mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-26 20:30:10 +01:00
427ce69426
While at it, move app/vmselect/bufferedwriter to lib/bufferedwriter, since it is going to be used in VictoriaLogs
276 lines
8.3 KiB
Go
276 lines
8.3 KiB
Go
package graphite
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"net/http"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/auth"
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/lib/bufferedwriter"
|
|
"github.com/VictoriaMetrics/metrics"
|
|
)
|
|
|
|
var (
|
|
storageStep = flag.Duration("search.graphiteStorageStep", 10*time.Second, "The interval between datapoints stored in the database. "+
|
|
"It is used at Graphite Render API handler for normalizing the interval between datapoints in case it isn't normalized. "+
|
|
"It can be overridden by sending 'storage_step' query arg to /render API or "+
|
|
"by sending the desired interval via 'Storage-Step' http header during querying /render API")
|
|
maxPointsPerSeries = flag.Int("search.graphiteMaxPointsPerSeries", 1e6, "The maximum number of points per series Graphite render API can return")
|
|
)
|
|
|
|
// RenderHandler implements /render endpoint from Graphite Render API.
|
|
//
|
|
// See https://graphite.readthedocs.io/en/stable/render_api.html
|
|
func RenderHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter, r *http.Request) error {
|
|
deadline := searchutils.GetDeadlineForQuery(r, startTime)
|
|
format := r.FormValue("format")
|
|
if format != "json" {
|
|
return fmt.Errorf("unsupported format=%q; supported values: json", format)
|
|
}
|
|
xFilesFactor := float64(0)
|
|
if xff := r.FormValue("xFilesFactor"); len(xff) > 0 {
|
|
f, err := strconv.ParseFloat(xff, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("cannot parse xFilesFactor=%q: %w", xff, err)
|
|
}
|
|
xFilesFactor = f
|
|
}
|
|
from := r.FormValue("from")
|
|
fromTime := startTime.UnixNano()/1e6 - 24*3600*1000
|
|
if len(from) != 0 {
|
|
fv, err := parseTime(startTime, from)
|
|
if err != nil {
|
|
return fmt.Errorf("cannot parse from=%q: %w", from, err)
|
|
}
|
|
fromTime = fv
|
|
}
|
|
until := r.FormValue("until")
|
|
untilTime := startTime.UnixNano() / 1e6
|
|
if len(until) != 0 {
|
|
uv, err := parseTime(startTime, until)
|
|
if err != nil {
|
|
return fmt.Errorf("cannot parse until=%q: %w", until, err)
|
|
}
|
|
untilTime = uv
|
|
}
|
|
storageStep, err := getStorageStep(r)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
fromAlign := fromTime % storageStep
|
|
fromTime -= fromAlign
|
|
if fromAlign > 0 {
|
|
fromTime += storageStep
|
|
}
|
|
untilAlign := untilTime % storageStep
|
|
untilTime -= untilAlign
|
|
if untilAlign > 0 {
|
|
untilTime += storageStep
|
|
}
|
|
if untilTime < fromTime {
|
|
return fmt.Errorf("from=%s cannot exceed until=%s", from, until)
|
|
}
|
|
pointsPerSeries := (untilTime - fromTime) / storageStep
|
|
if pointsPerSeries > int64(*maxPointsPerSeries) {
|
|
return fmt.Errorf("too many points per series must be returned on the given [from=%s ... until=%s] time range and the given storageStep=%d: %d; "+
|
|
"either reduce the time range or increase -search.graphiteMaxPointsPerSeries=%d", from, until, storageStep, pointsPerSeries, *maxPointsPerSeries)
|
|
}
|
|
maxDataPoints := 0
|
|
if s := r.FormValue("maxDataPoints"); len(s) > 0 {
|
|
n, err := strconv.ParseFloat(s, 64)
|
|
if err != nil {
|
|
return fmt.Errorf("cannot parse maxDataPoints=%q: %w", maxDataPoints, err)
|
|
}
|
|
if n <= 0 {
|
|
return fmt.Errorf("maxDataPoints must be greater than 0; got %f", n)
|
|
}
|
|
maxDataPoints = int(n)
|
|
}
|
|
etfs, err := searchutils.GetExtraTagFilters(r)
|
|
if err != nil {
|
|
return fmt.Errorf("cannot setup tag filters: %w", err)
|
|
}
|
|
var nextSeriess []nextSeriesFunc
|
|
targets := r.Form["target"]
|
|
for _, target := range targets {
|
|
ec := &evalConfig{
|
|
at: at,
|
|
startTime: fromTime,
|
|
endTime: untilTime,
|
|
storageStep: storageStep,
|
|
deadline: deadline,
|
|
currentTime: startTime,
|
|
xFilesFactor: xFilesFactor,
|
|
etfs: etfs,
|
|
originalQuery: target,
|
|
}
|
|
nextSeries, err := execExpr(ec, target)
|
|
if err != nil {
|
|
for _, f := range nextSeriess {
|
|
_, _ = drainAllSeries(f)
|
|
}
|
|
return fmt.Errorf("cannot eval target=%q: %w", target, err)
|
|
}
|
|
// do not use nextSeriesConcurrentWrapper here in order to preserve series order.
|
|
if maxDataPoints > 0 {
|
|
step := (ec.endTime - ec.startTime) / int64(maxDataPoints)
|
|
nextSeries = nextSeriesSerialWrapper(nextSeries, func(s *series) (*series, error) {
|
|
aggrFunc := s.consolidateFunc
|
|
if aggrFunc == nil {
|
|
aggrFunc = aggrAvg
|
|
}
|
|
xFilesFactor := s.xFilesFactor
|
|
if s.xFilesFactor <= 0 {
|
|
xFilesFactor = ec.xFilesFactor
|
|
}
|
|
if len(s.Values) > maxDataPoints {
|
|
s.summarize(aggrFunc, ec.startTime, ec.endTime, step, xFilesFactor)
|
|
}
|
|
return s, nil
|
|
})
|
|
}
|
|
nextSeriess = append(nextSeriess, nextSeries)
|
|
}
|
|
f := nextSeriesGroup(nextSeriess, nil)
|
|
jsonp := r.FormValue("jsonp")
|
|
contentType := getContentType(jsonp)
|
|
w.Header().Set("Content-Type", contentType)
|
|
bw := bufferedwriter.Get(w)
|
|
defer bufferedwriter.Put(bw)
|
|
WriteRenderJSONResponse(bw, f, jsonp)
|
|
if err := bw.Flush(); err != nil {
|
|
return err
|
|
}
|
|
renderDuration.UpdateDuration(startTime)
|
|
return nil
|
|
}
|
|
|
|
var renderDuration = metrics.NewSummary(`vm_request_duration_seconds{path="/render"}`)
|
|
|
|
const msecsPerDay = 24 * 3600 * 1000
|
|
|
|
// parseTime parses Graphite time in s.
|
|
//
|
|
// If the time in s is relative, then it is relative to startTime.
|
|
func parseTime(startTime time.Time, s string) (int64, error) {
|
|
switch s {
|
|
case "now":
|
|
return startTime.UnixNano() / 1e6, nil
|
|
case "today":
|
|
ts := startTime.UnixNano() / 1e6
|
|
return ts - ts%msecsPerDay, nil
|
|
case "yesterday":
|
|
ts := startTime.UnixNano() / 1e6
|
|
return ts - (ts % msecsPerDay) - msecsPerDay, nil
|
|
}
|
|
// Attempt to parse RFC3339 (YYYY-MM-DDTHH:mm:SSZTZ:00)
|
|
if t, err := time.Parse(time.RFC3339, s); err == nil {
|
|
return t.UnixNano() / 1e6, nil
|
|
}
|
|
// Attempt to parse HH:MM_YYYYMMDD
|
|
if t, err := time.Parse("15:04_20060102", s); err == nil {
|
|
return t.UnixNano() / 1e6, nil
|
|
}
|
|
// Attempt to parse HH:MMYYYYMMDD
|
|
if t, err := time.Parse("15:0420060102", s); err == nil {
|
|
return t.UnixNano() / 1e6, nil
|
|
}
|
|
// Attempt to parse YYYYMMDD
|
|
if t, err := time.Parse("20060102", s); err == nil {
|
|
return t.UnixNano() / 1e6, nil
|
|
}
|
|
// Attempt to parse HH:MM YYYYMMDD
|
|
if t, err := time.Parse("15:04 20060102", s); err == nil {
|
|
return t.UnixNano() / 1e6, nil
|
|
}
|
|
// Attempt to parse YYYY-MM-DD
|
|
if t, err := time.Parse("2006-01-02", s); err == nil {
|
|
return t.UnixNano() / 1e6, nil
|
|
}
|
|
// Attempt to parse MM/DD/YY
|
|
if t, err := time.Parse("01/02/06", s); err == nil {
|
|
return t.UnixNano() / 1e6, nil
|
|
}
|
|
|
|
// Attempt to parse time as unix timestamp
|
|
if n, err := strconv.ParseInt(s, 10, 64); err == nil {
|
|
return n * 1000, nil
|
|
}
|
|
// Attempt to parse interval
|
|
if interval, err := parseInterval(s); err == nil {
|
|
return startTime.UnixNano()/1e6 + interval, nil
|
|
}
|
|
return 0, fmt.Errorf("unsupported time %q", s)
|
|
}
|
|
|
|
func parseInterval(s string) (int64, error) {
|
|
s = strings.TrimSpace(s)
|
|
prefix := s
|
|
var suffix string
|
|
for i := 0; i < len(s); i++ {
|
|
ch := s[i]
|
|
if ch != '-' && ch != '+' && ch != '.' && (ch < '0' || ch > '9') {
|
|
prefix = s[:i]
|
|
suffix = s[i:]
|
|
break
|
|
}
|
|
}
|
|
n, err := strconv.ParseFloat(prefix, 64)
|
|
if err != nil {
|
|
return 0, fmt.Errorf("cannot parse interval %q: %w", s, err)
|
|
}
|
|
suffix = strings.TrimSpace(suffix)
|
|
if len(suffix) == 0 {
|
|
return 0, fmt.Errorf("missing suffix for interval %q; expecting s, min, h, d, w, mon or y suffix", s)
|
|
}
|
|
var m float64
|
|
switch {
|
|
case strings.HasPrefix(suffix, "ms"):
|
|
m = 1
|
|
case strings.HasPrefix(suffix, "s"):
|
|
m = 1000
|
|
case strings.HasPrefix(suffix, "mi"),
|
|
strings.HasPrefix(suffix, "m") && !strings.HasPrefix(suffix, "mo"):
|
|
m = 60 * 1000
|
|
case strings.HasPrefix(suffix, "h"):
|
|
m = 3600 * 1000
|
|
case strings.HasPrefix(suffix, "d"):
|
|
m = 24 * 3600 * 1000
|
|
case strings.HasPrefix(suffix, "w"):
|
|
m = 7 * 24 * 3600 * 1000
|
|
case strings.HasPrefix(suffix, "mo"):
|
|
m = 30 * 24 * 3600 * 1000
|
|
case strings.HasPrefix(suffix, "y"):
|
|
m = 365 * 24 * 3600 * 1000
|
|
default:
|
|
return 0, fmt.Errorf("unsupported interval %q", s)
|
|
}
|
|
return int64(n * m), nil
|
|
}
|
|
|
|
func getStorageStep(r *http.Request) (int64, error) {
|
|
s := r.FormValue("storage_step")
|
|
if len(s) == 0 {
|
|
s = r.Header.Get("Storage-Step")
|
|
}
|
|
if len(s) == 0 {
|
|
step := int64(storageStep.Seconds() * 1000)
|
|
if step <= 0 {
|
|
return 0, fmt.Errorf("the `-search.graphiteStorageStep` command-line flag value must be positive; got %s", storageStep.String())
|
|
}
|
|
return step, nil
|
|
}
|
|
step, err := parseInterval(s)
|
|
if err != nil {
|
|
return 0, fmt.Errorf("cannot parse datapoints interval %s: %w", s, err)
|
|
}
|
|
if step <= 0 {
|
|
return 0, fmt.Errorf("storage_step cannot be negative; got %s", s)
|
|
}
|
|
return step, nil
|
|
}
|