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query.go
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query.go
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package backend
import (
"encoding/json"
"errors"
"fmt"
"math/rand"
"strings"
"time"
"github.com/didi/nightingale/src/dataobj"
"github.com/didi/nightingale/src/modules/transfer/calc"
"github.com/didi/nightingale/src/toolkits/address"
"github.com/didi/nightingale/src/toolkits/pools"
"github.com/didi/nightingale/src/toolkits/stats"
"github.com/toolkits/pkg/logger"
"github.com/toolkits/pkg/net/httplib"
"github.com/toolkits/pkg/pool"
)
func FetchData(inputs []dataobj.QueryData) []*dataobj.TsdbQueryResponse {
workerNum := 100
worker := make(chan struct{}, workerNum) // 控制 goroutine 并发数
dataChan := make(chan *dataobj.TsdbQueryResponse, 20000)
done := make(chan struct{}, 1)
resp := make([]*dataobj.TsdbQueryResponse, 0)
go func() {
defer func() { done <- struct{}{} }()
for d := range dataChan {
resp = append(resp, d)
}
}()
for _, input := range inputs {
for _, endpoint := range input.Endpoints {
for _, counter := range input.Counters {
worker <- struct{}{}
go fetchDataSync(input.Start, input.End, input.ConsolFunc, endpoint, counter, input.Step, worker, dataChan)
}
}
}
// 等待所有 goroutine 执行完成
for i := 0; i < workerNum; i++ {
worker <- struct{}{}
}
close(dataChan)
// 等待所有 dataChan 被消费完
<-done
return resp
}
func FetchDataForUI(input dataobj.QueryDataForUI) []*dataobj.TsdbQueryResponse {
workerNum := 100
worker := make(chan struct{}, workerNum) // 控制 goroutine 并发数
dataChan := make(chan *dataobj.TsdbQueryResponse, 20000)
done := make(chan struct{}, 1)
resp := make([]*dataobj.TsdbQueryResponse, 0)
go func() {
defer func() { done <- struct{}{} }()
for d := range dataChan {
resp = append(resp, d)
}
}()
for _, endpoint := range input.Endpoints {
if len(input.Tags) == 0 {
counter, err := GetCounter(input.Metric, "", nil)
if err != nil {
logger.Warningf("get counter error: %+v", err)
continue
}
worker <- struct{}{}
go fetchDataSync(input.Start, input.End, input.ConsolFunc, endpoint, counter, input.Step, worker, dataChan)
} else {
for _, tag := range input.Tags {
counter, err := GetCounter(input.Metric, tag, nil)
if err != nil {
logger.Warningf("get counter error: %+v", err)
continue
}
worker <- struct{}{}
go fetchDataSync(input.Start, input.End, input.ConsolFunc, endpoint, counter, input.Step, worker, dataChan)
}
}
}
// 等待所有 goroutine 执行完成
for i := 0; i < workerNum; i++ {
worker <- struct{}{}
}
close(dataChan)
<-done
//进行数据计算
aggrDatas := make([]*dataobj.TsdbQueryResponse, 0)
if input.AggrFunc != "" && len(resp) > 1 {
aggrCounter := make(map[string][]*dataobj.TsdbQueryResponse)
// 没有聚合 tag, 或者曲线没有其他 tags, 直接所有曲线进行计算
if len(input.GroupKey) == 0 || getTags(resp[0].Counter) == "" {
aggrData := &dataobj.TsdbQueryResponse{
Start: input.Start,
End: input.End,
Values: calc.Compute(input.AggrFunc, resp),
}
aggrDatas = append(aggrDatas, aggrData)
} else {
for _, data := range resp {
counterMap := make(map[string]string)
tagsMap, err := dataobj.SplitTagsString(getTags(data.Counter))
if err != nil {
logger.Warningf("split tag string error: %+v", err)
continue
}
tagsMap["endpoint"] = data.Endpoint
// 校验 GroupKey 是否在 tags 中
for _, key := range input.GroupKey {
if value, exists := tagsMap[key]; exists {
counterMap[key] = value
}
}
counter := dataobj.SortedTags(counterMap)
if _, exists := aggrCounter[counter]; exists {
aggrCounter[counter] = append(aggrCounter[counter], data)
} else {
aggrCounter[counter] = []*dataobj.TsdbQueryResponse{data}
}
}
// 有需要聚合的 tag 需要将 counter 带上
for counter, datas := range aggrCounter {
aggrData := &dataobj.TsdbQueryResponse{
Start: input.Start,
End: input.End,
Counter: counter,
Values: calc.Compute(input.AggrFunc, datas),
}
aggrDatas = append(aggrDatas, aggrData)
}
}
return aggrDatas
}
return resp
}
func GetCounter(metric, tag string, tagMap map[string]string) (counter string, err error) {
if tagMap == nil {
tagMap, err = dataobj.SplitTagsString(tag)
if err != nil {
logger.Warningf("split tag string error: %+v", err)
return
}
}
tagStr := dataobj.SortedTags(tagMap)
counter = dataobj.PKWithTags(metric, tagStr)
return
}
func fetchDataSync(start, end int64, consolFun, endpoint, counter string, step int, worker chan struct{}, dataChan chan *dataobj.TsdbQueryResponse) {
defer func() {
<-worker
}()
stats.Counter.Set("query.tsdb", 1)
data, err := fetchData(start, end, consolFun, endpoint, counter, step)
if err != nil {
logger.Warningf("fetch tsdb data error: %+v", err)
stats.Counter.Set("query.data.err", 1)
data.Endpoint = endpoint
data.Counter = counter
data.Step = step
}
dataChan <- data
}
func fetchData(start, end int64, consolFun, endpoint, counter string, step int) (*dataobj.TsdbQueryResponse, error) {
var resp *dataobj.TsdbQueryResponse
qparm := GenQParam(start, end, consolFun, endpoint, counter, step)
resp, err := QueryOne(qparm)
if err != nil {
return resp, err
}
resp.Start = start
resp.End = end
return resp, nil
}
func getCounterStep(endpoint, counter string) (step int, err error) {
//从内存中获取
return
}
func GenQParam(start, end int64, consolFunc, endpoint, counter string, step int) dataobj.TsdbQueryParam {
return dataobj.TsdbQueryParam{
Start: start,
End: end,
ConsolFunc: consolFunc,
Endpoint: endpoint,
Counter: counter,
Step: step,
}
}
func QueryOne(para dataobj.TsdbQueryParam) (resp *dataobj.TsdbQueryResponse, err error) {
start, end := para.Start, para.End
resp = &dataobj.TsdbQueryResponse{}
pk := dataobj.PKWithCounter(para.Endpoint, para.Counter)
ps, err := SelectPoolByPK(pk)
if err != nil {
return resp, err
}
count := len(ps)
for _, i := range rand.Perm(count) {
onePool := ps[i].Pool
addr := ps[i].Addr
conn, err := onePool.Fetch()
if err != nil {
logger.Errorf("fetch pool error: %+v", err)
continue
}
rpcConn := conn.(pools.RpcClient)
if rpcConn.Closed() {
onePool.ForceClose(conn)
err = errors.New("conn closed")
logger.Error(err)
continue
}
type ChResult struct {
Err error
Resp *dataobj.TsdbQueryResponse
}
ch := make(chan *ChResult, 1)
go func() {
resp := &dataobj.TsdbQueryResponse{}
err := rpcConn.Call("Tsdb.Query", para, resp)
ch <- &ChResult{Err: err, Resp: resp}
}()
select {
case <-time.After(time.Duration(callTimeout) * time.Millisecond):
onePool.ForceClose(conn)
logger.Errorf("%s, call timeout. proc: %s", addr, onePool.Proc())
break
case r := <-ch:
if r.Err != nil {
onePool.ForceClose(conn)
logger.Errorf("%s, call failed, err %v. proc: %s", addr, r.Err, onePool.Proc())
break
} else {
onePool.Release(conn)
if len(r.Resp.Values) < 1 {
r.Resp.Values = []*dataobj.RRDData{}
return r.Resp, nil
}
fixed := make([]*dataobj.RRDData, 0)
for _, v := range r.Resp.Values {
if v == nil || !(v.Timestamp >= start && v.Timestamp <= end) {
continue
}
fixed = append(fixed, v)
}
r.Resp.Values = fixed
}
return r.Resp, nil
}
}
return resp, fmt.Errorf("get data error")
}
type Pool struct {
Pool *pool.ConnPool
Addr string
}
func SelectPoolByPK(pk string) ([]Pool, error) {
node, err := TsdbNodeRing.GetNode(pk)
if err != nil {
return []Pool{}, err
}
nodeAddrs, found := Config.ClusterList[node]
if !found {
return []Pool{}, errors.New("node not found")
}
var ps []Pool
for _, addr := range nodeAddrs.Addrs {
onePool, found := TsdbConnPools.Get(addr)
if !found {
logger.Errorf("addr %s not found", addr)
continue
}
ps = append(ps, Pool{Pool: onePool, Addr: addr})
}
if len(ps) < 1 {
return ps, errors.New("addr not found")
}
return ps, nil
}
func getTags(counter string) (tags string) {
idx := strings.IndexAny(counter, "/")
if idx == -1 {
return ""
}
return counter[idx+1:]
}
type Tagkv struct {
TagK string `json:"tagk"`
TagV []string `json:"tagv"`
}
type SeriesReq struct {
Endpoints []string `json:"endpoints"`
Metric string `json:"metric"`
Tagkv []*Tagkv `json:"tagkv"`
}
type SeriesResp struct {
Dat []Series `json:"dat"`
Err string `json:"err"`
}
type Series struct {
Endpoints []string `json:"endpoints"`
Metric string `json:"metric"`
Tags []string `json:"tags"`
Step int `json:"step"`
DsType string `json:"dstype"`
}
func GetSeries(start, end int64, req []SeriesReq) ([]dataobj.QueryData, error) {
var res SeriesResp
var queryDatas []dataobj.QueryData
if len(req) < 1 {
return queryDatas, fmt.Errorf("req length < 1")
}
addrs := address.GetHTTPAddresses("index")
if len(addrs) < 1 {
return queryDatas, fmt.Errorf("index addr is nil")
}
i := rand.Intn(len(addrs))
addr := fmt.Sprintf("http://%s/api/index/counter/fullmatch", addrs[i])
resp, code, err := httplib.PostJSON(addr, time.Duration(Config.IndexTimeout)*time.Millisecond, req, nil)
if err != nil {
return queryDatas, err
}
if code != 200 {
return nil, fmt.Errorf("index response status code != 200")
}
if err = json.Unmarshal(resp, &res); err != nil {
logger.Error(string(resp))
return queryDatas, err
}
for _, item := range res.Dat {
counters := make([]string, 0)
if len(item.Tags) == 0 {
counters = append(counters, item.Metric)
} else {
for _, tag := range item.Tags {
tagMap, err := dataobj.SplitTagsString(tag)
if err != nil {
logger.Warning(err, tag)
continue
}
tagStr := dataobj.SortedTags(tagMap)
counter := dataobj.PKWithTags(item.Metric, tagStr)
counters = append(counters, counter)
}
}
queryData := dataobj.QueryData{
Start: start,
End: end,
Endpoints: item.Endpoints,
Counters: counters,
ConsolFunc: "AVERAGE",
DsType: item.DsType,
Step: item.Step,
}
queryDatas = append(queryDatas, queryData)
}
return queryDatas, err
}