddFunc("0 0 0 * * *", ServiceSentinelShared.refreshMonthlyServiceStatus)
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if err != nil {
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panic(err)
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}
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}
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/*
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使用缓存 channel，处理上报的 Service 请求结果，然后判断是否需要报警
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需要记录上一次的状态信息
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*/
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type ServiceSentinel struct {
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serviceResponseDataStoreLock sync.RWMutex
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monitorsLock sync.RWMutex
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serviceReportChannel chan ReportData // 服务状态汇报管道
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serviceStatusToday map[uint64]*_TodayStatsOfMonitor // [monitor_id] -> _TodayStatsOfMonitor
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serviceCurrentStatusIndex map[uint64]int // [monitor_id] -> 该监控ID对应的 serviceCurrentStatusData 的最新索引下标
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serviceCurrentStatusData map[uint64][]model.MonitorHistory // [monitor_id] -> []model.MonitorHistory
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latestDate map[uint64]string // 最近一次更新时间
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lastStatus map[uint64]string
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serviceResponseDataStoreCurrentUp map[uint64]uint64 // [monitor_id] -> 当前服务在线计数
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serviceResponseDataStoreCurrentDown map[uint64]uint64 // [monitor_id] -> 当前服务离线计数
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monitors map[uint64]*model.Monitor // [monitor_id] -> model.Monitor
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sslCertCache map[uint64]string
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// 30天数据缓存
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monthlyStatusLock sync.Mutex
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monthlyStatus map[uint64]*model.ServiceItemResponse // [monitor_id] -> model.ServiceItemResponse
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// 服务监控任务调度管道
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dispatchBus chan<- model.Monitor
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}
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func (ss *ServiceSentinel) refreshMonthlyServiceStatus() {
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// 刷新数据防止无人访问
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ss.LoadStats()
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// 将数据往前刷一天
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ss.monthlyStatusLock.Lock()
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defer ss.monthlyStatusLock.Unlock()
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for _, v := range ss.monthlyStatus {
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for i := 0; i < len(v.Up)-1; i++ {
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v.Up[i] = v.Up[i+1]
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v.Down[i] = v.Down[i+1]
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v.Delay[i] = v.Delay[i+1]
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}
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}
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}
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// Dispatch 将传入的 ReportData 传给 服务状态汇报管道
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func (ss *ServiceSentinel) Dispatch(r ReportData) {
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ss.serviceReportChannel <- r
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}
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func (ss *ServiceSentinel) Monitors() []*model.Monitor {
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ss.monitorsLock.RLock()
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defer ss.monitorsLock.RUnlock()
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var monitors []*model.Monitor
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for _, v := range ss.monitors {
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monitors = append(monitors, v)
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}
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sort.SliceStable(monitors, func(i, j int) bool {
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return monitors[i].ID < monitors[j].ID
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})
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return monitors
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}
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// LoadStats 加载服务监控器的历史状态信息
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func (ss *ServiceSentinel) loadMonitorHistory() {
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var monitors []*model.Monitor
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DB.Find(&monitors)
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var err error
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ss.monitorsLock.Lock()
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defer ss.monitorsLock.Unlock()
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for i := 0; i < len(monitors); i++ {
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// 旧版本可能不存在通知组 为其设置默认组
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if monitors[i].NotificationTag == "" {
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monitors[i].NotificationTag = "default"
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DB.Save(monitors[i])
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}
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task := *monitors[i]
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// 通过cron定时将服务监控任务传递给任务调度管道
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monitors[i].CronJobID, err = Cron.AddFunc(task.CronSpec(), func() {
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ss.dispatchBus <- task
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})
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if err != nil {
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panic(err)
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}
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ss.monitors[monitors[i].ID] = monitors[i]
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ss.serviceCurrentStatusData[monitors[i].ID] = make([]model.MonitorHistory, _CurrentStatusSize)
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ss.serviceStatusToday[monitors[i].ID] = &_TodayStatsOfMonitor{}
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}
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year, month, day := time.Now().Date()
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today := time.Date(year, month, day, 0, 0, 0, 0, time.Local)
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ss.monthlyStatusLock.Lock()
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defer ss.monthlyStatusLock.Unlock()
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for i := 0; i < len(monitors); i++ {
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ServiceSentinelShared.monthlyStatus[monitors[i].ID] = &model.ServiceItemResponse{
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Monitor: monitors[i],
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Delay: &[30]float32{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
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Up: &[30]int{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
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Down: &[30]int{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
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}
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}
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// 加载服务监控历史记录
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var mhs []model.MonitorHistory
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DB.Where("created_at >= ? AND created_at < ?", today.AddDate(0, 0, -29), today).Find(&mhs)
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for i := 0; i < len(mhs); i++ {
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dayIndex := 28 - (int(today.Sub(mhs[i].CreatedAt).Hours()) / 24)
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if mhs[i].Successful {
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ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].TotalUp++
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ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].Delay[dayIndex] = (ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].Delay[dayIndex]*float32(ss.monthlyStatus[mhs[i].MonitorID].Up[dayIndex]) + mhs[i].Delay) / float32(ss.monthlyStatus[mhs[i].MonitorID].Up[dayIndex]+1)
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ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].Up[dayIndex]++
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} else {
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ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].TotalDown++
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ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].Down[dayIndex]++
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}
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}
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}
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func (ss *ServiceSentinel) OnMonitorUpdate(m model.Monitor) error {
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ss.monitorsLock.Lock()
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defer ss.monitorsLock.Unlock()
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var err error
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// 写入新任务
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m.CronJobID, err = Cron.AddFunc(m.CronSpec(), func() {
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ss.dispatchBus <- m
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})
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if err != nil {
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return err
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}
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if ss.monitors[m.ID] != nil {
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// 停掉旧任务
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Cron.Remove(ss.monitors[m.ID].CronJobID)
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} else {
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// 新任务初始化数据
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ss.monthlyStatusLock.Lock()
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defer ss.monthlyStatusLock.Unlock()
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ss.monthlyStatus[m.ID] = &model.ServiceItemResponse{
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Monitor: &m,
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Delay: &[30]float32{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
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Up: &[30]int{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
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Down: &[30]int{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
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}
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ss.serviceResponseDataStoreLock.Lock()
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defer ss.serviceResponseDataStoreLock.Unlock()
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ss.serviceCurrentStatusData[m.ID] = make([]model.MonitorHistory, _CurrentStatusSize)
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ss.serviceStatusToday[m.ID] = &_TodayStatsOfMonitor{}
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}
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// 更新这个任务
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ss.monitors[m.ID] = &m
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return nil
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}
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func (ss *ServiceSentinel) OnMonitorDelete(id uint64) {
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ss.serviceResponseDataStoreLock.Lock()
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defer ss.serviceResponseDataStoreLock.Unlock()
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delete(ss.serviceCurrentStatusIndex, id)
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delete(ss.serviceCurrentStatusData, id)
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delete(ss.latestDate, id)
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delete(ss.lastStatus, id)
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delete(ss.serviceResponseDataStoreCurrentUp, id)
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delete(ss.serviceResponseDataStoreCurrentDown, id)
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delete(ss.sslCertCache, id)
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ss.monitorsLock.Lock()
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defer ss.monitorsLock.Unlock()
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// 停掉定时任务
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Cron.Remove(ss.monitors[id].CronJobID)
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delete(ss.monitors, id)
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ss.monthlyStatusLock.Lock()
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defer ss.monthlyStatusLock.Unlock()
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delete(ss.monthlyStatus, id)
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}
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func (ss *ServiceSentinel) LoadStats() map[uint64]*model.ServiceItemResponse {
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// 刷新最新一天的数据
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ss.serviceResponseDataStoreLock.RLock()
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defer ss.serviceResponseDataStoreLock.RUnlock()
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ss.monthlyStatusLock.Lock()
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defer ss.monthlyStatusLock.Unlock()
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for k := range ss.monitors {
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ss.monthlyStatus[k].Monitor = ss.monitors[k]
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v := ss.serviceStatusToday[k]
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ss.monthlyStatus[k].Up[29] = v.Up
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ss.monthlyStatus[k].Down[29] = v.Down
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ss.monthlyStatus[k].TotalUp += uint64(v.Up)
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ss.monthlyStatus[k].TotalDown += uint64(v.Down)
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ss.monthlyStatus[k].Delay[29] = v.Delay
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}
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// 最后 5 分钟的状态 与 monitor 对象填充
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for k, v := range ss.serviceResponseDataStoreCurrentDown {
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ss.monthlyStatus[k].CurrentDown = v
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}
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for k, v := range ss.serviceResponseDataStoreCurrentUp {
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ss.monthlyStatus[k].CurrentUp = v
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}
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return ss.monthlyStatus
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}
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// getStateStr 根据服务在线率返回对应的状态字符串
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func getStateStr(percent uint64) string {
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if percent == 0 {
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return "无数据"
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}
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if percent > 95 {
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return _StatusOk
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}
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if percent > 80 {
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return "低可用"
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}
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return "故障"
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}
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// worker 服务监控的实际工作流程
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func (ss *ServiceSentinel) worker() {
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// 从服务状态汇报管道获取汇报的服务数据
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for r := range ss.serviceReportChannel {
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if ss.monitors[r.Data.GetId()] == nil || ss.monitors[r.Data.GetId()].ID == 0 {
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log.Printf("NEZAH>> 错误的服务监控上报 %+v", r)
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continue
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}
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mh := model.PB2MonitorHistory(r.Data)
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ss.serviceResponseDataStoreLock.Lock()
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// 先查看是否到下一天
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nowDate := time.Now().Format("02-Jan-06")
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if nowDate != ss.latestDate[mh.MonitorID] {
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// 清理前一天数据
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ss.latestDate[mh.MonitorID] = nowDate
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ss.serviceResponseDataStoreCurrentUp[mh.MonitorID] = 0
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ss.serviceResponseDataStoreCurrentDown[mh.MonitorID] = 0
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ss.serviceStatusToday[mh.MonitorID].Delay = 0
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ss.serviceStatusToday[mh.MonitorID].Up = 0
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ss.serviceStatusToday[mh.MonitorID].Down = 0
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}
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// 写入当天状态
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if mh.Successful {
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ss.serviceStatusToday[mh.MonitorID].Delay = (ss.serviceStatusToday[mh.
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MonitorID].Delay*float32(ss.serviceStatusToday[mh.MonitorID].Up) +
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mh.Delay) / float32(ss.serviceStatusToday[mh.MonitorID].Up+1)
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ss.serviceStatusToday[mh.MonitorID].Up++
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} else {
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ss.serviceStatusToday[mh.MonitorID].Down++
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ServerLock.RLock()
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log.Println("NEZHA>> 服务故障上报：", ss.monitors[mh.MonitorID].Target, "上报者：", ServerList[r.Reporter].Name, "错误信息：", mh.Data)
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ServerLock.RUnlock()
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}
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// 写入当前数据
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ss.serviceCurrentStatusData[mh.MonitorID][ss.serviceCurrentStatusIndex[mh.MonitorID]] = mh
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ss.serviceCurrentStatusIndex[mh.MonitorID]++
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// 更新当前状态
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ss.serviceResponseDataStoreCurrentUp[mh.MonitorID] = 0
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ss.serviceResponseDataStoreCurrentDown[mh.MonitorID] = 0
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for i := 0; i < len(ss.serviceCurrentStatusData[mh.MonitorID]); i++ {
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if ss.serviceCurrentStatusData[mh.MonitorID][i].MonitorID > 0 {
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if ss.serviceCurrentStatusData[mh.MonitorID][i].Successful {
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ss.serviceResponseDataStoreCurrentUp[mh.MonitorID]++
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} else {
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ss.serviceResponseDataStoreCurrentDown[mh.MonitorID]++
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}
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}
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}
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var upPercent uint64 = 0
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if ss.serviceResponseDataStoreCurrentDown[mh.MonitorID]+ss.serviceResponseDataStoreCurrentUp[mh.MonitorID] > 0 {
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upPercent = ss.serviceResponseDataStoreCurrentUp[mh.MonitorID] * 100 / (ss.serviceResponseDataStoreCurrentDown[mh.MonitorID] + ss.serviceResponseDataStoreCurrentUp[mh.MonitorID])
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}
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stateStr := getStateStr(upPercent)
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// 数据持久化
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if ss.serviceCurrentStatusIndex[mh.MonitorID] == _CurrentStatusSize {
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ss.serviceCurrentStatusIndex[mh.MonitorID] = 0
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if err := DB.Create(&model.MonitorHistory{
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MonitorID: mh.MonitorID,
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Delay: ss.serviceStatusToday[mh.MonitorID].Delay,
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Successful: stateStr == _StatusOk,
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Data: mh.Data,
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}).Error; err != nil {
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log.Println("NEZHA>> 服务监控数据持久化失败：", err)
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}
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}
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if stateStr == "故障" || stateStr != ss.lastStatus[mh.MonitorID] {
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ss.monitorsLock.RLock()
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isNeedSendNotification := (ss.lastStatus[mh.MonitorID] != "" || stateStr == "故障") && ss.monitors[mh.MonitorID].Notify
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ss.lastStatus[mh.MonitorID] = stateStr
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if isNeedSendNotification {
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go SendNotification(ss.monitors[mh.MonitorID].NotificationTag, fmt.Sprintf("[服务%s] %s", stateStr, ss.monitors[mh.MonitorID].Name), true)
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}
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ss.monitorsLock.RUnlock()
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}
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ss.serviceResponseDataStoreLock.Unlock()
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// SSL 证书报警
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var errMsg string
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if strings.HasPrefix(mh.Data, "SSL证书错误：") {
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// 排除 i/o timeout、connection timeout、EOF 错误
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if !strings.HasSuffix(mh.Data, "timeout") &&
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!strings.HasSuffix(mh.Data, "EOF") &&
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!strings.HasSuffix(mh.Data, "timed out") {
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errMsg = mh.Data
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}
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} else {
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var newCert = strings.Split(mh.Data, "|")
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if len(newCert) > 1 {
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if ss.sslCertCache[mh.MonitorID] == "" {
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ss.sslCertCache[mh.MonitorID] = mh.Data
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}
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expiresNew, _ := time.Parse("2006-01-02 15:04:05 -0700 MST", newCert[1])
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// 证书过期提醒
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if expiresNew.Before(time.Now().AddDate(0, 0, 7)) {
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errMsg = fmt.Sprintf(
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"SSL证书将在七天内过期，过期时间：%s。",
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expiresNew.Format("2006-01-02 15:04:05"))
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}
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// 证书变更提醒
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var oldCert = strings.Split(ss.sslCertCache[mh.MonitorID], "|")
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var expiresOld time.Time
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if len(oldCert) > 1 {
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expiresOld, _ = time.Parse("2006-01-02 15:04:05 -0700 MST", oldCert[1])
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}
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if oldCert[0] != newCert[0] && !expiresNew.Equal(expiresOld) {
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ss.sslCertCache[mh.MonitorID] = mh.Data
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errMsg = fmt.Sprintf(
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"SSL证书变更，旧：%s, %s 过期；新：%s, %s 过期。",
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oldCert[0], expiresOld.Format("2006-01-02 15:04:05"), newCert[0], expiresNew.Format("2006-01-02 15:04:05"))
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}
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}
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}
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if errMsg != "" {
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ss.monitorsLock.RLock()
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if ss.monitors[mh.MonitorID].Notify {
|
||
go SendNotification(ss.monitors[mh.MonitorID].NotificationTag, fmt.Sprintf("[SSL] %s %s", ss.monitors[mh.MonitorID].Name, errMsg), true)
|
||
}
|
||
ss.monitorsLock.RUnlock()
|
||
}
|
||
}
|
||
}
|