// 非法值: ts=0,value无意义
func GetLast(endpoint, counter string) *cmodel.RRDData {
dsType, step, exists := index.GetTypeAndStep(endpoint, counter)
if !exists {
return cmodel.NewRRDData(0, 0.0)
}
if dsType == g.GAUGE {
return GetLastRaw(endpoint, counter)
}
if dsType == g.COUNTER || dsType == g.DERIVE {
md5 := cutils.Md5(endpoint + "/" + counter)
items := store.GetAllItems(md5)
if len(items) < 2 {
return cmodel.NewRRDData(0, 0.0)
}
f0 := items[0]
f1 := items[1]
delta_ts := f0.Timestamp - f1.Timestamp
delta_v := f0.Value - f1.Value
if delta_ts != int64(step) || delta_ts <= 0 {
return cmodel.NewRRDData(0, 0.0)
}
if delta_v < 0 {
// when cnt restarted, new cnt value would be zero, so fix it here
delta_v = 0
}
return cmodel.NewRRDData(f0.Timestamp, delta_v/float64(delta_ts))
}
return cmodel.NewRRDData(0, 0.0)
}
// USED WHEN QUERY
func GetTypeAndStep(endpoint string, counter string) (dsType string, step int, found bool) {
// get it from index cache
pk := cutils.Md5(fmt.Sprintf("%s/%s", endpoint, counter))
if icitem := indexedItemCache.Get(pk); icitem != nil {
if item := icitem.(*IndexCacheItem).Item; item != nil {
dsType = item.DsType
step = item.Step
found = true
return
}
}
// statistics
proc.GraphLoadDbCnt.Incr()
// get it from db, this should rarely happen
var endpointId int64 = -1
if endpointId, found = GetEndpointFromCache(endpoint); found {
if dsType, step, found = GetCounterFromCache(endpointId, counter); found {
//found = true
return
}
}
// do not find it, this must be a bad request
found = false
return
}
func configInfoRoutes() {
// e.g. /strategy/lg-dinp-docker01.bj/cpu.idle
http.HandleFunc("/strategy/", func(w http.ResponseWriter, r *http.Request) {
urlParam := r.URL.Path[len("/strategy/"):]
m := g.StrategyMap.Get()
RenderDataJson(w, m[urlParam])
})
// e.g. /expression/net.port.listen/port=22
http.HandleFunc("/expression/", func(w http.ResponseWriter, r *http.Request) {
urlParam := r.URL.Path[len("/expression/"):]
m := g.ExpressionMap.Get()
RenderDataJson(w, m[urlParam])
})
http.HandleFunc("/count", func(w http.ResponseWriter, r *http.Request) {
sum := 0
arr := []string{"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"}
for i := 0; i < 16; i++ {
for j := 0; j < 16; j++ {
sum += store.HistoryBigMap[arr[i]+arr[j]].Len()
}
}
out := fmt.Sprintf("total: %d\n", sum)
w.Write([]byte(out))
})
http.HandleFunc("/history/", func(w http.ResponseWriter, r *http.Request) {
urlParam := r.URL.Path[len("/history/"):]
pk := utils.Md5(urlParam)
L, exists := store.HistoryBigMap[pk[0:2]].Get(pk)
if !exists || L.Len() == 0 {
w.Write([]byte("not found\n"))
return
}
arr := []string{}
datas, _ := L.HistoryData(g.Config().Remain - 1)
for i := 0; i < len(datas); i++ {
if datas[i] == nil {
continue
}
str := fmt.Sprintf(
"%d %s %v\n",
datas[i].Timestamp,
utils.UnixTsFormat(datas[i].Timestamp),
datas[i].Value,
)
arr = append(arr, str)
}
w.Write([]byte(strings.Join(arr, "")))
})
}
func DigestBuiltinMetrics(items []*model.BuiltinMetric) string {
sort.Sort(model.BuiltinMetricSlice(items))
var buf bytes.Buffer
for _, m := range items {
buf.WriteString(m.String())
}
return utils.Md5(buf.String())
}
func (this *Graph) Last(param cmodel.GraphLastParam, resp *cmodel.GraphLastResp) error {
// statistics
proc.GraphLastCnt.Incr()
resp.Endpoint = param.Endpoint
resp.Counter = param.Counter
md5 := cutils.Md5(param.Endpoint + "/" + param.Counter)
item := store.GetLastItem(md5)
resp.Value = cmodel.NewRRDData(item.Timestamp, item.Value)
return nil
}
func (this *Graph) Info(param cmodel.GraphInfoParam, resp *cmodel.GraphInfoResp) error {
// statistics
proc.GraphInfoCnt.Incr()
dsType, step, exists := index.GetTypeAndStep(param.Endpoint, param.Counter)
if !exists {
return nil
}
md5 := cutils.Md5(param.Endpoint + "/" + param.Counter)
filename := fmt.Sprintf("%s/%s/%s_%s_%d.rrd", g.Config().RRD.Storage, md5[0:2], md5, dsType, step)
resp.ConsolFun = dsType
resp.Step = step
resp.Filename = filename
return nil
}
func (t *Agent) MinePlugins(args model.AgentHeartbeatRequest, reply *model.AgentPluginsResponse) error {
if args.Hostname == "" {
return nil
}
plugins := cache.GetPlugins(args.Hostname)
checksum := ""
if len(plugins) > 0 {
checksum = utils.Md5(strings.Join(plugins, ""))
}
if args.Checksum == checksum {
reply.Plugins = []string{}
} else {
reply.Plugins = plugins
}
reply.Checksum = checksum
reply.Timestamp = time.Now().Unix()
return nil
}
func (this *Graph) Query(param cmodel.GraphQueryParam, resp *cmodel.GraphQueryResponse) error {
// statistics
proc.GraphQueryCnt.Incr()
resp.Values = []*cmodel.RRDData{}
dsType, step, exists := index.GetTypeAndStep(param.Endpoint, param.Counter)
if !exists {
return nil
}
md5 := cutils.Md5(param.Endpoint + "/" + param.Counter)
filename := fmt.Sprintf("%s/%s/%s_%s_%d.rrd", g.Config().RRD.Storage, md5[0:2], md5, dsType, step)
datas, err := rrdtool.Fetch(filename, param.ConsolFun, param.Start, param.End, step)
if err != nil {
if store.GraphItems.LenOf(md5) <= 2 {
return nil
}
// TODO not atomic, fix me
items := store.GraphItems.PopAll(md5)
size := len(items)
if size > 2 {
filename := fmt.Sprintf("%s/%s/%s_%s_%d.rrd", g.Config().RRD.Storage, md5[0:2],
md5, items[0].DsType, items[0].Step)
err := rrdtool.Flush(filename, items)
if err != nil && g.Config().Debug && g.Config().DebugChecksum == md5 {
log.Println("flush fail:", err, "filename:", filename)
}
} else {
return nil
}
}
items := store.GraphItems.FetchAll(md5)
// merge
items_size := len(items)
datas_size := len(datas)
if items_size > 1 && datas_size > 2 &&
int(datas[1].Timestamp-datas[0].Timestamp) == step &&
items[items_size-1].Timestamp > datas[0].Timestamp {
var val cmodel.JsonFloat
cache_size := int(items[items_size-1].Timestamp-items[0].Timestamp)/step + 1
cache := make([]*cmodel.RRDData, cache_size, cache_size)
//fix items
items_idx := 0
ts := items[0].Timestamp
if dsType == g.DERIVE || dsType == g.COUNTER {
for i := 0; i < cache_size; i++ {
if items_idx < items_size-1 &&
ts == items[items_idx].Timestamp &&
ts != items[items_idx+1].Timestamp {
val = cmodel.JsonFloat(items[items_idx+1].Value-items[items_idx].Value) /
cmodel.JsonFloat(items[items_idx+1].Timestamp-items[items_idx].Timestamp)
if val < 0 {
val = cmodel.JsonFloat(math.NaN())
}
items_idx++
} else {
// miss
val = cmodel.JsonFloat(math.NaN())
}
cache[i] = &cmodel.RRDData{
Timestamp: ts,
Value: val,
}
ts = ts + int64(step)
}
} else if dsType == g.GAUGE {
for i := 0; i < cache_size; i++ {
if items_idx < items_size && ts == items[items_idx].Timestamp {
val = cmodel.JsonFloat(items[items_idx].Value)
items_idx++
} else {
// miss
val = cmodel.JsonFloat(math.NaN())
}
cache[i] = &cmodel.RRDData{
Timestamp: ts,
Value: val,
}
ts = ts + int64(step)
}
} else {
log.Println("not support dstype")
return nil
}
size := int(items[items_size-1].Timestamp-datas[0].Timestamp)/step + 1
ret := make([]*cmodel.RRDData, size, size)
cache_idx := 0
ts = datas[0].Timestamp
if g.Config().Debug && g.Config().DebugChecksum == md5 {
log.Println("param.start", param.Start, "param.End:", param.End,
"items:", items, "datas:", datas)
}
for i := 0; i < size; i++ {
if g.Config().Debug && g.Config().DebugChecksum == md5 {
log.Println("i", i, "size:", size, "items_idx:", items_idx, "ts:", ts)
}
if i < datas_size {
if ts == cache[cache_idx].Timestamp {
if math.IsNaN(float64(cache[cache_idx].Value)) {
val = datas[i].Value
} else {
val = cache[cache_idx].Value
}
cache_idx++
} else {
val = datas[i].Value
}
} else {
if cache_idx < cache_size && ts == cache[cache_idx].Timestamp {
val = cache[cache_idx].Value
cache_idx++
} else {
//miss
val = cmodel.JsonFloat(math.NaN())
}
}
ret[i] = &cmodel.RRDData{
Timestamp: ts,
Value: val,
}
ts = ts + int64(step)
}
resp.Values = ret
} else {
resp.Values = datas
}
resp.Endpoint = param.Endpoint
resp.Counter = param.Counter
resp.DsType = dsType
resp.Step = step
// statistics
proc.GraphQueryItemCnt.IncrBy(int64(len(resp.Values)))
return nil
}
func (this *JudgeItem) PrimaryKey() string {
return utils.Md5(utils.PK(this.Endpoint, this.Metric, this.Tags))
}
func (this *Graph) Query(param cmodel.GraphQueryParam, resp *cmodel.GraphQueryResponse) error {
// statistics
proc.GraphQueryCnt.Incr()
// form empty response
resp.Values = []*cmodel.RRDData{}
resp.Endpoint = param.Endpoint
resp.Counter = param.Counter
dsType, step, exists := index.GetTypeAndStep(param.Endpoint, param.Counter) // complete dsType and step
if !exists {
return nil
}
resp.DsType = dsType
resp.Step = step
start_ts := param.Start - param.Start%int64(step)
end_ts := param.End - param.End%int64(step) + int64(step)
if end_ts-start_ts-int64(step) < 1 {
return nil
}
md5 := cutils.Md5(param.Endpoint + "/" + param.Counter)
ckey := g.FormRrdCacheKey(md5, dsType, step)
filename := g.RrdFileName(g.Config().RRD.Storage, md5, dsType, step)
// read data from rrd file
datas, _ := rrdtool.Fetch(filename, param.ConsolFun, start_ts, end_ts, step)
datas_size := len(datas)
// read cached items
items := store.GraphItems.FetchAll(ckey)
items_size := len(items)
nowTs := time.Now().Unix()
lastUpTs := nowTs - nowTs%int64(step)
rra1StartTs := lastUpTs - int64(rrdtool.RRA1PointCnt*step)
// consolidated, do not merge
if start_ts < rra1StartTs {
resp.Values = datas
goto _RETURN_OK
}
// no cached items, do not merge
if items_size < 1 {
resp.Values = datas
goto _RETURN_OK
}
// merge
{
// fmt cached items
var val cmodel.JsonFloat
cache := make([]*cmodel.RRDData, 0)
ts := items[0].Timestamp
itemEndTs := items[items_size-1].Timestamp
itemIdx := 0
if dsType == g.DERIVE || dsType == g.COUNTER {
for ts < itemEndTs {
if itemIdx < items_size-1 && ts == items[itemIdx].Timestamp &&
ts == items[itemIdx+1].Timestamp-int64(step) {
val = cmodel.JsonFloat(items[itemIdx+1].Value-items[itemIdx].Value) / cmodel.JsonFloat(step)
if val < 0 {
val = cmodel.JsonFloat(math.NaN())
}
itemIdx++
} else {
// missing
val = cmodel.JsonFloat(math.NaN())
}
if ts >= start_ts && ts <= end_ts {
cache = append(cache, &cmodel.RRDData{Timestamp: ts, Value: val})
}
ts = ts + int64(step)
}
} else if dsType == g.GAUGE {
for ts <= itemEndTs {
if itemIdx < items_size && ts == items[itemIdx].Timestamp {
val = cmodel.JsonFloat(items[itemIdx].Value)
itemIdx++
} else {
// missing
val = cmodel.JsonFloat(math.NaN())
}
if ts >= start_ts && ts <= end_ts {
cache = append(cache, &cmodel.RRDData{Timestamp: ts, Value: val})
}
ts = ts + int64(step)
}
}
cache_size := len(cache)
// do merging
merged := make([]*cmodel.RRDData, 0)
if datas_size > 0 {
for _, val := range datas {
if val.Timestamp >= start_ts && val.Timestamp <= end_ts {
merged = append(merged, val) //rrdtool返回的数据,时间戳是连续的、不会有跳点的情况
}
}
}
if cache_size > 0 {
rrdDataSize := len(merged)
lastTs := cache[0].Timestamp
// find junction
rrdDataIdx := 0
for rrdDataIdx = rrdDataSize - 1; rrdDataIdx >= 0; rrdDataIdx-- {
if merged[rrdDataIdx].Timestamp < cache[0].Timestamp {
lastTs = merged[rrdDataIdx].Timestamp
break
}
}
// fix missing
for ts := lastTs + int64(step); ts < cache[0].Timestamp; ts += int64(step) {
merged = append(merged, &cmodel.RRDData{Timestamp: ts, Value: cmodel.JsonFloat(math.NaN())})
}
// merge cached items to result
rrdDataIdx += 1
for cacheIdx := 0; cacheIdx < cache_size; cacheIdx++ {
if rrdDataIdx < rrdDataSize {
if !math.IsNaN(float64(cache[cacheIdx].Value)) {
merged[rrdDataIdx] = cache[cacheIdx]
}
} else {
merged = append(merged, cache[cacheIdx])
}
rrdDataIdx++
}
}
mergedSize := len(merged)
// fmt result
ret_size := int((end_ts - start_ts) / int64(step))
ret := make([]*cmodel.RRDData, ret_size, ret_size)
mergedIdx := 0
ts = start_ts
for i := 0; i < ret_size; i++ {
if mergedIdx < mergedSize && ts == merged[mergedIdx].Timestamp {
ret[i] = merged[mergedIdx]
mergedIdx++
} else {
ret[i] = &cmodel.RRDData{Timestamp: ts, Value: cmodel.JsonFloat(math.NaN())}
}
ts += int64(step)
}
resp.Values = ret
}
_RETURN_OK:
// statistics
proc.GraphQueryItemCnt.IncrBy(int64(len(resp.Values)))
return nil
}
// 非法值: ts=0,value无意义
func GetLastRaw(endpoint, counter string) *cmodel.RRDData {
md5 := cutils.Md5(endpoint + "/" + counter)
item := store.GetLastItem(md5)
return cmodel.NewRRDData(item.Timestamp, item.Value)
}
