mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-11-21 14:44:00 +00:00
503 lines
19 KiB
Go
503 lines
19 KiB
Go
package vmselect
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import (
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"errors"
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"flag"
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"fmt"
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"net/http"
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"strings"
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"time"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/graphite"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/netstorage"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/prometheus"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/promql"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmselect/searchutils"
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"github.com/VictoriaMetrics/VictoriaMetrics/app/vmstorage"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/fs"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/httpserver"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/timerpool"
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"github.com/VictoriaMetrics/metrics"
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)
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var (
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deleteAuthKey = flag.String("deleteAuthKey", "", "authKey for metrics' deletion via /api/v1/admin/tsdb/delete_series and /tags/delSeries")
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maxConcurrentRequests = flag.Int("search.maxConcurrentRequests", getDefaultMaxConcurrentRequests(), "The maximum number of concurrent search requests. "+
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"It shouldn't be high, since a single request can saturate all the CPU cores. See also -search.maxQueueDuration")
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maxQueueDuration = flag.Duration("search.maxQueueDuration", 10*time.Second, "The maximum time the request waits for execution when -search.maxConcurrentRequests "+
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"limit is reached; see also -search.maxQueryDuration")
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resetCacheAuthKey = flag.String("search.resetCacheAuthKey", "", "Optional authKey for resetting rollup cache via /internal/resetRollupResultCache call")
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)
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func getDefaultMaxConcurrentRequests() int {
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n := cgroup.AvailableCPUs()
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if n <= 4 {
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n *= 2
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}
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if n > 16 {
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// A single request can saturate all the CPU cores, so there is no sense
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// in allowing higher number of concurrent requests - they will just contend
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// for unavailable CPU time.
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n = 16
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}
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return n
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}
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// Init initializes vmselect
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func Init() {
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tmpDirPath := *vmstorage.DataPath + "/tmp"
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fs.RemoveDirContents(tmpDirPath)
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netstorage.InitTmpBlocksDir(tmpDirPath)
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promql.InitRollupResultCache(*vmstorage.DataPath + "/cache/rollupResult")
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concurrencyCh = make(chan struct{}, *maxConcurrentRequests)
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}
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// Stop stops vmselect
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func Stop() {
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promql.StopRollupResultCache()
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}
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var concurrencyCh chan struct{}
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var (
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concurrencyLimitReached = metrics.NewCounter(`vm_concurrent_select_limit_reached_total`)
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concurrencyLimitTimeout = metrics.NewCounter(`vm_concurrent_select_limit_timeout_total`)
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_ = metrics.NewGauge(`vm_concurrent_select_capacity`, func() float64 {
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return float64(cap(concurrencyCh))
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})
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_ = metrics.NewGauge(`vm_concurrent_select_current`, func() float64 {
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return float64(len(concurrencyCh))
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})
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)
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// RequestHandler handles remote read API requests for Prometheus
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func RequestHandler(w http.ResponseWriter, r *http.Request) bool {
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startTime := time.Now()
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// Limit the number of concurrent queries.
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select {
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case concurrencyCh <- struct{}{}:
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defer func() { <-concurrencyCh }()
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default:
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// Sleep for a while until giving up. This should resolve short bursts in requests.
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concurrencyLimitReached.Inc()
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d := searchutils.GetMaxQueryDuration(r)
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if d > *maxQueueDuration {
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d = *maxQueueDuration
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}
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t := timerpool.Get(d)
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select {
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case concurrencyCh <- struct{}{}:
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timerpool.Put(t)
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defer func() { <-concurrencyCh }()
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case <-t.C:
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timerpool.Put(t)
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concurrencyLimitTimeout.Inc()
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err := &httpserver.ErrorWithStatusCode{
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Err: fmt.Errorf("cannot handle more than %d concurrent search requests during %s; possible solutions: "+
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"increase `-search.maxQueueDuration`; increase `-search.maxQueryDuration`; increase `-search.maxConcurrentRequests`; "+
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"increase server capacity",
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*maxConcurrentRequests, d),
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StatusCode: http.StatusServiceUnavailable,
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}
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httpserver.Errorf(w, r, "%s", err)
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return true
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}
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}
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path := strings.Replace(r.URL.Path, "//", "/", -1)
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if path == "/internal/resetRollupResultCache" {
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if len(*resetCacheAuthKey) > 0 && r.FormValue("authKey") != *resetCacheAuthKey {
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sendPrometheusError(w, r, fmt.Errorf("invalid authKey=%q for %q", r.FormValue("authKey"), path))
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return true
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}
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promql.ResetRollupResultCache()
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return true
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}
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// Strip /prometheus and /graphite prefixes in order to provide path compatibility with cluster version
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//
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// See https://victoriametrics.github.io/Cluster-VictoriaMetrics.html#url-format
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switch {
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case strings.HasPrefix(path, "/prometheus"):
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path = path[len("/prometheus"):]
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case strings.HasPrefix(path, "/graphite"):
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path = path[len("/graphite"):]
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}
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if strings.HasPrefix(path, "/api/v1/label/") {
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s := path[len("/api/v1/label/"):]
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if strings.HasSuffix(s, "/values") {
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labelValuesRequests.Inc()
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labelName := s[:len(s)-len("/values")]
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httpserver.EnableCORS(w, r)
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if err := prometheus.LabelValuesHandler(startTime, labelName, w, r); err != nil {
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labelValuesErrors.Inc()
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sendPrometheusError(w, r, err)
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return true
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}
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return true
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}
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}
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if strings.HasPrefix(path, "/tags/") && !isGraphiteTagsPath(path) {
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tagName := path[len("/tags/"):]
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graphiteTagValuesRequests.Inc()
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if err := graphite.TagValuesHandler(startTime, tagName, w, r); err != nil {
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graphiteTagValuesErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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}
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switch path {
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case "/api/v1/query":
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queryRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := prometheus.QueryHandler(startTime, w, r); err != nil {
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queryErrors.Inc()
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sendPrometheusError(w, r, err)
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return true
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}
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return true
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case "/api/v1/query_range":
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queryRangeRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := prometheus.QueryRangeHandler(startTime, w, r); err != nil {
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queryRangeErrors.Inc()
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sendPrometheusError(w, r, err)
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return true
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}
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return true
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case "/api/v1/series":
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seriesRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := prometheus.SeriesHandler(startTime, w, r); err != nil {
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seriesErrors.Inc()
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sendPrometheusError(w, r, err)
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return true
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}
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return true
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case "/api/v1/series/count":
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seriesCountRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := prometheus.SeriesCountHandler(startTime, w, r); err != nil {
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seriesCountErrors.Inc()
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sendPrometheusError(w, r, err)
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return true
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}
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return true
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case "/api/v1/labels":
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labelsRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := prometheus.LabelsHandler(startTime, w, r); err != nil {
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labelsErrors.Inc()
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sendPrometheusError(w, r, err)
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return true
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}
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return true
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case "/api/v1/labels/count":
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labelsCountRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := prometheus.LabelsCountHandler(startTime, w, r); err != nil {
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labelsCountErrors.Inc()
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sendPrometheusError(w, r, err)
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return true
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}
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return true
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case "/api/v1/status/tsdb":
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statusTSDBRequests.Inc()
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if err := prometheus.TSDBStatusHandler(startTime, w, r); err != nil {
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statusTSDBErrors.Inc()
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sendPrometheusError(w, r, err)
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return true
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}
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return true
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case "/api/v1/status/active_queries":
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statusActiveQueriesRequests.Inc()
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promql.WriteActiveQueries(w)
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return true
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case "/api/v1/status/top_queries":
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topQueriesRequests.Inc()
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if err := prometheus.QueryStatsHandler(startTime, w, r); err != nil {
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topQueriesErrors.Inc()
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sendPrometheusError(w, r, fmt.Errorf("cannot query status endpoint: %w", err))
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return true
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}
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return true
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case "/api/v1/export":
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exportRequests.Inc()
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if err := prometheus.ExportHandler(startTime, w, r); err != nil {
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exportErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/api/v1/export/csv":
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exportCSVRequests.Inc()
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if err := prometheus.ExportCSVHandler(startTime, w, r); err != nil {
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exportCSVErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/api/v1/export/native":
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exportNativeRequests.Inc()
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if err := prometheus.ExportNativeHandler(startTime, w, r); err != nil {
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exportNativeErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/federate":
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federateRequests.Inc()
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if err := prometheus.FederateHandler(startTime, w, r); err != nil {
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federateErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/metrics/find", "/metrics/find/":
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graphiteMetricsFindRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := graphite.MetricsFindHandler(startTime, w, r); err != nil {
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graphiteMetricsFindErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/metrics/expand", "/metrics/expand/":
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graphiteMetricsExpandRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := graphite.MetricsExpandHandler(startTime, w, r); err != nil {
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graphiteMetricsExpandErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/metrics/index.json", "/metrics/index.json/":
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graphiteMetricsIndexRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := graphite.MetricsIndexHandler(startTime, w, r); err != nil {
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graphiteMetricsIndexErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/tags/tagSeries":
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graphiteTagsTagSeriesRequests.Inc()
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if err := graphite.TagsTagSeriesHandler(startTime, w, r); err != nil {
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graphiteTagsTagSeriesErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/tags/tagMultiSeries":
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graphiteTagsTagMultiSeriesRequests.Inc()
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if err := graphite.TagsTagMultiSeriesHandler(startTime, w, r); err != nil {
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graphiteTagsTagMultiSeriesErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/tags":
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graphiteTagsRequests.Inc()
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if err := graphite.TagsHandler(startTime, w, r); err != nil {
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graphiteTagsErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/tags/findSeries":
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graphiteTagsFindSeriesRequests.Inc()
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if err := graphite.TagsFindSeriesHandler(startTime, w, r); err != nil {
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graphiteTagsFindSeriesErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/tags/autoComplete/tags":
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graphiteTagsAutoCompleteTagsRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := graphite.TagsAutoCompleteTagsHandler(startTime, w, r); err != nil {
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graphiteTagsAutoCompleteTagsErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/tags/autoComplete/values":
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graphiteTagsAutoCompleteValuesRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := graphite.TagsAutoCompleteValuesHandler(startTime, w, r); err != nil {
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graphiteTagsAutoCompleteValuesErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/tags/delSeries":
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graphiteTagsDelSeriesRequests.Inc()
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authKey := r.FormValue("authKey")
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if authKey != *deleteAuthKey {
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httpserver.Errorf(w, r, "invalid authKey %q. It must match the value from -deleteAuthKey command line flag", authKey)
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return true
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}
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if err := graphite.TagsDelSeriesHandler(startTime, w, r); err != nil {
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graphiteTagsDelSeriesErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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return true
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case "/api/v1/rules":
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// Return dumb placeholder for https://prometheus.io/docs/prometheus/latest/querying/api/#rules
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rulesRequests.Inc()
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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fmt.Fprintf(w, "%s", `{"status":"success","data":{"groups":[]}}`)
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return true
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case "/api/v1/alerts":
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// Return dumb placehloder for https://prometheus.io/docs/prometheus/latest/querying/api/#alerts
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alertsRequests.Inc()
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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fmt.Fprintf(w, "%s", `{"status":"success","data":{"alerts":[]}}`)
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return true
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case "/api/v1/metadata":
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// Return dumb placeholder for https://prometheus.io/docs/prometheus/latest/querying/api/#querying-metric-metadata
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metadataRequests.Inc()
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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fmt.Fprintf(w, "%s", `{"status":"success","data":{}}`)
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return true
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case "/api/v1/query_exemplars":
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// Return dumb placeholder for https://prometheus.io/docs/prometheus/latest/querying/api/#querying-exemplars
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queryExemplarsRequests.Inc()
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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fmt.Fprintf(w, "%s", `{"status":"success","data":null}`)
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return true
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case "/api/v1/admin/tsdb/delete_series":
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deleteRequests.Inc()
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authKey := r.FormValue("authKey")
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if authKey != *deleteAuthKey {
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httpserver.Errorf(w, r, "invalid authKey %q. It must match the value from -deleteAuthKey command line flag", authKey)
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return true
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}
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if err := prometheus.DeleteHandler(startTime, r); err != nil {
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deleteErrors.Inc()
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httpserver.Errorf(w, r, "error in %q: %s", r.URL.Path, err)
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return true
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}
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w.WriteHeader(http.StatusNoContent)
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return true
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default:
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return false
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}
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}
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func isGraphiteTagsPath(path string) bool {
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switch path {
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// See https://graphite.readthedocs.io/en/stable/tags.html for a list of Graphite Tags API paths.
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// Do not include `/tags/<tag_name>` here, since this will fool the caller.
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case "/tags/tagSeries", "/tags/tagMultiSeries", "/tags/findSeries",
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"/tags/autoComplete/tags", "/tags/autoComplete/values", "/tags/delSeries":
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return true
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default:
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return false
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}
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}
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func sendPrometheusError(w http.ResponseWriter, r *http.Request, err error) {
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logger.Warnf("error in %q: %s", r.RequestURI, err)
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w.Header().Set("Content-Type", "application/json; charset=utf-8")
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statusCode := http.StatusUnprocessableEntity
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var esc *httpserver.ErrorWithStatusCode
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if errors.As(err, &esc) {
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statusCode = esc.StatusCode
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}
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w.WriteHeader(statusCode)
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prometheus.WriteErrorResponse(w, statusCode, err)
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}
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var (
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labelValuesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/label/{}/values"}`)
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labelValuesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/label/{}/values"}`)
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queryRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/query"}`)
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queryErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/query"}`)
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queryRangeRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/query_range"}`)
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queryRangeErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/query_range"}`)
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seriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/series"}`)
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seriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/series"}`)
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seriesCountRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/series/count"}`)
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seriesCountErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/series/count"}`)
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labelsRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/labels"}`)
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labelsErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/labels"}`)
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labelsCountRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/labels/count"}`)
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labelsCountErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/labels/count"}`)
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statusTSDBRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/status/tsdb"}`)
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statusTSDBErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/status/tsdb"}`)
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statusActiveQueriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/status/active_queries"}`)
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topQueriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/status/top_queries"}`)
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topQueriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/status/top_queries"}`)
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deleteRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/admin/tsdb/delete_series"}`)
|
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deleteErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/admin/tsdb/delete_series"}`)
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|
|
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exportRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/export"}`)
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exportErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/export"}`)
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exportCSVRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/export/csv"}`)
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exportCSVErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/export/csv"}`)
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|
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exportNativeRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/export/native"}`)
|
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exportNativeErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/export/native"}`)
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|
|
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federateRequests = metrics.NewCounter(`vm_http_requests_total{path="/federate"}`)
|
|
federateErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/federate"}`)
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|
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graphiteMetricsFindRequests = metrics.NewCounter(`vm_http_requests_total{path="/metrics/find"}`)
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|
graphiteMetricsFindErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/metrics/find"}`)
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|
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graphiteMetricsExpandRequests = metrics.NewCounter(`vm_http_requests_total{path="/metrics/expand"}`)
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|
graphiteMetricsExpandErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/metrics/expand"}`)
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|
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|
graphiteMetricsIndexRequests = metrics.NewCounter(`vm_http_requests_total{path="/metrics/index.json"}`)
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|
graphiteMetricsIndexErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/metrics/index.json"}`)
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graphiteTagsTagSeriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/tagSeries"}`)
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graphiteTagsTagSeriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/tagSeries"}`)
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graphiteTagsTagMultiSeriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/tagMultiSeries"}`)
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graphiteTagsTagMultiSeriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/tagMultiSeries"}`)
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graphiteTagsRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags"}`)
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|
graphiteTagsErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags"}`)
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graphiteTagValuesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/<tag_name>"}`)
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|
graphiteTagValuesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/<tag_name>"}`)
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|
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graphiteTagsFindSeriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/findSeries"}`)
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|
graphiteTagsFindSeriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/findSeries"}`)
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|
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graphiteTagsAutoCompleteTagsRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/autoComplete/tags"}`)
|
|
graphiteTagsAutoCompleteTagsErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/autoComplete/tags"}`)
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|
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graphiteTagsAutoCompleteValuesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/autoComplete/values"}`)
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|
graphiteTagsAutoCompleteValuesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/autoComplete/values"}`)
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|
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|
graphiteTagsDelSeriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/delSeries"}`)
|
|
graphiteTagsDelSeriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/delSeries"}`)
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|
|
|
rulesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/rules"}`)
|
|
alertsRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/alerts"}`)
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|
metadataRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/metadata"}`)
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|
queryExemplarsRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/query_exemplars"}`)
|
|
)
|