func fetch(filename string, cf string, start, end int64, step int) ([]*cmodel.RRDData, error) {
start_t := time.Unix(start, 0)
end_t := time.Unix(end, 0)
step_t := time.Duration(step) * time.Second
fetchRes, err := rrdlite.Fetch(filename, cf, start_t, end_t, step_t)
if err != nil {
return []*cmodel.RRDData{}, err
}
defer fetchRes.FreeValues()
values := fetchRes.Values()
size := len(values)
ret := make([]*cmodel.RRDData, size)
start_ts := fetchRes.Start.Unix()
step_s := fetchRes.Step.Seconds()
for i, val := range values {
ts := start_ts + int64(i+1)*int64(step_s)
d := &cmodel.RRDData{
Timestamp: ts,
Value: cmodel.JsonFloat(val),
}
ret[i] = d
}
return ret, nil
}
func makeOneFakeResult(body GraphHistoryParam) *cmodel.GraphQueryResponse {
for _, ec := range body.EndpointCounters {
if !strings.Contains(ec.Counter, "packet-loss-rate") && !strings.Contains(ec.Counter, "average") {
fakeResult := graphQueryOne(ec, body, "", "")
for i := range fakeResult.Values {
fakeResult.Values[i].Value = cmodel.JsonFloat(0.0)
}
return fakeResult
}
}
return nil
}
func nqmData(body GraphHistoryParam, nqmDataCounter string, rawDataCounter string) []*cmodel.GraphQueryResponse {
result := makeOneFakeResult(body)
if result == nil {
return nil
}
data := []*cmodel.GraphQueryResponse{}
packetSentCount := make([]cmodel.JsonFloat, len(result.Values))
for i := range result.Values {
packetSentCount[i] = cmodel.JsonFloat(0.0)
}
for _, ec := range body.EndpointCounters {
if !strings.Contains(ec.Counter, rawDataCounter) {
continue
}
resultRaw := graphQueryOne(ec, body, "", "")
if resultRaw == nil {
continue
}
data = append(data, resultRaw)
if rawDataCounter == "packets-sent" {
counter := strings.Replace(ec.Counter, "packets-sent", "packets-received", 1)
if resultAdditional := graphQueryOne(ec, body, "", counter); resultAdditional != nil {
data = append(data, resultAdditional)
for i := range resultRaw.Values {
packetLossCount := (resultRaw.Values[i].Value - resultAdditional.Values[i].Value)
result.Values[i].Value += packetLossCount
packetSentCount[i] += resultRaw.Values[i].Value
}
}
} else if rawDataCounter == "transmission-time" {
counter := strings.Replace(ec.Counter, "transmission-time", "packets-sent", 1)
if resultAdditional := graphQueryOne(ec, body, "", counter); resultAdditional != nil {
data = append(data, resultAdditional)
for i := range resultAdditional.Values {
result.Values[i].Value += resultAdditional.Values[i].Value * resultRaw.Values[i].Value
packetSentCount[i] += resultAdditional.Values[i].Value
}
}
}
}
for i := range result.Values {
result.Values[i].Value = result.Values[i].Value / packetSentCount[i]
}
result.Endpoint = "all-endpoints"
result.Counter = nqmDataCounter
data = append(data, result)
return data
}
func QueryOne(para cmodel.GraphQueryParam) (resp *cmodel.GraphQueryResponse, err error) {
start, end := para.Start, para.End
endpoint, counter := para.Endpoint, para.Counter
pool, addr, err := selectPool(endpoint, counter)
if err != nil {
return nil, err
}
conn, err := pool.Fetch()
if err != nil {
return nil, err
}
rpcConn := conn.(spool.RpcClient)
if rpcConn.Closed() {
pool.ForceClose(conn)
return nil, errors.New("conn closed")
}
type ChResult struct {
Err error
Resp *cmodel.GraphQueryResponse
}
ch := make(chan *ChResult, 1)
go func() {
resp := &cmodel.GraphQueryResponse{}
err := rpcConn.Call("Graph.Query", para, resp)
ch <- &ChResult{Err: err, Resp: resp}
}()
select {
case <-time.After(time.Duration(g.Config().Graph.CallTimeout) * time.Millisecond):
pool.ForceClose(conn)
return nil, fmt.Errorf("%s, call timeout. proc: %s", addr, pool.Proc())
case r := <-ch:
if r.Err != nil {
pool.ForceClose(conn)
return r.Resp, fmt.Errorf("%s, call failed, err %v. proc: %s", addr, r.Err, pool.Proc())
} else {
pool.Release(conn)
if len(r.Resp.Values) < 1 {
r.Resp.Values = []*cmodel.RRDData{}
return r.Resp, nil
}
// TODO query不该做这些事情, 说明graph没做好
fixed := []*cmodel.RRDData{}
for _, v := range r.Resp.Values {
if v == nil || !(v.Timestamp >= start && v.Timestamp <= end) {
continue
}
//FIXME: 查询数据的时候，把所有的负值都过滤掉，因为transfer之前在设置最小值的时候为U
if (r.Resp.DsType == "DERIVE" || r.Resp.DsType == "COUNTER") && v.Value < 0 {
fixed = append(fixed, &cmodel.RRDData{Timestamp: v.Timestamp, Value: cmodel.JsonFloat(math.NaN())})
} else {
fixed = append(fixed, v)
}
}
r.Resp.Values = fixed
}
return r.Resp, nil
}
}
func (this *Graph) Query(param cmodel.GraphQueryParam, resp *cmodel.GraphQueryResponse) error {
var (
datas []*cmodel.RRDData
datas_size int
)
// statistics
proc.GraphQueryCnt.Incr()
cfg := g.Config()
// 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
qstep := step
if param.Step != 0 {
qstep = param.Step
}
if !exists {
return nil
}
resp.DsType = dsType
resp.Step = qstep
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)
key := g.FormRrdCacheKey(md5, dsType, step)
filename := g.RrdFileName(cfg.RRD.Storage, md5, dsType, step)
// read cached items
items, flag := store.GraphItems.FetchAll(key)
items_size := len(items)
if cfg.Migrate.Enabled && flag&g.GRAPH_F_MISS != 0 {
node, _ := rrdtool.Consistent.Get(param.Endpoint + "/" + param.Counter)
done := make(chan error, 1)
res := &cmodel.GraphAccurateQueryResponse{}
rrdtool.Net_task_ch[node] <- &rrdtool.Net_task_t{
Method: rrdtool.NET_TASK_M_QUERY,
Done: done,
Args: param,
Reply: res,
}
<-done
// fetch data from remote
datas = res.Values
datas_size = len(datas)
} else {
// read data from rrd file
datas, _ = rrdtool.Fetch(filename, param.ConsolFun, start_ts, end_ts, qstep)
datas_size = len(datas)
}
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
}