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app/vmselect: add -search.maxExportDuration command-line flag for limiting /api/v1/export duration

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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/275
This commit is contained in:
Aliaksandr Valialkin 2019-12-20 11:34:52 +02:00
parent a37a006f11
commit cc8a1bae0e
1 changed files with 25 additions and 15 deletions
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40
app/vmselect/prometheus/prometheus.go
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@ -25,9 +25,10 @@ import (
var (
latencyOffset = flag.Duration("search.latencyOffset", time.Second*30, "The time when data points become visible in query results after the colection. "+
"Too small value can result in incomplete last points for query results")
maxQueryDuration = flag.Duration("search.maxQueryDuration", time.Second*30, "The maximum time for search query execution")
maxQueryLen = flag.Int("search.maxQueryLen", 16*1024, "The maximum search query length in bytes")
maxLookback = flag.Duration("search.maxLookback", 0, "Synonim to `-search.lookback-delta` from Prometheus. "+
maxExportDuration = flag.Duration("search.maxExportDuration", 10*time.Minute, "The maximum duration for `/api/v1/export` call")
maxQueryDuration = flag.Duration("search.maxQueryDuration", time.Second*30, "The maximum duration for search query execution")
maxQueryLen = flag.Int("search.maxQueryLen", 16*1024, "The maximum search query length in bytes")
maxLookback = flag.Duration("search.maxLookback", 0, "Synonim to `-search.lookback-delta` from Prometheus. "+
"The value is dynamically detected from interval between time series datapoints if not set. It can be overridden on per-query basis via `max_lookback` arg")
denyPartialResponse = flag.Bool("search.denyPartialResponse", false, "Whether to deny partial responses when some of vmstorage nodes are unavailable. This trades consistency over availability")
selectNodes = flagutil.NewArray("selectNode", "Addresses of vmselect nodes; usage: -selectNode=vmselect-host1:8481 -selectNode=vmselect-host2:8481")
@ -62,7 +63,7 @@ func FederateHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) err
if err != nil {
return err
}
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
if start >= end {
start = end - defaultStep
}
@ -138,7 +139,7 @@ func ExportHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) error
return err
}
format := r.FormValue("format")
deadline := getDeadline(r)
deadline := getDeadlineForExport(r)
if start >= end {
end = start + defaultStep
}
@ -225,7 +226,7 @@ func DeleteHandler(at *auth.Token, r *http.Request) error {
if len(matches) == 0 {
return fmt.Errorf("missing `match[]` arg")
}
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
tagFilterss, err := getTagFilterssFromMatches(matches)
if err != nil {
return err
@ -288,7 +289,7 @@ var httpClient = &http.Client{
// See https://prometheus.io/docs/prometheus/latest/querying/api/#querying-label-values
func LabelValuesHandler(at *auth.Token, labelName string, w http.ResponseWriter, r *http.Request) error {
startTime := time.Now()
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
if err := r.ParseForm(); err != nil {
return fmt.Errorf("cannot parse form values: %s", err)
@ -392,7 +393,7 @@ var labelValuesDuration = metrics.NewSummary(`vm_request_duration_seconds{path="
// LabelsCountHandler processes /api/v1/labels/count request.
func LabelsCountHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) error {
startTime := time.Now()
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
labelEntries, isPartial, err := netstorage.GetLabelEntries(at, deadline)
if err != nil {
return fmt.Errorf(`cannot obtain label entries: %s`, err)
@ -414,7 +415,7 @@ var labelsCountDuration = metrics.NewSummary(`vm_request_duration_seconds{path="
// See https://prometheus.io/docs/prometheus/latest/querying/api/#getting-label-names
func LabelsHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) error {
startTime := time.Now()
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
if err := r.ParseForm(); err != nil {
return fmt.Errorf("cannot parse form values: %s", err)
@ -510,7 +511,7 @@ var labelsDuration = metrics.NewSummary(`vm_request_duration_seconds{path="/api/
// SeriesCountHandler processes /api/v1/series/count request.
func SeriesCountHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) error {
startTime := time.Now()
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
n, isPartial, err := netstorage.GetSeriesCount(at, deadline)
if err != nil {
return fmt.Errorf("cannot obtain series count: %s", err)
@ -554,7 +555,7 @@ func SeriesHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) error
if err != nil {
return err
}
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
tagFilterss, err := getTagFilterssFromMatches(matches)
if err != nil {
@ -628,7 +629,7 @@ func QueryHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) error
if err != nil {
return err
}
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
lookbackDelta, err := getMaxLookback(r)
if err != nil {
return err
@ -754,7 +755,7 @@ func QueryRangeHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) e
}
func queryRangeHandler(at *auth.Token, w http.ResponseWriter, query string, start, end, step int64, r *http.Request, ct int64) error {
deadline := getDeadline(r)
deadline := getDeadlineForQuery(r)
mayCache := !getBool(r, "nocache")
lookbackDelta, err := getMaxLookback(r)
if err != nil {
@ -949,12 +950,21 @@ func getMaxLookback(r *http.Request) (int64, error) {
return getDuration(r, "max_lookback", d)
}
func getDeadline(r *http.Request) netstorage.Deadline {
func getDeadlineForQuery(r *http.Request) netstorage.Deadline {
dMax := int64(maxQueryDuration.Seconds() * 1e3)
return getDeadlineWithMaxDuration(r, dMax)
}
func getDeadlineForExport(r *http.Request) netstorage.Deadline {
dMax := int64(maxExportDuration.Seconds() * 1e3)
return getDeadlineWithMaxDuration(r, dMax)
}
func getDeadlineWithMaxDuration(r *http.Request, dMax int64) netstorage.Deadline {
d, err := getDuration(r, "timeout", 0)
if err != nil {
d = 0
}
dMax := int64(maxQueryDuration.Seconds() * 1e3)
if d <= 0 || d > dMax {
d = dMax
}