mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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12ac255dae
The context message can be extended by calling Donef. If there is no need to extend the message, then just call Done.
610 lines
23 KiB
Go
610 lines
23 KiB
Go
package vmselect
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import (
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"embed"
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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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"net/http/httputil"
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"net/url"
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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/querytracer"
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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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logSlowQueryDuration = flag.Duration("search.logSlowQueryDuration", 5*time.Second, "Log queries with execution time exceeding this value. Zero disables slow query logging")
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vmalertProxyURL = flag.String("vmalert.proxyURL", "", "Optional URL for proxying alerting API requests from Grafana. For example, if -vmalert.proxyURL is set to http://vmalert:8880 , then requests to /api/v1/rules are proxied to http://vmalert:8880/api/v1/rules")
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)
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var slowQueries = metrics.NewCounter(`vm_slow_queries_total`)
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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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initVMAlertProxy()
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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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//go:embed vmui
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var vmuiFiles embed.FS
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var vmuiFileServer = http.FileServer(http.FS(vmuiFiles))
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// RequestHandler handles remote read API requests
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func RequestHandler(w http.ResponseWriter, r *http.Request) bool {
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startTime := time.Now()
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defer requestDuration.UpdateDuration(startTime)
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tracerEnabled := searchutils.GetBool(r, "trace")
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qt := querytracer.New(tracerEnabled, r.URL.Path)
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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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qt.Printf("wait in queue because -search.maxConcurrentRequests=%d concurrent requests are executed", *maxConcurrentRequests)
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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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if *logSlowQueryDuration > 0 {
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actualStartTime := time.Now()
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defer func() {
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d := time.Since(actualStartTime)
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if d >= *logSlowQueryDuration {
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remoteAddr := httpserver.GetQuotedRemoteAddr(r)
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requestURI := httpserver.GetRequestURI(r)
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logger.Warnf("slow query according to -search.logSlowQueryDuration=%s: remoteAddr=%s, duration=%.3f seconds; requestURI: %q",
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*logSlowQueryDuration, remoteAddr, d.Seconds(), requestURI)
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slowQueries.Inc()
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}
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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://docs.victoriametrics.com/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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// vmui access.
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if strings.HasPrefix(path, "/vmui") {
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r.URL.Path = path
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vmuiFileServer.ServeHTTP(w, r)
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return true
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}
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if path == "/graph" {
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// Redirect to /graph/, otherwise vmui redirects to /vmui/, which can be inaccessible in user env.
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// Use relative redirect, since, since the hostname and path prefix may be incorrect if VictoriaMetrics
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// is hidden behind vmauth or similar proxy.
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_ = r.ParseForm()
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newURL := "graph/?" + r.Form.Encode()
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http.Redirect(w, r, newURL, http.StatusFound)
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return true
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}
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if strings.HasPrefix(path, "/graph/") {
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// This is needed for serving /graph URLs from Prometheus datasource in Grafana.
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r.URL.Path = strings.Replace(path, "/graph/", "/vmui/", 1)
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vmuiFileServer.ServeHTTP(w, r)
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return true
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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(qt, 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, "%s", 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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if strings.HasPrefix(path, "/functions") {
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graphiteFunctionsRequests.Inc()
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w.Header().Set("Content-Type", "application/json")
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fmt.Fprintf(w, "%s", `{}`)
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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(qt, 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(qt, 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(qt, 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(qt, 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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httpserver.EnableCORS(w, r)
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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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httpserver.EnableCORS(w, r)
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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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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, "%s", 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", "/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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mayProxyVMAlertRequests(w, r, `{"status":"success","data":{"groups":[]}}`)
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return true
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case "/api/v1/alerts", "/alerts":
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// Return dumb placeholder for https://prometheus.io/docs/prometheus/latest/querying/api/#alerts
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alertsRequests.Inc()
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mayProxyVMAlertRequests(w, r, `{"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")
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fmt.Fprintf(w, "%s", `{"status":"success","data":{}}`)
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return true
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case "/api/v1/status/buildinfo":
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buildInfoRequests.Inc()
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w.Header().Set("Content-Type", "application/json")
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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")
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fmt.Fprintf(w, "%s", `{"status":"success","data":[]}`)
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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, "%s", 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":
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
func sendPrometheusError(w http.ResponseWriter, r *http.Request, err error) {
|
|
logger.Warnf("error in %q: %s", httpserver.GetRequestURI(r), err)
|
|
|
|
w.Header().Set("Content-Type", "application/json")
|
|
statusCode := http.StatusUnprocessableEntity
|
|
var esc *httpserver.ErrorWithStatusCode
|
|
if errors.As(err, &esc) {
|
|
statusCode = esc.StatusCode
|
|
}
|
|
w.WriteHeader(statusCode)
|
|
prometheus.WriteErrorResponse(w, statusCode, err)
|
|
}
|
|
|
|
var (
|
|
requestDuration = metrics.NewHistogram(`vmselect_request_duration_seconds`)
|
|
|
|
labelValuesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/label/{}/values"}`)
|
|
labelValuesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/label/{}/values"}`)
|
|
|
|
queryRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/query"}`)
|
|
queryErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/query"}`)
|
|
|
|
queryRangeRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/query_range"}`)
|
|
queryRangeErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/query_range"}`)
|
|
|
|
seriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/series"}`)
|
|
seriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/series"}`)
|
|
|
|
seriesCountRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/series/count"}`)
|
|
seriesCountErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/series/count"}`)
|
|
|
|
labelsRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/labels"}`)
|
|
labelsErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/labels"}`)
|
|
|
|
labelsCountRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/labels/count"}`)
|
|
labelsCountErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/labels/count"}`)
|
|
|
|
statusTSDBRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/status/tsdb"}`)
|
|
statusTSDBErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/status/tsdb"}`)
|
|
|
|
statusActiveQueriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/status/active_queries"}`)
|
|
|
|
topQueriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/status/top_queries"}`)
|
|
topQueriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/status/top_queries"}`)
|
|
|
|
deleteRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/admin/tsdb/delete_series"}`)
|
|
deleteErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/admin/tsdb/delete_series"}`)
|
|
|
|
exportRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/export"}`)
|
|
exportErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/export"}`)
|
|
|
|
exportCSVRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/export/csv"}`)
|
|
exportCSVErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/export/csv"}`)
|
|
|
|
exportNativeRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/export/native"}`)
|
|
exportNativeErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/api/v1/export/native"}`)
|
|
|
|
federateRequests = metrics.NewCounter(`vm_http_requests_total{path="/federate"}`)
|
|
federateErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/federate"}`)
|
|
|
|
graphiteMetricsFindRequests = metrics.NewCounter(`vm_http_requests_total{path="/metrics/find"}`)
|
|
graphiteMetricsFindErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/metrics/find"}`)
|
|
|
|
graphiteMetricsExpandRequests = metrics.NewCounter(`vm_http_requests_total{path="/metrics/expand"}`)
|
|
graphiteMetricsExpandErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/metrics/expand"}`)
|
|
|
|
graphiteMetricsIndexRequests = metrics.NewCounter(`vm_http_requests_total{path="/metrics/index.json"}`)
|
|
graphiteMetricsIndexErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/metrics/index.json"}`)
|
|
|
|
graphiteTagsTagSeriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/tagSeries"}`)
|
|
graphiteTagsTagSeriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/tagSeries"}`)
|
|
|
|
graphiteTagsTagMultiSeriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/tagMultiSeries"}`)
|
|
graphiteTagsTagMultiSeriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/tagMultiSeries"}`)
|
|
|
|
graphiteTagsRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags"}`)
|
|
graphiteTagsErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags"}`)
|
|
|
|
graphiteTagValuesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/<tag_name>"}`)
|
|
graphiteTagValuesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/<tag_name>"}`)
|
|
|
|
graphiteTagsFindSeriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/findSeries"}`)
|
|
graphiteTagsFindSeriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/findSeries"}`)
|
|
|
|
graphiteTagsAutoCompleteTagsRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/autoComplete/tags"}`)
|
|
graphiteTagsAutoCompleteTagsErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/autoComplete/tags"}`)
|
|
|
|
graphiteTagsAutoCompleteValuesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/autoComplete/values"}`)
|
|
graphiteTagsAutoCompleteValuesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/autoComplete/values"}`)
|
|
|
|
graphiteTagsDelSeriesRequests = metrics.NewCounter(`vm_http_requests_total{path="/tags/delSeries"}`)
|
|
graphiteTagsDelSeriesErrors = metrics.NewCounter(`vm_http_request_errors_total{path="/tags/delSeries"}`)
|
|
|
|
graphiteFunctionsRequests = metrics.NewCounter(`vm_http_request_total{path="/functions"}`)
|
|
|
|
rulesRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/rules"}`)
|
|
alertsRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/alerts"}`)
|
|
metadataRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/metadata"}`)
|
|
buildInfoRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/buildinfo"}`)
|
|
queryExemplarsRequests = metrics.NewCounter(`vm_http_requests_total{path="/api/v1/query_exemplars"}`)
|
|
)
|
|
|
|
func mayProxyVMAlertRequests(w http.ResponseWriter, r *http.Request, stubResponse string) {
|
|
if len(*vmalertProxyURL) == 0 {
|
|
// Return dumb placeholder for https://prometheus.io/docs/prometheus/latest/querying/api/#rules
|
|
w.Header().Set("Content-Type", "application/json")
|
|
fmt.Fprintf(w, "%s", stubResponse)
|
|
return
|
|
}
|
|
defer func() {
|
|
err := recover()
|
|
if err == nil || err == http.ErrAbortHandler {
|
|
// Suppress http.ErrAbortHandler panic.
|
|
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1353
|
|
return
|
|
}
|
|
// Forward other panics to the caller.
|
|
panic(err)
|
|
}()
|
|
r.Host = vmalertProxyHost
|
|
vmalertProxy.ServeHTTP(w, r)
|
|
}
|
|
|
|
var (
|
|
vmalertProxyHost string
|
|
vmalertProxy *httputil.ReverseProxy
|
|
)
|
|
|
|
// initVMAlertProxy must be called after flag.Parse(), since it uses command-line flags.
|
|
func initVMAlertProxy() {
|
|
if len(*vmalertProxyURL) == 0 {
|
|
return
|
|
}
|
|
proxyURL, err := url.Parse(*vmalertProxyURL)
|
|
if err != nil {
|
|
logger.Fatalf("cannot parse -vmalert.proxyURL=%q: %s", *vmalertProxyURL, err)
|
|
}
|
|
vmalertProxyHost = proxyURL.Host
|
|
vmalertProxy = httputil.NewSingleHostReverseProxy(proxyURL)
|
|
}
|