mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-14 16:12:15 +01:00
app/vmselect: do not limit concurrency for static and fast queries
Previously concurrency for static and fast queries was limited with the -search.maxConcurrentRequests command-line flag. This could complicate identifying heavy queries via `vmui` at `Top queries` and `Active queries` pages, since `vmui` and these pages couldn't be opened on overloaded vmselect. Thanks to @f41gh7 for the idea.
This commit is contained in:
Aliaksandr Valialkin
parent
b6d6a3a530
commit
d868155751
@ -179,17 +179,13 @@ var (
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)
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func requestHandler(w http.ResponseWriter, r *http.Request) bool {
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if r.URL.Path == "/" {
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if r.Method != http.MethodGet {
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return false
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}
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w.Header().Add("Content-Type", "text/html; charset=utf-8")
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fmt.Fprintf(w, `vmselect - a component of VictoriaMetrics cluster<br/>
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<a href="https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html">docs</a><br>
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`)
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path := strings.Replace(r.URL.Path, "//", "/", -1)
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if handleStaticAndSimpleRequests(w, r, path) {
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return true
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}
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// Handle non-trivial dynamic requests, which may take big amounts of time and resources.
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startTime := time.Now()
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defer requestDuration.UpdateDuration(startTime)
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tracerEnabled := httputils.GetBool(r, "trace")
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@ -248,7 +244,6 @@ func requestHandler(w http.ResponseWriter, r *http.Request) bool {
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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 !httpserver.CheckAuthFlag(w, r, *resetCacheAuthKey, "resetCacheAuthKey") {
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return true
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@ -256,22 +251,6 @@ func requestHandler(w http.ResponseWriter, r *http.Request) bool {
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promql.ResetRollupResultCache()
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return true
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}
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if path == "/api/v1/status/top_queries" {
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globalTopQueriesRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := prometheus.QueryStatsHandler(startTime, nil, w, r); err != nil {
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globalTopQueriesErrors.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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if path == "/api/v1/status/active_queries" {
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globalStatusActiveQueriesRequests.Inc()
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httpserver.EnableCORS(w, r)
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promql.ActiveQueriesHandler(nil, w, r)
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return true
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}
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if path == "/admin/tenants" {
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tenantsRequests.Inc()
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httpserver.EnableCORS(w, r)
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@ -314,69 +293,6 @@ func selectHandler(qt *querytracer.Tracer, startTime time.Time, w http.ResponseW
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httpRequests.Get(at).Inc()
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httpRequestsDuration.Get(at).Add(int(time.Since(startTime).Milliseconds()))
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}()
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if p.Suffix == "" {
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if r.Method != http.MethodGet {
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return false
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}
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w.Header().Add("Content-Type", "text/html; charset=utf-8")
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fmt.Fprintf(w, "<h2>VictoriaMetrics cluster - vmselect</h2></br>")
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fmt.Fprintf(w, "See <a href='https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#url-format'>docs</a></br>")
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fmt.Fprintf(w, "Useful endpoints:</br>")
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fmt.Fprintf(w, `<a href="vmui">Web UI</a><br>`)
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fmt.Fprintf(w, `<a href="metric-relabel-debug">metric-level relabel debugging</a></br>`)
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fmt.Fprintf(w, `<a href="target-relabel-debug">target-level relabel debugging</a></br>`)
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fmt.Fprintf(w, `<a href="expand-with-exprs">WITH expressions' tutorial</a></br>`)
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fmt.Fprintf(w, `<a href="prometheus/api/v1/status/tsdb">tsdb status page</a><br>`)
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fmt.Fprintf(w, `<a href="prometheus/api/v1/status/top_queries">top queries</a><br>`)
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fmt.Fprintf(w, `<a href="prometheus/api/v1/status/active_queries">active queries</a><br>`)
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return true
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}
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if strings.HasPrefix(p.Suffix, "static") {
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prefix := strings.Join([]string{"", p.Prefix, p.AuthToken}, "/")
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http.StripPrefix(prefix, staticServer).ServeHTTP(w, r)
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return true
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}
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if strings.HasPrefix(p.Suffix, "prometheus/static") {
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prefix := strings.Join([]string{"", p.Prefix, p.AuthToken}, "/")
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r.URL.Path = strings.Replace(r.URL.Path, "/prometheus/static", "/static", 1)
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http.StripPrefix(prefix, staticServer).ServeHTTP(w, r)
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return true
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}
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if p.Suffix == "vmui" || p.Suffix == "graph" || p.Suffix == "prometheus/vmui" || p.Suffix == "prometheus/graph" {
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// VMUI access via incomplete url without `/` in the end. Redirect to complete url.
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// Use relative redirect, 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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suffix := strings.Replace(p.Suffix, "prometheus/", "../prometheus/", 1)
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newURL := suffix + "/?" + r.Form.Encode()
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httpserver.Redirect(w, newURL)
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return true
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}
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if strings.HasPrefix(p.Suffix, "graph/") || strings.HasPrefix(p.Suffix, "prometheus/graph/") {
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// This is needed for serving /graph URLs from Prometheus datasource in Grafana.
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p.Suffix = strings.Replace(p.Suffix, "graph/", "vmui/", 1)
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r.URL.Path = strings.Replace(r.URL.Path, "/graph/", "/vmui/", 1)
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}
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if p.Suffix == "vmui/custom-dashboards" || p.Suffix == "prometheus/vmui/custom-dashboards" {
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if err := handleVMUICustomDashboards(w); err != nil {
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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(p.Suffix, "vmui/") || strings.HasPrefix(p.Suffix, "prometheus/vmui/") {
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// vmui access.
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if strings.HasPrefix(p.Suffix, "vmui/static/") || strings.HasPrefix(p.Suffix, "prometheus/vmui/static/") {
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// Allow clients caching static contents for long period of time, since it shouldn't change over time.
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// Path to static contents (such as js and css) must be changed whenever its contents is changed.
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// See https://developer.chrome.com/docs/lighthouse/performance/uses-long-cache-ttl/
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w.Header().Set("Cache-Control", "max-age=31536000")
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}
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prefix := strings.Join([]string{"", p.Prefix, p.AuthToken}, "/")
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r.URL.Path = strings.Replace(r.URL.Path, "/prometheus/vmui/", "/vmui/", 1)
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http.StripPrefix(prefix, vmuiFileServer).ServeHTTP(w, r)
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return true
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}
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if strings.HasPrefix(p.Suffix, "prometheus/api/v1/label/") {
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s := p.Suffix[len("prometheus/api/v1/label/"):]
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if strings.HasSuffix(s, "/values") {
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@ -401,46 +317,6 @@ func selectHandler(qt *querytracer.Tracer, startTime time.Time, w http.ResponseW
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}
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return true
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}
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if strings.HasPrefix(p.Suffix, "graphite/functions") {
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funcName := p.Suffix[len("graphite/functions"):]
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funcName = strings.TrimPrefix(funcName, "/")
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if funcName == "" {
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graphiteFunctionsRequests.Inc()
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if err := graphite.FunctionsHandler(w, r); err != nil {
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graphiteFunctionsErrors.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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graphiteFunctionDetailsRequests.Inc()
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if err := graphite.FunctionDetailsHandler(funcName, w, r); err != nil {
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graphiteFunctionDetailsErrors.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 p.Suffix == "prometheus/vmalert" {
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// vmalert access via incomplete url without `/` in the end. Redirect to complete url.
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// Use relative redirect, 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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path := "../" + p.Suffix + "/"
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httpserver.Redirect(w, path)
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return true
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}
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if strings.HasPrefix(p.Suffix, "prometheus/vmalert/") {
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vmalertRequests.Inc()
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if len(*vmalertProxyURL) == 0 {
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w.WriteHeader(http.StatusBadRequest)
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w.Header().Set("Content-Type", "application/json")
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fmt.Fprintf(w, "%s", `{"status":"error","msg":"for accessing vmalert flag '-vmalert.proxyURL' must be configured"}`)
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return true
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}
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proxyVMAlertRequests(w, r, p.Suffix)
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return true
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}
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switch p.Suffix {
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case "prometheus/api/v1/query":
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@ -497,20 +373,6 @@ func selectHandler(qt *querytracer.Tracer, startTime time.Time, w http.ResponseW
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return true
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}
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return true
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case "prometheus/api/v1/status/active_queries":
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statusActiveQueriesRequests.Inc()
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httpserver.EnableCORS(w, r)
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promql.ActiveQueriesHandler(at, w, r)
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return true
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case "prometheus/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, at, w, r); err != nil {
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topQueriesErrors.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 "prometheus/api/v1/export":
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exportRequests.Inc()
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if err := prometheus.ExportHandler(startTime, at, w, r); err != nil {
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@ -519,14 +381,6 @@ func selectHandler(qt *querytracer.Tracer, startTime time.Time, w http.ResponseW
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return true
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}
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return true
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case "prometheus/api/v1/export/native":
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exportNativeRequests.Inc()
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if err := prometheus.ExportNativeHandler(startTime, at, 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 "prometheus/api/v1/export/csv":
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exportCSVRequests.Inc()
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if err := prometheus.ExportCSVHandler(startTime, at, w, r); err != nil {
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@ -535,6 +389,14 @@ func selectHandler(qt *querytracer.Tracer, startTime time.Time, w http.ResponseW
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return true
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}
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return true
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case "prometheus/api/v1/export/native":
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exportNativeRequests.Inc()
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if err := prometheus.ExportNativeHandler(startTime, at, 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 "prometheus/federate":
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federateRequests.Inc()
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if err := prometheus.FederateHandler(startTime, at, w, r); err != nil {
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@ -636,6 +498,167 @@ func selectHandler(qt *querytracer.Tracer, startTime time.Time, w http.ResponseW
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return true
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}
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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 handleStaticAndSimpleRequests(w http.ResponseWriter, r *http.Request, path string) bool {
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if path == "/" {
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if r.Method != http.MethodGet {
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return false
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}
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w.Header().Add("Content-Type", "text/html; charset=utf-8")
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fmt.Fprintf(w, `vmselect - a component of VictoriaMetrics cluster<br/>
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<a href="https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html">docs</a><br>
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`)
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return true
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}
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if path == "/api/v1/status/top_queries" {
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globalTopQueriesRequests.Inc()
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httpserver.EnableCORS(w, r)
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if err := prometheus.QueryStatsHandler(nil, w, r); err != nil {
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globalTopQueriesErrors.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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if path == "/api/v1/status/active_queries" {
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globalStatusActiveQueriesRequests.Inc()
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httpserver.EnableCORS(w, r)
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promql.ActiveQueriesHandler(nil, w, r)
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return true
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}
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p, err := httpserver.ParsePath(path)
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if err != nil {
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return false
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}
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if p.Suffix == "" {
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if r.Method != http.MethodGet {
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return false
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}
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w.Header().Add("Content-Type", "text/html; charset=utf-8")
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fmt.Fprintf(w, "<h2>VictoriaMetrics cluster - vmselect</h2></br>")
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fmt.Fprintf(w, "See <a href='https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#url-format'>docs</a></br>")
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fmt.Fprintf(w, "Useful endpoints:</br>")
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fmt.Fprintf(w, `<a href="vmui">Web UI</a><br>`)
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fmt.Fprintf(w, `<a href="metric-relabel-debug">metric-level relabel debugging</a></br>`)
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fmt.Fprintf(w, `<a href="target-relabel-debug">target-level relabel debugging</a></br>`)
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fmt.Fprintf(w, `<a href="expand-with-exprs">WITH expressions' tutorial</a></br>`)
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fmt.Fprintf(w, `<a href="prometheus/api/v1/status/tsdb">tsdb status page</a><br>`)
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fmt.Fprintf(w, `<a href="prometheus/api/v1/status/top_queries">top queries</a><br>`)
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fmt.Fprintf(w, `<a href="prometheus/api/v1/status/active_queries">active queries</a><br>`)
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return true
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}
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if strings.HasPrefix(p.Suffix, "static") {
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prefix := strings.Join([]string{"", p.Prefix, p.AuthToken}, "/")
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http.StripPrefix(prefix, staticServer).ServeHTTP(w, r)
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return true
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}
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if strings.HasPrefix(p.Suffix, "prometheus/static") {
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prefix := strings.Join([]string{"", p.Prefix, p.AuthToken}, "/")
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r.URL.Path = strings.Replace(r.URL.Path, "/prometheus/static", "/static", 1)
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http.StripPrefix(prefix, staticServer).ServeHTTP(w, r)
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return true
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}
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if p.Suffix == "vmui" || p.Suffix == "graph" || p.Suffix == "prometheus/vmui" || p.Suffix == "prometheus/graph" {
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// VMUI access via incomplete url without `/` in the end. Redirect to complete url.
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// Use relative redirect, 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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suffix := strings.Replace(p.Suffix, "prometheus/", "../prometheus/", 1)
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newURL := suffix + "/?" + r.Form.Encode()
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httpserver.Redirect(w, newURL)
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return true
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}
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if strings.HasPrefix(p.Suffix, "graph/") || strings.HasPrefix(p.Suffix, "prometheus/graph/") {
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// This is needed for serving /graph URLs from Prometheus datasource in Grafana.
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p.Suffix = strings.Replace(p.Suffix, "graph/", "vmui/", 1)
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r.URL.Path = strings.Replace(r.URL.Path, "/graph/", "/vmui/", 1)
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}
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if p.Suffix == "vmui/custom-dashboards" || p.Suffix == "prometheus/vmui/custom-dashboards" {
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if err := handleVMUICustomDashboards(w); err != nil {
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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(p.Suffix, "vmui/") || strings.HasPrefix(p.Suffix, "prometheus/vmui/") {
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// vmui access.
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if strings.HasPrefix(p.Suffix, "vmui/static/") || strings.HasPrefix(p.Suffix, "prometheus/vmui/static/") {
|
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// Allow clients caching static contents for long period of time, since it shouldn't change over time.
|
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// Path to static contents (such as js and css) must be changed whenever its contents is changed.
|
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// See https://developer.chrome.com/docs/lighthouse/performance/uses-long-cache-ttl/
|
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w.Header().Set("Cache-Control", "max-age=31536000")
|
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}
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prefix := strings.Join([]string{"", p.Prefix, p.AuthToken}, "/")
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r.URL.Path = strings.Replace(r.URL.Path, "/prometheus/vmui/", "/vmui/", 1)
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http.StripPrefix(prefix, vmuiFileServer).ServeHTTP(w, r)
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return true
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}
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if strings.HasPrefix(p.Suffix, "graphite/functions") {
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funcName := p.Suffix[len("graphite/functions"):]
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funcName = strings.TrimPrefix(funcName, "/")
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if funcName == "" {
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graphiteFunctionsRequests.Inc()
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if err := graphite.FunctionsHandler(w, r); err != nil {
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graphiteFunctionsErrors.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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graphiteFunctionDetailsRequests.Inc()
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if err := graphite.FunctionDetailsHandler(funcName, w, r); err != nil {
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graphiteFunctionDetailsErrors.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 p.Suffix == "prometheus/vmalert" {
|
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// vmalert access via incomplete url without `/` in the end. Redirect to complete url.
|
||||
// Use relative redirect, since the hostname and path prefix may be incorrect if VictoriaMetrics
|
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// is hidden behind vmauth or similar proxy.
|
||||
path := "../" + p.Suffix + "/"
|
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httpserver.Redirect(w, path)
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return true
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}
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if strings.HasPrefix(p.Suffix, "prometheus/vmalert/") {
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vmalertRequests.Inc()
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if len(*vmalertProxyURL) == 0 {
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w.WriteHeader(http.StatusBadRequest)
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w.Header().Set("Content-Type", "application/json")
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fmt.Fprintf(w, "%s", `{"status":"error","msg":"for accessing vmalert flag '-vmalert.proxyURL' must be configured"}`)
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return true
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}
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proxyVMAlertRequests(w, r, p.Suffix)
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return true
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}
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switch p.Suffix {
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case "prometheus/api/v1/status/active_queries":
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at, err := auth.NewToken(p.AuthToken)
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if err != nil {
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return false
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}
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statusActiveQueriesRequests.Inc()
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httpserver.EnableCORS(w, r)
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promql.ActiveQueriesHandler(at, w, r)
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return true
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case "prometheus/api/v1/status/top_queries":
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at, err := auth.NewToken(p.AuthToken)
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if err != nil {
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return false
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}
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topQueriesRequests.Inc()
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httpserver.EnableCORS(w, r)
|
||||
if err := prometheus.QueryStatsHandler(at, w, r); err != nil {
|
||||
topQueriesErrors.Inc()
|
||||
sendPrometheusError(w, r, err)
|
||||
return true
|
||||
}
|
||||
return true
|
||||
case "prometheus/metric-relabel-debug", "metric-relabel-debug":
|
||||
promrelabelMetricRelabelDebugRequests.Inc()
|
||||
metric := r.FormValue("metric")
|
||||
|
||||
@ -1162,9 +1162,7 @@ func getLatencyOffsetMilliseconds(r *http.Request) (int64, error) {
|
||||
}
|
||||
|
||||
// QueryStatsHandler returns query stats at `/api/v1/status/top_queries`
|
||||
func QueryStatsHandler(startTime time.Time, at *auth.Token, w http.ResponseWriter, r *http.Request) error {
|
||||
defer queryStatsDuration.UpdateDuration(startTime)
|
||||
|
||||
func QueryStatsHandler(at *auth.Token, w http.ResponseWriter, r *http.Request) error {
|
||||
topN := 20
|
||||
topNStr := r.FormValue("topN")
|
||||
if len(topNStr) > 0 {
|
||||
@ -1193,8 +1191,6 @@ func QueryStatsHandler(startTime time.Time, at *auth.Token, w http.ResponseWrite
|
||||
return nil
|
||||
}
|
||||
|
||||
var queryStatsDuration = metrics.NewSummary(`vm_request_duration_seconds{path="/api/v1/status/top_queries"}`)
|
||||
|
||||
// commonParams contains common parameters for all /api/v1/* handlers
|
||||
//
|
||||
// timeout, start, end, match[], extra_label, extra_filters[]
|
||||
|
||||
@ -28,6 +28,7 @@ The sandbox cluster installation is running under the constant load generated by
|
||||
|
||||
## tip
|
||||
|
||||
* FEATURE: `vmselect`: allow opening [vmui](https://docs.victoriametrics.com/#vmui) and investigating [Top queries](https://docs.victoriametrics.com/#top-queries) and [Active queries](https://docs.victoriametrics.com/#active-queries) when the `vmselect` is overloaded with concurrent queries (e.g. when more than `-search.maxConcurrentRequests` concurrent queries are executed). Previously an attempt to open `Top queries` or `Active queries` at `vmui` could result in `couldn't start executing the request in ... seconds, since -search.maxConcurrentRequests=... concurrent requests are executed` error, which could complicate debugging of overloaded `vmselect` or single-node VictoriaMetrics.
|
||||
* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): add `-remoteWrite.disableOnDiskQueue` command-line flag, which can be used for disabling data queueing to disk when the remote storage cannot keep up with the data ingestion rate. See [these docs](https://docs.victoriametrics.com/vmagent.html#disabling-on-disk-persistence) and [this feature request](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2110).
|
||||
* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): add support for reading and writing samples via [Google PubSub](https://cloud.google.com/pubsub). See [these docs](https://docs.victoriametrics.com/vmagent.html#google-pubsub-integration).
|
||||
* FEATURE: [vmagent](https://docs.victoriametrics.com/vmagent.html): add support for Datadog `/api/v2/series` and `/api/beta/sketches` ingestion protocols to vmagent/vminsert components. See this [doc](https://docs.victoriametrics.com/#how-to-send-data-from-datadog-agent) for examples. Thanks to @AndrewChubatiuk for the [pull request](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/5094).
|
||||
|
||||
Loading…
Reference in New Issue
Block a user