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rule.go
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rule.go
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package model
import (
"strings"
"time"
"gorm.io/gorm"
)
const (
RuleCoverAll = iota
RuleCoverIgnoreAll
)
type NResult struct {
N uint64
}
type Rule struct {
// 指标类型,cpu、memory、swap、disk、net_in_speed、net_out_speed
// net_all_speed、transfer_in、transfer_out、transfer_all、offline
// transfer_in_cycle、transfer_out_cycle、transfer_all_cycle
Type string `json:"type,omitempty"`
Min float64 `json:"min,omitempty"` // 最小阈值 (百分比、字节 kb ÷ 1024)
Max float64 `json:"max,omitempty"` // 最大阈值 (百分比、字节 kb ÷ 1024)
CycleStart *time.Time `json:"cycle_start,omitempty"` // 流量统计的开始时间
CycleInterval uint64 `json:"cycle_interval,omitempty"` // 流量统计周期
CycleUnit string `json:"cycle_unit,omitempty"` // 流量统计周期单位,默认hour,可选(hour, day, week, month, year)
Duration uint64 `json:"duration,omitempty"` // 持续时间 (秒)
Cover uint64 `json:"cover,omitempty"` // 覆盖范围 RuleCoverAll/IgnoreAll
Ignore map[uint64]bool `json:"ignore,omitempty"` // 覆盖范围的排除
// 只作为缓存使用,记录下次该检测的时间
NextTransferAt map[uint64]time.Time `json:"-"`
LastCycleStatus map[uint64]interface{} `json:"-"`
}
func percentage(used, total uint64) float64 {
if total == 0 {
return 0
}
return float64(used) * 100 / float64(total)
}
// Snapshot 未通过规则返回 struct{}{}, 通过返回 nil
func (u *Rule) Snapshot(cycleTransferStats *CycleTransferStats, server *Server, db *gorm.DB) interface{} {
// 监控全部但是排除了此服务器
if u.Cover == RuleCoverAll && u.Ignore[server.ID] {
return nil
}
// 忽略全部但是指定监控了此服务器
if u.Cover == RuleCoverIgnoreAll && !u.Ignore[server.ID] {
return nil
}
// 循环区间流量检测 · 短期无需重复检测
if u.IsTransferDurationRule() && u.NextTransferAt[server.ID].After(time.Now()) {
return u.LastCycleStatus[server.ID]
}
var src float64
switch u.Type {
case "cpu":
src = float64(server.State.CPU)
case "memory":
src = percentage(server.State.MemUsed, server.Host.MemTotal)
case "swap":
src = percentage(server.State.SwapUsed, server.Host.SwapTotal)
case "disk":
src = percentage(server.State.DiskUsed, server.Host.DiskTotal)
case "net_in_speed":
src = float64(server.State.NetInSpeed)
case "net_out_speed":
src = float64(server.State.NetOutSpeed)
case "net_all_speed":
src = float64(server.State.NetOutSpeed + server.State.NetOutSpeed)
case "transfer_in":
src = float64(server.State.NetInTransfer)
case "transfer_out":
src = float64(server.State.NetOutTransfer)
case "transfer_all":
src = float64(server.State.NetOutTransfer + server.State.NetInTransfer)
case "offline":
if server.LastActive.IsZero() {
src = 0
} else {
src = float64(server.LastActive.Unix())
}
case "transfer_in_cycle":
src = float64(server.State.NetInTransfer - uint64(server.PrevHourlyTransferIn))
if u.CycleInterval != 0 {
var res NResult
db.Model(&Transfer{}).Select("SUM(`in`) AS n").Where("created_at > ? AND server_id = ?", u.GetTransferDurationStart(), server.ID).Scan(&res)
src += float64(res.N)
}
case "transfer_out_cycle":
src = float64(server.State.NetOutTransfer - uint64(server.PrevHourlyTransferOut))
if u.CycleInterval != 0 {
var res NResult
db.Model(&Transfer{}).Select("SUM(`out`) AS n").Where("created_at > ? AND server_id = ?", u.GetTransferDurationStart(), server.ID).Scan(&res)
src += float64(res.N)
}
case "transfer_all_cycle":
src = float64(server.State.NetOutTransfer - uint64(server.PrevHourlyTransferOut) + server.State.NetInTransfer - uint64(server.PrevHourlyTransferIn))
if u.CycleInterval != 0 {
var res NResult
db.Model(&Transfer{}).Select("SUM(`in`+`out`) AS n").Where("created_at > ? AND server_id = ?", u.GetTransferDurationStart(), server.ID).Scan(&res)
src += float64(res.N)
}
case "load1":
src = server.State.Load1
case "load5":
src = server.State.Load5
case "load15":
src = server.State.Load15
case "tcp_conn_count":
src = float64(server.State.TcpConnCount)
case "udp_conn_count":
src = float64(server.State.UdpConnCount)
case "process_count":
src = float64(server.State.ProcessCount)
}
// 循环区间流量检测 · 更新下次需要检测时间
if u.IsTransferDurationRule() {
seconds := 1800 * ((u.Max - src) / u.Max)
if seconds < 180 {
seconds = 180
}
if u.NextTransferAt == nil {
u.NextTransferAt = make(map[uint64]time.Time)
}
if u.LastCycleStatus == nil {
u.LastCycleStatus = make(map[uint64]interface{})
}
u.NextTransferAt[server.ID] = time.Now().Add(time.Second * time.Duration(seconds))
if (u.Max > 0 && src > u.Max) || (u.Min > 0 && src < u.Min) {
u.LastCycleStatus[server.ID] = struct{}{}
} else {
u.LastCycleStatus[server.ID] = nil
}
if cycleTransferStats.ServerName[server.ID] != server.Name {
cycleTransferStats.ServerName[server.ID] = server.Name
}
cycleTransferStats.Transfer[server.ID] = uint64(src)
cycleTransferStats.NextUpdate[server.ID] = u.NextTransferAt[server.ID]
// 自动更新周期流量展示起止时间
cycleTransferStats.From = u.GetTransferDurationStart()
cycleTransferStats.To = u.GetTransferDurationEnd()
}
if u.Type == "offline" && float64(time.Now().Unix())-src > 6 {
return struct{}{}
} else if (u.Max > 0 && src > u.Max) || (u.Min > 0 && src < u.Min) {
return struct{}{}
}
return nil
}
// IsTransferDurationRule 判断该规则是否属于周期流量规则 属于则返回true
func (rule Rule) IsTransferDurationRule() bool {
return strings.HasSuffix(rule.Type, "_cycle")
}
// GetTransferDurationStart 获取周期流量的起始时间
func (rule Rule) GetTransferDurationStart() time.Time {
// Accept uppercase and lowercase
unit := strings.ToLower(rule.CycleUnit)
startTime := *rule.CycleStart
var nextTime time.Time
switch unit {
case "year":
nextTime = startTime.AddDate(int(rule.CycleInterval), 0, 0)
for time.Now().After(nextTime) {
startTime = nextTime
nextTime = nextTime.AddDate(int(rule.CycleInterval), 0, 0)
}
case "month":
nextTime = startTime.AddDate(0, int(rule.CycleInterval), 0)
for time.Now().After(nextTime) {
startTime = nextTime
nextTime = nextTime.AddDate(0, int(rule.CycleInterval), 0)
}
case "week":
nextTime = startTime.AddDate(0, 0, 7*int(rule.CycleInterval))
for time.Now().After(nextTime) {
startTime = nextTime
nextTime = nextTime.AddDate(0, 0, 7*int(rule.CycleInterval))
}
case "day":
nextTime = startTime.AddDate(0, 0, int(rule.CycleInterval))
for time.Now().After(nextTime) {
startTime = nextTime
nextTime = nextTime.AddDate(0, 0, int(rule.CycleInterval))
}
default:
// For hour unit or not set.
interval := 3600 * int64(rule.CycleInterval)
startTime = time.Unix(rule.CycleStart.Unix()+(time.Now().Unix()-rule.CycleStart.Unix())/interval*interval, 0)
}
return startTime
}
// GetTransferDurationEnd 获取周期流量结束时间
func (rule Rule) GetTransferDurationEnd() time.Time {
// Accept uppercase and lowercase
unit := strings.ToLower(rule.CycleUnit)
startTime := *rule.CycleStart
var nextTime time.Time
switch unit {
case "year":
nextTime = startTime.AddDate(int(rule.CycleInterval), 0, 0)
for time.Now().After(nextTime) {
startTime = nextTime
nextTime = nextTime.AddDate(int(rule.CycleInterval), 0, 0)
}
case "month":
nextTime = startTime.AddDate(0, int(rule.CycleInterval), 0)
for time.Now().After(nextTime) {
startTime = nextTime
nextTime = nextTime.AddDate(0, int(rule.CycleInterval), 0)
}
case "week":
nextTime = startTime.AddDate(0, 0, 7*int(rule.CycleInterval))
for time.Now().After(nextTime) {
startTime = nextTime
nextTime = nextTime.AddDate(0, 0, 7*int(rule.CycleInterval))
}
case "day":
nextTime = startTime.AddDate(0, 0, int(rule.CycleInterval))
for time.Now().After(nextTime) {
startTime = nextTime
nextTime = nextTime.AddDate(0, 0, int(rule.CycleInterval))
}
default:
// For hour unit or not set.
interval := 3600 * int64(rule.CycleInterval)
startTime = time.Unix(rule.CycleStart.Unix()+(time.Now().Unix()-rule.CycleStart.Unix())/interval*interval, 0)
nextTime = time.Unix(startTime.Unix()+interval, 0)
}
return nextTime
}